Property Development Loan UK: The Valuer Sizes Your Facility, Not You

A property development loan is calculated as a percentage of gross development value. That percentage is 65 to 70 percent across our lender panel for senior debt, and it is applied to a number the developer does not control.

You submit a gross development value in your appraisal. The lender instructs a valuer, who produces their own. The valuer’s figure is the one the facility is sized on, and where the two disagree the difference lands entirely in your equity requirement. On a mid-sized scheme a 6 percent gap between the two numbers is worth well over £100,000 of cash you have to find.

Most guides to property development finance treat the valuation as an administrative step near the end. It is not. It is the moment the size of your facility is decided, and everything a developer can do to influence it has to be done before the valuer is instructed.

Can you get a loan for property development in the UK?

Yes, and the market is deeper than most first time developers assume. Clearing banks, specialist property development finance businesses, debt funds and peer to peer platforms all write development loans, and between them they fund everything from a two unit infill site to a 200 home scheme.

What you cannot get is a loan sized on what the project costs you. Property development lending is advanced against the finished value of the real estate, released in stages against a monitoring surveyor’s certificates, and repaid from sales or refinance. The developer’s income does not come into it. The company’s trading history barely does, because the borrower is usually a special purpose vehicle formed for the scheme.

That makes property development finance unusually accessible in one respect and unusually exposed in another. Accessible, because a business with no accounts can borrow several million pounds against a good scheme. Exposed, because the whole facility rests on a projected value that has to survive an independent professional’s opinion.

So the honest framing of the question is not whether you can borrow for property development. It is whether the value your scheme will produce supports the borrowing you need.

What is gross development value, and who actually decides it?

Gross development value is the total open market value of every completed unit in the scheme, aggregated. On a scheme of six townhouses expected to sell at £525,000 each, the developer’s gross development value is £3,150,000.

Three parties produce a figure and only one of them counts.

The developer produces the first, in the appraisal used to price the land and to decide whether to invest at all. It is usually based on local asking prices and an agent’s view.

The estate agent produces the second, in a marketing appraisal. Agents are not valuers, they are incentivised towards optimism, and lenders know it.

The valuer produces the third. A RICS registered valuer instructed by the lender inspects the site, reviews the drawings and specification, gathers comparable evidence, and reports a gross development value along with a current site value and often a 90 day or 180 day restricted realisation figure. That report is addressed to the lender, not to you, and it is the number your property development loan is sized against.

The valuer is also the party with liability. A valuation that proves materially wrong exposes the firm to a professional negligence claim from the lender, which is precisely why valuers report cautiously. Their incentive runs the opposite way to your agent’s, and understanding that asymmetry explains almost everything about how the process feels.

How does a valuer arrive at the GDV on your scheme?

By comparison, mostly, and by capitalisation where the property produces income.

For residential property the method is comparable sales. The valuer looks for recently completed transactions on similar units in the same location: similar size, similar specification, similar tenure, similar age. New build sales are weighted heavily where they exist. The valuer adjusts for differences, applies a rate per square foot or a per unit figure, and aggregates across your scheme.

For commercial property the method is income. Expected rent divided by a market yield gives a capital value. Here the valuer needs two assumptions rather than one, and both are contestable: what will it let for, and what yield would an investor apply. An unlet commercial unit at practical completion is a value built on assumption rather than evidence, and it is discounted for that.

Mixed use real estate is valued both ways and blended, and the residential property half of a mixed scheme is nearly always the more reliable half because comparable sales are harder to argue with than an assumed rent.

It is worth saying plainly how much this favours straightforward residential development. A scheme of houses in a location with active sales evidence is the easiest thing in property development finance to value, which is why it attracts the deepest pool of funding and the keenest pricing. Residential property with unusual attributes, a converted chapel, a single very large house, anything where the comparable set is thin, gets valued cautiously for the same reason a rare asset is hard to price: the valuer has less evidence and prices the uncertainty.

Two adjustments then run across the whole report. A new build premium may be applied where the local market pays one, or removed where it does not. And an absorption or lotting adjustment applies where the scheme is large enough that selling every unit at once would depress the price, which is why a 40 unit block is not simply 40 times the value of one flat.

The evidence base underneath all of this is transaction data. Land Registry records every completed sale in England and Wales with its price and date, and those figures are what a valuer builds from. Asking prices are not evidence. A house on the market at £560,000 that has not sold tells a valuer that £560,000 is above the market, not that it is the value.

Why do lenders discount the gross development value you submit?

Four reasons, and none of them are personal.

Optimism is systematically distributed in one direction. Across thousands of appraisals, developer submitted values run above eventual sale prices far more often than below, because the appraisal exists to justify a land purchase the developer already wants to make. Lenders have priced that pattern in.

Time is the second reason. Your units will sell in 18 to 24 months, not today. The valuer is reporting a value at completion in current market terms, and every month of that gap is uncertainty the lender carries.

