In the wake of several high-profile fire tragedies in the UK, notably the Grenfell Tower fire in 2017, significant attention has been directed towards the safety of residential buildings. Governments and industry regulators have responded with heightened scrutiny, redrafted policies, and new safety legislation. While these measures have obviously centred on ensuring that buildings are safe for inhabitants, they’ve had far-reaching consequences beyond the construction and property industries. One key area that has experienced profound ripple effects is the mortgage market—particularly for flats which, by virtue of being part of larger, often multi-storey complexes, are inherently affected by building safety requirements.

For many prospective buyers, securing a mortgage is an integral part of the pathway to home ownership. However, what might once have been a straightforward process has become complex and frustrating for people looking to acquire a flat in buildings affected by the new building safety legislation. This article delves into the intricacies of how changes in safety regulations have impacted mortgage approvals, the role of lenders, and the future of the flat housing market in the UK.

The Origins of Modern Building Safety Regulation

An increased focus on building safety in the UK can largely be traced to the Grenfell Tower disaster, where 72 people tragically lost their lives due to a rapidly spreading fire exacerbated by combustible cladding. In the aftermath, it became alarmingly clear that many other residential buildings across the country had similar unsafe cladding materials and fire safety weaknesses.

The UK government responded by launching widespread inspections and committing to reforming building safety practices. This culminated in the introduction of the Building Safety Act 2022, and the establishment of the Building Safety Regulator to oversee enforcement. Furthermore, the External Wall Fire Review process, commonly known as EWS1, was introduced for buildings of a certain height to assess fire risks associated with external walls.

While all these measures were necessary and welcome from a safety perspective, they have introduced complications for flat owners, prospective buyers, and lenders alike.

Mortgage Lenders and Risk Aversion

From a lender’s perspective, the core concern when approving a mortgage is risk. The primary security for many housing loans is the property itself. If a flat is in a building that is deemed unsafe or presents unresolved fire risks, that property effectively becomes illiquid. As a result, lenders may either refuse to provide a mortgage or request expensive conditions such as remediation plans or certifications like the EWS1 form.

The issue is further complicated when the costs of required remediation works are either unknown or not yet funded. This uncertainty leads lenders to withhold mortgage approvals until there is clarity, leaving many buyers in limbo. Consequently, properties that previously could be bought and sold readily are now practically unmortgageable unless stringent documentation is in place.

This climate has led to a tightening of lending standards. Even flats in buildings considered safe may be caught up in the tightening of due diligence, as lenders become more scrupulous about potential liabilities. For buyers, this means extended timelines, increased legal scrutiny, and, quite often, failed transactions.

The EWS1 Form: Gatekeeper to Mortgage Approval

Created jointly by the Royal Institution of Chartered Surveyors (RICS) and UK Finance, the EWS1 form was intended to provide a standardised way to assess the fire safety of a building’s external wall system, including cladding, insulation, and balconies. When first introduced, the form was only required for flats in buildings above 18 metres, but an abundance of caution among lenders led to its widespread application in buildings under that height.

Over time, this practice began affecting thousands of leaseholders and buyers, creating a bottleneck in the housing market. The most pressing issue was the limited number of qualified professionals available to carry out EWS1 assessments, resulting in long delays. Additionally, a lack of clarity on which buildings truly required an EWS1 form led to inconsistent decisions by mortgage lenders.

In December 2020, the government issued guidance stating that EWS1 forms were not necessary for buildings under 18 metres with no cladding risk. However, lenders have been slow to adapt, primarily due to liability concerns, leading to continued delays and denials of mortgages that arguably shouldn’t have required the form in the first place.

The Leaseholder’s Dilemma: Trapped in Unsellable Homes

One of the most devastating aspects of the new safety regime has been its impact on current flat owners who have found themselves effectively trapped in their homes. Some owners, especially those in flats with unsafe cladding or pending remediation works, have discovered that their properties are valued at zero by surveyors for mortgage purposes. This ‘nil valuation’ renders the flat unmortgageable and severely restricts resale opportunities.

These leaseholders are often caught in a painful paradox. They can’t sell their flat due to the absence of fire safety certificates or unresolved cladding issues, but they also can’t afford the remediation costs upfront, particularly if freeholders have passed these costs onto leaseholders. Even when the government has provided funding or introduced the Building Safety Fund, delays in application processing mean that many flats remain in stasis for months, if not years.

Moreover, leaseholders looking to move for genuine reasons—job relocations, growing families, or personal circumstances—have found themselves financially and emotionally exhausted. For these individuals, the mortgage obstruction isn’t just a matter of inconvenience; it can drastically alter life plans and prospects.

