Development finance is short-term, project-based lending used to build, convert or substantially improve property, and then repay the borrowing once the work is done and the property is sold or refinanced. It is not a mortgage in the everyday sense: rather than lending against a finished home you already own, the lender is funding a project that does not yet exist in its finished form, releasing money in stages as the work progresses. This guide explains, in plain English, the main types of development finance, how lenders size and structure the funding, and the routes by which a project is repaid — so you can get your bearings before you take advice.
This page is information, not advice. It is here to help you understand the landscape, not to recommend a particular product or course of action. A development project carries real commercial, planning and construction risk, so before you commit, speak to a qualified adviser who can look at your scheme and circumstances properly. Niche Advice Limited is a mortgage and credit broker, not a lender, and is authorised and regulated by the Financial Conduct Authority.
Development finance is not regulated by the FCA. It is treated as business or commercial lending, taken out for an investment or trading purpose, so it generally falls outside the consumer protections that apply to a residential mortgage. Because development finance is unregulated, the residential repossession warning does not apply to it. That does not make it low-risk: your capital, the secured property and the project itself are all at stake if the scheme runs over budget, over time, or does not sell or refinance as planned. Borrow only on the basis of a realistic appraisal and sound professional advice.
What this guide covers
“Development finance” is an umbrella term covering several quite different situations. Below we walk through:
- Ground-up development — building new property from a bare or cleared site
- Heavy and light refurbishment — major works versus cosmetic improvement
- Conversions and permitted development — changing what a building is used for
- Self-build and custom-build — funding a home you are creating to live in
- How lenders cap the funding — loan-to-GDV and loan-to-cost, explained
- Staged drawdowns — why the money is released in tranches, not all at once
- Exit routes — how a project repays the lender at the end
Each section is short and scannable. You will not find interest rates, fees or monthly figures here, because those depend entirely on the scheme, the borrower and the lender — and they change constantly. Where a rate would normally go, the honest answer is to speak to an adviser for a current quote.
Ground-up development
Ground-up development is exactly what it sounds like: building from the ground up on a site that is currently empty, cleared, or holds something due for demolition. It is the most involved form of property development and the form lenders scrutinise most closely.
A ground-up scheme typically funds two distinct things — the land or site itself, and the cost of construction. Because nothing is generating value until the build is well underway, the lender takes a view on your plans, your team and your numbers rather than on a finished, income-producing asset. Most lenders will want planning permission already in place (or a credible route to it), a costed schedule of works, a realistic build programme, and evidence that your professional team — contractor, project manager, architect, quantity surveyor — can deliver the scheme.
Your own track record matters too: experienced developers generally find a wider field of lenders open to them, while first-time developers can still raise finance but may face a narrower choice and closer monitoring. An adviser who works with developers can help present a scheme so a lender can understand and price it.
Heavy and light refurbishment
Not every project starts from bare ground. A great deal of development finance funds the improvement of an existing building, and lenders draw an important line between two kinds of work.
Light refurbishment
Light refurbishment covers cosmetic and non-structural improvement — new kitchens and bathrooms, redecoration, re-wiring, replacing fixtures — where the building’s use and structure stay the same and no planning permission or building-regulations sign-off is needed. Because the works are quicker and lower-risk, light-refurbishment funding is often simpler and shorter than a full development facility, and some lenders treat it more like a bridging loan with a works element.
Heavy refurbishment
Heavy refurbishment involves structural or more substantial change — extensions, removing or moving walls, loft or basement conversions, or works that need planning permission or building control. This sits much closer to ground-up development in how it is assessed: the lender looks at the schedule of works, the build cost, the professional team and the projected end value, and usually releases funds in stages as the work progresses.
The distinction matters because it affects which lenders will consider the project and how the money is advanced. Where a scheme falls between the two, an adviser can help you understand how a lender is likely to categorise it.
Conversions and permitted development
Some projects do not add a new building so much as change what an existing one is — converting offices into flats, a large house into multiple units, or a commercial unit into residential. There are circumstances where certain changes of use are allowed under permitted development rights without a full planning application, though the rules are detailed and change over time.
Conversions are usually funded like heavy refurbishment or ground-up development, depending on how extensive the structural work is, and lenders will want to understand the planning position, the works involved, the end use and the projected finished value. Because the planning picture is technical, it is an area where specialist planning advice alongside finance advice is well worth having before you commit.
Self-build and custom-build
If you are creating a home for yourself to live in rather than to sell or rent, you may be looking at self-build (you organise and project-manage the build) or custom-build (a builder delivers a home to your specification). The funding is specialist and works differently from a standard residential mortgage, because the money is released as the home is constructed.
Self-build lenders advance funds in stages tied to the build, and a key practical point is when the money arrives. Some pay in arrears (after a stage is finished and valued), others in advance (at the start of a stage) — a difference that can have a real bearing on your cash flow. Because a self-build for your own occupation can fall into regulated territory, the rules differ from purely commercial development, and an adviser can explain which framework applies to your plans.
