MEP Contractors in London. One Team for Mechanical, Electrical and Plumbing

MEP Contractors in London. One Team for Mechanical, Electrical and Plumbing

J SONS & CO. delivers integrated MEP services across all 32 London boroughs and the City of London, covering mechanical installations, electrical works to BS 7671, and commercial plumbing under one directly employed team. Whether you need an M&E fit out for a new office, an EICR for a landlord portfolio, or planned MEP maintenance for a multi site estate, our London engineers handle design, installation, testing and certification without subcontractor handoffs.

We have supported property managers, landlords, contractors and business owners across Wembley, Harrow, Watford, Kensington, Mayfair, Richmond, Wimbledon and the wider UK, backed by CHAS accreditation and a minimum of £5 million Public and Employer’s Liability insurance.

What Are MEP Services?

MEP stands for Mechanical, Electrical and Plumbing, the three building services disciplines that keep any commercial or residential property functional, safe and compliant. Often called M&E services or building services engineering in the UK, MEP covers everything from heating and ventilation plant to power distribution, lighting, drainage and water systems. Most London buildings rely on separate mechanical, electrical and plumbing contractors, which creates coordination gaps, duplicated callout costs and split responsibility when something fails. As an integrated MEP contractor, J SONS & CO. closes that gap with one contract, one account manager and one team accountable for every building system.

Our Mechanical Services in London

Our mechanical engineering scope covers the plant and systems that move air, heat and refrigerant through your building. This includes HVAC installation and maintenance for split, multi split and VRF systems, commercial heating and ventilation including AHU servicing and ductwork. We provide boiler installation, servicing and repair, with annual Gas Safe boiler servicing and landlord gas safety certification carried out by Gas Safe registered engineers.

We also install and maintain commercial refrigeration and cold rooms, keeping full F Gas compliance records for all refrigerant based systems. Our ventilation work covers kitchen extract, toilet extract, MVHR and healthcare ventilation aligned to HTM 03 01 standards. Plant room works include LPHW pipework, pumps, pressurisation units and PSSR inspections for pressurised systems. Every mechanical installation is commissioned, documented and handed over with the certificates your insurer, landlord or building control requires.

Our Electrical Services in London

All electrical work is carried out to BS 7671, the 18th Edition Wiring Regulations, by qualified electricians. Our electrical scope covers Fixed Wire Testing and Electrical Installation Condition Reports for commercial premises and rental properties, including remedial works and rectification of C1 and C2 faults. We run scheduled Portable Appliance Testing programmes for offices, schools, retail units and healthcare sites.

For new installations and rewires, we handle distribution boards, sub mains, three phase supplies, small power and containment. We also deliver commercial and emergency lighting, including LED upgrades, lighting design and emergency lighting testing to BS 5266, plus fire alarm installation and maintenance coordination aligned to BS 5839. Our team can assess supply capacity and install EV chargers for commercial car parks and residential blocks.

Our Plumbing Services in London

Our commercial plumbing engineers cover the full water and drainage scope. This includes commercial plumbing installation and repair for sanitaryware, hot and cold water services, booster sets and unvented cylinders. We manage L8 Legionella compliance with risk assessments, temperature monitoring, tank cleaning and ongoing water hygiene management under ACoP L8.

We handle drainage and waste systems, covering blocked drains, gutter clearance, soil stack repairs and drainage surveys. For emergencies, we provide leak detection and rapid response plumbing callouts for burst pipes and water damage containment. We also deliver washroom and kitchen fit out plumbing as first and second fix within refurbishment projects.

Three Ways to Work With Us

MEP Fit Out and Installation Projects. Design and build MEP packages for office fit outs, restaurant and retail units, dental and medical clinics, and residential refurbishments, delivered alongside our in house fit out team so services and finishes are coordinated by one contractor.

Planned MEP Maintenance under PPM Contracts. Twelve month planned preventative maintenance contracts covering mechanical plant, electrical testing schedules and water hygiene. Each contract includes a scheduled visit programme, written engineer reports, photographic records and a year end compliance certificate pack.

Reactive MEP Repairs and Emergency Callouts. 24/7 emergency response for electrical faults, plumbing failures, heating breakdowns and refrigeration failures. PPM clients receive priority same day response targets for critical systems in London, with SLA response times agreed at contract start.

