6 Best Alarm & Security Installers in Stevenage for 2026
🚨 6 businesses·📍 Stevenage
✓ Reviewed regularly·✓ Updated 8 September 2026
Written by Mark Reid,
Trades Editor ·Verified 8 September 2026
Stevenage's mix of housing tells you a lot about why security work varies so much from job to job. The older terraces around Old Town have narrow hallways and period doors that need careful thought when fitting alarm panels or door contacts, while the newer estates out towards Chells and Great Ashby often come with plastic soffits and modern wiring that make CCTV and smart alarm installs more straightforward. Then there's the town centre flats and the business units around Gunnels Wood Road, where security installers are just as likely to be fitting access control systems or shutter alarms as a standard home burglar alarm. Local installers who know these patterns tend to work faster and spot issues, like where a cable run needs to avoid a cavity wall or how to keep a keypad out of direct sun on a south-facing porch.
The businesses featured here are pulled from public business listings and ranked using their review rating and the number of reviews they've built up, with a small boost given to those showing a working website and phone number. We also read through each business's homepage to check that alarm and security installation is genuinely what they do day to day, which stops general electricians or unrelated tradespeople slipping onto a page like this. Any listing flagged as permanently closed gets removed automatically as part of that process. Where you spot a Trust Verified badge, that business has gone further and passed our full verification, covering trade qualifications and accreditations, public liability insurance, trading history, customer review history and registered company information; our How We Verify page sets out exactly what that involves. For businesses without the badge, those checks haven't been done by us, so it's worth working through them yourself before you book anyone.
Before signing off any quote, ask what standard the alarm system is fitted to and whether the installer can provide a certificate of conformity once the job's done, particularly if you need it for insurance purposes. Check whether they're recommending a monitored or unmonitored system and get a clear breakdown of any ongoing monitoring fees, since these can add £15 to £30 a month on top of the install cost. It's also worth asking how they handle callouts if a sensor fails or a system needs resetting after a power cut. Getting two or three quotes is standard practice for security work, not just to compare price but to see how thoroughly each installer surveys your property and explains their recommendations before any money changes hands.
How We Select & Rate The Best Alarm & Security Installers in Stevenage
Rankings on this page are based on public business listings, using each business's review rating and number of reviews as the main factor, with a small lift given to those with a working website and phone number. We check each business's homepage to confirm alarm and security installation is their main line of work, and we remove any listings showing as permanently closed. Businesses marked Trust Verified have gone through our full verification process, covering trade qualifications and accreditations, public liability insurance, trading history, customer review history and registered company information; see our How We Verify page for the complete list. Other businesses shown here haven't been independently verified by us, and appearing on this page isn't an endorsement. Always carry out your own checks before hiring.
Recommended and Featured listings are paid placements, so a business's fee affects whether and where it appears. Every other listing is ranked on rating and review count from third-party business listings. How we rank & verify →
Quick Comparison: Alarm & Security Installers in Stevenage
Stevenage households and businesses form the core of Primis Installations Ltd's alarm and security work, with the SG2 postcode among the areas covered. The firm fits and maintains intruder alarms and related security systems, having built up a rating of 4.9 from 74 reviews. Enquiries are handled through its website.
Resistance Fire and Security Systems Ltd installs fire and security systems for homes and businesses around Stevenage. Work spans alarm systems, CCTV and fire safety equipment, with 58 Google reviews giving a five-star average. The company's name reflects its focus on protection against both intrusion and fire risk.
Families across Stevenage looking to keep an eye on their property turn to Link CCTV Systems for camera and alarm installations. The firm holds a 4.9 rating from 15 reviews, reflecting consistent workmanship on domestic security setups. Its base in SG1 puts it within easy reach of households throughout the town and surrounding areas.
