Basic wireless burglar alarm (1–2 bed flat)
£299–£499Control panel, 2–3 PIRs, door contact, external bell box. No monitoring.
Standard domestic alarm (2–4 bed house)
£450–£799Control panel, 4–6 PIRs, door/window contacts, external and internal sirens.
Full home security package (alarm + basic CCTV)
£899–£1,499NSI alarm system + 4-camera 1080p CCTV system with NVR and remote viewing.
Commercial alarm system
£800–£2,500+Grade 2–3 system, multi-zone panel, ARC monitoring. Price varies significantly by size.
Fire alarm (domestic/HMO)
£299–£699BS 5839-6 Category LD2 system. Mains-powered interlinked detectors.
ARC monitoring (annual)
£180–£300/year24/7 NSI-approved monitoring, keyholder notification, police response capability.
Prices are indicative averages for London in 2024. Final costs depend on property-specific factors and will be confirmed in your free written quotation.
What Affects the Price?
The main factors affecting alarm installation costs in London are: the number of detection zones required (directly related to property size), the type of system (wireless systems often cost slightly more for components but less for labour), the grade of system required by your insurer, access difficulty in older buildings, and whether monitoring is included.
Getting Accurate Quotes
The only way to get an accurate price for your specific property is a free on-site survey. Be wary of companies that quote prices over the phone without seeing your property — the final bill often diverges significantly from telephone estimates. Sure Alarms provides a free survey and a fixed, itemised written quotation before any work begins.
Get a Free Fixed-Price Quote
No hidden costs. Survey and written quotation at no charge.