Security systems installers to acquire in Northern Ireland

Name: Security systems installers to acquire in Northern Ireland
Creator: Firmbase
License: https://firmbase.co/terms

Updated 9 November 2026

Looking to acquire a security systems installer in Northern Ireland? Firmbase ranks 33 security systems installers using public company information to help buyers prioritise firms for research and potential outreach. The Approach Score ranks firms using public signals including director age and tenure, ownership, business scale, financial strength and recent changes. These firms are not listed for sale, and the ranking does not indicate that an owner is considering a sale.

The median firm has 11 staff and has been in business for 9 years; 1 firm is owned by a group that has acquired several firms in this sector. Looking beyond Northern Ireland? Explore the full UK list of security systems installers.

Firms

UK 1,024

19%

Every director 55+

UK 24%

27%

Held 75%+ by one person

UK 29%

Median years in business

UK 15

Median headcount

UK 9

£500k to £1m

Median turnover band

UK £500k to £1m · includes our estimates

1 firm owned by 1 group that has bought several firms in this sector. That is 3% of this list, against 1% across the UK.

The first 25 firms, in Approach Score order

Rank	Firm	Approach Score	The facts behind the score
1	PLS Security Belfast	Approach Score 85/100	Director aged 70 or over · in post since 2017 1 individual holds 75%+ · independent More about this firm 6 staff · turnover est. £319k Net assets £103k (Oct 2025) Company no. NI648632 · Companies House padlock-security.co.uk
2	Breezemount Newtownards	Approach Score 81/100	1 director aged 70 or over, 1 aged 60-64 · longest in post since 1976 2 individuals hold 50%+ · independent More about this firm 23 staff · turnover est. £1.3m Net assets £681k (Sep 2025) Company no. NI011299 · Companies House breezemount.net
3	JMM Fire and Security Coleraine	Approach Score 79/100	Director aged 55-59 · in post since 2017 1 individual holds 75%+ · independent More about this firm 6 staff · turnover est. £717k Net assets £232k (Jan 2026) Company no. NI643196 · Companies House jmmfireandsecurity.com
4	ESS	Approach Score 76/100	1 director aged 70 or over, 1 aged 55-59, 1 aged 50-54 · longest in post since 1998 1 individual holds 75%+ · independent More about this firm 55 staff · turnover est. £5.4m Net assets £4.5m (Mar 2025) Company no. NI034367 · Companies House ess-security.co.uk
5	North Time & Data Lisburn A director sits on 4 or more companies	Approach Score 73/100	1 director aged 65-69, 1 aged 60-64, 1 aged 50-54, 1 aged 45-49 · longest in post since 1988 Corporate owner More about this firm 23 staff · turnover est. £1.4m Net assets £945k (Jan 2026) Company no. NI022135 · Companies House ntdltd.com
6	Johnston Security Bangor, Down	Approach Score 72/100	In post since 2012 2 individuals hold 75%+ · independent More about this firm 6 staff · turnover est. £464k Net assets £29k (Apr 2024) Company no. NI611763 · Companies House johnstonsecurityltd.com
7	BHP Security Systems Derry	Approach Score 71/100	Director aged 60-64 · in post since 2001 Independent More about this firm 40 staff · turnover est. £1.6m Net assets £778k (Mar 2025) PSC register changed Jul 2026 Company no. NI041019 · Companies House bhpalarms.com
8	Superior NI Larne	Approach Score 69/100	Director aged 50-54 · in post since 2019 1 individual holds 75%+ · independent More about this firm 10 staff · turnover est. £1.6m Net assets £1.5m (Jan 2025) Director resigned Nov 2025 Company no. NI658666 · Companies House
9	Portadown Locksmiths Portadown, Co. Armagh	Approach Score 67/100	1 director aged 65-69, 1 aged under 45 · longest in post since 2004 Corporate owner More about this firm 13 staff · turnover est. £777k Net assets £708k (Mar 2026) PSC register changed May 2026 Company no. NI051519 · Companies House portadownlocksmiths.co.uk
10	BDI Security & Electrical Newtownabbey	Approach Score 67/100	1 director aged 55-59, 1 aged 50-54 · longest in post since 2005 Independent More about this firm 7 staff · turnover est. £399k Net assets £121k (Mar 2025) Company no. NI056215 · Companies House bdi-security.com
11	SCT Limavady	Approach Score 66/100	1 director aged 60-64, 1 aged under 45 · longest in post since 2019 1 individual holds 75%+ · independent More about this firm 7 staff · turnover est. £288k Net assets £21k (Oct 2024) Company no. NI665068 · Companies House sct-ni.com
12	South Antrim Alarms Ballinderry Road, Lisburn	Approach Score 65/100	1 director aged 70 or over, 2 aged 50-54, 1 aged 45-49 · longest in post since 1979 Independent More about this firm 10 staff · turnover est. £366k Net assets £195k (Dec 2025) Company no. NI013708 · Companies House southantrimalarms.co.uk
13	Quaypoint Security Newry, County Down	Approach Score 62/100	Director aged 50-54 · in post since 2019 2 individuals hold 50%+ · independent More about this firm 5 staff · turnover est. £698k Net assets £854k (Oct 2025) Company no. NI664746 · Companies House quaypointsecurity.com
14	VIS Security Solutions Belfast A director sits on 4 or more companies	Approach Score 61/100	We hold older figures than Companies House 2 directors aged 55-59, 1 aged 50-54 · longest in post since 2005 2 individuals hold 75%+ · independent More about this firm 45 staff · turnover £9.6m Net assets £8.4m · newer accounts made up to Mar 2025 Company no. NI022462 · Companies House vis-security.com
15	RS 5 Star Security Limavady	Approach Score 59/100	1 director aged 50-54, 1 aged under 45 · longest in post since 2019 2 individuals hold 50%+ · independent More about this firm 9 staff · turnover est. £739k Net assets £186k (Dec 2025) Company no. NI666708 · Companies House rs5starsecurity.com
16	HES Alarms Craigavon, Co. Armagh	Approach Score 59/100	1 director aged 50-54, 1 aged under 45 · longest in post since 2022 1 individual holds 75%+ · independent More about this firm 8 staff · turnover est. £889k Net assets £324k (Jul 2025) Company no. NI689746 · Companies House hesalarms.com
17	Nmfs Newry, Co Down	Approach Score 58/100	Director aged under 45 · in post since 2014 1 individual holds 75%+ · independent More about this firm 5 staff · turnover est. £302k Net assets £175k (Jul 2025) Company no. NI625518 · Companies House
18	G P Electrical & Security Enniskillen, CO. Fermanagh	Approach Score 57/100	We hold older figures than Companies House 1 director aged 55-59, 1 aged 50-54 · longest in post since 2019 2 individuals hold 50%+ · independent More about this firm 19 staff · turnover est. £1.8m Net assets £155k · newer accounts made up to Mar 2026 Company no. NI660025 · Companies House gpelectricalandsecurity.com
19	Advanced Overwatch Coleraine	Approach Score 54/100	Director aged 45-49 · in post since 2017 1 individual holds 75%+ · independent More about this firm 5 staff · turnover est. £374k Net assets £37k (Sep 2025) Company no. NI644972 · Companies House advancedoverwatch.com
20	Safe Security (N.I.) Belfast, CO. Antrim. A director sits on 4 or more companies	Approach Score 53/100	We hold older figures than Companies House Director aged 55-59 · in post since 2019 Independent More about this firm 15 staff · turnover est. £859k Net assets £29k (Jun 2020) · newer accounts made up to Jun 2025 Company no. NI662470 · Companies House safesecurityni.com
21	Delta Security Systems (N.I.) Newtownabbey	Approach Score 50/100	We hold older figures than Companies House Director aged 45-49 · in post since 2017 2 individuals hold 75%+ · independent More about this firm 10 staff · turnover est. £267k Net assets £822k (Sep 2021) · newer accounts made up to Sep 2025 Company no. NI645819 · Companies House deltacomms.co.uk
22	BCM Security Limavady	Approach Score 49/100	We hold older figures than Companies House 2 directors aged under 45 · longest in post since 2015 2 individuals hold 50%+ · independent More about this firm 10 staff · turnover est. £555k Net assets £36k (Nov 2021) · newer accounts made up to Nov 2025 Director resigned Jun 2026 Company no. NI634619 · Companies House bcmsecurity.co.uk
23	Safe Security (belfast) Belfast A director sits on 4 or more companies	Approach Score 46/100	Director aged 55-59 · in post since 2024 Corporate owner More about this firm 23 staff · turnover est. £10k No net assets figure held · accounts made up to Sep 2025 Company no. NI721020 · Companies House barringtonsecurity.co.uk
24	Diamond Systems Belfast	Approach Score 46/100	2 directors aged 70 or over, 2 aged 45-49 · longest in post since 1993 2 individuals hold 50%+ · independent More about this firm 12 staff · turnover est. £547k Net assets -£40k (Dec 2025) Company no. NI028033 · Companies House diamondsystems.co.uk
25	SIA Fire & Security Solutions Belfast	Approach Score 45/100	2 directors aged under 45 · longest in post since 2023 2 individuals hold 50%+ · independent More about this firm 11 staff · turnover est. £469k Net assets £86k (Jul 2025) Director resigned Apr 2025 · PSC register changed Apr 2025 Company no. NI695058 · Companies House