How lenders cap the funding
Development lenders do not simply lend a percentage of today’s value. Because the whole point of a project is to create value, they work to two key measures — and apply both, lending no more than the lower allows. (No figures here — the actual limits vary by lender, scheme and borrower; speak to an adviser for a current quote.)
Loan-to-cost (LTC)
Loan-to-cost measures the loan against the total cost of the project — the land plus the build costs and associated fees. Capping by loan-to-cost means the developer is expected to contribute a meaningful share themselves, so the lender is not the only party with capital at risk. The remainder you put in is, in effect, your deposit into the scheme.
Loan-to-GDV (LTGDV)
Gross development value (GDV) is the projected value of the finished project — what the completed property, or properties, are expected to be worth once the work is done. Loan-to-GDV caps the total facility as a percentage of that end value, stopping the borrowing running too close to what the finished scheme will realistically fetch and leaving a margin to absorb overruns or a softer market.
In practice a lender runs both calculations and lends the lower figure. The end value is usually established by an independent valuation, and the lender forms its own view of your costs — often with the help of a monitoring surveyor. Both measures are expressed as percentages, and you fund the balance, which is why a development project always requires the developer to commit their own capital.
Staged drawdowns
A development facility is rarely paid out in one lump. Instead the money is released through staged drawdowns — tranches advanced as the project hits agreed points, such as foundations complete, walls up, roof on, first fix, second fix and so on.
There are sound reasons for this. The lender only advances funds as real value is created on the ground, which protects both sides; it keeps interest costs down, because you are not paying on money you have not yet drawn; and it gives the lender confidence the project is progressing as planned. Each tranche is commonly signed off by the monitoring surveyor, who inspects the site and confirms the works before the next payment is made.
The practical implication is cash flow. Because funds arrive in stages — and, with arrears-based lenders, often after a stage is completed — you need to be able to fund the work up to each release point, then be reimbursed. Building a realistic cash-flow plan, with a contingency for delays and overruns, is one of the most important parts of preparing a scheme, and your adviser and professional team can help you stress-test it before you start.
Exit routes
Development finance is short-term and project-based, so from day one the lender wants to know how it will be repaid at the end. This is the exit route, and a credible exit is central to whether and how a scheme can be funded. There are two main routes.
Sale of the finished property
The most common exit is to sell the completed property, or properties, and repay the facility from the proceeds. Here the realism of your projected end value and your assumed sales timeline matter enormously: if the market is slower than hoped, or units take longer to sell, the borrowing still has to be serviced and repaid. Lenders will look hard at how achievable your sales plan is.
Refinance onto longer-term lending
The alternative is to keep the property and refinance the development facility onto a longer-term arrangement once the work is complete — a buy-to-let or commercial mortgage if you intend to let it, or a residential mortgage for a home you will live in. This route depends on the finished property qualifying for that lending, and on you meeting the relevant lender’s criteria at that point.
A common practical issue is the gap between the works finishing and a sale completing or a refinance going through. Some developers bridge that gap with a separate short-term facility (sometimes called development exit finance) to take the pressure off the original loan while they sell or refinance in an orderly way. Because the exit is so central, it is one of the first things to work through with an adviser, not the last.
A balanced view: the realities of development
Property development can be rewarding, but it is right to set the risks alongside the appeal. Build costs can run over budget; labour or materials can become harder to source; and projects routinely take longer than planned, with every extra month adding to your finance costs. The exit can disappoint — a finished property may sell more slowly, or for less, than projected, or a planned refinance may not proceed as expected. Planning, ground conditions and contractor problems can all derail a programme. And because development finance is not normally FCA-regulated, the consumer protections that surround a residential mortgage do not apply.
None of this means development is a poor idea — schemes are completed successfully every day. It simply means going in with a realistic appraisal, a tested cash-flow plan, a sensible contingency, a credible exit, and good advice behind you.
Frequently asked questions
Is development finance regulated by the FCA?
No. It is treated as business or commercial lending for an investment or trading purpose, so it sits outside the regulation that covers residential mortgages. The residential repossession warning does not apply — but the secured property, your capital and the project remain at risk if the scheme does not perform.
What is the difference between loan-to-cost and loan-to-GDV?
Loan-to-cost measures the loan against the total cost of the project (land plus build); loan-to-GDV measures it against the projected finished value. Lenders usually apply both and lend the lower of the two, so the developer always contributes their own capital.
Why is the money released in stages?
Funds are advanced in staged drawdowns as the project reaches agreed milestones, typically signed off by a monitoring surveyor. This releases money as real value is created, keeps your interest costs down, and gives the lender confidence the scheme is progressing.
What is an “exit” and why does it matter so much?
The exit is how the loan is repaid at the end — usually by selling the finished property or refinancing onto longer-term lending. Because development finance is short-term, lenders assess the credibility of your exit before they agree to fund the project at all.