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Property development feasibility calculator

Run an end-to-end residential development feasibility — revenue, total development cost, profit, profit on cost, development margin and equity IRR — without rebuilding a spreadsheet model.

Run it in FeasoSee worked example

Formula

Profit = Net realisation − TDC

Net realisation = GRV − selling costs − GST. TDC = land + construction + fees + contributions + finance + contingency.

Inputs

Site
Address, lot size, zoning, allowable GFA.
Scheme
Number of units, mix (1/2/3-bed), average size, car parks.
Revenue
Per-unit pricing, car space pricing, agent and marketing rates.
Construction
Build rate per m², construction contingency, professional fees.
Statutory
Section 7.11 contributions, authority fees, GST treatment.
Finance
Equity, senior debt facility, interest rate, drawdown profile.
Timing
Acquisition, design, construction and settlement schedule.

Output

Outputs
GRV, TDC, profit, profit on cost, development margin, equity IRR, peak equity, peak debt — plus monthly and annual cashflow.

Worked example

A 28-apartment scheme in Waterloo on a 1,200 m² site:

  • GRV (28 units + car spaces): $28.6M
  • Net realisation: $26.2M
  • TDC: $24.1M
  • Profit: $2.1M
  • Profit on cost: 8.7%
  • Development margin: 8.0%
  • Equity IRR: 14.5%
  • Peak debt: $16.4M
  • Peak equity: $5.2M

Below typical hurdles. The scheme needs higher pricing, lower build cost, or a different scale before it clears IC.

What the calculator covers

Feaso runs the full Australian residential cost stack — including GST on revenue, statutory contributions, S-curve finance drawdown and selling costs on settlement — without you maintaining a single formula.

Related tools

Profit on cost calculator
The headline ratio for a residential feasibility.
Residual land value calculator
What you can pay for the land at your hurdle.
Development cash flow calculator
Monthly cashflow — peak debt, peak equity, distributions.
Equity IRR calculator
Time-weighted return on the equity invested.

Questions

Frequently asked

Is this calculator just for apartments?

It's optimised for residential apartments and townhouses. Single-house and land subdivision models are on the roadmap but not the main use case today.

Do I need to know my build cost per square metre?

Yes. Feaso accepts your construction rates as inputs — we don't publish a cost database. Use a recent QS estimate, or your own historical build rates.

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