PropDEV

Cost to build a house in Sydney's Eastern Suburbs

Sydney's Eastern Suburbs covers two distinct planning environments: the heritage-and-view-controlled harbourside corridor through Woollahra Council (Bellevue Hill, Double Bay, Rose Bay, Vaucluse, Point Piper), and the coastal-and-foreshore corridor through Waverley and Randwick Councils (Bondi, Bronte, Tamarama, Coogee, Clovelly). Both are at the top of Sydney's build-cost band — $5,500–$9,500/m² for premium-to-luxury work — but the cost drivers differ. This calculator is pre-configured for an Eastern Suburbs luxury new build with complex site difficulty.

Your inputs · Quick Assisted Mode

Deal basics

Enter the essentials. Everything else is assumed from our NSW rate library — you can drill in once the headline looks right.

What are you doing with this deal?
Realism (overrun buffer)5%
0% optimistic5% baseline25% stress test

Separate from contingency. Contingency = unknowns you haven't priced; overrun = things you HAVE priced that slip anyway (weather, scope creep, late deliveries, prices moving between estimate and order).

Builder, agent, rates & tax

Cost-plus margin, HBCF, buyer's agent (optional), council rates, GST. Defaults reflect Sydney 2025-26.

NSW Land Tax — many people don't know this exists

If your site's unimproved land value (council's UV figure) is above $1,075,000, you pay 1.6% per year on the amount above that — plus a flat $100. Above $6,571,000 the premium rate of 2% kicks in. On a typical $3M Sydney dev site that's about $31,000/year while you hold it.

Exemptions: your principal place of residence (PPR), active primary production, certain charities. Toggle below if exempt.

Building classification (NCC + NSW DBP)

Class 1a (single dwelling, own title) vs Class 2 (multi-unit, strata). Class 2 triggers NSW DBP Act 2020 — registered Design & Building Practitioners, regulated design declarations. ~$45k-$120k uplift + 1.5-4 months program impact.

Hold-mode inputs

Rental yield, hold period, and target net yield. Leave rent blank to infer from the NSW rental-yield rate library.

Affordability inputs

Owner-occupier mode — pick what you're doing, then fill in the numbers. NSW first-home-buyer concession applied automatically when eligible.

What are you doing?

Build cost is computed from the standard cost stack above (construction $/m² × dwelling area + soft costs + finance + contingency). Set dwelling size, quality, site difficulty in the main inputs to drive it.

Rate library NSW-2025.26 · last refreshed 2026-05-11
Results & analysis

Live as you type. Click any number to see the trace. Advanced analysis is collapsed by default — open the section near the bottom when you want scenarios, sensitivity, cash flow, and scale modelling.

Affordability — buy land + build

Land purchase, full build cost stack, construction loan. Stamp duty on land only; build costs roll into the mortgage.

Unaffordable on these inputs
Repayment exceeds serviceability cap or DTI is in regulator hot zone.
Upfront cash
$1,029,451
deposit + duty + LMI + legals
Monthly P&I
$60,603
@ 6.2% / 30y
Loan amount
$9,894,880
LVR 97.6% · DTI 45.0×
Serviceability
150%
of $4,917 cap
Project value composition
Land price: $5,500,000
Build cost: $4,634,880
Total project: $10,134,880

Stamp duty applies to the land purchase only. The build rolls into a construction loan that draws down progressively.

Upfront componentAUD
Cash deposit$240,000
Stamp duty$311,197
LMI(Applied (LVR > 80%))$474,954
Legals + inspection$3,300
Total upfront cash$1,029,451
Total interest paid over term
$11,922,226
If you hold the full term
Total cost of ownership
$22,846,557
Price + duty + LMI + legals + interest

Indicative only. Lenders apply their own serviceability formula with a stressed-rate buffer (typically +3pp on the actual rate). Stamp duty uses the NSW 2025-26 schedule with First Home Buyer Assistance Scheme thresholds. LMI is estimated against public premium tables — actual LMI varies by lender, postcode, and policy.

What this deal is telling you

1 critical2 warning

Plain-English read on the current numbers — risks, opportunities, and what to verify next. Sorted most-urgent first.

  • Not feasible at current inputs (-77.2% margin on cost)

    verdict

    Total revenue of $2,400,000 doesn't cover total cost of $10,544,924 with target margin. You'd lose $8,144,924.

    Next step: Try the What-if Solver on purchase price or sale price to see what the deal needs.

  • Build rate $9,750/m² is 236% above the Sydney median for house_and_land

    construction

    Sydney-metro 2025 median for house_and_land is roughly $2,900/m²/m². You're at $9,750/m² — that's a 236% premium.

    Next step: Sanity-check with a builder before commit — premium spec, difficult site, or just optimistic?

