Property Development Modeling

Know the profit
before you sign the contract.

Eight guided steps from land price to profit, margin on cost and residual land value - the same feasibility a development manager would build, without the spreadsheet.

Free account · works on any device · installs like an app

hummingbirdventures.com
3 townhouses, 12 Acacia Street — summary
Total development cost$4.98m
Profit$918k
Margin on cost18.4%
Residual land value$1.62m
Equity required$1.10m
Interest & fees$214k
8-step wizardland to profit, nothing forgotten
Stamp duty auto-calccomputed for your state
GST margin schememodelled properly, not ignored
Residual land valuethe most you should ever pay
Features

Every cost a development actually has

Townhouses, subdivisions, splitters - the wizard walks every line item so optimism can't hide in a forgotten row.

Project setup

Address, project type - townhouses, subdivisions, splitters and more - plus the number of dwellings or lots planned.

Land & acquisition

Purchase price with stamp duty auto-calculated for your state, plus legals, agent fees, due diligence and holding costs.

Soft costs

Design, consultants, permits and authority contributions - the guessed-at costs that quietly sink most feasibilities.

Construction

Build cost by area or as a lump sum, with contingency and demolition - sensible defaults you can override at any time.

Sales & GST

Expected sale price per dwelling or lot and all the selling costs, with proper GST treatment - margin scheme included.

Equity & finance

Equity in, loan interest, fees and the interest period - so funding costs live inside the number, not in a footnote.

The summary

Cost, profit, margin on cost and residual land value - plus a candid AI review and one-click logging to your Decisions journal.

Comps & planning evidence

Paste a listing link or let AI search find sold comparables - and a council link reads the zoning constraints into the notes.

Pipeline & history

Saved reports with statuses from Prospect to Passed, side-by-side comparison, and autosaved snapshots of every change.

Profit scenarios

Three sale-price scenarios with the profit, margin, ROI and ROE on each - see how much cushion the deal really carries.

Investor presentations

One click on the summary turns the live model into a hosted investor deck - cover stats, cost bars, scenarios, verdict.

AI import

Upload a listing, contract of sale, builder's quote or old spreadsheet - the figures read themselves in for your review.

In depth

From back-of-envelope to bank-ready

The number that matters

Residual land value: your walk-away price

Work backwards from end values through every cost and your required margin, and the summary tells you the most you can pay for the land. Negotiate from arithmetic, not emotion.

  • Profit, margin on cost and total development cost together
  • Change any assumption and the summary recomputes instantly
  • Everything autosaves as you type
hummingbirdventures.com
The 8-step wizard — nothing forgotten
✓Project — 3 townhouses
✓Land — $1.45m + stamp duty
✓Acquisition costs
✓Soft costs — design & permits
✓Construction — $2.2m
✓Sales & GST — margin scheme
✓Equity & finance
8Summary — profit $918k
Pipeline

Run your whole pipeline, not one deal

Every site you assess becomes a saved report with a status. Compare candidates side by side, keep the history of every assumption change, and duplicate a report to test a different scheme on the same site.

  • Statuses from Prospect through to Completed or Passed
  • Tick two or more reports to compare side by side
  • Autosaved snapshots - see how the deal evolved
hummingbirdventures.com
Pipeline — every site you've run the numbers on
12 Acacia St — 3 townhousesmargin 18.4% · updated yesterday
Under offer
48 Miller Rd — subdivision, 4 lotsmargin 22.1% · updated last week
Prospect
7 Crown Ave — duplexmargin 9.2% — below the 12% hurdle
Passed
91 Station St — 6 townhousesmargin 16.8% · settled Mar 2026
Purchased
Speed

A listing becomes a feasibility in minutes

Drop the agent's listing or the contract of sale into the chat - AI reads the address, land price and yields into a new report, leaving the rest at defaults for you to refine.

