How developers and valuers work out what a development site is worth on the Gold Coast and in South East Queensland – the residual land value method, step by step, and what moves the number.
A development site is valued by working backwards from the finished project. Developers estimate what the completed lots, townhouses or apartments will sell for, then subtract construction, consultants, approvals, infrastructure charges, finance, holding costs and their profit margin. What is left is the most they can pay for the land today – the residual land value – and it is checked against recent sales of comparable development sites.
A house is usually valued by comparing it with similar houses that have sold nearby. A development site is different. A developer is not buying the house on the block; it is buying the right to build something else there – a subdivision, a row of townhouses or an apartment building. So the question a developer asks is not “what is this property worth as it stands?” but “what can I build here, what will it sell for, and what will it cost me to get there?”
That is why two blocks of the same size in the same street can be worth very different amounts, and why a development site can be worth much more – or sometimes less – than the same land valued as a home. The answer comes from a feasibility study, and the core of it is the residual land value method.
The residual method works backwards from the finished project. Each line is an estimate, and every developer's assumptions are a little different, but the structure is always the same:
Because the land price is what is left over, small changes at the top have a big effect at the bottom. If end sales rise a few per cent, or building costs fall, the residual land value can rise by much more in percentage terms. The reverse is also true, which is why land values often move faster than house prices in both directions.
Yield is the number of lots or dwellings the site can realistically get approved. Many costs – the road connection, the sewer extension, the application, the consultants – are similar whether a project has eight homes or twelve, so every extra approved dwelling spreads those costs further and lifts what the developer can pay. Yield comes from the zone and the planning scheme's codes, the overlays, the site's size, frontage and shape, and the slope – the same factors covered in what developers look for in a site.
On the Gold Coast the City Plan is the planning scheme, and your zone determines what uses can and cannot happen on your land. Logan, Brisbane and every other South East Queensland council has its own scheme. Where a single block is too small or narrow to deliver a good yield, combining it with neighbours can change the answer – see property amalgamation explained.
In Queensland a local government can levy infrastructure charges to cover the cost of providing trunk infrastructure, if it has a local government infrastructure plan and the development will add demand to the network. Charges are levied through an infrastructure charges notice, and an adopted charge must be no more than the maximum adopted charge set by legislation. In South East Queensland, councils set the charges for transport, stormwater, and parks and land for community facilities, while water supply and sewerage charges are set by the water distributor-retailers.
On top of the charges, the developer pays for the works to connect the site: extending sewer and water mains, upgrading the road frontage and managing stormwater. A site far from services can need expensive extensions, and that cost comes straight off the land value. Your council's infrastructure charges resolution gives the current amounts.
A residual calculation is only as good as its assumptions, so it is always tested against what developers have actually paid for similar sites nearby. Comparable sales are usually compared on a common measure – price per square metre of site area, price per approved lot, or price per dwelling the site can yield – and adjusted for differences in zoning, approvals, constraints and timing.
Used together, the two approaches give a realistic range rather than a single figure. If the residual says one thing and recent sales say another, that is a sign one of the assumptions needs a closer look.
GST can change what a developer can afford. If the seller is registered, or required to be registered, for GST, the sale of development land may be taxable. In some cases the parties can use the margin scheme to work out the GST payable, but the ATO requires a written agreement to use the margin scheme before settlement, and it cannot be used in some situations, for example where the property was bought as fully taxable without the margin scheme. This is general information only: talk to your accountant before the contract is signed.
If a bank, court, tax adviser or family law matter needs the figure, you need a formal valuation from a registered valuer. If you are deciding whether and how to sell, a development site appraisal from an agent who sells development land is the faster and free first step: it tests yield and value against current development-land sales and tells you which developers are likely to be interested. Our guide to how to sell a development site explains what happens next.
GC Prestige specialises in development sites, amalgamations and off-market land sales across the Gold Coast, Logan, Brisbane and the rest of South East Queensland, and our managing director, Oktay Vali, has settled more than $200 million in property transactions. For every development site appraisal we review the zoning, overlays, servicing and likely yield, test the residual against recent development-land sales, and give you a realistic range and the best way to take the site to market.
How much your development site is worth depends on what a developer can build on it and sell. Start with the yield the zoning allows, estimate the end sales, subtract every cost and a profit margin, then test that residual land value against recent development-site sales nearby. A free GC Prestige development site appraisal does this for you.
Development sites are valued mainly with the residual land value method – end sales less construction, fees, infrastructure charges, finance, holding costs and profit – cross-checked against comparable sales of similar sites. Valuers often use both and reconcile them into a range.
A development site appraisal is an agent's opinion of the likely selling price, based on current development-land sales and developer demand, and is usually free. A formal development site valuation is prepared by a registered valuer for a lender, court, tax adviser or family law matter.
They may assume different yields, products, building costs, sale prices or profit margins. A developer who can approve more homes, or sell them for more, can afford to pay more for the same land.
It can be, because an approval removes planning risk and saves the buyer time. Whether it adds more than it costs depends on the site, the approval and the market at the time.
Infrastructure charges are levied by a Queensland council, through an infrastructure charges notice, to cover trunk infrastructure such as transport, stormwater and parks. In South East Queensland, water and sewerage charges are set by the water distributor-retailers. The developer pays them, so they come off what it can pay for land.
Yes, it can. GST on the finished sales and on the land purchase changes the feasibility. If the margin scheme is to be used, the ATO requires a written agreement before settlement, so raise GST with your accountant before you sign.
Yes. A written appraisal of your development site or commercial property is free and comes with no obligation.
General information only, current at 10 November 2026. This guide is not legal, financial, tax or valuation advice. Rules and costs change, so check the official sources above and get advice from a registered valuer, solicitor, accountant or town planner for your situation. Updated 10 November 2026 by GC Prestige, 1300 937 981.