Apollo Security Division installs and maintains alarm systems and CCTV for homes and businesses across Stevenage. Work covers system design, fitting and ongoing servicing rather than one-off jobs, and the firm holds a 4.7 rating from 19 reviews. Clients in SG1 and surrounding areas can arrange call-outs directly through its website.
Calls to BES Electric often start with an ageing burglar alarm that keeps false-triggering, or a home needing CCTV added after a spate of local break-ins. The Stevenage firm assesses existing wiring before recommending new sensors or cameras, rather than replacing systems wholesale. It holds a 4.5 rating from 19 reviews.
thinkingbricks Limited works as an alarm and security installer serving Stevenage, fitting systems for homes and businesses in the area. Reviewers have given the firm a full five stars across seven reviews, pointing to consistent standards on installation jobs. Enquiries can be made through the company's website for further detail on the range of security work undertaken.
Transparency notice: Recommended and Featured listings are paid placements, so a business's fee affects whether and where it appears. All other listings are ranked by a combined score drawn from ratings and review counts published on third-party business listings, plus basic completeness signals such as a working website and phone. A Trust Verified badge means we have independently checked that business's documents; businesses without it have not been independently verified by us. How we verify →
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How much does an alarm & security installer cost in Stevenage?
A basic wired burglar alarm for a three-bedroom semi in areas like Bedwell or Broadwater typically costs between £300 and £600 fitted, while a wireless smart alarm system with app control can run from £400 to £900 depending on the number of sensors. CCTV installation with two or three cameras usually sits between £350 and £700, rising if you want higher-resolution cameras or longer cable runs for a detached property. Monitored systems add ongoing fees, often £15 to £30 a month. Prices vary based on property size, whether you want smart home integration, and how much rewiring is needed, so getting two or three quotes before committing is sensible.
Do I need planning permission to fit CCTV cameras on my house in Stevenage?
For most residential properties you don't need planning permission to fit CCTV, provided the cameras only cover your own property and don't point directly into a neighbour's garden or windows. If you're in a listed building or conservation area, which includes parts of Old Town, it's worth checking with Stevenage Borough Council before drilling into brickwork or period features. A good installer should also advise on angling cameras to stay compliant with data protection rules if you're capturing footage of a shared driveway or public pavement.
How long does it take to install a burglar alarm or CCTV system?
A standard wired alarm install usually takes a full day for an average semi-detached house, while a wireless system can often be fitted in three to four hours since there's less cabling involved. CCTV setups depend on the number of cameras and cable runs, but two to three cameras typically take half a day to a full day. Larger properties, or jobs involving access control for a business unit, can take two days or more, especially if walls need chasing for cables.
Should I choose a monitored or unmonitored alarm system?
A monitored system alerts a monitoring centre when triggered, and they'll contact you or the keyholder, and in some cases the police, which suits people who travel a lot or want extra reassurance. An unmonitored system sounds an alarm locally and sends alerts to your phone but relies on you or a neighbour reacting. Monitored systems cost more upfront and come with monthly fees, so it's worth weighing that against how often you're actually at home and how quickly neighbours would notice an alarm going off.
Will a burglar alarm or CCTV system reduce my home insurance premium?
Some insurers offer a discount for a professionally installed and monitored alarm system, particularly one meeting British or European standards like EN 50131. The discount is usually modest, often 5 to 10 percent, and varies significantly between insurers, so it's worth checking with your provider before assuming it'll cover the installation cost. Ask your installer for documentation confirming the standard the system meets, since most insurers will want to see this.
How do I check whether an alarm and security installer in Stevenage is reliable before booking?
Ask to see evidence of relevant accreditations, such as NSI or SSAIB certification, and check they carry public liability insurance, ideally at least £2 million cover. Read through recent customer reviews rather than just the overall star rating, since patterns in the comments often reveal how they handle problems after installation. Ask how long they've been trading locally and request a couple of references from recent Stevenage jobs if possible. Finally, get a written quote detailing exactly what's included, any monitoring fees, and what happens if a fault develops after the work's finished.
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