  • Contingency at 3.2% is thin for an early-feasibility project

    contingency

    At feasibility stage, ~10% contingency on construction + design is conventional. You're below that, so a single unpriced item (eg geotech surprise, demo cost, services upgrade) can knock the deal.

    Next step: Bump the project stage if the design's more advanced, or increase contingency in Pro Mode.

Here's how the numbers were built

Updates live as you edit

Revenue

  • Revenue of $2,400,000 comes from 1 house-and-land package selling at an average of $2,400,000 each.

Construction cost

  • Construction lands at $2,945,475300 m² of gross floor area × $9,750/m².
  • That rate is a Sydney metro luxury house-and-land build on a very difficult site (rate library, medium confidence). Plausible range: $7,080/m² – $15,000/m².
  • Difficult sites carry higher siteworks risk — verify excavation, rock, services, and access before committing.

Acquisition

  • Land acquisition totals $5,825,697 — the $5,500,000 purchase plus $325,697 of NSW stamp duty, legal, due diligence, and settlement adjustments.
  • Stamp duty alone runs against the current Revenue NSW schedule (1 July 2025 – 30 June 2026). The thresholds re-index every July.

Soft costs, finance & contingency

  • Planning & design — architect, engineers, planners, certifier, plus council/authority contributions — adds $204,729. Contributions vary wildly by council; this line carries low confidence and should be verified.
  • Project management, QS, insurance, and other professional fees add $88,364. Marketing, sales commission, and legal on sale add $83,100.
  • Finance — interest plus establishment and line fees — adds $712,612 at an indicative 9.5% rate and 65% loan-to-cost. Replace with a real lender quote before relying on this.
  • Holding costs — rates, NSW land tax, utilities while you develop — add $164,817 over the project life.
  • Contingency of $332,167 reflects the early feasibility stage. Earlier stages carry more contingency because more is unknown — it shrinks as the project matures and the builder quotes harden.

The bottom line

  • Total development cost is $10,544,924. Against revenue of $2,400,000, the deal yields -$8,144,924 of profit — a -77.2% margin on cost.
  • That's 95.2% below your 18% target — material rework needed (lower land price, higher sale prices, smaller spec, or all three).
  • Required equity is $3,624,936 with peak debt of $6,732,024 (simplified — a cash-flow-driven peak comes in the next phase). Return on equity comes in at -224.7%.

What would change the answer

  • Break-even sale price is $10,544,924 per house-and-land package — sale prices can drop by -339.4% before the deal loses money.

Cost breakdown

Every line is editable in Pro Mode (Phase G)
Total development cost$10,544,924
Advanced analysis
Scenarios · sensitivity · monthly cash flow & IRR · scale recommender
▸ open

Scenarios — how resilient is this deal?

Conservative stress-tests; optimistic gives it tailwinds.
ConservativeNot feasible
0%
net yield on cost
+0.0pp vs base
Annual cash
$0
Entry cost
$1,058,212
BaseNot feasible
0%
net yield on cost
Annual cash
$0
Entry cost
$1,029,451
OptimisticNot feasible
0%
net yield on cost
+0.0pp vs base
Annual cash
$0
Entry cost
$1,014,720

Conservative: -5% sale price, +7.5% build cost, +5pp overrun, +20% duration. Optimistic: +5% sale price, -5% build cost, -2pp overrun, -10% duration.

Sensitivity — which levers move the needle

Target: 3.5% net yield on cost
Lever-10%-5%Base+5%+10%
Sale price0%0%0%0%0%
Build cost0%0%0%0%0%
Duration0%0%0%0%0%
Overrun buffer0%0%0%0%0%
Meets targetWithin 15% of targetBelow target

What scale does this site need?

Target: 18.0% margin on cost

You're proposing 1 dwelling × 300 m² (300 m² total GFA) → 0.0% margin on cost.

No configuration in the search range meets your 18.0% target. The deal is fundamentally constrained — land is too expensive, sale prices too low, or costs too high. Consider revisiting the inputs before tuning scale.

