About from company website
Established over 25 years ago as a family business, J O'Connor has grown into a national operator, becoming a preferred supplier for Housing Associations and large-scale private and commercial projects. The company prides itself on its accreditations, 24/7 response times, and commitment to helping clients meet KPIs, while maintaining the original focus on quality work and excellent customer service. J O'Connor operates nationally, with a strong focus in the South East and Home Counties, serving the Public Sector, Commercial, and Large-Scale Private markets.
They have a long history with the Social Housing sector, providing Contract Gas Services to approximately 10,000 properties annually, ensuring families remain warm and safe with a 100% success rate in CP12 certification. Their engineers hold advanced certifications and the company works with the Government on initiatives like Decent Homes. The company's Electrical Services have seen significant growth, leading to a reputation for high standards in new builds, refurbishments, and retail fit-outs.
They offer a consultative approach, designing, installing, and maintaining electrical services, including first and second fix works, re-wiring, ventilation, and testing. J O'Connor also provides Facilities Management for large residencies, offering a comprehensive mechanical and electrical service.
Services
Works as
Sectors
Accreditations from company website
Clients mentioned from company website
Housing Associations, Local Authority agencies, Government.
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Questions about J O'Connor from the record on this page
What does J O'Connor do?
J O'Connor is a national mechanical and electrical contractor established over 25 years ago, serving public, commercial, and private sectors with a 24/7 response. Their listed services include Heating & ventilation, Plumbing, Electrical, M&E contracting and Fit-out & interiors.
Where is J O'Connor based?
J O'Connor is registered at Unit 2 Horizon Trade Park, Ringway, London, N11 2NW, in London.
What areas does J O'Connor cover?
J O'Connor states that it works across UK-Wide, South East and Home Counties.
How many people work at J O'Connor?
Accounts filed for the year to 2025 report 11 employees, which places the company in the 10-49 employees band.
What is J O'Connor's turnover?
J O'Connor does not disclose turnover: UK small-company accounts are not required to. Based on creditors in its filed accounts, turnover is likely to fall between £1.8m and £7.3m. This is an estimate, not a filed figure.
Is J O'Connor still trading?
Companies House lists J O'Connor as active, with accounts most recently made up to 2025-03-31.
What accreditations does J O'Connor hold?
J O'Connor displays NIC EIC, Gas Safe, ISO 9001 and ISO4001 on its website.
What sectors does J O'Connor work in?
J O'Connor works in Public, Commercial, Residential and Healthcare.
When was J O'Connor established?
J O'Connor was incorporated on 1987-03-02, though the company says it has traded since 1996.