Darlington & North YorkshireOpen 8am–8pm, 7 days info@greencoresolutions.co.uk07414 209357 Services Service Areas AboutOur WorkReviewsContact07414 209357Request Estimate Customer Reviews # 5.0/5 across 12+ verified jobs.Real customers. Real outcomes. Boilers, heat pumps, bathrooms, wet rooms and scheduled repairs across Darlington, Teesside, County Durham, Wearside and North Yorkshire. Request Your Quote 07414 209357 5.0/5 Average customer rating 12+ Verified reviews on this page 100% 5-star recommendation rate 30+ yrs On-the-tools experience "Stephen replaced our old boiler and installed a smart thermostat in a single day. Clean, on time, fixed price. The new system is noticeably quieter and our gas usage has dropped. Couldn't fault the workmanship." Sarah M. Boiler Installation · Darlington "We had Greencore fit an air source heat pump. They organised the heat pump install via their MCS partner and the house has never been warmer. Genuine specialists — and the running costs are exactly what they said they'd be." James R. Air Source Heat Pump · Stockton-on-Tees "Full bathroom refit including all the plumbing, tiling and electrics. Honest quote, turned up when they said they would, finished to a really high standard. They project-managed the lot — no chasing trades." Helen P. Bathroom Installation · Middlesbrough "Annual service and CP12 across three rental properties. Diarised reminders, single invoice, certificates emailed the same day. Best landlord experience we've had in ten years." David T. Boiler Servicing & CP12 · Durham City "We were on oil and the bills were brutal. Stephen modelled the heat pump option honestly, the conversion was completed in five days. First winter running costs are around 40% of what we were paying." Margaret L. Heat Pump (Off-grid) · Richmond "Wet underfloor heating across our kitchen extension, plus a re-balance of the upstairs radiators. Hydraulically separated properly — no fighting circuits like the previous installer left us with. Faultless." Paul & Anna B. Underfloor Heating · Yarm "Coastal Headland property — Stephen used a stainless flue terminal as standard, not as an upsell. Two winters in and it still looks like the day it was fitted. The previous installer's mild-steel terminal had rotted through in three years." Tony H. Boiler Installation (Coastal) · Hartlepool "Converted our family bathroom into a wet room for my elderly mother. Properly tanked, perfect falls, level access. Three weeks on site, finished exactly to the agreed brief, no surprises." Rachel D. Bathroom & Wet Room · Sunderland "Multi-fuel stove with twin-wall flue. HETAS certificate and Building Control notification handled. Detailed CO test and a proper handover so we knew how to run it. Excellent work." Mike S. HETAS Stove Install · Northallerton "No heat on a Saturday morning in January with a toddler in the house. Stephen was on site inside two hours, diagnosed a failed PCB, sourced the part and had us back up and running by mid-afternoon. Genuinely above and beyond." Lisa K. Boiler Repair · Darlington "Replaced an undersized combi with a system boiler and a 250L unvented cylinder. Three en-suites finally run simultaneously without complaint. Took the time to do the calc properly upfront." Robert F. System Boiler & Cylinder · Wynyard "Magnetic power-flush, new filter and full service. Radiators that had been cold at the bottom for years are now properly hot all over. Boiler is quieter too. Brilliant value for what it cost." Janet W. Power-flush & Service · Newton Hall, Durham ## Join the customers who'd recommend us One survey, one written number, one accountable engineer from start to finish. Leave Us a Google ReviewRequest Fixed-Price Quote 07414 209357 Gas-Safe registered · MCS · HETAS · 12-month workmanship guarantee Gas-Safe heating, renewables and bathroom specialists for homes across Darlington & North Yorkshire. 30 years on the tools. 07414 209357 07789 505532 info@greencoresolutionsltd.co.uk11 Chelsea Court, Marlborough Drive,Darlington, DL1 5YE Services - Boiler Installation & Servicing - Air Source Heat Pumps - Gas Safety Inspections - Underfloor Heating - Bathroom Installation - Renewables Installer Service Areas - Heating engineer Darlington - Boiler installer Middlesbrough - Heating engineer Stockton-on-Tees - Gas Safe engineer Durham City - Heating engineer Hartlepool - All North Yorkshire service areas Company - All services - Our work gallery - Customer reviews - About Greencore - Contact us - Privacy policy - Cookie policy - Terms & conditions Looking for a trusted Gas-Safe boiler installer in Darlington, an MCS air source heat pump installer in North Yorkshire or a complete bathroom fitter in Teesside? Greencore Solutions LTD covers the whole region from a single accountable engineer. © 2026 Greencore Solutions LTD. All rights reserved.Gas Safe Registered·HETAS Registered·MCS Renewables Call now Request Estimate