Dwelling size (m²)3803603403203002802602402202001801601401201001234567891011121314151617181920Yield (dwellings)1 dwellings × 380 m² → 0.0% margin on cost (fail)2 dwellings × 380 m² → 0.0% margin on cost (fail)3 dwellings × 380 m² → 0.0% margin on cost (fail)4 dwellings × 380 m² → 0.0% margin on cost (fail)5 dwellings × 380 m² → 0.0% margin on cost (fail)6 dwellings × 380 m² → 0.0% margin on cost (fail)7 dwellings × 380 m² → 0.0% margin on cost (fail)8 dwellings × 380 m² → 0.0% margin on cost (fail)9 dwellings × 380 m² → 0.0% margin on cost (fail)10 dwellings × 380 m² → 0.0% margin on cost (fail)11 dwellings × 380 m² → 0.0% margin on cost (fail)12 dwellings × 380 m² → 0.0% margin on cost (fail)13 dwellings × 380 m² → 0.0% margin on cost (fail)14 dwellings × 380 m² → 0.0% margin on cost (fail)15 dwellings × 380 m² → 0.0% margin on cost (fail)16 dwellings × 380 m² → 0.0% margin on cost (fail)17 dwellings × 380 m² → 0.0% margin on cost (fail)18 dwellings × 380 m² → 0.0% margin on cost (fail)19 dwellings × 380 m² → 0.0% margin on cost (fail)20 dwellings × 380 m² → 0.0% margin on cost (fail)1 dwellings × 360 m² → 0.0% margin on cost (fail)2 dwellings × 360 m² → 0.0% margin on cost (fail)3 dwellings × 360 m² → 0.0% margin on cost (fail)4 dwellings × 360 m² → 0.0% margin on cost (fail)5 dwellings × 360 m² → 0.0% margin on cost (fail)6 dwellings × 360 m² → 0.0% margin on cost (fail)7 dwellings × 360 m² → 0.0% margin on cost (fail)8 dwellings × 360 m² → 0.0% margin on cost (fail)9 dwellings × 360 m² → 0.0% margin on cost (fail)10 dwellings × 360 m² → 0.0% margin on cost (fail)11 dwellings × 360 m² → 0.0% margin on cost (fail)12 dwellings × 360 m² → 0.0% margin on cost (fail)13 dwellings × 360 m² → 0.0% margin on cost (fail)14 dwellings × 360 m² → 0.0% margin on cost (fail)15 dwellings × 360 m² → 0.0% margin on cost (fail)16 dwellings × 360 m² → 0.0% margin on cost (fail)17 dwellings × 360 m² → 0.0% margin on cost (fail)18 dwellings × 360 m² → 0.0% margin on cost (fail)19 dwellings × 360 m² → 0.0% margin on cost (fail)20 dwellings × 360 m² → 0.0% margin on cost (fail)1 dwellings × 340 m² → 0.0% margin on cost (fail)2 dwellings × 340 m² → 0.0% margin on cost (fail)3 dwellings × 340 m² → 0.0% margin on cost (fail)4 dwellings × 340 m² → 0.0% margin on cost (fail)5 dwellings × 340 m² → 0.0% margin on cost (fail)6 dwellings × 340 m² → 0.0% margin on cost (fail)7 dwellings × 340 m² → 0.0% margin on cost (fail)8 dwellings × 340 m² → 0.0% margin on cost (fail)9 dwellings × 340 m² → 0.0% margin on cost (fail)10 dwellings × 340 m² → 0.0% margin on cost (fail)11 dwellings × 340 m² → 0.0% margin on cost (fail)12 dwellings × 340 m² → 0.0% margin on cost (fail)13 dwellings × 340 m² → 0.0% margin on cost (fail)14 dwellings × 340 m² → 0.0% margin on cost (fail)15 dwellings × 340 m² → 0.0% margin on cost (fail)16 dwellings × 340 m² → 0.0% margin on cost (fail)17 dwellings × 340 m² → 0.0% margin on cost (fail)18 dwellings × 340 m² → 0.0% margin on cost (fail)19 dwellings × 340 m² → 0.0% margin on cost (fail)20 dwellings × 340 m² → 0.0% margin on cost (fail)1 dwellings × 320 m² → 0.0% margin on cost (fail)2 dwellings × 320 m² → 0.0% margin on cost (fail)3 dwellings × 320 m² → 0.0% margin on cost (fail)4 dwellings × 320 m² → 0.0% margin on cost (fail)5 dwellings × 320 m² → 0.0% margin on cost (fail)6 dwellings × 320 m² → 0.0% margin on cost (fail)7 dwellings × 320 m² → 0.0% margin on cost (fail)8 dwellings × 320 m² → 0.0% margin on cost (fail)9 dwellings × 320 m² → 0.0% margin on cost (fail)10 dwellings × 320 m² → 0.0% margin on cost (fail)11 dwellings × 320 m² → 0.0% margin on cost (fail)12 dwellings × 320 m² → 0.0% margin on cost (fail)13 dwellings × 320 m² → 0.0% margin on cost (fail)14 dwellings × 320 m² → 0.0% margin on cost (fail)15 dwellings × 