5 Best Fire Alarm Systems in London (2026)

Independently ranked by our review of ratings, reviews and reputation · How we chose

By Brad Smith, Home Services Expert · ✓ Data verified August 2026 · 8 min read

A fire alarm panel that starts flashing fault lights on a bank holiday is not a problem that waits for business hours. London's top fire alarm and fire safety companies have logged nearly 400 Google reviews between them, and most of them hold ratings of 4.8 or higher, so the real question for a London fire alarm system isn't quality, it's who actually turns up when the panel goes off.

Short answer: SatFocus Security Systems Expert leads on volume with 4.9 stars across 203 reviews, covering alarms, CCTV and fire and intruder system installation across Greater London. Astoria Fire & Security holds a perfect 5.0 (62 reviews) and specialises specifically in BAFE-accredited fire alarm installation, maintenance and fire risk assessments for commercial premises. Get a free site survey before comparing quotes, since most companies here offer one.

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1. SatFocus
2. Astoria | Fire Alarm I…
3. Fire Risk Assessment
4. London City Fire (UK)…
5. A2Z Fire & Electrical
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How London's Fire Alarm Companies Compare

#	Business	Rating	Reviews	Best for
1	SatFocus - Security Systems Expert	4.9 ★	203	Combined security & fire systems	View ›
2	Astoria \| Fire Alarm Installation & Maintenance London	5.0 ★	62	BAFE-accredited fire alarm specialist	View ›
3	Fire Risk Assessment	4.9 ★	48	Fire risk assessments	View ›
4	London City Fire (UK) Limited	4.8 ★	48	Fire alarms & fire door compliance	View ›
5	A2Z Fire & Electrical	4.8 ★	35	Fire alarms & electrical combined	View ›

5 Best Fire Alarm Systems in London (2026)

Our top picks, reviewed

#1 Overall🕑 Open 7 days↩ Responds to reviews

SatFocus - Security Systems Expert

4.9203 Google reviews

SatFocus Security Systems Expert, based in Harrow and covering all of Greater London, installs CCTV, intruder alarms, door entry and access control systems for residential and commercial clients, with fire and intruder alarm work handled as part of its broader security installation service. It offers same-week fitting and a free site survey and quote for new work.

What people praise

Deepest review base on this page by a wide margin
Reviewers repeatedly praise clean, tidy installs with wiring hidden using trunking
Technicians take time to walk clients through how to use and configure their new system
Fast, responsive quoting and same-week installation reported by multiple reviewers

Worth knowing

A general security installer rather than a fire-alarm-only specialist, so confirm fire-specific compliance certification for commercial jobs

Reputation scorecardrank in London

Rating4.9 / 5

Review volume203 · 97th

Confidencehigh

Recency5 weeks ago

Info completenesssite · phone · hours

Rating breakdown97% 5-star

✓ VerifiedSource: Google

Our take: The most-reviewed name on this page and a genuinely broad security and fire installer. A strong first call for combined CCTV, intruder and fire alarm work, especially for residential and small commercial jobs.

Website +442084227918 Directions

#2🕑 Open 5 days/wk↩ Responds to reviews

Astoria | Fire Alarm Installation & Maintenance London

5.062 Google reviews

Astoria, based in Clerkenwell, is a BAFE-accredited fire protection company offering fire alarm installation, maintenance and fire risk assessments specifically for London businesses, alongside CCTV and access control. It supports restaurants, offices, hospitality venues, warehouses and other commercial properties with compliant systems and ongoing maintenance contracts.

What people praise

Perfect 5.0 rating across every review on file
BAFE accreditation, a recognised fire industry standard, specifically named in its marketing and reviews
Reviewers describe genuine emergency call-outs, including on Boxing Day
Maintenance service includes engineer call-outs at no extra charge, per one detailed review

Worth knowing

Standard business hours only, Monday to Friday, so plan ahead for scheduled maintenance

Reputation scorecardrank in London

Rating5 / 5

Review volume62 · 92th

Confidenceearly

Recency6 months ago

Info completenesssite · phone · hours

Rating breakdown98% 5-star

✓ VerifiedSource: Google

Our take: The specialist pick for commercial fire alarm compliance. A perfect rating, a recognised industry accreditation and reviewers describing real emergency response make this the safest choice for a business that needs to stay legally compliant.

Website +442070995552 Directions

Office 401, Clerkenwell Workshops, 27-31 Clerkenwell Close, London EC1R 0AT

#3🕑 Open 5 days/wk↩ Responds to reviews

Fire Risk Assessment

4.948 Google reviews

Fire Risk Assessment, based near Chancery Lane, focuses specifically on fire risk assessments, fire alarm testing to BS 5839 standards, asbestos surveys and fire door surveying for UK businesses, with a stated 24-hour turnaround for urgent assessments. Its site notes UKAS accreditation and PAS 79 and RRO 2005 compliance.

What people praise

Detailed, technical assessment reports praised for being thorough yet easy to follow
Fast response to follow-up questions, including via email and video calls
Punctual site visits with correct tools and PPE noted by reviewers
24-hour turnaround offered for urgent compliance needs

Worth knowing

Focused on assessments and testing rather than full alarm system installation

Reputation scorecardrank in London

Rating4.9 / 5

Review volume48 · 83th

Confidenceearly

Recency9 months ago

Info completenesssite · phone · hours

Rating breakdown98% 5-star

✓ VerifiedSource: Google

Our take: The specialist for the compliance paperwork side of fire safety, a fire risk assessment or BS 5839 testing report, rather than a full installation job. Useful alongside an installer if you need both.

