Gloucester mixes Victorian terraces close to the docks and city centre with large post-war and modern estates on the edges, and the surrounding Severn Vale, Cotswold and Forest of Dean villages add a good number of older stone and solid-wall properties. That split matters for grants: the city itself is largely on mains gas and takes the standard £7,500 Boiler Upgrade Scheme grant, while rural Gloucestershire homes off the gas grid running on oil or LPG can qualify for the £9,000 rate. Installers covering the GL postcodes include a Gloucester-based firm alongside regional specialists working from Worcester and Wales.
£7.5k–£9k
Before you get quotes, check what grant you qualify for — most Gloucestershire homes get £7,500, off-grid oil/LPG homes now get £9,000. 60-second calculator →
1Priority One Plumbing
Coverage: Gloucester city-wide, plus Cheltenham, Tewkesbury and the wider Gloucestershire county, from a base in Churchdown
Visit website →Based in Churchdown just outside Gloucester and states that it is "MCS certified, Gas Safe registered, OFTEC and City & Guilds qualified, RECC members" and a Vaillant and Worcester Bosch accredited installer. States that it designs and installs air source heat pump systems across the county, and that the Boiler Upgrade Scheme grant is paid directly to it as the MCS certified installer and comes off the invoice rather than being claimed back.
Air source heat pumpsSystem designBUS grant handling
Certification claims are the installer's own — verify on the official MCS register. From the installer's public website, last checked 2026-08-30.
2Rollings Renewables
Coverage: Gloucester and surrounding areas, worked from a base near Worcester
Visit website →Describes itself as "an MCS-certified air source heat pump installer in Gloucester" and states that it is "MCS approved" and certified by its suppliers. States that it does not sub-contract its engineers and cites over 20 years of experience installing energy-efficient systems, covering property assessment through to installation and commissioning.
Air source heat pumpsProperty assessmentsInstallation and commissioning
Certification claims are the installer's own — verify on the official MCS register. From the installer's public website, last checked 2026-08-30.
3Thermal Earth
Coverage: Gloucester city, Cheltenham, Stroud, Cirencester, Tewkesbury, the Forest of Dean and villages across the Cotswolds and Severn Vale
Visit website →States that it is "MCS certified" and manages the full £7,500 Boiler Upgrade Scheme grant application. One of the few listed firms covering ground source as well as air source, stating that it handles system design, borehole drilling, servicing and maintenance across residential, commercial and social housing work, and citing over 20 years and 3,500-plus installations.
Air source heat pumpsGround source heat pumpsServicing and maintenanceBUS grant handling
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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