  • Reads listings, contracts, builder's quotes and old spreadsheets
  • Sold comparables found by AI web search; council links read into the notes
  • Share links so a partner can review or edit without an account
  • PDF report for brokers, lenders and JV partners
hummingbirdventures.com
AI import — agent's listing PDF
FieldRead from the fileStatus
Address12 Acacia Street, Ringwood+ Read
Land price$1,450,000+ Read
Stamp duty (VIC)$72,050 — auto-calculated+ Read
Dwellings3 townhouses (per the plans)+ Read
Build costnot in the listingYour input
The pitch

The model becomes the investor deck

Press Create Presentation on the summary step and the live feasibility becomes a hosted deck - dark cover with the profit, cost breakdown bars, a three-scenario sensitivity table and the verdict. It stays live: refine the model and the deck regenerates until you hand-edit it.

  • Cover stats, charts and tables filled from the live model
  • Hosted on an unlisted link - no attachment, always current
  • Edit the deck like any other before the investors see it
hummingbirdventures.com
Generated deck — the cover stats, straight from the model
Total development cost$4.98m
Projected profit$918k
Margin on cost18.4%
Equity required$1.10m
Per investor$459k
Duration24 mo
Built-in AI

Just tell it what happened

Ask "what margin do I need at a $2.1m land price?", say "find 10 sold comps over $1m nearby", or drop in a listing and let the numbers read themselves in. Attach or drag in documents and the AI reads them straight into the app for your review.

What does profit look like if build costs run 10% over?
✓ At +10% construction ($2.42m total), profit falls from $918k to $698k and margin on cost from 18.4% to 13.1% - still above your 12% hurdle, but the contingency is doing all the work.
(1 file attached) The agent's listing for 12 Acacia Street.
✓ New report created - land $1.45m with $72,050 stamp duty auto-calculated, zoned for 3 townhouses. The rest is at defaults: add your build cost and expected sale prices to complete the feasibility.
Beautiful reports

A feasibility pack for banks and partners

The whole deal exports as a professional PDF - every cost line, the funding structure, returns and the assumptions behind them. Hand it to a broker, lender or JV partner and look like you have a development manager on staff.

  • Full cost breakdown from land to completion
  • Profit, margin on cost and residual land value up front
  • Assumptions documented so the numbers can be challenged
Feasibility Report — 12 Acacia St 3 townhouses · GST margin scheme
Total development cost$4.98m
Net profit$918k
Margin on cost18.4%
Residual land value$1.62m
Generated by Hummingbird · PDF · page 1 of 7
Questions

Frequently asked

I've never done a development feasibility. Can I use this?

Yes - that is who it is for. The wizard walks you through all eight steps in plain language with sensible defaults, and the AI chat answers questions like "what should I allow for soft costs?" as you go.

What is residual land value?

The most you can pay for the land and still hit your required profit margin, working backwards from end sale values through every cost. It turns an emotional auction into an arithmetic ceiling.

Does it handle the GST margin scheme and stamp duty?

Both. Stamp duty is auto-calculated for your state, and GST can be modelled under the margin scheme or in full - the difference is often the whole profit margin, so it is not optional.

Can I compare different schemes for the same site?

Yes - duplicate a report and change the scheme: three townhouses vs a subdivision, different build costs, different end values. Then tick both and compare side by side.

Where does the sales evidence come from?

Three ways: paste a listing link and the sold price, beds and land size read themselves in; let the AI web search find recently sold matches around your suburb and price range; or type rows by hand. The comps print on the report with a median line - always verify prices against the source links.

Is this a substitute for professional advice?

It is a modelling tool, not advice. It makes your assumptions explicit and your arithmetic correct - your accountant, broker and solicitor still matter, and the PDF gives them something rigorous to react to.

Is it free?

Yes - creating an account and running feasibilities is free. No card required.

The Hummingbird platform

One account. Every tool.

Private by designYour data lives in your own account - nothing is sold, shared or mined.
Works everywhereUse it in any browser or install it to your home screen like an app.
Share on your termsView-only or view-and-edit links for others - no account needed.
Your data is yoursExport everything as a CSV file or a polished PDF report any time.

Run the numbers before the auction, not after

Free account. Eight steps. The truth about the deal.

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