How to Safeguard London’s Heritage Buildings from Rising Fire Risks: Essential Compliance Strategies for 2025

Safeguard London’s heritage buildings from rising fire risks, and this guide will show property managers, facilities teams, owners and Responsible Persons what to prioritise in 2025. You will learn the principal threats to historic fabric, how recent regulatory changes affect compliance, practical fire safety measures that respect conservation values, and the immediate steps to reduce risk while meeting legal duties.

 

Safeguard London’s heritage buildings from rising fire risks: key threats in 2025

Heritage buildings face a unique and mounting set of fire risks. Many structures contain original timber, historic finishes, and complex layouts that can speed fire spread and make evacuation harder. Additionally, retrofit activity, increased visitor numbers and rising temperatures add new pressures. For owners and managers, recognising these threats is the first step to sensible mitigation.

Recent regulatory updates have also altered the compliance landscape. Approved Document B received amendment material in 2025 that affects fire precautions and product standards for new work and significant alterations. These updates influence specification choices and expectations for passive and active fire systems in both new and existing projects.

 

Understand your legal duties and record-keeping requirements

The Regulatory Reform (Fire Safety) Order 2005 remains the core duty-holder framework for most non-domestic and common parts of residential buildings. The Order requires the Responsible Person to carry out a suitable and sufficient fire risk assessment and to take general fire precautions. In addition, changes driven by the Building Safety Act mean that recording full fire risk assessment findings and fire safety arrangements is now widely expected. This strengthens enforcement powers and means detailed documentation must be kept up to date. See the Fire Safety Order guidance and the Regulatory Reform (Fire Safety) Order 2005.

In practice, this means you must not only act to reduce risk, but also keep clear, accessible records of what you assessed, what you decided, and when you will review actions. Good documentation supports legal compliance and speeds decisions during repairs or inspections.

 

Balance conservation with protection: legal and technical flexibility

Approaches that work on modern buildings will sometimes harm a listed structure. Fortunately, statutory guidance acknowledges the need for tailored solutions in historic buildings. Approved Document B and Historic England both advise a case‑by‑case, risk-based approach where traditional prescriptive measures are impractical. This opens the door to fire engineering, discreet systems and reversible interventions that protect occupants and the building’s character. Always involve conservation officers and heritage advisers early.

 

Prioritise measures that give the greatest risk reduction

When budgets are limited, prioritise measures that reduce the greatest risk to life. Start with a competent, heritage-aware fire risk assessment. That assessment should map escape routes, identify vulnerable occupants and note high-risk features such as voids, historic service runs and timber staircases. Book a professional assessment with a team experienced in listed and historic buildings to ensure recommendations are practical and sympathetic. Total Safe fire risk assessments deliver targeted, actionable reports for London buildings.

Core areas to address

Compartmentation and fire-stopping — slow fire spread by sealing voids and gaps with reversible, tested systems suited to historic fabric.

Fire doors and upgraded heritage doors — protect escape routes by upgrading doors where replacement would harm original joinery.

Detection and alarm systems — tailor systems to the building’s fabric, favouring wireless or low-impact technologies.

Maintenance schedules and staff training — ensure measures remain effective through inspection, testing and people preparedness.

 

Passive protection: compartmentation, fire-stopping and doors

Good compartmentation remains the single most effective passive protection for limiting fire spread. In heritage buildings, adding new masonry walls is usually not possible. Instead, use reversible, tested fire-stopping systems in service voids and gaps, and upgrade existing partitions where they can be worked sympathetically.

Fire doors are essential where escape routes must be protected. If replacement would harm historic features, consider upgrading existing doors or fitting certified enhancement products that improve resistance without replacing original timbers. The London Fire Brigade has practical advice on upgrading heritage doors and recommends using competent craftspeople and tested products where possible.

For specialist works such as door restorations or fitting intumescent seals, engage contractors who understand both fire performance and conservation. Total Safe’s services include fire door surveys and refurbishment to combine safety with preservation. Explore Total Safe fire safety services.

 

Active systems: detection, suppression and discreet sprinklers

Early detection gives people time to escape and teams time to intervene. Modern multi-zone alarm systems with wireless sensors can protect sensitive interiors without intrusive wiring. For high-value or high-occupancy heritage sites, consider aspirating detection or multi-sensor devices that reduce false alarms and provide rapid response.

Sprinklers and suppression systems provide robust life-safety and property protection. Where visible pipework would harm fabric, specialist concealed or low-pressure systems can be installed with minimal visual impact. Note that Approved Document B updates have clarified expectations for sprinklers in specific building types from 2025; a risk-based design and early liaison with building control remains essential.

