30 years of heating engineering,delivered by one accountable team.
Greencore is a Darlington-based Gas-Safe and HETAS-registered, with MCS installs delivered via accredited partner installer. We replace boilers in a day, design heat pumps that actually deliver their MCS performance figures, and project-manage full bathroom and wet-room refits from start to finish.
Gas-Safe registered (No. 932261) · MCS · HETAS · Fully insured (£5m public liability)
Built on three decades of finishing the job properly
Greencore Solutions LTD was founded by Stephen Airey, a time-served heating engineer who has spent more than thirty years in customers' homes across Darlington, Teesside, County Durham and North Yorkshire. The business exists because too many homeowners had told the same story: a national installer quotes cheap, fits in a rush, and disappears the day the invoice clears.
We help homeowners and landlords who want their next install to be their last problem for a decade. That means we specialise in A-rated boiler installations, MCS-grade (via partner) air source heat pumps via our accredited MCS partner, full bathroom and wet-room refits, HETAS-registered stoves, underfloor heating and renewables — all delivered by the same in-house team that quoted the job.
We cover Darlington, Middlesbrough, Stockton-on-Tees, Durham City, Hartlepool, Sunderland, Richmond, Northallerton and the wider North Yorkshire and North East England area. We're small enough that the engineer who commissions your system is the engineer who quoted it, and big enough to handle full property refits and heat-pump conversions.
How we work — and what we guarantee
Our standards aren't a marketing page — they're the reason we still get phone calls from customers whose first boiler we fitted twenty years ago.
Fixed prices, no day-of-fit surprises
Every quote is itemised, written and valid for 30 days. Anything we spot at survey is priced upfront — the number on the invoice matches the number on the quote.
Manufacturer-grade install standard
Worcester, Vaillant, Ideal, Daikin and Mitsubishi accredited. We register your warranty on commissioning so the 10–12 year cover is live before we leave site.
One accountable engineer
The engineer who quoted your job is the engineer who commissions it.
12-month workmanship guarantee
On top of the manufacturer's warranty. If our workmanship fails inside 12 months we come back and fix it — no quibble.
Clean, considerate working practice
Dust sheets down, shoes off, tools tidied at the end of every day. We work in people's homes and we treat them accordingly.
Honest fit, even when it costs us the job
If your property fabric won't support a heat pump, we'll say so. If a repair is the right call instead of a replacement, we'll quote that. We'd rather lose the quote than mis-sell the install.
The numbers behind the work
Ready for a fixed-price quote on your project?
Survey booked inside the week. Fixed written quote inside 48 hours. No call-centres, no sales pressure.