Gross Development Value — or GDV — is the single most important number in a development appraisal. It determines how much a lender will advance, whether your project is viable, and what your profit margin looks like. Get it right and your deal stacks up. Get it wrong and either the project doesn't get funded, or you complete a scheme only to discover the numbers never worked. This guide explains exactly what GDV is, how to calculate it accurately, and how lenders use it to set your loan limit.
Gross Development Value is the total estimated market value of a development project at completion — before any costs are deducted. It is the sum of the projected sale prices (or investment values) of every unit, plot, or space in the development. It is not the profit. It is not the revenue. It is the top line — the total end value if everything were sold or let at the projected market rate on the day of completion.
GDV is used by development lenders as the primary measure of a project's scale and viability. Their maximum loan is set as a percentage of GDV (LTGDV). Your profit margin is measured as a percentage of GDV (profit on GDV). Almost every key number in a development finance conversation flows from GDV.
The simplest case. Multiply the number of units by the average projected sale price per unit:
GDV = Number of Units × Average Sale Price Per Unit
For mixed unit types (e.g. 4 x 2-bed at £280k and 6 x 3-bed at £380k):
GDV = (4 × £280,000) + (6 × £380,000) = £1,120,000 + £2,280,000 = £3,400,000
If you're retaining the completed development as an investment rather than selling units individually, GDV is calculated as the capitalised rental value:
GDV = Annual Net Rent ÷ Investment Yield
Example: 10 apartments generating £8,000/year each = £80,000 net annual rent. At a 5% residential investment yield: GDV = £80,000 ÷ 0.05 = £1,600,000.
Calculate each component separately and sum. Residential units at sale prices + commercial space at capitalised rental value + any other elements.
GDV is the project end value. LTGDV (Loan to Gross Development Value) is the lender's maximum loan as a percentage of that end value. These are related but different numbers — and confusing them leads to miscalculated funding gaps.
| Metric | Formula | Typical Limit |
|---|---|---|
| GDV | Units × Sale Price (or Rent ÷ Yield) | N/A — it's the target |
| LTGDV (senior debt) | Loan ÷ GDV | 60%–65% |
| LTGDV (senior + mezz) | Total debt ÷ GDV | Up to 80%–85% |
| Profit on GDV | (GDV − Total Costs) ÷ GDV | Minimum 20% required |
The 20% profit on GDV threshold is not arbitrary — it reflects the risk buffer development lenders need to see between project costs and end value. If GDV falls short of projections (market softening, delayed sales, specification changes), a 20% margin provides significant protection. A project running at 10% profit on GDV has almost no buffer against adverse outcomes.
| GDV | 20% Profit on GDV | Max Allowable Costs |
|---|---|---|
| £1,000,000 | £200,000 | £800,000 |
| £2,500,000 | £500,000 | £2,000,000 |
| £5,000,000 | £1,000,000 | £4,000,000 |
| £10,000,000 | £2,000,000 | £8,000,000 |
💡 MW Capital Advisory standard: We apply a minimum 20% profit on GDV and a maximum 75% LTGDV to every development appraisal before presenting to lenders. Projects that don't meet both thresholds are restructured — not submitted as-is.
Share your GDV assumptions and cost schedule with us. We'll verify the numbers, identify the right lenders, and tell you exactly how much you can borrow and on what terms.
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