Looking for Green Building Renewables

You're in the right place, we rebranded to 21 Degrees in November 2024

External image of a house with 21 Degrees windows, the lights on at dusk

Green Building Renewables is now 21 Degrees

We officially merged with 21 Degrees in November 2024 and all services, products and operations have been under the same 21 Degrees name since then, offering a more streamlined and powerful approach to creating sustainable, comfortable spaces across the UK.

Products & Services

Solar panels

Harness the sun with our high-efficiency solar panels and save on energy costs and reduce your carbon footprint.

Heat pumps

Heat pumps are the future of home heating. We install air and ground source heat pumps and help you find the best solution.

MVHR

Providing fresh filtered air into a building whilst retaining most of the energy that has already been used in heating the building.

Design services

We provide design services to support self-builders and architects in creating low-energy homes.

Windows

Explore our high-performance triple-glazed windows, ideal for low-energy and Passivhaus homes.

Doors

Thrive in spaces of comfort. Discover our range of high-performance doors, ideal for low-energy and Passivhaus homes.

Airtightness

Airtightness is essential for low-energy buildings, forming a continuous seal that reduces carbon emissions

Compacfoam

Compacfoam is a strong, lightweight, and rigid insulation material made from thermoplastic polystyrene foam.

Tailored energy efficiency for homes

Every home is unique. Whether you're building a modern, energy efficient home from scratch or retrofitting a historic property, we offer bespoke solutions that respect the character of your home while significantly enhancing its energy performance.

We'll work closely with you to ensure every detail of your project is optimised for sustainability, health, comfort, and long term value

Hear about our design services

Our architect specified the windows and doors, with 21 Degrees designing and specifying the MVHR systems, and everything was installed by our builder, CRD Bath Ltd. Working with 21 Degrees was great as we were able to tweak the window order right up to the order point, including swapping the stock handles for something that better fitted the design ideas.

Homeowner & client