Can You Get a Mortgage on a Flat With Cladding? What Buyers Need to Know in 2026

Cladding remains one of the most misunderstood issues in the UK residential mortgage market. A building can have an external wall system and still be perfectly capable of supporting mortgage lending, while another apparently similar block can create substantial valuation and underwriting difficulties. For buyers and existing leaseholders, understanding the building-safety position before a mortgage application reaches valuation can prevent significant delay and uncertainty.

For many flat buyers, the first time cladding becomes a serious issue is not when they view the property or make an offer. It is when the mortgage valuer inspects the building and asks for further information about its external wall construction. A transaction that appeared straightforward can then stop while the buyer, seller, solicitor, managing agent and freeholder attempt to establish what documentation exists and whether the lender will accept it.

That has helped create a persistent misconception that a flat with cladding cannot be mortgaged. The reality is considerably more nuanced. The presence of cladding by itself does not determine whether a lender will advance money. What matters is the nature of the external wall system, whether there are relevant fire-safety concerns, the evidence available to the valuer, any remediation that may be required and the lender's own policy towards the building in its current condition.

This distinction is important because mortgage lenders are not assessing cladding in isolation. They are deciding whether the flat represents acceptable security for a loan. A financially strong borrower can therefore encounter difficulty if the lender's valuer cannot establish an acceptable value or is unable to become comfortable with the building's external wall position.

Why Cladding Still Matters to Mortgage Lenders

When a lender advances money against a flat, it takes security over that property. If the borrower subsequently defaults and the lender needs to recover its money through a sale, the lender wants confidence that the property will remain saleable to a reasonably broad market. Unresolved external wall or building-safety concerns can create uncertainty around both valuation and future demand, which is why these issues remain relevant even where the borrower can comfortably afford the mortgage.

The mortgage market's approach changed dramatically following the Grenfell Tower tragedy. External wall construction, combustible materials and the cost of remediation became central considerations for valuers and lenders across many multi-occupancy residential buildings. Since then, legislation, industry guidance and remediation programmes have substantially changed the landscape, and the assessment process is now more proportionate than during the most restrictive period after Grenfell.

Nevertheless, a lender cannot simply ignore a known or suspected building-safety issue. If remediation may be necessary, questions can arise over the cost, who is responsible for paying, how long works will take and what effect the position has on the value and saleability of individual flats. Those are mortgage-security questions as much as building-safety questions.

What Does ‘Cladding’ Actually Mean?

Cladding is a broad term for material forming part of the exterior of a building. External wall systems can contain a combination of cladding, insulation, cavity barriers, fire-break systems and other components. Many buildings incorporate external materials for weather protection, insulation, energy efficiency or architectural design without presenting the problems commonly associated with the post-Grenfell cladding crisis.

The distinction matters because the mortgage question is not simply “does this building have cladding?” RICS describes the external wall system as encompassing the outside wall of the residential building, including cladding, insulation and fire-break systems. Assessment is therefore concerned with the external wall construction as a whole and whether relevant materials or design features create risks that affect the valuation.

Two apartment buildings can consequently look similar from the street while presenting very different positions to a mortgage lender. One may have an external wall system that requires no remediation and produces no material valuation concern. Another may have identified defects, incomplete evidence or an unresolved remediation programme that requires considerably more investigation.

What Is an EWS1 Form?

The External Wall System 1 process was introduced to give lenders and valuers a standardised way of obtaining professional information about the external wall system of relevant residential buildings. A suitably qualified professional assesses the external wall system before completing the form, helping the mortgage valuation process establish whether the construction raises concerns and whether remedial work may be required.

An important point is frequently lost in consumer discussions about EWS1: the form is not a general building-safety certificate. RICS explicitly states that an EWS1 is not a life-safety certificate. Its role is connected to the assessment of the external wall system for valuation and lending purposes. It should not be treated as proof that every aspect of a building is safe or that no future remediation could ever be required.

The EWS1 applies to the building or block rather than being a separate assessment of each individual flat. RICS explains that the process can also be relevant to mixed-use buildings where residential accommodation forms part of the structure. This is why buyers are normally dependent on the building owner, freeholder or managing agent for the relevant documentation rather than commissioning an EWS1 themselves for the flat they want to purchase.

Does Every Flat With Cladding Need an EWS1?

No. This is one of the most important points for buyers to understand. The EWS1 process should not be applied automatically to every flat or every building that has some form of external cladding. RICS guidance takes a proportionate approach and requires valuers to have a rationale for requesting an EWS1.

Factors considered include the height of the building, the type and extent of external wall materials and, in relevant circumstances, the presence of combustible material on balconies. Professional judgement remains important, and the valuer must also act in accordance with the instructions of the mortgage lender that commissioned the valuation. This means a simplistic rule based purely on the number of storeys is unlikely to capture how a real mortgage case will be assessed.