Compliance and Statutory Testing We Manage

MEP compliance is where most London buildings fall short. Our contracts consolidate every statutory requirement into one framework, including Fixed Wire Testing to BS 7671, gas boiler servicing and certification through the Gas Safe Register, refrigerant leak checks under F Gas Regulations, Legionella risk assessment and monitoring under ACoP L8 and HSG274, pressure systems inspection under PSSR 2000, lifting equipment inspection under LOLER 1998, Portable Appliance Testing to the IET Code of Practice, and emergency lighting and fire alarm testing to BS 5266 and BS 5839.

You receive a complete annual compliance pack with certificates, inspection records and maintenance logs, ready for insurers, landlords, CQC inspections and regulators.

Sectors We Serve

We work with commercial offices from single floors to multi storey buildings and coworking spaces, retail, restaurants and hospitality with out of hours MEP works to protect trading hours, healthcare and dental practices with CQC aligned electrical, ventilation and water hygiene delivery, education sites with COSHH compliant works scheduled around term breaks, industrial and logistics facilities requiring three phase distribution, industrial ventilation and refrigeration plant, and residential blocks and landlord portfolios needing EICRs, gas certificates and communal plant maintenance under one agreement.

Why Choose J SONS & CO. for MEP Services in London?

Directly employed MEP engineers. Our mechanical, electrical and plumbing engineers are in house, not subcontracted, so response times, workmanship and accountability sit with one company.

One contractor for MEP, FM and fit out. Faults found during maintenance visits can be repaired by the same team that installed the systems, cutting procurement delays and duplicate callout charges.

Compliance first delivery. CHAS accredited, Gas Safe registered engineers, F Gas compliant, and all electrical work certified to BS 7671, with documentation issued after every visit rather than chased at year end.

Genuine London coverage. Engineers based across Wembley, Harrow and Greater London serving all 32 boroughs, with UK wide coverage available under a single contract for multi site portfolios.

Insured and accountable. Minimum £5 million Public and Employer’s Liability cover on every project, plus written reports and photographic records as standard.

Frequently Asked Questions

What do MEP services include for a commercial building in London?

MEP services cover the mechanical systems such as HVAC, boilers, ventilation and refrigeration, the electrical systems such as power distribution, lighting, fixed wire testing and PAT, and the plumbing systems such as water services, drainage and Legionella control. A full service MEP contractor like J SONS & CO. handles installation, planned maintenance, reactive repairs and statutory compliance testing under one contract.

What is the difference between MEP and M&E services?

They largely describe the same discipline. M&E, meaning mechanical and electrical, is the traditional UK term, while MEP explicitly includes plumbing as a third discipline. In practice, most London M&E contractors also cover plumbing. We use MEP because our scope formally includes water services, drainage and L8 water hygiene alongside mechanical and electrical works.

How much do MEP maintenance contracts cost in London?

Pricing depends on building size, asset count, visit frequency and compliance scope. A small office may need a light annual schedule, while a healthcare site requires monthly water hygiene checks and stricter electrical testing. We carry out a free building survey and asset register review, then provide a fixed annual PPM price with agreed SLA response times so you can budget without surprise callout costs.

Do you provide EICR certificates and Gas Safe certificates as part of an MEP contract?

Yes. Fixed Wire Electrical Testing to BS 7671 and annual boiler servicing with certification by Gas Safe registered engineers are both delivered in house and included in your annual compliance pack, alongside F Gas records, L8 Legionella assessments, PAT results and emergency lighting test logs.

Can you take over MEP maintenance from our current contractor?

Yes. We begin with a building condition survey and asset register review to establish the state of all mechanical, electrical and plumbing systems and identify any deferred maintenance. Most handovers complete within 30 days, with no gap in statutory compliance coverage during the transition.

Get an MEP Quote for Your London Property

Tell us about your building, whether it is a fit out project, a compliance backlog or a maintenance contract due for renewal, and our London team will survey the site and provide a clear, fixed proposal.

J SONS & CO. Wembley, London, HA9. CHAS Accredited. £5M Insured. Serving all 32 London boroughs and the UK.

London FM Enquiries
 Phone: +44 20 8050 7969
Email: info@jsonsco.com 

Contact London Team | London Services