Recovery is the third. If the scheme fails, the lender is selling part-built or newly completed property into whatever market exists at that moment, probably quickly. That is why valuation reports carry a restricted realisation figure alongside the gross development value, and why some lenders size against a blend rather than the headline number.

Specification risk is the fourth. Your gross development value assumes a finish level. If the cost plan does not fund that finish, the valuer will report on what the money actually buys, which is usually less.

The practical consequence is straightforward. Assume a discount of somewhere between nothing and 8 percent, model your scheme on the low end, and treat a valuation that comes in at your number as a good day rather than the expected outcome.

What happens to the facility when the valuation comes in low?

Arithmetic, immediately.

On six townhouses at a submitted gross development value of £3,150,000, a 70 percent property development loan gives a ceiling of £2,205,000. If the valuer reports £2,950,000, the same 70 percent gives £2,065,000. Your facility fell by £140,000 and your costs did not move at all.

The developer has four options and they are all worse than the original plan.

Fund the gap from equity, if the cash exists. This is the cleanest and the most painful.

Add a second layer of capital. Mezzanine finance sits behind the senior lender at around 12 percent a year and stretches the total to 85 to 90 percent of gross development value, which more than covers a £140,000 shortfall but costs real money over an 18 month term.

Challenge the valuation, which is possible and rarely successful. A valuer will reconsider on new evidence, meaning comparable transactions they did not see, not on argument. If you have three genuinely comparable Land Registry sales at higher prices within the last six months and the report missed them, submit them. If you simply disagree, you will not move the number.

Or re-tender the case to a lender whose criteria are more generous, accepting that a second valuation costs another fee and takes another three weeks.

The best option is the one taken months earlier: build the discount into the appraisal so the down valuation does not create a problem in the first place.

There is a fifth response worth naming because developers reach for it and should not. Borrowing the shortfall elsewhere, on unsecured business loans or personal credit, to make the equity look bigger than it is. Senior lenders check, a second charge behind a development facility needs the senior lender’s consent, and a developer who cannot fund a £140,000 gap from their own resources is a developer who cannot fund the first cost overrun either. Whatever you borrow to plug an equity hole is finance the scheme has to repay twice.

What evidence actually moves a valuer, and what does not?

Worth being specific, because developers spend effort on the wrong things.

Evidence that works: completed sales of genuinely comparable units, close by, recent, with Land Registry prices behind them. Reserved sales on your own scheme with exchanged contracts. A detailed specification schedule that proves the finish level. Approved drawings with accurate floor areas, because a valuer working from wrong areas produces a wrong value. A viability or planning document that establishes the unit mix.

Evidence that does not work: asking prices, agent appraisal letters, what a neighbour told you their house was worth, values from a different postcode, and comparable sales more than about a year old in a moving market.

Evidence that helps indirectly: a named contractor and a costed build programme. These do not change the gross development value, but they reduce the risk that the specification is undeliverable, which stops the valuer hedging.

The single highest value action a developer can take is to assemble the comparable evidence themselves and provide it with the submission. Valuers are not obliged to use it and good ones will verify everything independently, but a well evidenced pack means the valuer starts from the same transactions you did. Where a valuation goes badly wrong it is often because the valuer used comparables from a weaker part of the same town, and nobody had put the right ones in front of them.

How hard is it to get a property development loan approved?

The credit decision is usually the easy part. The valuation and the cost review are where cases die.

A well presented scheme with a fair gross development value, a costed build, a named contractor and a developer with some experience will get terms from several lenders inside a fortnight. The subsequent four to six weeks are valuation, monitoring surveyor appraisal and legals, and that is where the number moves.

The criteria that matter are narrow. Does the value stand up on evidence. Does the build cost match the specification. Is there a contingency, usually 10 percent on straightforward residential work. Is the planning consent clean or are there conditions that could change the scheme. Is the exit realistic. And is there real developer equity in the deal.

Note what does not decide it. Personal credit history matters far less than in consumer lending, though a serious personal adverse will narrow the panel. Your salary is irrelevant. The company’s age is irrelevant, because it is usually new. What you will sign is a personal guarantee, typically capped at 20 to 30 percent of the facility, and that personal exposure is the price of borrowing through a company with no assets.

The difficulty, in short, is evidential rather than financial. Developers who find property development finance hard are usually finding valuation hard.

Bridging loan or development loan: how does the valuation differ?

This is the clearest way to see what gross development value really is.

A bridging loan is valued on the property as it stands today. The valuer reports market value, and the lender advances up to 75 percent of it on residential security or 65 to 70 percent on commercial. There is no projection involved. Bridging loans run 1 to 18 months from 0.55 percent a month, and the whole assessment is about what exists and what will repay it.