The direction of travel is towards a more risk-based system rather than indiscriminate requests for EWS1 forms. RICS published a second edition of its secured-lending valuation standard in May 2026, although that edition does not become effective until 1 November 2026. The new standard continues to emphasise that a valuer should have a rationale for requesting an EWS1 and that professional judgement is required.

That timing is particularly relevant in August 2026. Buyers should not assume that a future standard is already in force, while equally recognising that lender and valuer practices continue to evolve as the industry moves beyond the blanket caution that characterised the earlier years of the cladding crisis.

Can You Get a Mortgage on a Flat With Cladding?

In many circumstances, yes. A building with an external wall system can still be acceptable mortgage security where the lender's valuation can be completed satisfactorily and the available evidence does not reveal an unacceptable risk to value or marketability. The mere existence of cladding is therefore not sufficient reason to conclude that a flat cannot be financed.

The position becomes more complicated where the external wall system has identified defects, the documentation is incomplete or remediation is still required. At that point, lenders may take different views. Some may be prepared to proceed where the remedial programme is clearly defined and funded, while another lender may want works completed or additional evidence before it will accept the property.

This is why two buyers approaching the same building through different mortgage lenders can sometimes experience different underwriting journeys. The borrower's income and deposit may be almost identical, but the lender's property policy and the valuer's ability to support the security remain critical parts of the decision.

What Happens When the Valuer Cannot Provide a Mortgage Valuation?

One of the most alarming outcomes for a buyer is a valuation returned with no mortgage value while further building information is requested. That can sound as though the flat has been declared worthless. It has not necessarily been.

RICS explains that a so-called nil valuation can be a technical consequence of the valuer not having enough information to provide a mortgage valuation at that point in time. It can therefore signal that the lender or valuer requires additional evidence rather than that the property has no market value or can never be mortgaged.

The practical problem is that the transaction can stop until the missing information arrives. The managing agent or building owner may need to locate an existing assessment, provide details of remediation or obtain additional professional evidence. If several parties are involved, the delay can become substantial even where the eventual mortgage outcome is positive.

Buyers should therefore distinguish between a lender permanently rejecting a building and a valuer being temporarily unable to complete the valuation. They are very different situations and may require very different responses.

Why Missing Documentation Can Derail an Otherwise Good Purchase

Documentation is frequently where cladding-related mortgage transactions become difficult. The buyer may have an excellent income, a substantial deposit and a clean credit profile, but none of those strengths can compensate for the lender being unable to establish whether its security is acceptable.

Depending on the building and lender, information could include an existing EWS1 where relevant, details of external wall assessments, fire risk documentation, information about identified defects, the scope and timetable of remediation, and evidence explaining how necessary works will be funded. The precise requirements are building- and lender-specific, which is why obtaining a generic list of documents is not a substitute for understanding the particular property.

A common source of frustration is that the mortgage applicant does not control this information. It may sit with a freeholder, managing agent, developer or responsible person for the building. Buyers can therefore lose valuable time waiting for third parties to respond while a mortgage offer deadline or property chain continues to move.

What If the EWS1 Is More Than Five Years Old?

This has become increasingly relevant as the earliest EWS1 forms reach and pass the five-year point. RICS states that the EWS1 process was designed around a form valid for the entire building for five years. Industry guidance has consequently had to address what happens when older forms are encountered during later sales and remortgages.

RICS notes that UK Finance and the Building Societies Association updated their industry statements in April 2025 to address EWS1 forms more than five years old, as well as forms completed by invalid signatories. The existence of an old EWS1 should therefore be identified early rather than assumed to remain automatically acceptable for a new mortgage application.

This is another reason why a seller saying “the building has an EWS1” does not answer every mortgage question. The adviser, solicitor and valuer may still need to establish the date, outcome, signatory and whether the lender is satisfied with the evidence available today.

Can You Buy While Remediation Is Still Underway?

Potentially, but the funding position becomes more important. A lender considering a building undergoing remediation will want to understand what work has been identified, how advanced the programme is, whether there is a clear completion plan and what financial exposure, if any, could remain with the leaseholder.

A fully funded and well-documented remediation programme can present a very different risk from a building where the scope of works remains disputed or nobody can establish who will meet the cost. The valuer also needs to consider whether the current position affects the flat's market value and whether a normal resale market is likely to exist.

The result is that “remediation underway” is not a single lending category. A building close to completion with clear documentation may be viewed very differently from one at the beginning of a complicated dispute. This is precisely where lender selection becomes important.

