Development finance is not a single product. The line between light refurbishment, heavy refurbishment, and ground-up development finance matters because it determines the loan product, the loan-to-value, the professional team you need, and whether a Quantity Surveyor must sign off every drawdown. Many developers first encounter specialist property finance on a refurbishment project — and the lender logic they encounter here sets the template for everything that follows.
This guide covers how lenders define and price the three tiers of refurbishment and conversion finance, what they look for before they lend, and how a refurbishment track record feeds into your next development loan.
Light refurbishment finance: cosmetic works, single tranche
Light refurbishment finance covers cosmetic and non-structural works on a property that is habitable at purchase. No planning permission is required; the works do not trigger Building Regulations sign-off. Typical scope: kitchen and bathroom replacement, EPC upgrades (insulation, new heating systems), redecoration, windows and doors, landscaping.
The common borrower is an experienced BTL investor, a portfolio landlord adding value, or an HMO converter doing a light upgrade. The risk profile is low — the property is liveable throughout, the works are predictable in cost, and the exit (sale or remortgage) is well-supported by comparables. Lenders reflect this in the structure: light refurb facilities often complete in a single drawdown at purchase, with no staged monitoring.
Typical LTVs run at 70–75% of post-works GDV. Terms are short — six to eighteen months — because the exit is close. Most lenders offer rolled interest (added to the loan rather than serviced monthly), which suits investors who are not drawing income from the property during works.
Heavy refurbishment finance: structural works and the planning trigger
Heavy refurbishment finance applies where works are structural, where the property is uninhabitable at purchase, or where planning permission or Building Regulations approval is required. Extensions, loft conversions, basement excavations, full gutting, significant changes to internal layout, and conversions from one residential use to another (for example, converting a large house into flats) all fall into this category.
The defining test is uninhabitability at purchase and the involvement of a local authority — either through a planning permission or Building Control. Once either applies, most lenders move the loan into their heavy refurbishment or development finance category, with the stricter underwriting that implies.
LTVs typically sit at 65–75% of GDV, sometimes reaching 80% for borrowers with a verified track record. Terms run from twelve to twenty-four months. Staged drawdowns are standard — funds are released in tranches as works progress, with a Quantity Surveyor (QS) required for most lenders where gross development costs exceed approximately £250,000. The QS inspects on site, confirms works are complete to standard, and authorises the next drawdown. This is not a bureaucratic formality: the QS protects the lender against paying for works that have not been done, and a slow QS sign-off is the most common cause of drawdown delays.
Contingency is non-negotiable on heavy refurbishment. Lenders typically require 10–15% built into the schedule of works. A developer who prices a heavy refurb without contingency will either be declined or required to revise their cost schedule before credit approval.
Change-of-use and conversion finance: the planning route determines the product
Conversion finance sits between heavy refurbishment and development finance, and the planning route is what determines which product applies. The clearest example is commercial-to-residential conversion.
Labour's August 2025 planning reforms extended and clarified Permitted Development Rights for office-to-residential conversions under Class MA, making this one of the fastest-growing segments of the refurbishment finance market in 2026. Where a conversion proceeds under Prior Approval rather than full planning — retaining the structural shell and converting internal layouts — specialist lenders treat it as heavy refurbishment. Where a conversion involves substantial demolition, extends the footprint, or triggers a full planning application, lenders move to development finance criteria.
GDV is harder to value on conversions. A commercial building converting to residential does not have a ready stream of residential comparable sales from the same address, and valuers lean heavily on equivalent recent transactions in the immediate area. Lenders are sensitive to this: a scheme where the GDV relies on ambitious comparables in a thin market will be underwritten more cautiously. Bring comparable evidence early and present it clearly.
Lender appetite for conversions is also highly experience-sensitive. A lender who is comfortable financing an experienced converter on a 12-unit office-to-residential scheme may decline the same scheme for a first-time borrower, not because the scheme is unviable but because the execution risk is materially higher without a track record. The two key risks lenders price on conversions are planning risk (Prior Approval may come with conditions that affect the scheme) and unknown structural or utilities costs that only become visible when the building is opened up.
What lenders ask before they lend on a refurbishment
Exit strategy. How does the lender get repaid? Sale at completion is the cleanest exit, supported by comparable sales evidence at or above the stated GDV. Refinance to a BTL or HMO mortgage is common on smaller schemes but requires the refinance lender's criteria to be met — stress-test the rental income assumptions before you present this as the exit. Retain and remortgage against the improved value is the third route, and lenders will want to see the post-works value supported by the same GDV evidence.
