Every successful development begins long before the first skip arrives on site. The single most common reason projects stall isn't planning permission or a shortage of trades — it's finance. Whether you're converting a tired Victorian terrace into two flats or building four new homes on a disused garage plot, you need to know exactly how the money will work before you exchange contracts on the land.
In the UK, there's no single "developer loan". Instead, there's a spectrum of funding options, each suited to a different stage, timescale and risk profile. Understanding how they differ — and what lenders actually look at — will save you weeks of fruitless applications and, quite possibly, your deposit.
A bridging loan is short-term finance, typically arranged for three to eighteen months, designed to solve a timing problem. You've found the perfect auction lot but your existing property hasn't sold. Or you need to complete on a site quickly to beat a rival bidder. Bridging does the job, but it isn't cheap.
Expect interest rates that look startling next to a standard mortgage, plus arrangement fees, exit fees and often a monthly servicing charge or rolled-up interest. Lenders usually cap lending at around 70–75% of the property's value, and some will use the projected end value if planning permission is already in place.
Use bridging as a tool, not a strategy. It buys you time; it doesn't fund a build.
Development finance is the workhorse of small and medium-sized residential schemes. It covers land acquisition, construction costs and professional fees, with funds released in stages as the build progresses. A quantity surveyor or monitoring surveyor typically verifies each stage before the next tranche is released.
Rates are usually quoted as a margin over base, and most lenders will fund somewhere between 60% and 70% of the gross development value (GDV), or up to around 85–90% of costs if you're contributing land or equity. The loan term runs from six to twenty-four months, with interest often rolled up and repaid from sale proceeds.
The trade-off is control and cost. You'll pay arrangement fees of 1–2%, interest at 0.6–1% per month in many cases, and exit fees on top. You'll also need a detailed cost plan, planning consent, and often a personal guarantee. In exchange, you get a facility sized to the actual job rather than a speculative lump sum.
Private investors — from a well-off relative to a small syndicate of local professionals — can plug the gap that senior lenders won't touch. This is equity or mezzanine money, sitting behind the bank and taking more risk, so expect them to want more reward.
Typical structures include a fixed return of 10–20% per annum, a profit share, or a combination of both. Some investors want a legal charge over the property; others are content with a share of the SPV. Whatever the arrangement, get it drafted properly by a solicitor who understands property, and be honest about the risks. A disappointed investor is a much bigger problem than a declined application.
Underwriters aren't looking for charm. They're looking for evidence. Three things dominate every credit decision.
Experience. Have you completed a project like this before? Lenders want to see a track record — even one or two smaller schemes — with references and completion accounts. If you're new, consider partnering with someone experienced or starting with a refurbishment rather than a ground-up build. A first-timer with a straightforward two-bed renovation is a far easier credit than a first-timer with a six-unit apartment block.
Exit strategy. How does the loan get repaid? An open-market sale, a refinance onto a buy-to-let mortgage, or a pre-arranged off-plan sale all count. What doesn't count is "we'll see how the market is". Have a primary exit and a fallback, and be able to explain both in a sentence.
Projected profit. Lenders stress-test your numbers. They'll want a residual appraisal showing GDV, build costs, professional fees, contingency, finance costs and selling costs. A healthy scheme typically targets a profit on cost of 20% or more, with contingency of at least 10%. If your margin is thinner than that, expect pushback — or a demand for more equity from you.
Before you approach anyone, get your paperwork in order. A short, clear pack containing the site details, planning status, cost plan, comparable sales evidence, your CV and a cashflow forecast will do more for your application than any phone call.
Get the finance right and the rest of the project becomes a series of solvable problems. Get it wrong and you'll be selling at a discount to a buyer who can smell your deadlines. Take the time to structure it properly — your future self, standing in a finished kitchen, will thank you.
Mountjoy Developments shares practical, down-to-earth guidance on residential property development and home renovation for readers across the UK.
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