How the Building Safety Act Changed the Position for Leaseholders

The Building Safety Act 2022 introduced a substantially changed legal framework for building safety in England and created important protections relating to the cost of addressing certain historical building-safety defects. Alongside remediation programmes and wider reforms, this has helped create greater clarity around some buildings that previously faced severe mortgage and transaction difficulties.

However, legislation does not mean every affected building immediately becomes straightforward mortgage security. A lender and valuer still need to understand the specific building, the nature of any defects, the remediation position and the financial implications for the leaseholder. Legal protection from some remediation costs and mortgageability are related issues, but they are not exactly the same question.

Buyers should therefore rely on their conveyancer for advice about the legal protections applying to the lease and building rather than assuming that a mortgage approval proves there is no building-safety or leaseholder-liability issue. The mortgage adviser, solicitor and surveyor perform different roles and all can be relevant to a cladding-affected purchase.

Why the Valuation Matters as Much as the Mortgage Criteria

Buyers sometimes assume that finding a lender whose published criteria appear to permit cladding is enough. In practice, the valuation remains a critical part of the transaction. The lender may be open to the building in principle but will still rely on its appointed valuer to assess the individual property and determine whether an acceptable mortgage valuation can be provided.

That distinction explains why a broker cannot guarantee the outcome simply because another flat in the same block has previously obtained a mortgage. The earlier transaction may have involved a different lender, a different valuation firm, different documentation or a different building-safety position at the time.

Equally, a previous mortgage decline does not necessarily mean every other lender will reach the same conclusion. If the original lender's policy was particularly restrictive, or if further documentation has since become available, a different route may exist. The case needs to be reassessed against the current facts rather than treated as permanently unmortgageable.

Can You Remortgage a Flat Affected by Cladding?

Existing owners can encounter the same issues when they come to refinance. A flat that was readily mortgageable when purchased several years ago can face a different valuation environment when the fixed mortgage period ends, particularly if external-wall concerns have since been identified or documentation has become outdated.

This can reduce the number of lenders willing to consider the property, potentially affecting both pricing and available loan-to-value. In some cases, the existing lender's product-transfer options may become particularly important if moving to a new lender would trigger a fresh valuation and external-wall assessment.

That does not mean an affected leaseholder should automatically remain with the existing lender. It means the remortgage should be investigated early enough to establish the building's current position and test the wider lender market before the existing deal expires. Waiting until the final few weeks can leave very little time to resolve missing documentation.

Why Specialist Mortgage Advice Can Make a Difference

Cladding-related cases sit at the intersection of mortgage criteria, property valuation and building-safety evidence. That makes them fundamentally different from a standard application where the main question is whether the borrower passes an affordability model.

An adviser experienced with unusual property can investigate the likely lender position before an application is submitted, establish what information may be required and avoid lenders whose policy is clearly incompatible with the building. Where the circumstances are less clear, the broker can discuss the case with lender teams before a full application and valuation fee are committed.

This does not remove the valuer's independence or guarantee that a building will be accepted. It does, however, reduce the risk of treating all lenders as though their approach is identical. For a buyer already facing a mortgage decline, the first question should usually be why the original lender declined — not simply which lender should receive the next application.

Practical Steps Before Buying a Flat With Cladding

The most useful step is to investigate the building before becoming financially committed wherever possible. Ask the selling agent or seller what is known about the external wall system and whether assessments, remediation plans or relevant building-safety documents already exist. If an EWS1 is available, establish its date rather than merely confirming that a form exists.

Your conveyancer should undertake the appropriate legal investigation and advise on matters including the lease, building-safety documentation and any relevant leaseholder protections. A mortgage adviser can simultaneously assess lender appetite. Those two processes should complement each other rather than one being treated as a substitute for the other.

Above all, avoid the two opposite assumptions that cause many problems: that any cladding makes a flat unmortgageable, or that an attractive mortgage agreement in principle means the property itself has already been approved. An agreement in principle primarily concerns the borrower. The property normally still needs to pass valuation and full underwriting.

How Willow Private Finance Can Help

At Willow Private Finance, we regularly assist buyers and existing leaseholders where the property itself creates the principal mortgage challenge. That includes flats affected by external wall systems, building-safety documentation, ongoing remediation, unusual construction, leasehold issues and other circumstances that can narrow mainstream lender appetite.

Our role is to assess the complete transaction: the borrower, the building, the evidence available, the valuation risk and the lenders whose current approach is most likely to fit those circumstances. Where a previous mortgage has stalled or been declined, we can also review the reason for that outcome before determining whether another lending route is credible.

The objective is not to suggest that every cladding-affected flat can be financed. Some buildings will remain difficult until safety concerns, remediation or documentation are resolved. The value of specialist advice is in identifying that position as early as possible and, where a viable mortgage route does exist, approaching lenders whose underwriting and valuation policies fit the property rather than submitting applications indiscriminately.