Heavy refurbishment bridging loans
Heavy-refurbishment bridging is short-term finance for property that needs structural work, a change of use, a conversion or works that need planning or building regulations approval. Lenders usually fund part of the purchase on day one and release build money in stages, and they look at the finished value (GDV) as well as today’s value. Most cases are unregulated investment loans.
Last reviewed: 4 October 2026
BridgingLoans.online is an independent UK introducer operated by PASECOM GROUP LTD (company 17139327, ICO ZC117546). We do not lend and we do not advise. Nothing on this page is a quote, an MCOB illustration or an offer of credit.
What counts as heavy refurbishment?
Lenders draw a line between light and heavy works. Light refurbishment is broadly cosmetic — kitchens, bathrooms, decoration, flooring — and usually needs no planning permission; see our light refurbishment bridging loans guide. Heavy refurbishment changes the structure or the use of the building, or is large relative to its value. The line varies by lender, so describe the works plainly in the enquiry.
| Usually light | Usually heavy |
|---|---|
| New kitchen or bathroom | Structural alterations, removing load-bearing walls |
| Redecoration, flooring, minor electrics | Extensions and loft conversions |
| Replacing windows like for like | Change of use, for example commercial to residential |
| Works without planning or building regulations sign-off | Conversions into flats or a house in multiple occupation (HMO) |
| Small cost relative to value | Works costing a large share of the property’s value |
How are heavy refurbishment loans structured?
Day one usually covers a percentage of the current value, to complete the purchase. Build costs are then released in stages, often in arrears, after an independent monitoring surveyor confirms the work. The total facility, including fees and interest, is often capped as a percentage of the gross development value (GDV) — the expected value once the works are finished — and the day-one advance is usually more conservative than on a standard purchase.
Because the property may be empty and producing no income during the works, interest is commonly retained or rolled up. Undrawn build funds may not attract interest until they are drawn — check the facility.
What do lenders want to see?
- A schedule of works with costs, ideally from a contractor, plus a contingency.
- Planning permission or permitted-development confirmation where needed, or a clear route to it.
- The borrower’s or contractor’s experience with similar projects.
- A GDV that a valuer supports, with comparable evidence.
- A realistic programme, with time for building control, certificates and any licensing.
- An exit: sale of the finished property or a refinance once it is lettable.
Worked example: the day-one advance
Suppose you buy a property for £300,000 that the valuer agrees is worth £300,000 as it stands, and you need £180,000 on day one for 12 months, using this site’s teaching defaults. Build funding would come on top, in stages.
| Line | Amount |
|---|---|
| Day-one value (as bought) | £300,000 |
| Net funds needed | £180,000 |
| Arrangement fee (2% of net, added to the loan) | £3,600 |
| Interest base (net + fee) | £183,600 |
| Monthly interest at 0.85% | £1,560.60 |
| Total interest (12 months, simple retained) | £18,727.20 |
| Gross facility | £202,327.20 |
| Net LTV | 60.0% |
| Gross LTV | 67.4% |
| Total cost of credit (fee + interest) | £22,327.20 |
Indicative educational example using this site’s calculator method: fee = net × 2%; interest = (net + fee) × 0.85% × months; gross = net + fee + interest. The 0.85% a month and 2% fee are teaching defaults, not our rates and not a quote. Valuation, legal and broker costs are not included.
The day-one gross LTV is already 67.4% before a single build tranche is drawn, so build costs have to be supported by the uplift to GDV. If the finished value is £450,000 and the lender caps total borrowing at, say, 70% of GDV, the overall ceiling would be £315,000 — leaving about £112,672.80 of headroom for build tranches and their interest. Those caps are illustrations, not a lender’s criteria. Model the purchase element in the calculator.
Which costs sit outside the loan?
Expect to pay for the valuation (sometimes including a GDV assessment), both sets of legal fees, the monitoring surveyor’s initial report and each stage visit, planning or building-control fees, professional fees for architects or engineers, insurance for a property under works, and any licensing for HMOs. Some of these are due before the first build tranche. The full fee stack is in bridging loan costs and fees.
Commercial-to-residential conversions under permitted development, HMO conversions, splitting a house into flats, structural repairs that make an unmortgageable house mortgageable, and works to improve energy performance before a buy-to-let refinance. Exits are usually a sale once finished or a refinance once let. Related: self-build, commercial bridging and development exit finance.
What goes wrong most often?
Costs overrun, works take longer than planned, and the finished value comes in below the appraisal. Any of those can leave the facility short or the exit late. Keep a contingency outside the facility, build time into the term for certificates and lettings, and tell the lender early if the programme slips. Read exit strategies before you commit.
Is this regulated or unregulated bridging?
Occupancy is the legal dividing line. If you or a close family member live in, or will live in, the property as a home (the usual test is at least 40% of it), the loan is likely to be a regulated mortgage contract, with affordability checks, consumer protections and usually a maximum 12-month term. BridgingLoans.online is an introducer, not an FCA-authorised broker and not a lender: where occupancy is yes, we pass a complete pack to an FCA-regulated broker, who explains the protections that apply. Investment, commercial, vacant buy-to-let, land and many company or SPV files are often unregulated. Either way the figures here are indicative only and this is not advice or a product recommendation. See regulated bridging and unregulated bridging.
Your home or property may be repossessed if you do not keep up repayments on a mortgage or other debt secured on it.
Indicative estimate only. Not a quote, illustration under MCOB, or offer of credit. BridgingLoans.online is a trading name of PASECOM GROUP LTD (company 17139327, ICO ZC117546), an introducer, not a lender. Email hello@bridgingloans.online.
Last reviewed: 4 October 2026.
FAQs
What is the difference between light and heavy refurbishment?
Light works are broadly cosmetic and need no planning. Heavy works change the structure or use, need planning or building regulations approval, or are large relative to the property’s value. Each lender draws the line slightly differently.
Do I need planning permission before I apply?
Not always for the purchase. Build-cost tranches that depend on planning are often held back until permission is granted.
What is a monitoring surveyor?
An independent surveyor who checks progress before each build drawdown. Their fees are usually paid by the borrower.
Is interest charged on undrawn build costs?
Often only on amounts drawn, but terms vary. Read the facility carefully.
Is heavy refurbishment the same as self-build?
Related but not identical. Heavy refurbishment works on an existing building; ground-up or multi-unit schemes may need development finance.
Next step
Use the calculator for an indicative starting point, then enquire if you want an introduction.