Fire Alarms Bristol — Installation, Servicing & Maintenance
BS 5839-compliant fire alarm systems for businesses across Bristol and the South West. Designed, installed and maintained by local engineers.
Bristol's Trusted Fire Alarm Specialists
If your business in Bristol needs a fire alarm system — whether it's a brand new installation, an upgrade to an existing system, or ongoing servicing and maintenance — CJS Fire & Security are the local engineers to call.
We design, install and maintain fire alarm systems for commercial premises of all types across Bristol and the South West. Every system we install is fully compliant with BS 5839-1, the British Standard for fire detection and alarm systems in non-domestic buildings. We don't use subcontractors — every job is carried out by our own qualified engineers, based right here in Bristol city centre.
From a small retail unit in Broadmead to a multi-floor office block in Aztec West, we've installed fire alarms in all kinds of Bristol properties. We know the city, we know the buildings, and we know what inspectors and insurers expect.
Our Fire Alarm Services in Bristol
Whatever your property needs, we've got it covered. Our engineers are experienced across all major fire and security disciplines.
Fire Alarm Installation
New fire alarm systems designed and installed from scratch. We carry out a full site survey, specify the correct system for your premises, and install with minimal disruption to your business.
Learn MoreCommercial Fire Alarms Bristol
Fire alarm systems for offices, retail premises, warehouses, schools and commercial properties of all sizes. Fully designed to meet the specific risks and layout of your building.
Learn MoreFire Alarms for Care Homes
Specialist fire alarm systems for residential care homes and nursing homes — designed around the unique life-safety requirements and regulations that apply to premises with vulnerable occupants.
Learn MoreFire Alarm Servicing & Maintenance
Six-monthly servicing and maintenance contracts to keep your system fully compliant with BS 5839, your insurance requirements, and the Regulatory Reform (Fire Safety) Order 2005.
Learn MoreEmergency Fire Alarm Repairs
Fast response to system faults, persistent false alarms and failed components. Our Bristol-based engineers can attend quickly to get your system back online and compliant.
Learn MoreWireless Fire Alarm Systems
Cable-free fire alarm installation — ideal for listed buildings, occupied premises where running cables would be disruptive, or any building where a traditional wired system isn't practical.
Learn MoreTypes of Fire Alarm System We Install in Bristol
Not all fire alarm systems are the same. The right system for your Bristol premises depends on the size of your building, its use, the number of occupants, and the level of risk. Our engineers will always recommend the most appropriate and cost-effective solution.
Addressable Fire Alarm Systems
The most widely specified system for medium to large commercial premises in Bristol. Every detector and device has a unique electronic address, so the control panel can pinpoint exactly which device has triggered — whether that's a smoke detector on the third floor or a manual call point by the fire exit. This makes investigating alarms faster and dramatically reduces unnecessary evacuations. Addressable systems are fully scalable and can be expanded as your premises grow. All CJS installations are compliant with BS 5839-1.
Best for: Offices, schools, care homes, hotels, multi-floor or multi-zone buildings
Conventional Fire Alarm Systems
A reliable and cost-effective solution for smaller commercial premises. Detectors are grouped into zones — when a device triggers, the panel identifies which zone has activated rather than the exact device. Straightforward to install and maintain, and perfectly suited to smaller single-floor premises where the location of a trigger can easily be identified visually. Still fully compliant with BS 5839-1.
Best for: Small offices, retail units, cafés, restaurants, single-floor premises
Wireless Fire Alarm Systems
Modern wireless fire alarm systems require no cable runs, making them ideal for listed buildings where chasing cables into walls isn't permitted, occupied offices where disruption needs to be minimised, or any premises where a traditional wired installation isn't practical. Today's wireless systems are fully reliable, tamper-monitored and BS 5839 compliant — the technology has come a long way. CJS Fire & Security install wireless systems from leading UK manufacturers.
Best for: Listed buildings, heritage properties, occupied offices, temporary installations
Aspirating Smoke Detection (ASD)
The most sensitive smoke detection technology available. Air is continuously drawn through a network of sampling pipes to a central detector unit, which can identify smoke particles at far lower concentrations than conventional detectors — providing the earliest possible warning before a fire takes hold. Essential for server rooms, data centres, clean rooms and any environment where early detection is critical and conventional detectors would cause too many false alarms.
Best for: Server rooms, data centres, museums, galleries, high-value storage
BS 5839-1:2025 — The Updated Fire Alarm Standard
The British Standard for fire detection and alarm systems in non-domestic buildings was significantly updated in April 2025. BS 5839-1:2025 came into force on 30th April 2025, replacing BS 5839-1:2017 which was withdrawn on the same date. If your fire alarm system was installed or last serviced before this date, it's worth understanding what's changed — and whether your system remains fully compliant.
