BS 5839 Compliant · NSI Approved

Fire Alarm Installation in London

Sure Alarms designs, installs and maintains BS 5839 Part 1 and Part 6 compliant fire alarm systems for London homes, HMOs, offices and commercial premises. Early warning saves lives — our NSI-approved systems ensure your property meets all legal requirements.

EN54 fire alarm hub unit installed by Sure Alarms London
NSI / SSAIB Approved

Fire Detection System — Online

24/7 monitoring · London ARC

Fire Alarm Services

Fire Alarm Standards Explained

BS 5839 Part 1 covers fire detection and alarm systems for commercial buildings. BS 5839 Part 6 covers domestic premises. Both standards define Categories of protection — from Category LD3 (protection of escape routes only) up to Category LD1 (full building coverage including roof voids and floor voids).

Our fire alarm engineers carry out a fire risk assessment alongside the system design to ensure the correct category and detector types are selected. Ionisation, optical and heat detectors all have different response characteristics — the right choice depends on the use of each room.

HMO Fire Alarm Requirements in London

HMO (House in Multiple Occupation) landlords in London are legally required to install a mains-powered, interlinked fire alarm system to BS 5839-6, Category LD2 as a minimum. Local authority requirements vary — some London boroughs require higher categories. We work with landlords across all 32 boroughs to ensure full compliance.

Get a Free Fire Alarm Survey

Covering all London boroughs. Residential and commercial.

We respond within 2 hours. No obligation. NSI/SSAIB approved.

Pyronix Cloud Home Alarm System Kit
No Monthly Charges Alternative

Take Control With a Pyronix Home System

£699 — Full Installation

Not happy paying Verisure's monthly subscription? Our Pyronix Home Control System is a one-off purchase — you own it outright with no monthly fees, no contracts and no lock-in. Manage your security right from your phone with the Pyronix Cloud app, and get full professional installation by our NSI-approved engineers for just £699. *T&Cs apply.

Call 0800 130 3418