8 more firms are in the list, in Approach Score order.

You're seeing the first 25. Buy all 33 for £799 + VAT, with the facts behind each score, director names, shareholders and financials.

Buy the list of all 33 firms, with director names, ages and shareholders

Each row comes with the facts behind its score, financials with dates and contact details.

What's in the file

One row per firm, in Approach Score order, as Excel + CSV.

It holds the facts behind each score, points for each part of the score, financials with dates, publicly available contact details, where identified, director names and named shareholders.

Some people with significant control appear as Other individual, with no further detail. Director email lookups are not included.

How this list is filtered

5 or more staff, from filed headcount or our estimate where none is filed.
Registered office in Northern Ireland.

See every filter on the UK list

How this list is built

The Approach Score ranks firms mainly on public Companies House information about owner tenure and age, ownership, size, financial strength and recent register changes.

Firms with higher scores appear first in each list.

Use the ranking to order research, then check each business directly.

Read how the Approach Score works

What it does not mean

No firm here is for sale, and the score says nothing about any owner's plans.

At least 95% of the firms where we hold directors had them checked in or after November 2026.

What we do not cover

Regulatory information is not included in this list. Buyers should check the relevant register as part of their due diligence. The Security Industry Authority does not license alarm installation. Verify any claimed voluntary certification and its scope in the certifying body's directory, such as NSI's or SSAIB's; check SIA licences separately for guarding or key holding.

Why age bands but no people's names

Age bands come from the month and year of birth on Companies House. This page shows no exact ages and no people's names. Both come with the purchased list. The band edges from 45 to 65 are the ages where the score changes. A row shows no age bands when a director's surname is in the firm's name, its group's name or its website. Those directors' ages still count towards the score.

Is this your firm?

You can ask us to take it off every acquisition page, and out of every list we sell after that. Give us your name and work email, and we send you a link to confirm. If your email address is on the firm's own website domain, the firm comes off once you confirm. If it is not, a person reviews your request first. A list already sold stays with its buyer.

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The standard Firmbase list

Access Control Companies in the UK