What is the difference between light and heavy refurbishment finance? Where lenders draw the line.
Light refurbishment is cosmetic work with no structural change, no planning permission and no change of use, usually under 15% to 25% of the property's value: kitchens, bathrooms, rewiring, redecoration. Heavy refurbishment is anything structural, anything needing planning or building regulations sign off, extensions, loft and basement conversions and change of use. The label decides the lender, the leverage, how the works are funded and the rate.
By Dominic Whitecross, Co-Founder, HyLend. Last reviewed October 2026.
Side by side
| Light refurbishment | Heavy refurbishment | |
|---|---|---|
| Works | Cosmetic, non structural | Structural, extensions, conversions, change of use |
| Planning | None needed | Usually needed, or permitted development with prior approval |
| Works cost | Under about 15% to 25% of value | Above that, often 25% to 100% of purchase price |
| Who lends | Most bridging lenders | Specialist refurbishment and light development lenders |
| Leverage | Up to 75% of purchase price, works often from cash | Up to 70% of GDV, works funded in stages |
| Works funding | Day one loan only, or a single works tranche | Drawn in arrears against monitoring surveyor sign off |
| Rate, 2026 | From 0.69% to 0.85% a month | From 0.85% to 1.1% a month plus monitoring fees |
| Term | 6 to 12 months | 12 to 24 months |
| Exit | Sale or buy to let refinance | Sale, refinance, or onward development facility |
Why the label matters more than the rate
The lender treats a light refurbishment as a bridging loan on a property that happens to be getting some work: the loan is sized on the purchase price, the works are often funded from your own cash, and underwriting is quick because nothing about the building's value depends on the project finishing.
A heavy refurbishment is underwritten as a small development. The lender sizes on the end value, releases works money in tranches against a monitoring surveyor's visits, and wants a schedule of works, a contractor, a build cost breakdown and sometimes a contingency. That costs time and fees, but it also means the lender funds the works rather than you. On a £450,000 purchase with £120,000 of structural works, that is the difference between needing £230,000 of cash and needing £150,000. Run the numbers on the free refurbishment appraisal →
The grey area, and how lenders decide
Most arguments are about projects that sit in the middle: a loft conversion under permitted development, a full rewire and replumb with a new roof, a two bed to three bed reconfiguration without extending. Lenders decide on three tests: is anything structural moving, is planning or building control involved, and will the property be uninhabitable at any point. One yes usually makes it heavy. Some lenders run a middle tier called medium refurbishment for exactly these cases, with works up to about 50% of value, drawn in one or two tranches.
Getting the label right before you apply matters because a case submitted as light and reclassified as heavy at valuation restarts the process with a different lender, which on a 28 day auction purchase is fatal. The full refurbishment finance guide →
Which one is right for your project
If the works are under 20% of value, cosmetic, and you can fund them from cash, apply as a light refurbishment bridge: cheaper, faster, and the exit onto a buy to let mortgage is straightforward. If the works are structural or over 25% of value, or you need the lender to fund them, apply as heavy from the start and have the schedule of works and contractor quotes ready; the extra fees are smaller than the cost of a reclassification. If you are not sure, send us the schedule of works and we will tell you which lenders will treat it as which.
How we place it
We run the schedule of works past the lenders' own definitions before anything is submitted, so the case goes to a lender that will treat it as light if it is light, and to one that funds the works if it is heavy. The wrong label is the most common reason a refurbishment bridge fails late.
Send the basics
Asset, amount, timeline and exit. Lender backed indicative terms within 24 hours, tested across the whole market rather than a single panel.
Send the basics → or call 07310 008347, or WhatsApp +44 7741 434395.
Light vs heavy refurbishment: FAQs
What counts as light refurbishment for a bridging loan?
Cosmetic work with no structural change, no planning permission and no change of use, typically costing under 15% to 25% of the property's value: kitchens, bathrooms, flooring, decoration, rewiring, a new boiler. The property usually stays habitable.
What counts as heavy refurbishment?
Structural alterations, extensions, loft and basement conversions, change of use, anything needing planning permission or building regulations approval, and projects where works cost more than about 25% of value. Lenders fund these in stages against a monitoring surveyor.
Is heavy refurbishment finance more expensive?
Yes, by about 0.15% to 0.3% a month in 2026, plus monitoring surveyor fees per visit. Against that, the lender funds the works, which usually matters more to the cash you need than the rate does.
Can I get a light refurbishment bridge on a property I cannot live in?
Sometimes. If it is uninhabitable because of condition rather than works, some lenders will still treat the case as light; others move it to heavy. It depends on why it is uninhabitable and how long for.
Do I need planning permission before applying for heavy refurbishment finance?
Usually yes, or a clear permitted development route. Most heavy refurbishment lenders will not release works funds without the consent in place, though some will complete the purchase on a bridge while planning is obtained.