Planning certainty. Full planning permission in place before drawdown is the cleanest position. Prior Approval (granted) is accepted by most specialist lenders on conversions. An unresolved planning application is a risk: some lenders will agree heads of terms subject to planning but will not commit until it is granted; others will not engage at all until planning is in place. Factor the planning programme into your timeline — a scheme contingent on a four-month planning determination has a different risk profile than one with a consented scheme.
Schedule of works. A detailed, costed schedule of works is the single document most likely to cause a delay if missing or vague. Lenders and their QS reviewers need a line-by-line breakdown of what is being done, by whom, and at what cost. Unsigned or unsigned-off schedules, schedules without contingency, and schedules based on verbal quotes from contractors rather than fixed or agreed prices are common reasons for requests for information that add weeks to a credit process.
GDV evidence. Three to five comparable completed sales within half a mile and the last twelve months is the baseline. Where comparables are thin, a professional RICS valuation from a surveyor with local knowledge of the target market will carry more weight than an automated desktop valuation. The GDV is the number the loan is sized against — if the lender's surveyor shaves 10% off your GDV, your maximum loan falls with it.
Borrower track record. Experience reduces the risk premium lenders apply. A developer who has completed three similar projects, on time and within budget, and has documented proof (professional references, company accounts, schedule of completed works) will access a wider range of lenders and better pricing than a first-timer on the same scheme. If you are financing your first heavy refurbishment or conversion, focus the narrative on your professional team — the contractor, project manager, and QS — rather than personal experience you do not yet have.
What it costs: rates, fees, and drawdown structure
Interest rates on refurbishment finance are not fixed products — they are negotiated based on scheme type, LTV, borrower experience, and lender appetite at the time. As indicative ranges at mid-2026: light refurbishment finance is typically available from 0.65–1.0% per month; heavy refurbishment and conversion finance from 0.75–1.2% per month. These are indicative ranges only — specific pricing depends on the scheme and lender relationship, and rates can sit outside these ranges in either direction.
Arrangement fees typically run at 1–2% of the loan. Some lenders charge an exit fee of 0.5–1% on completion; others do not. Interest is most commonly rolled (added to the loan balance and repaid on exit) rather than serviced monthly, which suits developers who are not generating income from the property during the works period. Retained interest (held back from the drawdown and released on exit) is also available on some facilities, particularly at lower LTVs.
The drawdown structure follows the works. Light refurbishment: typically a single drawdown at completion of purchase. Heavy refurbishment and conversion: staged drawdowns, each requiring a QS sign-off confirming works are complete to the agreed standard. Build in time for QS inspections in your programme — they are usually completed within a week of notification, but delays happen, particularly if works are not ready for inspection when the QS visits.
The refurb-to-development pipeline: how track record compounds
Most experienced ground-up developers started on refurbishment. The track record built on refurbishment projects — cost control, programme adherence, quality of finish, exit at or above GDV — is precisely what development finance lenders look for when underwriting a first ground-up scheme.
When presenting a refurbishment track record to a development lender, the relevant evidence is: original budget versus final cost, original programme versus actual completion date, final sale price or refinance value versus the GDV presented to the lender at the time of borrowing, and the quality of the professional team used. A developer who has completed four refurbishments with documented out-turn data is in a materially different position than one who can describe four completions but cannot produce the numbers.
The other transition point worth planning is the exit from a refurbishment project into the next scheme. If you are retaining a completed refurbishment as an investment property, a development exit bridge against the completed value can fund the next project's deposit while you arrange longer-term refinancing. If you are selling, the sale proceeds fund the equity contribution to your next scheme. Either route works — the key is to have the plan in place before the refurbishment completes, not after.
What to do next
Refurbishment finance — whether light cosmetic works or a full structural conversion — requires a lender familiar with the product. A bridging lender will often not have the monitoring capability for a staged heavy refurb drawdown; a ground-up development lender may not have appetite for smaller conversion schemes. The right lender depends on the scope of works, the planning position, the term, and your track record.
We work across both refurbishment and development finance and can advise on the right product and lender for your scheme at an early stage — before you have committed to a land price built on the wrong finance assumptions. Tell us about your project and we'll give you a clear picture of what finance is available.