320 m² → 0.0% margin on cost (fail)16 dwellings × 320 m² → 0.0% margin on cost (fail)17 dwellings × 320 m² → 0.0% margin on cost (fail)18 dwellings × 320 m² → 0.0% margin on cost (fail)19 dwellings × 320 m² → 0.0% margin on cost (fail)20 dwellings × 320 m² → 0.0% margin on cost (fail)1 dwellings × 300 m² → 0.0% margin on cost (fail)2 dwellings × 300 m² → 0.0% margin on cost (fail)3 dwellings × 300 m² → 0.0% margin on cost (fail)4 dwellings × 300 m² → 0.0% margin on cost (fail)5 dwellings × 300 m² → 0.0% margin on cost (fail)6 dwellings × 300 m² → 0.0% margin on cost (fail)7 dwellings × 300 m² → 0.0% margin on cost (fail)8 dwellings × 300 m² → 0.0% margin on cost (fail)9 dwellings × 300 m² → 0.0% margin on cost (fail)10 dwellings × 300 m² → 0.0% margin on cost (fail)11 dwellings × 300 m² → 0.0% margin on cost (fail)12 dwellings × 300 m² → 0.0% margin on cost (fail)13 dwellings × 300 m² → 0.0% margin on cost (fail)14 dwellings × 300 m² → 0.0% margin on cost (fail)15 dwellings × 300 m² → 0.0% margin on cost (fail)16 dwellings × 300 m² → 0.0% margin on cost (fail)17 dwellings × 300 m² → 0.0% margin on cost (fail)18 dwellings × 300 m² → 0.0% margin on cost (fail)19 dwellings × 300 m² → 0.0% margin on cost (fail)20 dwellings × 300 m² → 0.0% margin on cost (fail)1 dwellings × 280 m² → 0.0% margin on cost (fail)2 dwellings × 280 m² → 0.0% margin on cost (fail)3 dwellings × 280 m² → 0.0% margin on cost (fail)4 dwellings × 280 m² → 0.0% margin on cost (fail)5 dwellings × 280 m² → 0.0% margin on cost (fail)6 dwellings × 280 m² → 0.0% margin on cost (fail)7 dwellings × 280 m² → 0.0% margin on cost (fail)8 dwellings × 280 m² → 0.0% margin on cost (fail)9 dwellings × 280 m² → 0.0% margin on cost (fail)10 dwellings × 280 m² → 0.0% margin on cost (fail)11 dwellings × 280 m² → 0.0% margin on cost (fail)12 dwellings × 280 m² → 0.0% margin on cost (fail)13 dwellings × 280 m² → 0.0% margin on cost (fail)14 dwellings × 280 m² → 0.0% margin on cost (fail)15 dwellings × 280 m² → 0.0% margin on cost (fail)16 dwellings × 280 m² → 0.0% margin on cost (fail)17 dwellings × 280 m² → 0.0% margin on cost (fail)18 dwellings × 280 m² → 0.0% margin on cost (fail)19 dwellings × 280 m² → 0.0% margin on cost (fail)20 dwellings × 280 m² → 0.0% margin on cost (fail)1 dwellings × 260 m² → 0.0% margin on cost (fail)2 dwellings × 260 m² → 0.0% margin on cost (fail)3 dwellings × 260 m² → 0.0% margin on cost (fail)4 dwellings × 260 m² → 0.0% margin on cost (fail)5 dwellings × 260 m² → 0.0% margin on cost (fail)6 dwellings × 260 m² → 0.0% margin on cost (fail)7 dwellings × 260 m² → 0.0% margin on cost (fail)8 dwellings × 260 m² → 0.0% margin on cost (fail)9 dwellings × 260 m² → 0.0% margin on cost (fail)10 dwellings × 260 m² → 0.0% margin on cost (fail)11 dwellings × 260 m² → 0.0% margin on cost (fail)12 dwellings × 260 m² → 0.0% margin on cost (fail)13 dwellings × 260 m² → 0.0% margin on cost (fail)14 dwellings × 260 m² → 0.0% margin on cost (fail)15 dwellings × 260 m² → 0.0% margin on cost (fail)16 dwellings × 260 m² → 0.0% margin on cost (fail)17 dwellings × 260 m² → 0.0% margin on cost (fail)18 dwellings × 260 m² → 0.0% margin on cost (fail)19 dwellings × 260 m² → 0.0% margin on cost (fail)20 dwellings × 260 m² → 0.0% margin on cost (fail)1 dwellings × 240 m² → 0.0% margin on cost (fail)2 dwellings × 240 m² → 0.0% margin on cost (fail)3 dwellings × 240 m² → 0.0% margin on cost (fail)4 dwellings × 240 m² → 0.0% margin on cost (fail)5 dwellings × 240 m² → 0.0% margin on cost (fail)6 dwellings × 240 m² → 0.0% margin on cost (fail)7 dwellings × 240 m² → 0.0% margin on cost (fail)8 dwellings × 240 m² → 0.0% margin on cost (fail)9 dwellings × 240 m² → 0.0% margin on cost (fail)10 dwellings × 240 m² → 0.0% margin on cost (fail)11 dwellings × 240 m² → 0.0% margin on cost (fail)12 dwellings × 240 m² → 0.0% margin on cost (fail)13 dwellings × 240 m² → 0.0% margin on cost (fail)14 dwellings × 240 m² → 0.0% margin on cost (fail)15 dwellings × 240 m² → 0.0% margin on cost (fail)16 dwellings × 240 m² → 0.0% margin on cost (fail)17 dwellings × 240 m² → 0.0% margin on cost (fail)18 dwellings × 240 m² → 0.0% margin on cost (fail)19 dwellings × 240 m² → 0.0% margin on cost (fail)20 dwellings × 240 m² → 0.0% margin on cost (fail)1 dwellings × 220 m² → 0.0% margin on cost (fail)2 dwellings × 220 m² → 0.0% margin on cost (fail)3 dwellings × 220 m² → 0.0% margin on cost (fail)4 dwellings × 220 m² → 0.0% margin on cost (fail)5 dwellings × 220 m² → 0.0% margin on cost (fail)6 dwellings × 220 m² → 0.0% margin on cost (fail)7 dwellings × 220 m² → 0.0% margin on cost (fail)8 dwellings × 220 m² → 0.0% margin on cost (fail)9 dwellings × 220 m² → 0.0% margin on cost (fail)10 dwellings × 220 m² → 0.0% margin on cost (fail)11 dwellings × 220 m² → 0.0% margin on cost (fail)12 dwellings × 220 m² → 0.0% margin on cost (fail)13 dwellings × 220 m² → 0.0% margin on cost (fail)14 dwellings × 220 m² → 0.0% margin on cost (fail)15 dwellings × 220 m² → 0.0% margin on cost (fail)16 dwellings × 220 m² → 0.0% margin on cost (fail)17 dwellings × 220 m² → 0.0% margin on cost (fail)18 dwellings × 220 m² → 0.0% margin on cost (fail)19 dwellings × 220 m² → 0.0% margin on cost (fail)20 dwellings × 220 m² → 0.0% margin on cost (fail)1 dwellings × 200 m² → 0.0% margin on cost (fail)2 dwellings × 200 m² → 0.0% margin on cost (fail)3 dwellings × 200 m² → 0.0% margin on cost (fail)4 dwellings × 200 m² → 0.0% margin on cost (fail)5 dwellings × 200 m² → 0.0% margin on cost (fail)6 dwellings × 200 m² → 0.0% margin on cost (fail)7 dwellings × 200 m² → 0.0% margin on cost (fail)8 dwellings × 200 m² → 0.0% margin on cost (fail)9 dwellings × 200 m² → 0.0% margin on cost (fail)10 dwellings × 200 m² → 0.0% margin on cost (fail)11 dwellings × 200 m² → 0.0% margin on cost (fail)12 dwellings × 200 m² → 0.0% margin on cost (fail)13 dwellings × 200 m² → 0.0% margin on cost (fail)14 dwellings × 200 m² → 0.0% margin on cost (fail)15 dwellings × 200 m² → 0.0% margin on cost (fail)16 dwellings × 200 m² → 0.0% margin on cost (fail)17 dwellings × 200 m² → 0.0% margin on cost (fail)18 dwellings × 200 m² → 0.0% margin on cost (fail)19 dwellings × 200 m² → 0.0% margin on cost (fail)20 dwellings × 200 m² → 0.0% margin on cost (fail)1 dwellings × 180 m² → 0.0% margin on cost (fail)2 dwellings × 180 m² → 0.0% margin on cost (fail)3 dwellings × 180 m² → 0.0% margin on cost (fail)4 dwellings × 180 m² → 0.0% margin on cost (fail)5 dwellings × 180 m² → 0.0% margin on cost (fail)6 dwellings × 180 m² → 0.0% margin on cost (fail)7 dwellings × 180 m² → 0.0% margin on cost (fail)8 dwellings × 180 m² → 0.0% margin on cost (fail)9 dwellings × 180 m² → 0.0% margin on cost (fail)10 dwellings × 180 m² → 0.0% margin on cost (fail)11 dwellings × 180 m² → 0.0% margin on cost (fail)12 dwellings × 180 m² → 0.0% margin on cost (fail)13 dwellings × 180 m² → 0.0% margin on cost (fail)14 dwellings × 180 m² → 0.0% margin on cost (fail)15 dwellings × 180 m² → 0.0% margin on cost (fail)16 dwellings × 180 m² → 0.0% margin on cost (fail)17 dwellings × 180 m² → 0.0% margin on cost (fail)18 dwellings × 180 m² → 0.0% margin on cost (fail)19 dwellings × 180 m² → 0.0% margin on cost (fail)20 dwellings × 180 m² → 0.0% margin on cost (fail)1 dwellings × 160 m² → 0.0% margin on cost (fail)2 dwellings × 160 m² → 0.0% margin on cost (fail)3 dwellings × 160 m² → 0.0% margin on cost (fail)4 dwellings × 160 m² → 0.0% margin on cost (fail)5 dwellings × 160 m² → 0.0% margin on cost (fail)6 dwellings × 160 m² → 0.0% margin on cost (fail)7 dwellings × 160 m² → 0.0% margin on cost (fail)8 dwellings × 160 