Insights
Reference material on planning capacity, land economics, statutory process and construction cost. The knowledge is governed through Buildpedia; DevPartner applies it to a specific site through a deterministic appraisal.
From the Buildpedia knowledge system
A single-point feasibility answer is a guess with decimal places. This draft shows which six variables move a development appraisal most, how to build a defensible sensitivity grid, and how to report a range without hiding behind it.
Parking is usually treated as a design output. In feasibility it is a constraint that can cut usable yield before a single plan is drawn. This draft sets out the test order, the geometry that governs, and the checks to run before you price land.
Built-up area is what you construct. Saleable area is what you sell. The gap between them is efficiency, and it changes what a site is worth. This draft defines each term, shows the conversion, and gives an audit checklist.
Additional buildable area is only valuable if the marginal revenue it unlocks exceeds the premium payment plus the construction, parking, finance and time it drags with it. This draft gives the marginal formula and the failure modes.
A JDA share percentage means nothing on its own. Its value depends on what is shared, when, on which area basis, and what happens if the project underperforms. This draft sets out a comparison method and the downside questions both sides should ask.
Residual land value is what remains of project revenue after every cost, finance charge and the developer's required return. This draft sets out the full line-by-line formula, a worked example with labelled assumptions, and the errors that inflate land bids.
FSI and FAR describe the same ratio of permitted floor area to plot area, but definitions of plot area, chargeable area and exclusions differ by state and authority. Here is the formula, the vocabulary and how to use it safely in early feasibility.
Permitted FSI is an entitlement; saleable area is an outcome. Between them sit the floor plate, core, services, setbacks and parking. This draft traces each loss, gives a measurable efficiency definition, and shows how to set a defensible assumption before design.
Approval and statutory costs are jurisdiction-specific, itemised and frequently revised. This draft gives a structure for building an auditable allowance, a per-item source discipline, and the risks of using a single blended percentage.
A fully labelled hypothetical walkthrough of a development appraisal, showing every step and every assumption. No real site, no market data, no client claims — a method you can re-run on your own inputs.
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Turn these principles into a decision on your own site — buildable area, cost, revenue, margin and a traceable verdict.