Seven firms — six limited companies and one sole trader, across five parishes. The oldest dated firm is Guernsey Gas — the island's utility, incorporated 1988 with operational heritage to the 1820s; the newest, The Squirrel (2025), took that year's Norman Piette Customer Service Award. Four are Gas Safe registered. —
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St Peter Port·Service
Part of Islands Energy Group Limited
✦203-year heritage (1823)
Guernsey Gas Limited, trading as Guernsey Energy, is the island's gas utility supplying natural gas, bottled gas, and appliance services to homes and businesses.
St Martin·Service·Est. 1993
Part of Sarnia Energy Systems Limited
Gas Safe Registered heating and plumbing company established in 1993, specialising in central heating, air source heat pumps, and underfloor heating with four Gas Safe registered engineers.
St Martin·Service
Gas Safe and OFTEC-certified heating and plumbing company offering oil boiler servicing, central heating, and legionella control.
St Sampson·Service
Gas Safe registered plumbing and heating company, an approved installer for Daikin and Mitsubishi, specialising in marine, caravan, and mobile home systems across Guernsey and Alderney.
St Saviour·Service·Est. 2025
The Squirrel Plumbing and Heating Guernsey Ltd provides Gas Safe registered plumbing and heating services, including 24/7 emergency callouts.
Vale·Service
GBTEA member specialising in central heating, plumbing, and emergency plumbing and heating services across Guernsey for both commercial and residential clients.
St Peter Port·Service
Sole trader specialising in gas appliance installation and servicing for both residential and commercial clients across Guernsey.