m² → 0.0% margin on cost (fail)9 dwellings × 160 m² → 0.0% margin on cost (fail)10 dwellings × 160 m² → 0.0% margin on cost (fail)11 dwellings × 160 m² → 0.0% margin on cost (fail)12 dwellings × 160 m² → 0.0% margin on cost (fail)13 dwellings × 160 m² → 0.0% margin on cost (fail)14 dwellings × 160 m² → 0.0% margin on cost (fail)15 dwellings × 160 m² → 0.0% margin on cost (fail)16 dwellings × 160 m² → 0.0% margin on cost (fail)17 dwellings × 160 m² → 0.0% margin on cost (fail)18 dwellings × 160 m² → 0.0% margin on cost (fail)19 dwellings × 160 m² → 0.0% margin on cost (fail)20 dwellings × 160 m² → 0.0% margin on cost (fail)1 dwellings × 140 m² → 0.0% margin on cost (fail)2 dwellings × 140 m² → 0.0% margin on cost (fail)3 dwellings × 140 m² → 0.0% margin on cost (fail)4 dwellings × 140 m² → 0.0% margin on cost (fail)5 dwellings × 140 m² → 0.0% margin on cost (fail)6 dwellings × 140 m² → 0.0% margin on cost (fail)7 dwellings × 140 m² → 0.0% margin on cost (fail)8 dwellings × 140 m² → 0.0% margin on cost (fail)9 dwellings × 140 m² → 0.0% margin on cost (fail)10 dwellings × 140 m² → 0.0% margin on cost (fail)11 dwellings × 140 m² → 0.0% margin on cost (fail)12 dwellings × 140 m² → 0.0% margin on cost (fail)13 dwellings × 140 m² → 0.0% margin on cost (fail)14 dwellings × 140 m² → 0.0% margin on cost (fail)15 dwellings × 140 m² → 0.0% margin on cost (fail)16 dwellings × 140 m² → 0.0% margin on cost (fail)17 dwellings × 140 m² → 0.0% margin on cost (fail)18 dwellings × 140 m² → 0.0% margin on cost (fail)19 dwellings × 140 m² → 0.0% margin on cost (fail)20 dwellings × 140 m² → 0.0% margin on cost (fail)1 dwellings × 120 m² → 0.0% margin on cost (fail)2 dwellings × 120 m² → 0.0% margin on cost (fail)3 dwellings × 120 m² → 0.0% margin on cost (fail)4 dwellings × 120 m² → 0.0% margin on cost (fail)5 dwellings × 120 m² → 0.0% margin on cost (fail)6 dwellings × 120 m² → 0.0% margin on cost (fail)7 dwellings × 120 m² → 0.0% margin on cost (fail)8 dwellings × 120 m² → 0.0% margin on cost (fail)9 dwellings × 120 m² → 0.0% margin on cost (fail)10 dwellings × 120 m² → 0.0% margin on cost (fail)11 dwellings × 120 m² → 0.0% margin on cost (fail)12 dwellings × 120 m² → 0.0% margin on cost (fail)13 dwellings × 120 m² → 0.0% margin on cost (fail)14 dwellings × 120 m² → 0.0% margin on cost (fail)15 dwellings × 120 m² → 0.0% margin on cost (fail)16 dwellings × 120 m² → 0.0% margin on cost (fail)17 dwellings × 120 m² → 0.0% margin on cost (fail)18 dwellings × 120 m² → 0.0% margin on cost (fail)19 dwellings × 120 m² → 0.0% margin on cost (fail)20 dwellings × 120 m² → 0.0% margin on cost (fail)1 dwellings × 100 m² → 0.0% margin on cost (fail)2 dwellings × 100 m² → 0.0% margin on cost (fail)3 dwellings × 100 m² → 0.0% margin on cost (fail)4 dwellings × 100 m² → 0.0% margin on cost (fail)5 dwellings × 100 m² → 0.0% margin on cost (fail)6 dwellings × 100 m² → 0.0% margin on cost (fail)7 dwellings × 100 m² → 0.0% margin on cost (fail)8 dwellings × 100 m² → 0.0% margin on cost (fail)9 dwellings × 100 m² → 0.0% margin on cost (fail)10 dwellings × 100 m² → 0.0% margin on cost (fail)11 dwellings × 100 m² → 0.0% margin on cost (fail)12 dwellings × 100 m² → 0.0% margin on cost (fail)13 dwellings × 100 m² → 0.0% margin on cost (fail)14 dwellings × 100 m² → 0.0% margin on cost (fail)15 dwellings × 100 m² → 0.0% margin on cost (fail)16 dwellings × 100 m² → 0.0% margin on cost (fail)17 dwellings × 100 m² → 0.0% margin on cost (fail)18 dwellings × 100 m² → 0.0% margin on cost (fail)19 dwellings × 100 m² → 0.0% margin on cost (fail)20 dwellings × 100 m² → 0.0% margin on cost (fail)
Meets 18.0% targetWithin 15% of targetBelow targetYour current scaleSmallest passing
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① Cost overrides — override any rate-library cell