The Role of Valuers and Surveyors

Valuation professionals play a pivotal role in determining whether a flat secures a mortgage. Their assessments underpin the risk profile of a property. Where previously a surveyor might have focused on general structural integrity or maintenance, they are now also required to consider an expansive list of fire safety concerns.

Surveyors are increasingly cautious, particularly in cases where no definitive evidence of safety can be provided. Without an EWS1 form or clear documentation from the building management, surveyors are inclined to declare the flat unsuitable for lending. This is especially true when professional indemnity insurance policies for surveyors are either not available or prohibitively expensive due to the increased liability related to fire safety inspections.

This environment has created a kind of pass-the-parcel scenario where everyone involved — from surveyors and lenders to flat owners and builders — is reluctant to accept liability. This reluctance directly affects mortgage approvals by creating a feedback loop of uncertainty.

Government Intervention and Support Schemes

To mitigate fallout from these issues, the UK government has launched several initiatives aimed at supporting flat owners and restoring confidence in the housing market. The Building Safety Fund, initiated in 2020 and extended in subsequent years, is designed to cover the cost of removing flammable cladding on high-rise residential buildings. The government has also proposed measures to prevent leaseholders from being unfairly burdened with the cost of remediation.

A significant development occurred in 2022, when developers were called upon to contribute towards a £4 billion remediation fund. Several major building firms signed up to these commitments, thereby relieving some pressure from leaseholders. The introduction of the Leaseholder Protection provisions under the Building Safety Act has further sought to cap and control the costs imposed on leaseholders.

In addition, agreements have been pursued with banking stakeholders and the wider financial industry to ensure more realistic and uniform implementation of the EWS1 form and similar documentation frameworks.

Nonetheless, these interventions offer a mixed bag of results. While they mark the right steps, the practical implementation has been slow and inconsistent, with many affected parties reporting prolonged periods of inaction and limited transparency on timelines.

Long-Term Market Implications

The broader housing market will take years to fully recover from the ripple effects of the building safety legislation. On a micro-economic level, the reduced liquidity of flats in buildings with unresolved safety concerns has suppressed property values and hindered mobility among homeowners. For first-time buyers, the flat market was traditionally a more accessible entry point. Without mortgage availability, that doorway has narrowed.

On a macro-economic level, the situation has dampened confidence in the leasehold system and created caution amongst developers, investors, and lenders. Many developers are reassessing the risk profiles of tall residential buildings and reconsidering how they are designed and constructed. The newly elevated regulatory standards have increased building costs, which could either push housing prices upward or reduce the supply of new flats, exacerbating the UK’s housing shortage.

Furthermore, the experience has led to louder calls for reform of leasehold laws in general, with advocates arguing that it unfairly places financial and legal burdens on leaseholders who have little control over the building’s safety standards or management decisions.

Lenders Navigating a New Era

Financial institutions are responding in various ways. Some have updated their lending criteria, cooperating more closely with insurers and legal advisors to de-risk flat mortgages. Others maintain a conservative approach, continuing to hold off on approvals until there’s rock-solid evidence of safety compliance. This patchwork response contributes to continued confusion and lack of consistency in the flat mortgage market.

There are also signs that proptech solutions could assist in resolving some issues by offering real-time access to building safety data, documentation, and remediation schedules. Such tools could streamline mortgage decision-making and provide greater transparency. However, until such systems are widely adopted and recognised by lenders, the inertia from the safety crisis will continue to dominate.

Hope on the Horizon?

Despite the complexities and frustrations, there is cautious optimism. As more buildings complete remediation works and as systems to assess and document safety become more sophisticated, a pathway to normalisation is beginning to take shape. The continued commitment from the government to support affected leaseholders, combined with growing awareness among lenders and the public, suggests that the market could gradually find equilibrium.

What remains essential is sustained dialogue and transparency between stakeholders: developers, managing agents, lenders, government officials, and homeowners all have roles to play in rehabilitating trust in the flat market. Legal reform and operational clarity will be pivotal to that restoration.

Conclusion: A Tipping Point for Reform

The intersection of building safety legislation and mortgage lending has brought to light structural vulnerabilities in the UK’s housing system—particularly for flats. What began as a necessary and overdue reckoning on fire safety has evolved into a broader crisis of confidence in the leasehold model, lender risk appetite, and regulatory coordination.

While the intention behind reforms is unquestionably valid, the unintended consequences—trapped homeowners, frozen sales, and a fragmented mortgage market—have exposed the need for a more integrated, transparent system. The road to resolution will involve not only completing remediation works and standardising safety documentation, but also modernising how risk is assessed and communicated across the industry.

With time, education, and better coordination, the flat market can rebound. But the legacy of this period may well be a fundamental reshaping of how buildings are managed, how responsibilities are shared, and how financial institutions approach residential property risk in an age of heightened accountability.