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    Security Red Alert - Security For Life
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    Fire Sprinkler Installation

    BS 9251 Residential and BS EN 12845 Commercial Systems

    Call 24/7: 020 8946 5567
    • Free survey, fixed written quote
    • British Fire Consortium member
    • SafeContractor accredited
    • 20+ years in London

    Request a call back

    Name and number are all we need to arrange a call back and a free survey.

    No obligation. We never share your details.

    • 1
      We reply every day
      weekends too, no waiting until Monday
    • 2
      Free survey
      at a time that suits you
    • 3
      Fixed written quote
      no surprises
    • British Fire Consortium
      Member, Fire Alarm Modules 1 & 2
    • BS 5839 fire alarms
      Certificated every visit
    • Since 2001
      Family-run in SW17
    • 30+ five-star
      Google reviews
    About this service

    How we work

    Sprinklers are the most reliable way to stop a fire before the fire service arrives, and since 2020 they are mandatory in new residential buildings over 11 metres in England. We design, install, commission and maintain sprinkler systems across London, new build and retrofit, single flats to full blocks, with the certification your building control, insurer and fire risk assessor need.

    Fire Sprinkler Installation
    What we offer

    What's included

    • Residential and domestic sprinkler systems to BS 9251:2021
    • Commercial sprinkler systems designed to BS EN 12845
    • New build over 11m, Approved Document B compliance
    • Retrofit sprinklers for blocks of flats, HMOs and care homes
    • Concealed and low-profile heads for finished interiors
    • Water supply survey, tanks and pump sets where mains flow is short
    • Commissioning, certification and handover documentation
    • Annual servicing, testing and maintenance contracts
    Why choose us

    What you get from working with us

    The 11m Rule, Handled

    Since 2020, every new residential building over 11 metres in England needs sprinkler protection. We work with developers and architects early, when a system is far cheaper to design in than to retrofit later.

    Retrofit Without the Upheaval

    Retrofitting occupied blocks is mostly a logistics problem. Concealed heads, planned pipe routes and phased access keep disruption to residents down and the programme predictable.

    Water Supply Solved First

    The single biggest cost driver on any sprinkler job is how it gets its water. We survey mains flow and pressure before quoting, so you find out early whether a tank and pump set is needed, not halfway through the build.

    Accredited & Insured

    SSAIB approved for intruder alarms, working alongside your fire alarm, smoke ventilation and emergency lighting on one coordinated fire strategy.

    Sprinkler Systems We Install

    Residential Blocks Over 11m

    Full BS 9251 coverage for new residential buildings above the 11 metre threshold, coordinated with the fire alarm and smoke ventilation strategy so building control signs off first time.

    Retrofit for Existing Blocks & HMOs

    Sprinkler retrofit recommended by a fire risk assessment, or fitted to allow a building to keep a simultaneous evacuation strategy. Concealed heads and phased works keep occupied flats liveable throughout.

    Commercial & Industrial

    BS EN 12845 systems for warehouses, retail units, offices and light industrial premises, including hazard classification, hydraulic calculation and the pump and tank arrangement the design demands.

    Servicing & Certification

    Annual servicing, valve and pump testing, flow tests and written records. We take over existing systems from other installers and bring lapsed maintenance back into date.

    Frequently Asked Questions

    Are fire sprinklers a legal requirement in UK flats?

    In England, sprinklers are required in all new residential buildings over 11 metres tall, the threshold was lowered from 30m to 11m in 2020. Wales requires sprinklers in all new homes, and Scotland applies wider requirements again. For existing buildings it depends on the fire strategy and fire risk assessment rather than a blanket rule.

    What is BS 9251?

    BS 9251:2021 is the British Standard for fire sprinkler systems in residential and domestic premises. It covers system design, components, water supplies, backflow protection, commissioning, testing and maintenance, and sets out the hazard categories that determine how much water the system must deliver.

    How much does a fire sprinkler system cost?

