Performance-First Construction.
Garden offices, home gyms & entertaining spaces — built for year-round comfort.
Premium SIPS-built garden spaces and modern extensions with composite cladding, solar-ready roofs, and efficient heating options including infrared heating and air source heat pumps.
Modern architecture • Composite cladding • Solar PV ready
Built around how you’ll use the space.
Office, gym, studio or entertaining — we design the fabric first, then match the comfort options to your lifestyle.
Garden OfficeQuiet, focused and comfortable for daily work.
Home GymWarm comfort with efficient heating options.
Entertaining SpaceBar / lounge layouts designed for year-round use.
House ExtensionsModern rear/side extensions that blend seamlessly.
Heating & solar options.
Use-case led comfort: infrared heating or ASHP, with optional solar PV.
Infrared heating • Air source heat pump • Solar PV integration
Infrared heatingDiscreet, silent warmth that feels like sunshine — ideal for offices, gyms and entertaining.
Air source heat pumpPremium comfort with very low running costs and optional cooling for summer.
Solar PVRoof-ready design to reduce running costs and support low-carbon heating.
Guide pricing (typical 20–22m² garden space).
Final pricing depends on size, access, glazing and specification — these bands help set expectations.
Standard
Performance build
£22k–£26k + VAT
- SIPS structure + insulation
- Composite cladding finish
- Electrics, lighting & sockets
Most popular
Comfort package
+£1.2k–£2k
- Infrared heating panels
- Zoned controls
- Quiet, low maintenance
Premium
Future-ready
+£4.5k–£7k
- ASHP heating (optional cooling)
- Solar PV option (+£3.5k–£5k)
- Battery option (+£3.5k–£5k)
Guide pricing only. Subject to final design, access and specification.
Contact
Send your location, approximate size and intended use — we’ll recommend the right specification and return a guide price.
© ThermaBuild Living Ltd • Performance-First Construction.