Guide · 9 min read
What gross development value means, how lenders’ valuers assess it, GDV versus market value, and how loan-to-GDV caps size every layer of the capital stack.
Written by Matt Lenzie · Published 11 June 2026
Advice from
Matt Lenzie · 25+ year career banker (Bank of Scotland, Lloyds Banking Group). £300m+ of equity and debt raised for property clients.
25+ year career banker (Bank of Scotland, Lloyds Banking Group). £300m+ of equity and debt raised for property clients.
Ask a developer what their scheme is worth and they will give you one number; ask their lender and you will get a different one, and the lender's version wins. That number is GDV, gross development value, the completed sales value of the scheme, and as of June 2026 it is the figure every layer of development funding is sized against: senior debt capped at 60% to 65% of it, senior plus mezzanine at 70% to 75%, the land price derived backwards from it, and the developer's profit defined as whatever survives of it after costs. Get GDV right and the appraisal holds together. Get it £50,000 wrong on a £2.4m scheme and the facility, the equity requirement and the profit all move at once.
This guide defines GDV properly, shows the formula and a worked calculation, separates it from market value and net development value, explains how a valuer working to RICS standards actually builds the number, and then does what the glossary pages skip: shows how loan to GDV caps the whole capital stack and what happens to your facility when the lender's valuer disagrees with you.
Gross development value is the estimated open-market value of a development as if it were complete on the valuation date. The two halves of that definition both carry weight. "As if complete" means the valuer prices the finished houses, not the muddy site: a plot with consent for six houses might be worth £600,000 today and carry a GDV of £2,400,000. "On the valuation date" means at today's prices and today's demand: a valuer will not build in the 6% of house price growth the developer hopes will arrive before practical completion. If the market rises during the build, the gain belongs to the developer's profit line; no lender will advance against it, because hoped-for inflation is not security. Equally, nothing in the loan agreement protects anyone if the market falls, which is why the loan-to-GDV arithmetic later in this guide matters more than any other ratio in development finance.
GDV is gross in a specific sense: it is the sales value before deducting the costs of achieving the sales. It is not revenue minus anything. Costs of construction, finance and land all sit on the other side of the appraisal; GDV is the income side, in one figure.
For a sales-led residential scheme, the formula is simply the sum of the parts:
GDV = number of units × estimated sale price per unit, built unit by unit from sold comparable evidence.
| Unit | Type | Size | Evidenced £/sq ft | Estimated sale price |
|---|---|---|---|---|
| Plots 1-4 | 3-bed semi | 1,050 sq ft | £381 | £400,000 |
| Plots 5-6 | 4-bed detached | 1,250 sq ft | £320 | £400,000 |
| GDV | 6 units | £2,400,000 |
Three rules keep the calculation honest. Use sold prices, not asking prices: completed transactions from HM Land Registry price paid data within the last six to twelve months, because portal asking prices are sentiment and routinely sit 3% to 5% above what is achieved. Work per square foot, not per house, so differences in size between your units and the comparables are adjusted out rather than ignored. And apply a new-build premium only where local sold evidence of new stock actually shows one; valuers accept 5% to 10% where it is evidenced and strike out appraisals that need 15% to make the profit test. For rental-exit schemes, the same discipline applies through the income route: GDV is the annual rent capitalised at a market yield, so £160,000 of rent at 6.5% gives roughly £2,460,000, with the yield evidenced from investment sales, not aspiration. The Office for National Statistics UK House Price Index is the sense-check layer above the comparables: if your unit pricing implies growth the index does not show for the region, the appraisal is forecasting, not valuing.
Once GDV is set, profit follows by subtraction: GDV of £2,400,000 less total costs of £1,975,000 (land £600,000, build £1,080,000 with contingency, fees £110,000, finance £185,000) leaves £425,000, which is 21.5% profit on cost and 17.7% profit on GDV. Both pass the tests funders apply, 17.5% to 20% on cost and 15% to 17.5% on GDV. Run your own scheme through the development profit calculator to see where yours lands.
