How Much Money Do You Actually Need to Develop in Perth?

The most common reason people never start a development isn’t zoning, builders or approvals. It’s that nobody will give them a straight answer to the first question: how much money does this actually take?

The straight answer is: it depends on the project, but the cost anatomy is the same every time, and understanding it matters more than any single number. Below is the full list of where money goes in a Perth development, and how to think about the capital you need.

The cost anatomy of a development

A feasibility that deserves the name prices every one of these lines before you commit:

1. Land. The obvious one, but priced from your feasibility backwards, not from the listing forwards. The discipline runs: end values, minus all costs and margin, equals the most you can pay for land. Pay more and you’ve spent your profit at the front gate.

2. Stamp duty and acquisition costs. Transfer duty on the land, settlement fees, due diligence. Real money, routinely forgotten in beer-coaster feasibilities.

3. Subdivision and headworks. If you’re creating lots: survey and WAPC process costs, plus service headworks (water, sewer, power connection charges). These vary block by block, which is why checking services early matters so much.

4. Consultants. Surveyor, town planner, structural and civil engineering where needed, settlement agent. Individually modest; collectively a real line.

5. Build cost. The big one. What matters isn’t the per-square-metre folklore. It’s a real builder’s price on real drawings, from a properly vetted builder, with thin provisional sums so the number means something.

6. Site works. Demolition, earthworks, retaining, fill. The single most under-allowed line in amateur feasibilities, and the origin of most “blowout” stories. Site works are knowable (with soil tests and a contour survey), but only if you pay to know them early.

7. Holding costs. Interest on land and construction finance, rates, insurance, for the entire project duration. A 20-month project carries 20 months of holding. Every month of delay adds more, which is why timeline discipline is a financial control, not an administrative one.

8. Selling costs. Agent commissions, marketing, settlement (if your exit is a sale).

9. GST and the margin scheme. New residential lots and dwellings sold in the course of an enterprise generally attract GST. The margin scheme can reduce it substantially when applied correctly, but eligibility has rules, and it’s a decision made with your accountant before purchase, not at sale. Getting this line wrong doesn’t shave the margin; it can erase it.

10. Contingency. A percentage of build and site costs held against the unknowns that survive good planning. If a feasibility only works with zero contingency, it doesn’t work.

Then, after all ten, margin. The project’s profit, tested conservatively. A development that returns less than a sensible margin isn’t a project; it’s unpaid risk-taking.

So what’s the capital requirement?

Lenders won’t fund the whole anatomy. Broadly, you’re covering from your own capital:

• the deposit gap on land (the portion the lender won’t lend);
• soft costs that arrive before construction finance draws down: duty, consultants, approvals, early site investigation;
• a liquidity buffer for holding costs and contingency the bank hasn’t pre-agreed to fund.

How much that totals depends on the project scale, your lending position and the finance structure, which is why the honest starting point isn’t a dollar figure from an article. It’s a feasibility on a real project shape, plus a finance conversation run in the right order. As a rule of thumb in the current market: if a project’s total cost is X, being liquid for meaningfully more than the theoretical minimum deposit is what keeps you in control when a line moves.

Two things are reliably true:

1. It’s less than the people who never ask assume. Development in Perth is not reserved for companies with cranes. Duplex and small subdivision projects are run by ordinary investors and landowners on structured finance. Landowners in particular often hold most of their capital requirement in the block itself.
2. It’s more than the people selling seminars imply. “No money down” development is a phrase that should end conversations.

What people are really asking

When people ask how much they need, they’re really asking: can I do this without betting the house? The answer depends less on your bank balance than on your process. Run the sequence properly (feasibility first, finance structured early, every line priced conservatively, contingency held) and the capital question becomes arithmetic you can see in writing before committing a dollar.

Skip the process, and no amount of capital is enough.

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Want the ten cost lines as a working document? Download the free Perth Development Feasibility Checklist, or book a 45-minute consultation and we’ll run your numbers against a real project shape. Figures discussed in any consultation are estimates, not guarantees.