Chelmsford became a city in 2012 and sits on the commuter line into Liverpool Street, which shows in its housing: substantial interwar and post-war suburbs at Springfield and Great Baddow, plus a lot of recent flats and family housing around Beaulieu Park and the city centre. That newer, well-insulated stock tends to make for straightforward heat pump retrofits. Chelmsford itself is on mains gas, so the standard £7,500 Boiler Upgrade Scheme grant applies to most homes — the £9,000 off-gas-grid rate is more relevant out in the rural Essex villages towards Maldon and the Dengie peninsula. Installers covering the CM postcodes are typically Essex and East Anglian firms that also work across London and Hertfordshire.
£7.5k–£9k
Before you get quotes, check what grant you qualify for — most Essex homes get £7,500, off-grid oil/LPG homes now get £9,000. 60-second calculator →
1Bliss Eco Energy
Coverage: Chelmsford, Southend and across Essex, with offices listed at Southend-on-Sea, Basildon and Medway
Visit website →States that it provides "Fully Accredited Installers: MCS, NAPIT, TrustMark, and HIES certified" and describes "5-star rated installations across Essex, Southend, Chelmsford, and surrounding areas". Covers air source heat pump system design, installation, grant management and maintenance packages.
Air source heat pumpsSystem designBUS grant managementMaintenance packages
Certification claims are the installer's own — verify on the official MCS register. From the installer's public website, last checked 2026-08-30.
2Terra Therma
Coverage: Essex, London, East Anglia and the South East, from a base at Little Totham near Maldon
Visit website →Describes itself as "MCS-accredited, fully certified, providing expert heat pump installation services" and states "We only work with MCS-certified equipment and providers". Lists air source heat pump installation alongside underfloor heating, MVHR, thermal insulation and screed work.
Air source heat pumpsUnderfloor heatingMVHRSystem design
Certification claims are the installer's own — verify on the official MCS register. From the installer's public website, last checked 2026-08-30.
3Reina Group
Coverage: Essex including Chelmsford, as part of a wider South East service area
Visit website →States that it is "Microgeneration Certification Scheme approved" and that its work is carried out by "MCS certified experienced engineers", and names Chelmsford among the Essex locations it serves. Lists design and installation of air source and ground source heat pumps, system integration and annual servicing.
Air source heat pumpsGround source heat pumpsSystem designAnnual servicing
Certification claims are the installer's own — verify on the official MCS register. From the installer's public website, last checked 2026-08-30.
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