“Stephen replaced our old boiler and installed a smart thermostat in a single day. Clean, on time, fixed price. Couldn't fault the workmanship.”
Sarah M.
Darlington
Gas Safe No. 214402 · HETAS · MCS Renewables · North Yorkshire
Eco-Friendly Heating
Eco-Friendly Heating
Built for North Yorkshire Homes
Serving Richmond, Bedale, Thirsk, Northallerton & surrounding North Yorkshire areas
Gas-Safe boiler installations, MCS air source heat pumps and full bathroom fit-outs — delivered by a 30-year time-served North Yorkshire heating engineer.
5.0· verified customer reviews Gas Safe No. 214402
Free home survey · written quote in 48 hours · no salespeople
- Gas Safe Registered
- HETAS Registered
- 30+ Years Experience
- MCS Heat Pumps via Partner
- Fixed-Price Quotes
Get your free quote
Get your free quote
Gas Safe Registered
HETAS Registered
MCS Renewables
30 Years Experience
5-Star Local Reviews
Darlington Based
What we do
One trusted engineer for every system in your home.
Heating, renewables and bathrooms — designed, installed and signed off by the same person from the first call to the final commissioning.
Boiler Installation & Servicing
A-rated boilers, full system flush, 10-yr warranty registration.
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Renewables Installer
Heat pumps, solar thermal and low-carbon heating.
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Air Source Heat Pumps
MCS-grade installs with Boiler Upgrade Scheme guidance.
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Underfloor Heating
Wet and electric systems, retrofit or new-build ready.
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Gas Safety Inspections
Landlord & homeowner CP12 certificates, fast turnaround.
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Bathroom Installation
Full design-and-fit by one trusted team, plumbing included.
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Wet Room Installation
Tanked, tiled and finished — accessible and waterproof.
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Solid Fuel Installer
Multi-fuel stoves and back boilers, HETAS standards.
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Wood Burning Stove Installer
DEFRA Ecodesign stoves, chimney lining, HETAS-certified.
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Heating Engineer
Diagnostics, repairs, power-flushes and system upgrades.
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Why Greencore
A premium standard,
A premium standard,
delivered by one specialist.
Every Greencore install is owned end-to-end by Stephen — so what you see in the quote is exactly what gets fitted.
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30 years on the toolsTime-served plumber since 18, business owner since 22. Experience baked in, not bought in.
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One engineer, start to finishStephen surveys, quotes, fits and commissions every job personally.
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Renewables specialistsHeat pumps and low-carbon heating are core work — not a bolt-on to a gas business.
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Tidy, respectful, on timeDust sheets down, boots off, site cleaned. Customers' homes treated like our own.
Service Areas
Proudly serving Darlington
Proudly serving Darlington
& the wider North East.
Based in Darlington and covering homes from Teesside to County Durham and across North Yorkshire. If your postcode isn't listed, just ask.
How we work
From first call to final commissioning
From first call to final commissioning
— four straightforward steps.
01
Enquiry
Call or send a quick form. We respond same working day.
02
Site Visit
Free home survey at a time that suits you.
03
Fixed Quote
Written, itemised price within 48 hours — no surprises.
04
Clean Install
On time, dust-sheeted, commissioned and certified.
What customers say
Trusted by homeowners across the North East.
5.0 Google rating
“We had Greencore fit an air source heat pump. They organised the install via their MCS partner and the house has never been warmer. Genuine specialists.”
James R.
Stockton-on-Tees
“Full bathroom refit including all the plumbing. Honest quote, turned up when they said they would, finished to a really high standard.”
Helen P.
Middlesbrough
Common questions
Answers before you pick up the phone.
Still unsure? Call Stephen direct on 07789 505532.
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Yes — every gas installation, service or safety inspection we carry out is signed off under our Gas Safe registration. We can show ID on arrival.
Ready for a warmer, greener home?
Book a free home survey with Stephen — and have a fixed-price quote in your inbox within two working days.