Three terms, three different numbers, and confusing them moves real money. Market value, as defined in the RICS Red Book, is the price the property would exchange for today, in its current state: for a development site, that is the land value, not the completed value. GDV is the market value the completed scheme would have today. Net development value, NDV, is GDV minus the cost of converting buildings into cash: agency fees of roughly 1% to 1.5%, sales legals of about £1,000 per unit, and on some lenders' definitions an allowance for finance during the sales period. NDV typically lands 2% to 4% below GDV.
The GDV/NDV distinction is the one that catches developers at term-sheet stage, because lenders are split on which figure their facility cap references. Sixty-five percent of a £2,400,000 GDV is £1,560,000; deduct 3% of sales costs first and 65% of the £2,328,000 NDV is £1,513,200. Identical headline percentage, £46,800 less facility, and the difference comes straight out of the cash you must find, a mechanic covered in our guide to how much deposit development finance really requires. When comparing term sheets, convert every offer to the same base before reading the percentages.
The GDV that matters is not the one in your appraisal: it is the one in the valuation report your lender commissions, prepared under the RICS Valuation Global Standards, the Red Book. The valuer re-derives GDV from scratch rather than auditing yours. For each unit type they assemble sold comparables near the site, adjust to a per-square-foot basis, weight recent transactions and strip out incentives, the deposit contributions and upgrades that make a competing scheme's headline prices overstate what buyers actually paid. They will also state a market commentary, an opinion on saleability and a reinstatement figure, and on flatted schemes they will usually report a second number: the bulk or investment value, what a single investor would pay for the whole block, commonly 10% to 20% below the sum of the individual unit values. A cautious lender sizes the facility on the bulk figure, because if the scheme has to be sold quickly it sells as a block, not as six separate dreams.
Supply context feeds the saleability view: valuers read local absorption rates against delivery, and MHCLG's house building statistics show why it matters, with new-build completions running at roughly 200,000 homes a year in England against considerable regional variation in demand. Six units in a village with no competing stock is a different sales programme from six units beside a 300-unit national housebuilder site discounting to hit a quarter-end.
Loan to GDV, LTGDV, is debt expressed as a percentage of the completed value, and it is the development lender's primary risk metric because it measures the only scenario a credit committee really prices: the scheme is finished and must be sold into whatever market exists. Every layer of the stack carries its own ceiling, and each ceiling is set against the same valuer-signed GDV:
| Stack layer | Typical LTGDV ceiling, June 2026 | Indicative pricing | On a £2.4m GDV |
|---|---|---|---|
| Senior debt | 60% to 65% | 7% to 11% pa | up to £1,560,000 |
| Stretch senior | 70% to 75% | 10% to 13% pa | up to £1,800,000 |
| Senior + mezzanine combined | 70% to 75% | mezz layer 14% to 20% pa | up to £1,800,000 |
| Equity / JV partner | the remainder to 100% of cost | 25% to 35% pa equivalent | the slice above the debt |
Because every ceiling is a percentage of GDV, the valuer's number sizes the entire structure simultaneously. A JV equity partner reads it the same way from the other end: their cash sits above the debt, so the gap between combined LTGDV and 100% of cost is the cheque they are asked to write, and the profit margin inside GDV is their downside protection, which is why JV development finance partners decline schemes below 20% profit on cost rather than negotiate on them. Model how the layers fit together on your numbers with the capital stack calculator.
Here is the mechanic that makes GDV the highest-stakes number in the file. Suppose your appraisal says £2,400,000 and the lender's valuer signs £2,350,000, a 2% difference, the kind of trim that happens every week. At a 65% LTGDV cap the facility falls from £1,560,000 to £1,527,500: £32,500 less debt. Your costs have not changed, so that £32,500 moves to the equity line you must fund. If a mezzanine layer was capped at 75% combined LTGDV, it shrinks too, by another £37,500 across the combined position. One £50,000 valuation miss has moved roughly £70,000 of funding from lenders to you, and the appraised profit has fallen £50,000 as well, from £425,000 to £375,000, dragging profit on cost from 21.5% toward 19% and closer to the threshold where funders walk. The leverage works in reverse with equal force, which is why an afternoon spent building a defensible, comparable-backed GDV is worth more than a week spent negotiating an eighth of a percent on the rate.
