Gross Development Value (GDV) Explained: The Lending Anchor

What Gross Development Value Is

You’ll meet GDV as the headline number in every development appraisal: the projected total value of your scheme once it’s complete and sold, or valued, at market rates. Most development lending metrics anchor to it.

Your GDV has to be realistic, because everything hangs off it: overstate it and you end up with a loan the finished scheme can’t service or repay once the real values land.

You’re pricing a projection, not a promise, and a projection can be right about the price and still wrong about the time. Units that sell at exactly the figure in your appraisal, three months later than it assumed, stretch your cash flow just as hard as a price cut would.

How GDV Is Calculated

You calculate it from what the finished scheme sells for. On a residential development, GDV is the expected sale price per unit multiplied by the number of units, so 10 units at £350,000 gives a GDV of £3,500,000.

Your GDV is worth what a valuer says, not what your appraisal says. For finance, the lender commissions an independent Royal Institution of Chartered Surveyors (RICS) valuer and underwrites to that figure, which makes your own estimate a planning tool rather than a lending number.

A valuation that comes back under the appraisal doesn’t simply trim the loan, it moves the shortfall onto you. A £4m appraisal valued at £3.6m takes £260,000 off a 65% facility, and that £260,000 has to come out of your own cash flow before the first brick is laid.

How Lenders Use GDV

You’ll see lenders cap their exposure as a percentage of GDV, the loan-to-GDV ratio. Senior development finance reaches roughly 55 to 65%, stretch senior 70 to 75%, and a senior-plus-mezzanine stack up to about 80 to 85% in total.

At a 65% ceiling, the cap is really the lender’s safety margin: it keeps them secured even if costs overrun, the market softens, or not every unit sells at the projected price.

The cap bites whatever your costs say. Apply 65% to a £3.5m GDV and the facility tops out near £2.275m, so if total cost comes to £2.6m the missing £325,000 is yours to find from equity or mezzanine before the lender releases anything. Work that gap out first: it decides whether the scheme is fundable long before your cash flow decides whether it’s comfortable.

GDV vs Net Realisation

Keep GDV and net realisation separate in your head. GDV is gross, before sales and marketing, legal fees, agent fees and post-completion costs. Net realisation strips those out and reflects what you actually bank.

Only the net figure tells you whether the scheme is worth doing. Lenders size the loan against GDV, because the gross figure is what secures them, and that’s a different question from whether you should build the thing at all.

You can’t spend the gross figure. Agent and sales costs of 2 to 3% of GDV come off before anything reaches your cash flow, which is £70,000 to £105,000 on a £3.5m scheme, and on a thin margin that’s the difference between a profit and a year of unpaid work.

GDV for Income-Producing Schemes

You calculate GDV differently when you’re keeping the scheme rather than selling it. For a buy-to-let or build-to-rent development, GDV is the capital value of the finished income-producing asset: the net annual rent divided by the applicable market yield.

Your GDV then moves with yields, not just rents: a higher yield, reflecting more perceived risk, cuts the GDV and squeezes your cash flow on refinance, even when the rent is unchanged.

That’s the risk a build-to-rent appraisal carries and a for-sale one doesn’t: your GDV is set by a market you have no influence over, months after the rents are agreed. Push the rents as high as the market will take, by all means, but budget for the yield moving against you as well as for it moving your way.

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