Can You Get a Mortgage on a House with Damp?
If a mortgage survey has flagged damp, or if you are selling a property and damp has been identified, you probably need answers quickly. Exchange and completion deadlines do not wait.
The short answer is: yes, you can usually get a mortgage on a house with damp, but most lenders will require the problem to be treated and evidenced before they release funds. Here is what you need to know.
What Mortgage Surveyors Flag
When a lender instructs a mortgage valuation survey, the surveyor is assessing the property on behalf of the lender, not the buyer. Their job is to identify anything that affects the value or mortgageability of the property.
Damp is one of the most commonly flagged issues. Surveyors look for:
- Visible tide marks or damp staining on walls
- Peeling paint, wallpaper, or plaster
- A musty smell
- Signs of rising damp at low level
- Evidence of penetrating damp around windows, rooflines, or external walls
- Visible mould growth
- Damaged skirting boards or floor timbers
A basic mortgage valuation is a visual inspection only. The surveyor will not lift carpets, move furniture, or carry out intrusive investigation. This means damp that is hidden may not be flagged at this stage, but anything visible will be noted.
If damp is identified, the surveyor will typically recommend a specialist damp report before the lender makes a final decision. Some lenders will retain part of the mortgage funds until treatment has been completed and evidenced.
What Mortgage Lenders Require
Lender requirements vary, but the pattern is consistent. When damp is flagged, most lenders will want one or more of the following before releasing funds:
A specialist damp report
This is a full survey carried out by a qualified damp specialist, not the mortgage surveyor. It should identify the type and cause of the damp, the extent of the problem, and the recommended treatment.
Evidence of treatment
Once works are completed, the lender will want written confirmation from the specialist company that treatment has been carried out to specification.
A guarantee
This is the part most buyers and sellers do not anticipate. Most mortgage lenders require the damp treatment to be backed by a guarantee of at least ten years, and the guarantee must be insured. An uninsured guarantee from a company that may not exist in five years is not acceptable to most lenders.
A retention or condition
Some lenders will proceed with the mortgage but retain a portion of the funds until a specialist report and proof of treatment are provided. Others will make treatment a condition that must be satisfied before they will lend at all. This depends on the lender, the severity of the damp, and the type of property.
Buying a House with Rising Damp: What to Expect
Rising damp is the type most commonly flagged on mortgage surveys, particularly in older properties. If the survey has flagged rising damp specifically, here is the likely sequence of events.
The lender instructs or requests a specialist damp report. The specialist surveys the property and provides a written report identifying the cause and extent of the rising damp, along with a specification for treatment and a quote. The buyer and seller negotiate who pays for the works, which is a common point of negotiation at this stage. Treatment is carried out, typically injection damp proof course with replastering. The specialist issues a completion certificate and a guarantee. This documentation is passed to the lender, satisfying their condition.
The timeline from damp being flagged to treatment being completed and evidenced is typically two to four weeks, depending on how quickly a specialist can survey, how quickly works can be scheduled, and how long replastering and drying takes before a completion certificate can be issued.
If you are working to a tight completion deadline, instruct a specialist as soon as the lender’s condition is confirmed. Do not wait.
Damp Reports for Mortgage Purposes
Not every damp report will satisfy a mortgage lender. The report needs to:
- Be produced by a qualified specialist, ideally a member of the Property Care Association (PCA)
- Clearly identify the type and cause of the damp
- Specify the treatment required
- Be accompanied by a written quote or confirmation of works
Generic reports that list possible causes without committing to a diagnosis are not useful for mortgage purposes. If you are commissioning a damp report specifically to satisfy a lender condition, make this clear when you book. The report needs to be detailed enough for the lender’s surveyor to confirm that the condition has been addressed.
What Guarantees Mortgage Lenders Accept
The guarantee requirement is where transactions sometimes stall. Here is what lenders typically need.
Minimum ten years
Most lenders require a guarantee of at least ten years on damp proofing works. Some require longer.
Insurance-backed
The guarantee must be backed by Guarantee Protection Insurance or an equivalent insurance product. This means that if the damp proofing company ceases trading, the guarantee remains valid and can be claimed against. An uninsured guarantee from the company alone is not sufficient for most lenders.
Transferable
The guarantee must transfer to the new owner on completion. This is standard for insurance-backed guarantees but worth confirming before works are commissioned.
Kenwood’s 20-year guarantee is fully insurance-backed through GPI and transfers on sale. It satisfies the requirements of mainstream mortgage lenders and is accepted by solicitors as evidence that the condition has been met. When you book a survey and proceed with treatment, we provide all documentation required to satisfy lender conditions.
Selling a Property with Damp: How to Avoid Delays
If you are the seller and damp has been flagged on the buyer’s survey, acting quickly is in your interest. Every week of delay increases the risk of the buyer pulling out or renegotiating on price.
Get a specialist survey booked within days of the report being flagged, not weeks. Use a company that can carry out both the survey and the treatment, issue a proper guarantee, and provide documentation quickly. Make sure the guarantee is insurance-backed and transferable before you commission any works. Pass all documentation to your solicitor as soon as it is available so it can be forwarded to the lender without delay.
In some cases, sellers choose to have damp treated before putting a property on the market, particularly in areas where Victorian housing stock is common and buyers are likely to instruct surveys. Having a recent treatment report and an insurance-backed guarantee in place before sale removes a common point of negotiation and gives buyers and their lenders confidence.
Can a Mortgage Be Declined Because of Damp?
Yes, though outright decline is less common than a retention or condition. A lender is unlikely to decline a mortgage solely because of damp if the problem is treatable. What they will not do is lend against a property with an unresolved structural or damp problem that has not been assessed and addressed.
The situations most likely to cause a lender to decline or significantly restrict lending are:
- Damp that has caused significant structural timber damage such as extensive dry rot or wet rot in floor joists or roof timbers
- Damp combined with other structural concerns such as subsidence or movement
- A property where multiple types of damp are present and the full extent is unknown
- A seller who is unwilling to address the problem or contribute to the cost of treatment
In these cases, specialist treatment and thorough documentation are even more important. A detailed report from a qualified specialist, combined with a fully insured guarantee, gives the lender the evidence they need to proceed with confidence.
Frequently Asked Questions
Can you get a mortgage on a house with rising damp?
Yes, in most cases. Most lenders will require a specialist damp report and evidence of treatment before releasing funds. The treatment must be backed by an insurance-backed guarantee that transfers to the new owner.
What is a damp report for mortgage purposes?
A written report produced by a qualified damp specialist identifying the type, cause, and extent of damp in a property, along with a specification for treatment. It must be detailed enough to satisfy the lender’s surveyor that the condition has been addressed.
How long does damp treatment take before a mortgage can proceed?
From survey to completion certificate, typically two to four weeks. If you are working to a tight deadline, book a specialist as soon as the lender’s condition is confirmed.
If damp has been flagged on a mortgage survey and you need treatment completed quickly, Kenwood can help. We carry out specialist surveys across London and the South East, provide full documentation for mortgage purposes, and back all treatment with a 20-year insurance-backed guarantee that satisfies lender requirements.
