GDV explained for developers: how gross development value is set

What gross development value actually is

Gross development value is the whole open market sum a finished development should realise once it is complete and sold. Written as GDV, it is the top line of every development appraisal, the figure a developer, a lender and a valuer all work back from. The word gross is doing real work. Land, build costs, professional fees, finance and profit are all deducted from GDV lower down the appraisal, which is why the number at the top always looks far larger than the cash a developer eventually keeps.

The distinction that trips up first-time developers is authorship. A GDV in your feasibility spreadsheet is your opinion of value. The GDV that matters to a funder is the one a RICS Registered Valuer signs off, assessed as market value on RICS Red Book terms, the global valuation standards issued by the Royal Institution of Chartered Surveyors. Those two numbers are often close on a well-researched scheme and far apart on an optimistic one. When we structure a facility we read the appraisal the way a funder does, anchoring to the number the valuer will support rather than the marketing figure.

How a valuer builds your GDV from the ground up

A valuer does not accept a single headline figure. They rebuild GDV from the parts, unit by unit, using the comparable method. That means measuring each unit accurately, finding recent sales of genuinely similar completed property nearby, adjusting those comparables for differences in size, floor level, aspect and specification, and only then applying a value to each unit in your scheme. The aggregate of those individual unit values is your gross development value.

1. Measure each unit by gross internal area, in square feet or square metres, and record the total.
2. Gather transacted comparables: recent sales of similar finished homes in the same location, not asking prices.
3. Adjust each comparable up or down for size, floor level, outlook, parking and finish.
4. Set a value per unit, or a rate per square foot, across every part of the scheme.
5. Sum the unit values to reach the aggregate GDV, then sense-check it against the local ceiling price.

Two adjustments catch developers out. The first is the new-build premium. Buyers will sometimes pay more for a brand new home than for a lived-in one nearby, but a cautious valuer allows only a modest premium and needs new-build comparables to justify even that. The second is sales incentives. If units are sold with a paid deposit, free flooring or stamp duty contributions, the valuer strips that value back out, because the headline price overstates true open market value. A GDV built on gross headline prices and a generous premium is the most common reason a developer's own figure sits above the valuer's.

GDV by scheme type: houses, flats and build to rent

How GDV is assembled depends on what you are building, and the method changes the risk sitting behind the number. There are three broad cases, and a developer should know which one applies before they price the land.

• Houses are summed plot by plot. Each house is valued against comparable house sales, and the GDV is the total of the individual plot values. Because houses sell one at a time to owner-occupiers, the aggregate value and the achievable value are usually close.
• Flats are valued as units but discounted in aggregate. A block of similar flats attracts an aggregation discount, because selling twenty near-identical flats at once floods a thin local market. The valuer may give both a gross aggregate value and a lower single-transaction or bulk figure.
• Build to rent is valued on yield, not on unit sales. A block held and let is valued by capitalising its stabilised net rental income at an investment yield drawn from comparable block sales, so a small movement in yield moves the GDV sharply.

A worked illustration shows the aggregation point. Twenty flats each valued at 250,000 pounds give a gross aggregate GDV of 5 million pounds. Sold to a single investor in one line, the same block might be valued nearer 4.4 million pounds, a bulk discount of around twelve percent. If instead the block is held and let at a net income of 250,000 pounds annually and then capitalised at a yield of 5.0 percent, the value works out at 250,000 divided by 0.05, which comes to 5 million pounds. Those figures are shown for illustration only and are not a finance offer, yet they explain why the exit route you choose changes the number a valuer puts on the same bricks.

How GDV drives residual land value and everything upstream

GDV sits at the top of the appraisal, so almost every other figure is derived from it. The residual method takes the gross development value, subtracts the gross development cost of delivering the scheme and the profit the developer requires, and leaves the residual land value: the most you can pay for the site and still hit your target return. Change the GDV and the land value moves further, because the land is what absorbs the swing.

The arithmetic makes the sensitivity plain. Take a scheme with a GDV of 5 million pounds, a gross development cost of 3.2 million pounds and a required profit of 800,000 pounds. The residual land value is 5 million less 3.2 million less 800,000, which leaves 1 million pounds for the site. Now shave the GDV by five percent to 4.75 million pounds and hold the costs and profit steady. The residual land value falls to 750,000 pounds, a twenty-five percent cut in what you can pay for the land off a five percent move in value. That leverage is exactly why an overstated GDV at the land-buying stage quietly overpays for the site, and why the same overstatement resurfaces painfully at the valuation stage. These figures are illustrative only.

The ways developers overstate GDV, and how valuation catches it

Overstated GDV is rarely dishonest. It usually creeps in through optimism at the feasibility stage and then hardens into a business plan. The problem is that the valuer works from the same evidence base every time, so the gap between an inflated figure and a supportable one shows up the moment a Red Book valuation is instructed. The common overstatements are predictable.

• Pricing off asking prices or the best single sale rather than the run of transacted comparables.
• Carrying a generous new-build premium with no new-build comparables to support it.
• Quoting gross headline prices while ignoring the sales incentives baked into them.
• Using the gross aggregate value of a flatted scheme and ignoring the aggregation discount.
• Assuming a keener investment yield on a build-to-rent block than recent block sales justify.
• Failing to allow for the ceiling price a location simply will not exceed, whatever the specification.

GDV, net development value and market value compared

Three value terms sit close together and are routinely swapped in conversation, which matters because each answers a different question. Gross development value is the finished value before any deduction. Net development value is what is left after the costs of sale come out. Market value is the wider valuation concept that GDV is a specific application of. The table sets them side by side.

The practical point for a developer is that the exit lender and the valuer talk in these precise terms even when you do not. When we place a facility we make sure the appraisal separates them cleanly, because a business plan that quotes aggregate GDV but repays out of net proceeds has a shortfall built in from the start. Holding the terms apart keeps the numbers honest all the way to completion.

How your GDV sets the size of a development exit loan

A development exit loan is the short-term facility that repays your development finance at or near practical completion and buys a calmer window, indicatively 6 to 18 months, to sell units or refinance. With the build risk now gone, it prices below the development debt it replaces, and is sized against the finished asset. The metric used for sizing is loan to GDV, shortened to LTGDV, and it expresses the facility as a percentage of the valuer's gross development value.

Notice that the percentage runs off the valuer's GDV, not the number in your feasibility model, which is why the earlier sections matter to the size of the cheque. Lenders such as LendInvest, Shawbrook, United Trust Bank, Octane Capital and Together publicly operate in this market with their own view of comparable evidence and leverage, criteria change constantly and nothing here is an offer. We arrange and place these facilities, so our job is to pair your evidenced GDV with the funder whose appetite suits the asset, the area and the sales profile.

Development Exit Property Finance acts as a broker and introducer rather than a lender, and we hold no authorisation from the Financial Conduct Authority. The exit funding we arrange is unregulated commercial lending. Every rate and leverage figure on this page is indicative and illustrative and is not an offer of finance. The figures that bind come from the valuer's assessed GDV alongside the funder's written terms, and the more solid your GDV, the more of it a funder will lend against. The full picture sits on our pillar page at /solutions/development-exit-loans/.