Website +442030511294 Directions

7 Bell Yard, London WC2A 2JR

#4🕑 Open 5 days/wk↩ Responds to reviews

London City Fire (UK) Limited

4.848 Google reviews

London City Fire (UK) Limited, based in Nine Elms, supplies and installs fire alarms alongside broader electrical and lighting work, and has carried out fire door and doorframe replacement projects for residential blocks to meet post-Grenfell fire safety legislation. It works with both commercial clients and residential freeholders managing compliance upgrades.

What people praise

Experience with complex, multi-flat fire door replacement projects under Section 20 procedures
Reviewers describe punctual, professional teams that clean up thoroughly after finishing
Named staff, including office coordination, praised for keeping clients updated on legal requirements
Handles both fire alarm installation and building-wide fire safety upgrades

Worth knowing

One reviewer flagged a review left about a fire door replacement rather than fire alarm work specifically, so confirm current fire alarm capacity when you call

Reputation scorecardrank in London

Rating4.8 / 5

Review volume48 · 83th

Confidenceearly

Recency5 weeks ago

Info completenesssite · phone · hours

Rating breakdown94% 5-star

✓ VerifiedSource: Google

Our take: A strong option for larger residential blocks or freeholders navigating post-Grenfell fire door and alarm compliance, with real experience managing multi-leaseholder projects.

Website +447893933533 Directions

Unit 2, Michael Manley Industrial Estate, Unit 2 Clyston St, Nine Elms, London SW8 4TU

#5🕑 Open 7 days↩ Responds to reviews

A2Z Fire & Electrical

4.835 Google reviews

A2Z Fire & Electrical, based in Stratford, combines general electrical services, including rewiring and lighting, with fire alarm installation and maintenance for homes and businesses. Reviewers describe both types of work, from fixing intermittent power trips to fitting fire alarm sensors as part of a wider job.

What people praise

Responsive, answering calls quickly and arriving fast for urgent electrical issues
Diligent, systematic fault-finding praised specifically by more than one reviewer
Careful with property and furnishings during electrical work
Combines fire alarm work with general electrical services under one contractor

Worth knowing

One detailed review described a fire alarm installation where sensors weren't tested with a heat gun or smoke spray before sign-off, and aftercare communication was slow to resolve it

Reputation scorecardrank in London

Rating4.8 / 5

Review volume35 · 75th

Confidenceearly

Recency6 months ago

Info completenesssite · phone · hours

Rating breakdown94% 5-star

✓ VerifiedSource: Google

Our take: A useful combined electrical and fire alarm option for smaller jobs, but the one detailed fire-alarm-specific review is worth reading closely. Ask directly how sensors are tested and signed off before booking fire alarm work here.

Website +442034222999 Directions

1 Sugar House Ln, London E15 2QS

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How we score

Every number on this page comes from public Google data on the date shown, not from opinion or payment. Rating is the business’s live Google star average. Review volume is how many customers have rated them, ranked against other London fire alarm and fire safety companies. Confidence weighs the rating by that volume, so a 4.9 from 203 people carries more weight than a 5.0 from a smaller sample. Recency reflects how recently customers are still leaving reviews. No business can pay to change these numbers.

How much does a fire alarm system cost in London? (2026)

None of the companies on this page publish fixed fire alarm installation or maintenance rates online, since pricing depends on building size, the number of zones and detectors needed, and whether it’s a new commercial install or a residential retrofit. Most offer a free site survey, so get a written quote from that visit before comparing companies.

Serving all of London

The companies above cover Greater London, with bases in Harrow, Clerkenwell, near Chancery Lane, Nine Elms and Stratford. Searching for a fire alarm system near me? Every listing below shows a live phone number and address so you can reach the closest option fast.

What to ask before you hire a fire alarm company

Are you BAFE accredited, or certified to BS 5839 standards?
Do you offer a free site survey before quoting?
Is ongoing maintenance included, or billed separately as an annual contract?
How are sensors and detectors tested before sign-off?
What is your emergency call-out response time, and is there an extra charge?
Can you provide the compliance documentation my landlord or insurer requires?

Frequently asked questions

How did you choose these fire alarm companies?

We started from fire alarm and fire safety companies in London with a public Google presence, then ranked by rating, review volume, consistency and recency. See How we score above.

Are these rankings paid?

No. Rankings come from the public Google data in the scorecard. A business can pay to be a Featured Partner, which adds a badge and top placement, but that never changes another business’s score or position on the underlying data.

How often is this updated?

The data carries a verified date (August 2026 on this page). We refresh listings periodically so ratings and review counts stay current.

What does BAFE accreditation mean?

BAFE is a UK fire industry accreditation scheme that certifies a company meets recognised standards for fire alarm installation and maintenance. Astoria specifically names this accreditation, which is worth asking about for any commercial fire alarm job.

Do I need a fire risk assessment as well as a fire alarm system?

For most commercial properties in the UK, yes. A fire risk assessment identifies what fire safety measures a building needs, while the alarm system is one part of meeting those requirements. Fire Risk Assessment on this page specialises in that assessment step.

The bottom line

Astoria is the safest default for a commercial fire alarm install thanks to its BAFE accreditation and perfect rating, while SatFocus is the stronger pick if you want fire, intruder and CCTV covered by one installer. Whoever you call, ask for BAFE or BS 5839 credentials and a written quote from an on-site survey before signing.

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