Estimate Gross Development Value using proposed houses, apartments, average sale values and affordable housing assumptions. This early-stage tool helps landowners, developers and planning teams understand the top-line value of a residential scheme.
This calculator estimates sales-based GDV only. It is not a valuation, residual appraisal or viability assessment. It does not include land cost, build costs, finance, developer profit, abnormal costs, CIL, Section 106 or professional fees.
GDV stands for Gross Development Value. In simple terms, it is the estimated total value of a completed development before deducting costs. For residential development, it usually starts with the expected sale value of the finished homes.
For mixed schemes, each unit type should be calculated separately, then added together.
Affordable housing can reduce the blended GDV because affordable units are often valued differently from private sale homes. This calculator applies a simple affordable housing percentage and discount to create a more realistic early estimate.
GDV is the estimated completed value of the scheme. It does not show whether the project is profitable, viable or what the land is worth.
A residual land value appraisal normally deducts build costs, fees, finance, planning obligations, contingency and developer profit from GDV to estimate what may be available for land.
GDV is only the top-line value. A proper appraisal should test construction costs, finance, fees, affordable housing, abnormal costs, profit and residual land value.
GDV means Gross Development Value. It is the estimated total value of a completed development before deducting development costs.
For housing, GDV is usually calculated by multiplying the number of completed homes by their estimated sale values, then adding the values together across the whole scheme.
No. GDV is the estimated completed value before costs. Profit is what remains after deducting land, build costs, fees, finance, sales costs, obligations and other development costs.
It can reduce blended GDV because affordable homes may be valued below private sale values. The actual impact depends on tenure, policy, transfer values and local agreement.
Many early appraisals test developer profit as a percentage of GDV, often around 15–20%, although the right allowance depends on risk, funding, tenure, delivery route and market conditions.
No. Land value requires a development appraisal that considers GDV, costs, profit, risk, planning status and local market evidence.
Residual land value is the amount left for land after deducting development costs, finance, planning obligations, contingency and target profit from the GDV.
Sold price evidence is usually more reliable than asking prices. For a professional appraisal, comparable evidence should be checked by location, size, type, specification and date.
The next step is usually a feasibility appraisal, which tests whether the scheme remains viable after build costs, fees, finance, obligations, profit and land value are considered.