Pro Mode — override anything (optional)

Pin a cell to a value you've quoted, modelled, or know from experience. Leave every cell blank to use the Quick number unchanged — this whole panel is optional. Quick and Pro share one engine, so any override you do set flows through to every headline metric, scenario, sensitivity, and cash flow row above.

Underlying rates

RateQuick (library)Your overrideActive value
Construction rate (AUD/m²)$9,750/m²$9,750/m²
Interest rate (decimal, e.g. 0.085)9.5%9.5%
Loan-to-cost ratio (decimal, e.g. 0.65)65%65%

Cost buckets

BucketQuick (derived)Your overrideActive value
Acquisition (land, stamp duty, legals)$5,825,697$5,825,697
Planning & design$204,729$204,729
Construction$2,945,475$2,945,475
Professional fees$88,364$88,364
Finance$712,612$712,612
Holding$164,817$164,817
Marketing & selling$83,100$83,100
Contingency$332,167$332,167
Taxes & duties$0$0
Total development cost (reconciled)$10,356,960$10,356,960

Overridden cells flip their trust badge to Overridden · High confidence and replace the rate-library lookup. Click any number on the dashboard above to see the full trace, including which fields are now user-pinned.

② Construction BoQ — trade-by-trade drill-down

Construction BoQ — trade-level drill-down (optional)

The Quick construction number (rate × GFA) seeded across 9 trade categories so you can drill in. Leave every cell untouched to use the Quick number unchanged — this panel only activates when you edit a qty, rate, or label. Once touched, the BoQ total replaces the Quick construction figure in the override layer above.

Seed (Quick)
$2,945,475
BoQ total
$2,945,475
Δ vs seed
+$0
Untouched seed — the Quick construction number is still in effect. Edit any cell below to activate the BoQ as a construction-cost override.
Construction total$2,945,475
③ Assemblies catalogue — bathrooms, kitchens, slabs

Takeoff & assemblies — bottom-up line items (optional)

Pick an assembly (bathroom, kitchen, slab, roof…), set how many driver units (e.g. 8 bathrooms = 4 dwellings × 2), and pop it into the construction BoQ as editable line items. Each line carries qty × rate × waste, with MOQ where it applies.
Skip this panel entirely if you don't want to specify beds, baths, slabs, etc. Nothing here is required — the Quick construction number stays in effect until you actually click Apply and Pop into BoQ.

Catalogue

Standard bathroom
~5 m² bathroom: waterproofing, tiling, vanity, tapware, drain, door, exhaust.
Trade: Fitout (kitchen, bathroom, joinery)Driver: bathroom8 sub-items
per bathroom
$10,360
Premium ensuite
~7 m² ensuite with double vanity, freestanding shower, premium tile + tapware.
Trade: Fitout (kitchen, bathroom, joinery)Driver: ensuite8 sub-items
per ensuite
$20,803
Standard kitchen
Mid-range kitchen: stone benches, joinery, appliances, splashback, tapware.
Trade: Fitout (kitchen, bathroom, joinery)Driver: kitchen7 sub-items
per kitchen
$19,724
Premium kitchen
Premium joinery, integrated appliances, butler's pantry, stone island.
Trade: Fitout (kitchen, bathroom, joinery)Driver: kitchen7 sub-items
per kitchen
$49,857
Suspended concrete slab
Reinforced suspended slab — formwork, reo, concrete, finishing.
Trade: SubstructureDriver: 4 sub-items
per
$3,462
Colorbond roof
Pitched Colorbond sheet roof with sarking, battens, gutters & downpipes.
Trade: External envelopeDriver: m² of roof4 sub-items
per m² of roof
$169
Basement carpark bay
Per-bay all-in: slab share, ventilation, lighting, paint, line-marking.
Trade: SubstructureDriver: bay4 sub-items
per bay
$14,108
Concrete driveway
Reinforced concrete driveway with sub-base prep and finish.
Trade: External works & landscapingDriver: 3 sub-items
per
$5,012

Applied (0)

No assemblies applied yet. Pick one from the catalogue, set the driver qty, and click Apply.

Pop into BoQ imports the assembly's line items into the construction breakdown as concrete editable rows. Once imported, they're normal BoQ lines — re-applying the same assembly later appends new lines, it doesn't update old ones.

Export & share

Download a branded PDF summary, export the cost & cash flow tables as CSV, or copy a share link that re-opens this exact feasibility for someone else (lender, partner, accountant). Everything stays client-side — nothing is uploaded.

PDF includes verdict, headline stats, cost breakdown, insights, and key derived assumptions. Share link encodes the project state — anyone who opens it sees the same numbers.

