6 Best Alarm & Security Installers in Slough for 2026
🚨 6 businesses·📍 Slough
✓ Reviewed regularly·✓ Updated 4 September 2026
Written by Mark Reid,
Trades Editor ·Verified 4 September 2026
Slough's housing mix throws up a real range of security jobs, from Victorian terraces around Chalvey with tricky old wiring, to newer estates near Britwell where developers often fit basic contractor-grade alarms that owners want upgrading. Then there's the flats and maisonettes near the town centre and Slough Trading Estate, where shared entry systems and CCTV for communal areas come into play. A decent installer needs to know their way around all of it, whether that's running a wireless alarm through a 1930s semi in Cippenham or wiring smart cameras into a new-build in Langley without drilling through insulation panels the wrong way.
The businesses featured here are pulled from public business listings and ranked mainly on review rating and review count, with a small boost given to those showing a working website and phone number. We check each firm's homepage to confirm alarm and security installation is genuinely what they do day to day, which stops general electricians or unrelated tradespeople sneaking onto a page like this. Listings flagged as permanently closed get removed automatically as part of that process. Where you spot a Trust Verified badge, that business has gone through our fuller 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. Any business without the badge hasn't been through that process with us, so it's worth doing your own checks before you commit.
Before booking anyone, ask to see their qualifications and whether they're registered with a recognised security body such as the NSI or SSAIB, particularly if you'll need the paperwork for home insurance purposes. Confirm what's included in the price: is monitoring extra, does it cover call-out visits if something trips the alarm at 2am, and what happens if a sensor fails within the first year. It's worth getting two or three quotes for anything beyond a simple bells-only alarm, since prices for smart systems and monitored setups can vary by a few hundred pounds between installers covering the same postcode. A quick check of recent reviews, and a phone call to ask a couple of direct questions, tells you a lot more than a glossy website ever will.
How We Select & Rate The Best Alarm & Security Installers in Slough
Ranking is based on review rating and review count taken from public business listings, with a small lift given to businesses that show a working website and phone number. We check each business's homepage to confirm alarm and security installation is their primary trade, rather than a sideline. Listings marked permanently closed are removed automatically. Businesses carrying a Trust Verified badge have additionally passed our full verification, 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 on this page haven't been independently verified by us, and their inclusion here isn't an endorsement. Always do your own checks before hiring anyone.
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 Slough
Intruder alarm installation forms the core of Securus Alarms Ltd's work in Slough, covering system design, fitting and ongoing monitoring for domestic and commercial properties. The company holds a five-star rating from thirteen reviews, reflecting consistent workmanship. Based in the SL1 area, it serves clients across the town who need wired or wireless systems set up to fit their property's layout.
Global Security (UK) Ltd works largely with commercial units and offices around Slough, fitting alarm systems and access control suited to business premises rather than domestic jobs. The company holds a 4.5 rating from 19 reviews, reflecting consistent standards across installations. Its focus on non-residential properties sets it apart from many local alarm firms.
Inside Out Secure Ltd works mainly with older houses and converted flats around Slough, where rewiring and awkward wall types can complicate alarm fitting. The firm handles installation and setup of security systems suited to these properties, and its five-star record from seven reviews reflects consistent, careful workmanship rather than volume.
SSD Smart AV and Security specialises in integrating CCTV and alarm systems with wider smart home setups, rather than fitting security as a standalone job. Based in Slough, the firm works with clients who want cameras, sensors and access controls tied into one system that can be managed from a single app or panel.
Code 3 Security describes itself as a full-scope security outfit covering both electronic systems and physical guarding. Based in Slough, the company installs CCTV, wireless cameras and intruder alarms alongside manned guarding, keyholding and rapid response. Construction sites feature among the settings it serves, with palisade fencing also listed as part of its offer.
Jas Electrical & Security Services works mainly on older terraced houses and flats around Slough, tackling rewiring and consumer unit upgrades alongside CCTV and alarm installations. The pairing of electrical and security work suits landlords and homeowners dealing with ageing wiring who also want cameras or entry systems fitted at the same time. The business holds a 5 rating from 90 reviews.
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 and security installer cost in Slough?
A basic wireless burglar alarm for a three-bedroom semi typically runs from around £250 to £450 fitted, while a monitored system with a control room connection can push that up to £600 or more, plus an ongoing monitoring fee of roughly £15 to £30 a month. CCTV setups vary hugely depending on how many cameras you want and whether you need remote viewing on your phone, but expect anywhere from £300 for a couple of cameras to over £1,200 for a full multi-camera system with a recorder. Getting two or three quotes is normal practice, especially since prices can differ noticeably between installers covering the same area.
Do I need planning permission to fit CCTV cameras at my house in Slough?
For most homes you won't need planning permission to install CCTV covering your own property, but if a camera points onto a neighbour's garden or a public footpath you could run into data protection or nuisance issues. It's sensible to angle cameras carefully and mention to neighbours what you're installing, particularly on terraced streets where gardens back onto each other closely.
How long does it take to install a burglar alarm or CCTV system?
A standard wireless alarm usually takes half a day to a full day to fit, depending on the size of the property and number of sensors. CCTV installation timing depends on cabling: wireless camera systems can be done in a few hours, but wired systems running cable through walls and lofts might take a full day or two, especially in older properties with solid walls rather than cavity construction.
Should I choose a monitored alarm or a bells-only system?
Bells-only alarms are cheaper upfront and have no ongoing fee, relying on noise to scare off intruders and alert neighbours. Monitored systems cost more monthly but connect to a control room that can alert keyholders or the police, which some insurers favour and may reduce your premium slightly. If you're often away from home, or the property is in a less overlooked spot, monitoring is generally worth the extra cost.
Will a new alarm system affect my home insurance?
Many insurers offer a discount for homes with an approved alarm system, particularly ones installed by an NSI or SSAIB registered company, so it's worth asking your installer for a certificate confirming the standard the system meets. Check with your insurer beforehand about what they'll accept, as some policies specify particular certification levels for higher discounts.
What should I check before choosing an alarm or security installer in Slough?
Ask to see evidence of relevant qualifications and registration with a body such as NSI or SSAIB, and request proof of public liability insurance before any work starts. Read through recent reviews rather than just the star rating, since detailed comments about response times and workmanship tell you more than a number alone. Get a written quote covering exactly what's included, ask how long the warranty on parts and labour lasts, and confirm whether they'll be back promptly if a fault develops after installation.
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