All new fire alarm installations in Bristol must now be designed, installed and commissioned to BS 5839-1:2025. CJS Fire & Security are fully up to date with the new standard and apply it to every installation and service visit we carry out.
Smoke Detectors Now Preferred in Sleeping Areas
Heat detectors are no longer recommended in bedrooms or sleeping areas (such as care homes, student accommodation and hotels). Smoke or multi-sensor detectors are now the specified choice to ensure faster fire detection where occupants are asleep.
Faster Alarm Signalling Requirements
Fire alarm signals to an Alarm Receiving Centre (ARC) must now be received within 90 seconds. Fault signals must be detected within 3 minutes. These tighter timing requirements improve emergency response times.
Red Fire-Resistant Mains Cables Mandatory
All fire alarm mains cabling must now be fire-resistant and coloured red for clear identification. Non-fire-resistant cable — even if mechanically protected — is no longer compliant under the new standard.
Updated Zone Plans Now Mandatory
Up-to-date zone charts are now a mandatory part of fire alarm installations in multi-zone buildings — no longer optional. All zone plans must be kept current and displayed at the control panel.
Enhanced Protection for Sleeping Premises
L2 systems must now account for sleeping risk in addition to risk-assessed rooms. L4 systems now require detection at the top of lift shafts. Residential care premises must have automatic notification to a monitoring centre.
Engineer CPD Now Required
Anyone working on fire alarm systems must now demonstrate ongoing Continuing Professional Development (CPD). When choosing a fire alarm company in Bristol, ask for evidence of up-to-date engineer training and CPD records.
New Certificates and Documentation
Due to widespread clause renumbering throughout the standard, all installation and service certificates must now use updated templates. A new dedicated section covers extensions and modifications to existing systems.
Is your fire alarm system BS 5839-1:2025 compliant?
If your system was installed or last serviced before April 2025, contact CJS Fire & Security for a compliance review. We'll assess your system against the new standard and advise on any updates required.
Call 0117 251 0590Why Choose CJS Fire & Security for Fire Alarms in Bristol?
Bristol-Based Engineers
We're based on Unity Street in Bristol city centre — not a national company dispatching engineers from hours away. When you need us, we're nearby.
BS 5839 Compliant Installations
Every fire alarm system we design and install fully complies with BS 5839-1:2025, the current British Standard for fire detection and alarm systems in non-domestic buildings.
Free Site Survey
We visit your premises, assess your specific risks and layout, and specify the right system for your building — at no cost and with no obligation to proceed.
No Subcontractors
Every installation and service visit is carried out by our own directly employed engineers. You get the same quality and accountability on every visit.
Honest, Straightforward Advice
We'll tell you what your building actually needs — not the most expensive option. If a simpler system will do the job properly, we'll say so.
Ongoing Support
We offer maintenance contracts, emergency callout cover and long-term support to keep your system compliant and functioning year-round.
Fire Alarm Legal Requirements for Bristol Businesses
Under the Regulatory Reform (Fire Safety) Order 2005, all non-domestic premises in England — including every business and commercial property in Bristol — must have an appropriate fire detection and warning system in place.
The current British Standard governing fire alarm systems in non-domestic buildings is BS 5839-1:2025, which came into force on 30th April 2025. This standard sets out requirements for the design, installation, commissioning and maintenance of fire detection and alarm systems, and is directly referenced in Building Regulations Approved Document B.
Fire alarm servicing is a legal requirement. Under BS 5839-1:2025, commercial fire alarm systems must be serviced by a competent engineer at least every six months, with weekly manual call point tests carried out by the building's responsible person. Failing to maintain your system can invalidate your insurance, result in enforcement action from the fire and rescue service, and leave your building's occupants unprotected.
CJS Fire & Security can help ensure your Bristol premises is fully compliant. Call us on 0117 251 0590 for advice.
Key Legislation
- Regulatory Reform (Fire Safety) Order 2005
- BS 5839-1:2025 — Fire Detection & Alarm Systems (Non-Domestic) — in force April 2025
- BS 5839-6:2019+A1:2020 — Domestic Premises
- Building Regulations 2010 — Approved Document B
- Fire Safety Act 2021
Fire Alarm Installation Across Bristol & the South West
CJS Fire & Security are based in Bristol city centre and install and maintain fire alarm systems across the whole of Bristol and the surrounding area. We regularly work in:
Not on the list? Call us — we likely cover your area.
Frequently Asked Questions — Fire Alarms Bristol
Get a Free Fire Alarm Quote in Bristol
Whether you need a new fire alarm system installed, your existing system serviced, or you're not sure what your Bristol premises requires — we're here to help. Call us for a free, no-obligation conversation with one of our engineers.
Get a Free QuoteWe aim to respond to all enquiries within 2 hours during business hours.