    Cost is driven mainly by the water supply. If the incoming main has enough flow and pressure the job is comparatively straightforward; if it does not, a storage tank and pump set is needed and that changes the figure significantly. Designing sprinklers in from the start is always cheaper than retrofitting. We survey first and quote a fixed price rather than estimating blind.

    Will all the sprinkler heads go off at once and flood the building?

    No. Sprinkler heads are heat-activated individually, not triggered by smoke, so only the head or heads directly above the fire operate. Most residential fires are controlled by a single head, and a sprinkler discharges far less water than a fire service hose would.

    Do sprinkler systems need annual servicing?

    Yes. BS 9251 sets out routine checks for the responsible person plus a periodic service by a competent contractor, typically annually. We provide the service, the test records and the certification your insurer and fire risk assessor will ask to see.

    Recent work

    Recent jobs, in our customers' words

    30+ five-star Google reviews

    Fire alarm fault

    “Excellent service from start to finish. The team was reliable, professional and extremely knowledgeable. They responded quickly, explained everything clearly, and made sure the issue with the fire alarm was properly identified and resolved. It was a stressful situation, but their calm and professional approach gave me real peace of mind knowing that the fire alarm system was safe and working properly. I would highly recommend this company to anyone looking for a trustworthy, professional and knowledgeable fire alarm service.”

    Rosa · Google review · October 2026

    Fire alarm system, four flats

    “Security Red Alert recently installed a full fire-alarm system across my four flats, and I couldn’t be more impressed. They arrived early in the morning exactly as promised, worked efficiently throughout the day, and completed everything on time with no disruption. The team were professional, polite, and absolutely fantastic from start to finish. Highly recommended — truly a five-star service.”

    Ali Nazaripour · Google review · January 2026

    Home CCTV installation

    “Great experience with the team for home CCTV installation. From quote to installation in under a week and very reasonable prices. Aamir’s installation was quick, clean and took time to talk through the system. Very happy with the final result.”

    Mitul Patel · Google review · October 2026

    Our team

    Qualified engineers, one team from survey to service

    Our own DBS-checked engineers and office team. The engineer who surveys your job installs it and services it, and we hold the British Fire Consortium Fire Alarm Modules 1 and 2, passed with Distinction.

    A

    Akhtar Shah

    Director and Lead Engineer

    Designs, installs and commissions fire alarm systems to BS 5839. Over 20 years in fire and security.

    A

    Aamir Manzoor

    Fire and Security Engineer

    Installation, servicing and CCTV. Named by customers in our Google reviews.

    M

    Mario

    Fire and Security Engineer

    Installation and servicing of fire alarm and security systems.

    A

    Andrea Ferns

    Office Manager

    Bookings, certificates and service reminders, so nothing falls due unnoticed.

    H

    Hassan

    Contracts and Accounts

    Maintenance contracts, managing agents and larger projects.

    DBS checked Employed by us, not subcontractedOur memberships and accreditations

    Arrange a free site survey

    Tell us about the building and we will call you back to book a free, no-obligation survey. You get a fixed written quote after every visit.

    • Free survey, fixed written quote
    • British Fire Consortium member
    • SafeContractor accredited
    • 20+ years in London
    Call 24/7: 020 8946 5567

    Calls answered 24/7, day and night. Forms and quotes answered every day

    Calls answered 24/7, day and night, weekends included

    Call 24/7

    Accredited, approved and trained

    What each one means
    • British Fire Consortium, member, modules 1 & 2Member, Modules 1 & 2
    • SSAIB, approved for intruder alarmsApproved for intruder alarms
    • SafeContractor, accredited contractorAccredited contractor
    • ICO registered, data protection, ref. z1347768Data protection, ref. Z1347768
    • Federation of Small Businesses, memberMember

    We hold the British Fire Consortium Fire Alarm Modules 1 and 2, passed with Distinction, and design, install and service fire alarms to BS 5839.