About GMC Solar
A division of GMC Developments Ltd. Family-run, Berwick-based, and trusted across Northumberland and the Scottish Borders since 1976.
Our Story
GM Craig Building Contractors was founded by George M. Craig in 1976. For nearly fifty years, the company has been one of the most trusted names in construction across the Borders region.
In 2010, under the direction of Neil Craig, we added solar panel installation to our services. It was a natural fit: our team already had the roofing expertise, electrical qualifications, and scaffolding capability that solar work demands.
Since then, we have completed over 200 solar installations. From 4-panel domestic systems on terraced houses to 150kW arrays on agricultural barns, every project is handled by our own in-house team. We do not subcontract. We do not use sales agents. When you call GMC Solar, you speak to the people who will be on your roof.
GMC Developments Ltd is the parent company, with divisions covering Solar, Construction, Property Services, and Developments. Our registered office is at 1 Longstone Court, Ramparts Business Park, Berwick-upon-Tweed, TD15 1FA.
Key Milestones
George M. Craig founds GM Craig Building Contractors in Berwick-upon-Tweed.
Solar division launched. First residential solar panel installation completed.
Barn at Beal installed, one of our earliest commercial projects on Holy Island route.
MCS and NAPIT accreditations achieved. 50th solar installation completed.
100th solar installation. First commercial system over 50kW installed.
RECC membership secured. Battery storage added to service offering.
200th solar installation milestone. Treelocate 150kW system completed.
Dedicated solar division website launched to serve the Borders region.
Our Accreditations
MCS Certified
The Microgeneration Certification Scheme is the recognised quality standard for small-scale renewable energy installations. Required for Smart Export Guarantee eligibility.
NAPIT Approved
National Association of Professional Inspectors and Testers. Confirms our electrical work meets Building Regulations Part P and BS 7671.
RECC Member
The Renewable Energy Consumer Code protects homeowners buying renewable energy systems. Membership means we follow a strict code of practice.
Our Coverage Area
Based in Berwick-upon-Tweed, we cover Northumberland and the Scottish Borders, extending into East Lothian and North Durham.
Talk to a Real Person
No call centres. No sales scripts. Just honest advice from the people who do the work.