Mortgage retention on a valuation: what it means and what to do
A retention means your lender will lend, but not all of it yet. Part of the mortgage is held back until named repairs are done. It isn’t the end of the purchase, but it is a cash-flow problem you have to solve before completion. I’m Ben Murrell, a builder for nearly 30 years. Here’s what I’d do with one.
Last updated September 2026 · England and Wales
What a retention actually is
When you apply for a mortgage, the lender instructs a valuation to check the house is good security for the loan. If the valuer thinks the property would be worth the price once essential repairs are done, the lender can offer the mortgage with a sum “retained” until those repairs are finished ( Finder, How mortgage retention works).
The catch is simple. You still have to hand over the full price on completion day. If £10,000 of your mortgage is retained, you need to find that £10,000 yourself, then do the works, then claim it back once the lender is satisfied.
Don’t confuse a valuation with a survey. Nationwide notes that its valuation may be done by an automated model or on a desktop and that you won’t get a copy (Nationwide). MoneyHelper says a valuation won’t identify the repairs or maintenance a house needs (MoneyHelper). A retention tells you the valuer saw something. Your own RICS survey tells you about the condition.
How worried should you be?
It depends on what the works are, not on the size of the number.
- A clear, defined job (re-cover a flat roof, replace a failed chimney, rewire): usually fine to plan around once you have a real price.
- A vague condition (“investigate damp”, “structural report required”): treat it as an unknown until a specialist has looked.
- Anything touching movement, the roof structure or spray foam: check the lender will still proceed at all, not just release the retention later.
What to ask your lender (through your broker)
- Exactly which works are required, in writing. The wording on the offer is what you’ll be held to.
- What evidence releases the money: invoices, certificates (for example an electrical certificate), photos, or a re-inspection.
- Whether there is a deadline for the works, and whether a re-inspection is charged.
- Whether independent quotes showing the work is booked could reduce or remove the retention. Finder notes some lenders will consider this.
And ask your surveyor whether your own RICS survey picked up the same issue, and what else they’d want investigated.
Your options
| Option | When it works | Watch out for |
|---|---|---|
| Renegotiate the price | The works are real and the seller wants a quick sale | The seller can refuse. Bring a costed list, not just the retention letter. |
| Seller does the works before completion | Defined jobs with a clear finish (roof, rewire) | Quality. Ask for certificates, invoices and guarantees, and let your conveyancer write it in. |
| Fund the gap yourself | You have savings on top of your deposit | You pay for the works too, then wait for the release. |
| Bridging finance | Short-term gap you can repay once the retention is released | Cost. Take regulated advice from your broker. |
| Make a case to the lender | You have quotes and a start date | Slow, and not guaranteed. |
| Walk away | You can’t close the gap before exchange | You lose costs spent so far. |
The HomeOwners Alliance points out that delays while further investigations are done can leave a mortgage offer close to expiry (HOA), so start pricing the works the day the retention appears.
If you’re weighing up whether to carry on at all, read should I pull out after a bad survey? For rough figures on common jobs, the RICS survey repair cost calculator gives our typical 2026 builder ranges.
Retention, down-valuation or refusal?
- Retention: full loan approved, part held back until the works are done.
- Down-valuation: the lender values the house below your price and lends less. That’s a price conversation, not a repair one. Your broker is the right person here.
- Refusal: the lender won’t lend on the property as it stands. Ask your broker whether another lender takes a different view.
Frequently asked questions
What is a mortgage retention?
A mortgage retention is when the lender approves your mortgage but holds back part of the money until specified repairs are carried out and evidenced. It is most common when the lender’s valuation finds structural or other essential defects. You still have to pay the full price at completion, so the retained amount must come from elsewhere in the meantime.
Can I still buy a house with a mortgage retention?
Often, yes. Buyers usually renegotiate the price, ask the seller to do the works before completion, fund the gap from savings or short-term borrowing, or present quotes to the lender. If none of those works before exchange, you can still withdraw, although you will lose the costs you have already spent.
Is the retention amount what the repairs will cost?
Not necessarily. The retained sum reflects the lender’s view of the value at risk, not a contractor’s price. Get the named works priced by a builder or specialist, because the real cost can be higher or lower than the retention.
Is a mortgage valuation the same as a survey?
No. A mortgage valuation is carried out for the lender to check the property is adequate security. RICS describes it as a brief inspection, usually under 20 minutes, and some lenders use desktop or automated valuations. It is not a report on condition. Your own RICS Level 2 or Level 3 survey is.
Does Chat to Your Builder quote for the retention works?
No. We review your RICS survey and the works the lender has named, and give realistic cost ranges and next steps. We never quote for or carry out the work.
Sources
Free tools that go with this
Translate the report, price the findings, and work out what the whole purchase costs.