From the lender side of the desk, this is also why credit committees treat a developer's GDV as a claim to be tested rather than an input to be accepted. Having spent 25 years in credit roles at Bank of Scotland and Lloyds Banking Group, our founder's observation is that the committee's question is never "what does the borrower say it is worth", it is "what do we recover if we have to sell this ourselves", which is why the bulk value and the cost-to-complete figure carry more weight in committee than the headline GDV. A borrower who presents GDV the way the lender will stress it, plot-by-plot sold comparables, a stated position on the new-build premium, and their own sensitivity at GDV minus 10%, reads as someone who has already had the credit conversation with themselves, and that file moves faster.
GDV does not just size the debt: it prices the land. The residual method, the standard appraisal tool for UK development sites, works backwards from GDV. Take the completed value, deduct build costs, fees, finance and the profit the developer requires, and what is left, the residue, is the most the land is worth to that scheme:
| Residual appraisal | Amount |
|---|---|
| GDV | £2,400,000 |
| Less: build cost including contingency | £1,080,000 |
| Less: professional fees, s106, warranties | £110,000 |
| Less: finance costs | £185,000 |
| Less: required profit at 20% on cost | £400,000 |
| Maximum land bid (residual) | £625,000 |
Every pound paid for land above the residual comes directly out of the profit line, and the profit line is what every funder's viability test measures. A developer who pays £700,000 for this site has not bought a worse deal, they have bought an unfundable one: the appraisal now shows roughly 14% profit on cost, below the threshold at which senior lenders, mezzanine providers and JV partners all decline. The discipline is mechanical: let the residual set the maximum bid, and treat an agent's quoted GDV as marketing until you have rebuilt it yourself from Land Registry sold prices.
GDV stands for gross development value: the estimated open-market value of a development scheme once it is complete, assessed at today's prices on today's comparable evidence. A scheme of six houses that would each sell for £400,000 if finished today has a GDV of £2,400,000. It is the single figure from which the development facility, the residual land value and the developer's profit are all calculated.
No. Market value is what a property is worth in its current condition on the valuation date; GDV is the projected market value of the completed scheme, valued as if it were finished today. A site with planning for six houses might have a market value of £600,000 as it stands and a GDV of £2,400,000 once built out. GDV also differs from net development value (NDV), which deducts the costs of selling the units, typically 2% to 4% of GDV.
For a scheme sold unit by unit, GDV is the sum of each unit's estimated sale price: six units at £400,000 each gives a GDV of £2,400,000. Each unit price should be built from sold comparables, recent completed transactions for similar property near the site adjusted on a per-square-foot basis, not from asking prices. For schemes held for rent, GDV is derived from the rental income capitalised at a market yield: £160,000 of annual rent at a 6.5% yield implies a value of about £2,460,000.
Gross development value. In UK real estate and development finance it means the aggregate completed value of a project, and it anchors the lender's key risk metric, loan to GDV (LTGDV). As of June 2026 senior development lenders cap facilities at roughly 60% to 65% of GDV, and combined senior plus mezzanine structures top out around 70% to 75%, so every layer of the capital stack is sized from the GDV the lender's valuer signs.
UK development lenders and equity partners generally test profit two ways: profit on cost, where 17.5% to 20% is the usual minimum, and profit on GDV, where 15% to 17.5% is the common benchmark. On a £2,400,000 GDV scheme costing £1,975,000, the £425,000 profit is 21.5% on cost and 17.7% on GDV, which passes both tests. Schemes appraising materially below those levels struggle to attract senior debt, let alone mezzanine or JV equity.
Last reviewed: June 2026.
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