 

Fire engineering and bespoke solutions

Where standard measures will damage the historic character, a fire engineering approach can produce a compliant, tailored solution. Fire engineers use analysis and modelling to justify alternative measures that match the building’s constraints. These engineered strategies often combine detection, compartmentation, limited suppression and careful management plans.

For large or complex heritage sites, a proportionate engineered solution can be faster, more cost-effective and less destructive than attempts to force standard measures into unsuitable spaces. Work with designers and assessors experienced in heritage settings and ensure proposals gain listed building consent where required.

 

Management, training and maintenance

Even the best systems fail without proper upkeep. Regular inspection, testing and maintenance of fire alarms, emergency lighting, fire doors and fire-stopping is essential. Ensure a nominated, competent person manages the estate’s fire safety arrangements and that staff and volunteers receive role-specific training.

Run and record regular drills that reflect realistic scenarios for the building’s layout. Also maintain an up-to-date plan for contractors carrying out retrofit works; hot works, in particular, create acute fire risks in older buildings and must be managed with strict permits and supervision.

 

Working with heritage authorities and insurers

Listed building consent and local conservation officers must be part of any project that affects protected fabric. Early engagement avoids costly redesigns and helps identify acceptable, reversible methods. Historic England’s technical advice explains how building regulations and conservation can be reconciled in practice; it is a valuable resource when preparing proposals.

Also involve your insurer early. Insurers often require evidence of competent fire risk assessment and maintenance regimes. Well-documented fire safety arrangements can reduce premium increases and speed claims handling if an incident occurs.

 

Practical roadmap: what to do in the next 90 days

Commission a heritage‑aware fire risk assessment. If you do not already have one, prioritise immediate risks and get a remediation schedule. Arrange a Total Safe assessment.

Record and centralise documentation. Ensure all fire safety documentation is stored accessibly to meet strengthened recording expectations under the Fire Safety Order and Building Safety Act. See the official guidance.

Address the top physical risks. Focus on unsecured voids, compromised escape doors, and unreliable detection. Use reversible solutions where possible.

Establish hot works permits and supervision. Ensure contractors follow strict permit-to-work procedures for all retrofit or repair activity.

Plan training for staff and volunteers. Run sessions on evacuation, incident reporting and role-specific responsibilities.

 

Case example: sympathetic door upgrading

A mid‑Victorian townhouse used as a small museum required improved escape protection. Replacing internal doors would have destroyed original joinery, so the team specified tested intumescent lining and upgraded ironmongery. The intervention improved fire resistance, preserved character, and avoided a full door replacement. This type of solution balances conservation with safety and demonstrates the value of specialist advice.

 

Conclusion and recommended next steps

Safeguard London’s heritage buildings from rising fire risks by combining careful risk assessment, sensitive passive protection, the right active systems, and effective management. Recent regulatory changes in 2025 make it more important than ever to document decisions and to adopt a risk‑based, evidence-led approach. Start with a heritage‑aware fire risk assessment, involve conservation and building control early, and choose contractors experienced in historic work.

For an immediate, practical next step, commission a professional fire risk assessment and a fire door survey. These will give you a clear remedial plan that respects the building’s significance while reducing risk to occupants and fabric.

External guidance and policy you may find useful include the government’s Approved Document B updates, Historic England technical advice, and the London Fire Brigade guidance on heritage doors.

 

FAQ

Q: Do I always need listed building consent for fire safety work?

A: Not always. Minor, reversible measures may not require consent, but works that affect the character of the building usually do. Always check with your local conservation officer before starting intrusive work.

Q: What is the Responsible Person required to record about fire risk assessments?

A: The Responsible Person must record the full fire risk assessment and the arrangements for managing fire safety. Recent changes require comprehensive documentation to demonstrate how risks are managed. See the official guidance.

Q: Are sprinklers appropriate for historic buildings?

A: Sprinklers can be highly effective and there are low‑impact options for heritage sites. Design early with conservation and building control input to choose systems that minimise visual impact and avoid harm to fabric. See Approved Document B updates for detail.

Q: How can I upgrade a historic door without replacing it?

A: Options include tested intumescent linings, upgraded seals and certified hardware that preserve appearance while improving performance. Use competent joiners and certified products, and consult the London Fire Brigade guidance.

Q: Who should I contact for a heritage-aware fire risk assessment?

A: Engage a specialist fire safety consultancy with proven experience on listed and historic buildings to produce a practical, compliant plan. For tailored support in London and the South East, contact About Total Safe for a consultation.