Wireless alarms
Ajax wireless systems for finished, lived-in homes. No chasing, no redecorating, app control and instant alerts.
Ajax alarm systems →
Wimbledon · Raynes Park · Mitcham · SW19
Burglar alarm installation in Merton
Merton covers substantial houses in Wimbledon Village, Edwardian terraces in South Wimbledon and Raynes Park, interwar semis around Morden and Mitcham, and new flats near Colliers Wood. We design an alarm around your doors, garden and outbuildings, survey the property in person, price it in writing, then fit it and set it up on your phone.
- Installing since 2012
- 3,000+ installations
- 12-month guarantee on the installation
- Covering all of Merton
Alarms we install in Merton
Burglar and intruder alarms, designed for your property
New systems, upgrades of old panels, takeovers of alarms other companies fitted, and servicing — for houses, flats, shops and offices. Every system is designed from a survey of the property, never from a fixed kit.
Wired & hybrid alarms
Texecom and Pyronix wired systems for renovations and new builds, cabled at first fix and installed at second fix.
Texecom alarms →Upgrades & takeovers
Old panel, lost engineer code, or an alarm the last owner left behind? We keep sound wiring and sensors and replace the panel.
Alarm upgrades →Servicing & repairs
Beeping keypads, false alarms, flat batteries and faulty detectors on Texecom, Pyronix, Visonic, Risco and other makes.
Alarm servicing →Designed for the property in front of us
Alarm design for Merton properties
The west of the borough is dominated by Wimbledon's large Victorian and Edwardian houses and the terraced streets running down to Raynes Park. To the east, Morden, Mitcham and Colliers Wood have more interwar semis, terraces and council-built estates, along with newer apartments near the stations. Plot size, side access and whether there is a garage shape every design.
Detached and large semi-detached houses in Wimbledon Village and Wimbledon Park
Bigger homes near the Common and Wimbledon Park often have multiple garden doors, a garage, a garden studio and staff or guest accommodation. The design covers every external door and the full ground floor, uses shock sensors on large glazing and sets outbuildings as their own areas.
- Every external door and ground-floor room covered
- Shock sensors on orangery and bi-fold glazing
- Garden studios armed separately from the main house
Terraces in South Wimbledon, Raynes Park and Colliers Wood
Long streets of two-storey terraces typically have a through lounge, a kitchen back addition and a rear garden. A wireless alarm fitted in a day covers both doors and the ground floor. If there is a flat-roofed extension, the room above it is protected as well, and a loft conversion stays outside the night setting.
1930s semis and estate houses in Morden and Mitcham
Morden's interwar housing, including the Merton side of the St Helier estate, and Mitcham's semis usually have front, back and side doors and a garage or side extension. Contacts go on each door with ground-floor motion cover, and pet-tolerant detectors can be chosen for families with dogs.
- Side extension and utility doors fitted with contacts
- Integral or detached garage brought into the design
- Pet-tolerant detectors for dogs and cats
Existing wired alarms across Wimbledon and Merton Park
Many established homes still have a wired alarm from a previous owner. If the cabling and detectors are sound, the system can be taken over: the old panel and keypad are replaced with a modern one, the working detectors are kept, and the alarm is set up on your phone.
- Existing cables and working detectors reused
- New panel and keypad with app control
- Faulty or obsolete devices replaced only where needed
Merton has around thirty conservation areas, including Wimbledon Village, Merton Park and parts of Mitcham, so check with the council before fixing a bell box or other device to the front of a listed building or one subject to an Article 4 direction.
Guide prices
What a burglar alarm costs in Merton
Starting prices so you can budget. Your exact price comes from the survey and is fixed in writing before anything is booked.
Most homes
Wireless Ajax alarm
From £995 inc VAT
- Finished, lived-in homes
- App control and instant alerts
- Usually fitted in a day
Wired or hybrid alarm
From £1,995 inc VAT
- Renovations and new builds
- Cable already in, or run at first fix
- Texecom, Pyronix or Ajax Hybrid
Alarm upgrade
From £495 + VAT
- New panel and keypad
- Existing wired sensors kept
- Takeovers of other firms' systems
Prices depend on the number of doors, windows and rooms. Anything that adds cost — an outbuilding, long cable runs, scaffolding — is flagged at the survey, never on the day. Monitoring and SIM connectivity are optional extras quoted separately.
How it works
From first call to protected
Free site survey
We walk the property with you and check every door, window and approach before anything is priced.
Fixed written quote
Every device by make and model, the labour and the payment terms. Usually with you within 24 hours.
Installation day
Dust sheets down, tidy cable routes, and every detector walk-tested before we leave.
Handover
App set up on your phones, everyone shown how to arm and disarm, and a completion certificate for your records.
Where we work
Covering every part of Merton
We install burglar alarms across the London Borough of Merton — postcodes SW19, SW20, CR4, SM4 — and the neighbouring boroughs.
WimbledonWimbledon VillageRaynes ParkMordenMitchamColliers WoodSouth WimbledonMerton ParkAll London boroughs →Wandsworth →Sutton →Kingston →
Free, no obligation
Book a free alarm survey in Merton
Tell us a little about the property and what's worrying you. We'll call back the same working day to book a time.
- ✓Call us020 8422 7918
- ✓Emailinfo@satfocussecurity.co.uk
- ✓HoursMon–Fri 8am–6pm · Sat 8am–5pm
FAQs
Burglar alarms in Merton: your questions answered
Can the alarm in my Wimbledon house cover a separate garden studio?
Yes. A garden studio, gym or pool house can be set up as its own area on the same system, so it can be armed while the house is occupied. We check signal strength during the survey and add a wireless repeater if the distance or construction needs it. You see each area's status in the app.
We have an old alarm in our Raynes Park terrace that nobody uses. What can be done?
We test the existing wiring and detectors first. Where they are sound, we replace the control panel and keypad and reuse the rest, which avoids lifting floors or redecorating. You then get phone alerts and app control. If the old system is beyond saving, a wireless replacement is usually fitted in a day.
Does a Morden semi with a side extension need extra detectors?
Side extensions often add a utility door or a second entrance and sometimes a flat roof beneath a bedroom window. Each external door gets its own contact, the extension gets motion cover, and any upstairs room reachable from the flat roof is included. The survey confirms exactly which rooms need detection.
Is professional monitoring necessary for a home alarm in Merton?
It is optional. Every system we fit sends alerts to your phone and to anyone else you add, such as family or a neighbour. Some owners, particularly those away often or with larger properties, add professional monitoring so trained operators respond to an alarm. We explain both options in the written quote.
How much does a burglar alarm cost in Merton?
A wireless Ajax alarm starts from £995 including VAT, a wired or hybrid system from £1,995 including VAT, and upgrading an old panel while keeping your existing wired sensors from £495 + VAT. Your exact price depends on the number of doors, windows and rooms, and is fixed in writing after a free survey.
Wired or wireless — which is right for my home?
If your home is finished and lived in, wireless is usually best: no chasing walls, no redecorating, and most homes are done in a day. If you are renovating, a wired system run at first fix before plastering is the better long-term choice, installed at second fix once decorating is done.
Can you take over or upgrade my existing alarm?
Usually, yes — including systems we did not install. Where the existing wiring and detectors prove sound we keep them and replace the panel and keypad, which costs far less than a new system and can add smartphone control.
What guarantee do I get?
A 12-month guarantee on our installation work, alongside the manufacturer's warranty on the equipment we supply. You also receive a completion certificate for your records.
Ready to protect your Merton property?
Free survey, fixed written price, no obligation.