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Fire safety regulations in the UK: What developers and investors need to know

Fire safety has become one of the most significant regulatory issues facing the UK property sector.
May 14, 2026
Fire safety has become one of the most significant regulatory issues facing the UK property sector.

Following the tragic Grenfell Tower fire in 2017, the government introduced a far-reaching programme of reforms designed to improve building safety and strengthen accountability across the construction and property lifecycle.

These changes continue to evolve, with new duties and guidance affecting developers, investors and asset owners.

For those involved in development or property investment, understanding how fire safety regulation is changing and how it affects project viability, has never been more important as Nicki Rought, Associate in the Building & Project Consultancy team at Vail Williams, explores.

A new regulatory landscape for building safety

Fire safety in the UK is primarily governed by the Regulatory Reform (Fire Safety) Order 2005, alongside more recent legislation including the Fire Safety Act 2021 and the Building Safety Act 2022.

Together these reforms have significantly expanded the responsibilities of building owners, developers and managing agents.

The Fire Safety Act clarifies that fire risk assessments must consider the external walls of buildings, including cladding systems, and flat entrance doors.

Meanwhile, the Building Safety Act introduced a new regulatory framework for higher-risk buildings and established the Building Safety Regulator, responsible for overseeing safety and compliance across design, construction and occupation.

The result is a regulatory framework that places far greater emphasis on accountability, transparency and documented compliance throughout a building’s lifecycle, from early design stages, planning and construction through to ongoing management.

Key fire safety developments affecting property

Stronger requirements for fire risk assessments

For investors acquiring existing assets, due diligence around fire safety compliance has become a critical part of the transaction process.

Recent changes now require responsible persons to record fire risk assessments in full and document the fire safety arrangements in place. This represents a shift away from informal compliance towards auditable safety management, increasing the importance of professional advice and robust documentation.

Changes to design guidance and building regulations

Updates to Approved Document B, which governs fire safety within building regulations, continue to reshape design requirements.

Recent amendments include:

  • Sprinkler systems required in all new care homes
  • Changes to fire testing standards
  • Updated guidance on fire safety information handed over during construction

For developers, these changes can affect design feasibility, build cost and programme, particularly where schemes were designed under previous guidance.

New responsibilities for high-rise residential buildings

From April 2026, additional regulations require those responsible for high-rise residential buildings to actively manage fire risks and evacuation planning.

These include requirements around:

  • Evacuation strategies for vulnerable residents
  • Improved information sharing with occupants
  • Stronger oversight of building safety systems

These obligations extend beyond construction and into long-term operational management.

For developers, the new fire safety regime introduces several practical implications, resulting in longer planning approvals and viability considerations to compliance.

Longer approval processes

High-rise residential projects must now pass a three-stage gateway approval process, requiring more detailed design information earlier in the project lifecycle.

While intended to improve safety oversight, this has also contributed to delays in the approval of high-rise developments in some cases.

Design changes and viability considerations

Regulatory changes such as requirements for second staircases in certain buildings and more stringent façade assessments are influencing building layouts and densities.

In some schemes, these changes may require:

  • Redesign of floorplates
  • Reduced unit numbers
  • Higher construction costs

As a result, early input from building consultancy specialists is critical to maintain residential development viability and avoid costly redesigns later in the planning process.

What investors should be thinking about

For investors, fire safety reforms raise several key considerations.

Due diligence and risk management

Investors must ensure buildings comply with the latest fire safety regulations and guidance, particularly where cladding systems or high-rise residential buildings are involved.

Operational compliance

Asset owners now carry clearer legal responsibilities as the “responsible person” under fire safety legislation.

This includes:

  • Maintaining accurate fire safety records
  • Ensuring risk assessments are up to date
  • Sharing relevant safety information with occupants and building managers.
Future-proofing assets

With regulation continuing to evolve, investors should consider how buildings will perform under future safety standards, not just current ones.

The complexity of the new fire safety regime means building consultancy advice is increasingly important across the property lifecycle.

Early input can help clients:

  • Identify fire safety compliance risks during acquisition due diligence
  • Integrate fire strategy requirements into development design
  • Avoid costly redesigns or delays during regulatory approvals
  • Ensure robust documentation for Building Safety Regulator submissions
  • Protect long-term asset value and investor confidence

For developers and investors, fire safety is no longer simply a technical compliance issue. It has become central to a projects critical path in development design, project delivery and long-term asset management.

With the regulatory landscape continuing to evolve, engaging experienced building consultants early in the process can help ensure schemes remain compliant, commercially viable and attractive to future investors.