A development loan is valued on the property as it will be. The valuer reports gross development value, and the lender advances a percentage of a number that describes buildings not yet built. The current site value is also reported, but only to size the day one land advance.

So the two products ask a valuer for fundamentally different opinions, and the difference explains the rest. Development loans need staged drawdowns because the value arrives gradually. Bridging loans do not, because the value is already there. Development lending needs a monitoring surveyor. Bridging does not. Development facilities take longer to arrange because a projected value takes longer to form an opinion on.

Where a scheme needs both, and many do, the bridging loan buys the site while the gross development value is still theoretical, and property development finance takes over once consent makes the projection credible.

Can you get 100 percent property development finance against GDV?

Not against gross development value, because the cap is defined as a percentage of it. A facility cannot be 100 percent of a number it is contractually limited to 70 percent of.

What people usually mean is 100 percent of cost, and that is a different question with a real answer. Where the site is already owned outright, your land is the equity and a facility that funds the entire build cost is ordinary. Where the site is being purchased, the stack runs senior property development finance to 65 or 70 percent of gross development value, mezzanine finance behind it to 85 or 90 percent, and equity or joint venture capital for the balance at a cost of 40 to 60 percent of the profit.

The reason this article puts the question here rather than at the front is that valuation is what makes it real. Every layer in that stack is a percentage of gross development value, so a down valuation compresses all of them at once. Developers relying on 100 percent structures are the most exposed to the valuer’s opinion, not the least, and a scheme that only works at the top of the gearing range is a scheme with no room for a bad report.

What does a lender want from the development business behind the scheme?

The valuation sizes the funding. The business decides whether a lender wants to write it at all, and developers who treat property development finance as a purely transactional product miss how much of the decision sits here.

Start with what the borrowing entity is. Almost every property development loan in the UK is written to a special purpose company holding one site. That company has no trading history, no accounts and no assets beyond the real estate, so the lender looks through it to the business and the people behind it.

They want four things from that business.

A track record, or a credible substitute. Completed schemes of similar size and type is the strongest evidence a development business can offer. Where there are none, the professional team carries it, and a named contractor with relevant completions does more for a first application than any amount of enthusiasm.

A business plan that survives questions. Not a document with a cover page, but a clear account of what you are building, who buys it, what it costs, how long it takes and what happens if it takes longer. Lenders funding development are backing a plan rather than an asset, because the asset does not exist yet.

Financial transparency across the group. If your business already holds other sites with other funding on them, expect those to be reviewed. Cross default provisions are common, and a lender assessing new funding wants to know what else could go wrong elsewhere in the business and land on this scheme.

Personal commitment from the directors. A personal guarantee, usually capped at 20 to 30 percent of the facility, plus real equity visible in a business account rather than promised from a future sale.

There is a longer game underneath this. Property development finance is a repeat business product. A developer who borrows cleanly, draws in line with the programme and repays on time becomes a materially better credit on the second scheme, and by the third the funding conversation changes character entirely. Lenders compete for a business with three delivered schemes behind it in a way they never compete for a first application. That is worth more over a decade than any single rate negotiation, and it is a good reason to treat the first facility as the start of a relationship rather than as a one off purchase of money.

How do you protect a scheme against a down valuation?

Six things, done before the valuer is instructed.

Appraise on conservative values from the start. Take the comparable evidence you can actually prove and use the middle of it rather than the top.

Assemble the comparable pack yourself, with Land Registry sale prices, dates and addresses, and submit it with the application.

Get the floor areas right on the drawings, and state whether they are gross internal or net internal, because an area error is the most common cause of a value error.

Write the specification down. A schedule of finishes tells the valuer what the money buys.

Model the downside before you commit. If your scheme survives a 5 percent haircut on gross development value and a 5 percent increase in build costs, you have a project. If it only works at your headline numbers, you have a bet.

And keep some equity uncommitted. The developers who cope with a down valuation are the ones who had not already spent every pound of their contribution on the land.

For reference on the wider cost of money while you model, the Bank of England base rate has been held at 3.75 percent since December 2025, and development margins on our lender panel start from 6.5 percent a year over each lender’s own funding cost rather than tracking base rate directly. Every figure here is indicative, varies by lender and scheme, and is never an offer of finance.

If you want a scheme tested before a valuer sees it, we arrange a property development loan across a panel of over 100 lenders and will tell you where we think the value will land. Where a down valuation leaves a gap, mezzanine finance is the usual fix. For a site purchase before consent, bridging loans are valued on today’s market instead. Where the finished real estate is being held and let, the exit is commercial mortgages.

Construction Capital is a trading name of Lenzie Consulting Ltd, registered in England and Wales, company number 08174104. We are a commercial finance broker and introducer, not a lender, and we are not authorised by the FCA. Rates and terms are indicative, vary by lender and deal, and are never an offer of finance. Written by Matt Lenzie.