Air Conditioning, HVAC & Heat Pumps
Design, installation, servicing and maintenance of cooling, heating and ventilation systems for properties of every size.
One Group. Complete Solutions.
Delivering excellence,
across every environment.
Grays Services Group brings together four specialist companies — residential, maintenance, mechanical and London projects — under one trusted name. 25+ years of expertise, one group you can rely on for any property, of any size.
Four companies.
One group.
25+
Years of expertise
4
Specialist companies
1,000+
Projects completed
Nationwide
Residential to large-scale commercial
What we do
One group, every service you need
From individual systems and planned maintenance to complex mechanical projects, our four companies cover the full range — and if you don't see it listed, we've very likely got it covered too.
Boilers, Chillers & Heating Systems
Boiler, chiller and hot-water solutions, from routine servicing and repairs to complete plant installations.
Plumbing, Water Treatment & Pumps
Plumbing, filtration, strainers, booster pumps, waste pumps and water-storage systems for residential and commercial sites.
Electrical, UPS & Building Controls
Electrical installations, power-protection systems and BMS controls for reliable and efficient building operation.
Fire Alarm & Protection Systems
Installation and maintenance of fire alarms, sprinklers, extinguishers and dry risers across individual and multi-site properties.
Consultancy, Design & Major Projects
Technical consultancy, system design and coordinated mechanical, and HVAC delivery for complex commercial projects.
Support for every kind of property
Whatever you look after, whatever you own, we have the right team.
From individual homes and property portfolios to commercial sites and major projects, choose the option that best describes what you manage or own and we'll guide you to the right part of the group.
The group
Four companies. One group.
Each company specialises in its own area, and each draws on the resources, standards and expertise of the wider group.
Home services — air conditioning, heat pumps, boilers, electrical, plumbing and general property services for homeowners across Buckinghamshire, Berkshire and beyond.
Visit GMS Residential ↗Ongoing maintenance for residential and commercial customers of every type — keeping properties running smoothly, year round.
Visit GMS Maintenance ↗Large-scale project installations — from hotel HVAC systems to major commercial mechanical fit-outs.
Visit GMS Mechanical ↗Project installations focused in London — bringing the group's full capability to the capital.
Visit GMS London ↗Est. 25+ years ago
A group built on trust, scale and collaboration.
What started as a single company has grown into a group of four, each specialising in its own discipline while sharing one standard of quality. It's why homeowners, portfolio owners and major commercial clients alike trust Grays Services Group with projects of any size.
More about the group →
One standard
Quality, safety and compliance in everything we do.
Stronger together
Shared resources, smarter solutions, better outcomes.
Built for scale
From a single home to complex multi-site developments.