Indicative feasibility only. Not financial, legal, tax, or planning advice. Verify all assumptions with your professional advisers before relying on any number here.

Woollahra Council — heritage, view sharing, and assessment timelines

Woollahra is one of Sydney's most planning-controlled councils. A high share of the LGA sits inside heritage conservation areas; view-sharing objections under the Tenacity principles are frequent and well-funded; assessment timelines for substantive residential DAs typically run 8–14 months and complex sites can run beyond 18 months. Pre-lodgement meetings, heritage consultancy, and view analysis are effectively mandatory. The Heritage Impact Statement, view loss assessment, and neighbour consultation costs alone often add $40–80k before any design documentation is finalised.

Waverley and Randwick — coastal, foreshore, and density controls

Waverley (Bondi, Bronte, Tamarama) and Randwick (Coogee, Clovelly, Maroubra) apply foreshore building lines on coastal lots and have detailed DCP controls on bulk, scale, FSR, and overshadowing. Heritage conservation areas exist across both LGAs — Bondi Beach, Bronte, and parts of Coogee have significant listings. Coastal exposure drives material durability requirements (marine-grade fixings, salt-tolerant finishes) and tanking specification for below-ground spaces close to the water table.

Why Eastern Suburbs build rates compress to the top of the range

Three drivers. (1) Brief: nearly all Eastern Suburbs new builds and major renovations specify premium-to-luxury inclusions — stone, joinery, structural glass, wine cellars, pools, smart-home — which pushes per-m² independent of site. (2) Site: harbourside slopes, bedrock-shallow sites, and heritage envelopes all add cost above flat-suburban Sydney. (3) Builder capacity: a small number of builders are trusted by Eastern Suburbs architects and clients, and demand exceeds supply, so margin compression doesn't happen the way it does in lower-demand markets. The headline $/m² rate doesn't compress until you go down a quality tier — and most Eastern Suburbs clients aren't willing to.

Tanking, basements, and the harbour-edge water table

Harbourside and coastal Eastern Suburbs sites share the same waterproofing challenge as Lower North Shore: high water tables, salt exposure, and below-ground living spaces (basements, cellars, pool plant rooms, lower-ground bedrooms) that must be tanked to durable spec. Cosmofin or Sika multi-layer membrane systems with drained cavity to the inside face are the appropriate spec; generic bituminous-only systems are not. Tanking failures on harbour-edge Eastern Suburbs builds are extremely expensive to remediate — price tanking explicitly in the contract, not buried in a general waterproofing line.

Frequently asked questions

How much does it cost to build a house in Sydney's Eastern Suburbs?

Eastern Suburbs build rates in 2025–26 typically run $5,500–$9,500 per m² for premium-to-luxury work. A 280m² Eastern Suburbs family home build typically lands $1.7M–$2.8M for construction alone, before land, demolition, DA, and soft costs. Heritage, view-sharing, and below-ground tanking can push the upper end higher.

How long does Woollahra Council take to approve a DA?

Woollahra Council residential DA assessment typically runs 8–14 months from lodgement for a substantive scope, and 14–24 months for heritage-affected or view-sharing-contested applications. Pre-lodgement meetings and early heritage consultancy are essential to control the program.

Is my Eastern Suburbs property in a heritage conservation area?

Significant portions of Woollahra, Waverley, and Randwick LGAs sit inside heritage conservation areas — Paddington, Centennial Park, Bellevue Hill, Bondi, Bronte and parts of Vaucluse and Coogee in particular. Check the relevant council's LEP and DCP on the NSW Planning Portal, or run our free /block-report tool for a desktop summary.

What's a view-sharing objection?

Under NSW Land and Environment Court precedent (Tenacity Consulting v Warringah Council), neighbours can object to a development on the grounds that it materially impacts their view. The assessor weighs the view loss against your design rights using a four-step test. View-sharing is a recurring DA issue in Eastern Suburbs harbourside and coastal streets; allow time and contingency for a redesign if objections force changes.

Does Varloch build in the Eastern Suburbs?

Yes. The Eastern Suburbs is part of Varloch's core service area, alongside the Lower North Shore, Northern Beaches, and Inner West. Use /contact to discuss your address, scope, and budget — we'll be straight about fit against our ten-job concurrent cap.

Disclaimer

PropDEV is a feasibility-modelling tool by Varloch Studio. The numbers it produces are indicative estimates based on user-entered inputs and assumed rates from a rate library that is updated periodically. PropDEV does not provide financial, legal, tax, planning, valuation, or construction advice, and its output should not be used as a substitute for professional advice from a qualified accountant, lawyer, town planner, quantity surveyor, valuer, lender, or builder. Stamp duty, council contributions, GST treatment, finance terms, and construction rates change frequently and vary by location, lender, council, and project — every figure in a report must be verified independently before any acquisition, finance, or planning decision is made. Use at your own risk.

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