Garden Room Advice & Installation Support

Thinking about a garden office, studio, gym, hobby room or flexible guest space? EvoHome Improvements helps homeowners across Hampshire and the South compare suitable garden room options and coordinate quotations from vetted independent specialists. We talk through intended use, size and layout, garden access and ground conditions, foundation/base options, timber, SIP or modular construction, insulation and year-round comfort, glazing, electrics, lighting, internet, heating and — where needed — drainage or plumbing.

Planning and permitted development depend on your property, plot and specification, and final suitability, price and timescales are confirmed by the appointed specialist after a site visit. EvoHome Improvements does not physically build garden rooms; vetted independent specialists carry out the installation work, and we do not promise guaranteed planning outcomes, fixed prices, exact build times or year-round performance without a properly specified design.

Garden rooms have become one of the UK's fastest-growing home improvement categories, driven by the shift to hybrid working and the desire for dedicated spaces separate from the main house. A well-built garden room adds genuine usable space and typically increases property value by £15,000–£30,000.\n\n## Planning Permission\n\nMost garden rooms fall under Permitted Development rights, meaning no planning permission is needed if they meet specific criteria: single storey, maximum 2.

5m height at the boundary (or 4m with a dual-pitched roof centrally), no more than 50% garden coverage, and no sleeping accommodation. Conservation areas and listed buildings have additional restrictions.\n\n## Insulation Standards\n\nA garden room intended for year-round use needs insulation comparable to a house extension.

Target U-values of 0.15–0.20 W/m²K for walls, floor and roof ensure comfort without excessive heating costs. SIP (Structural Insulated Panel) construction achieves excellent thermal performance in a slim wall build-up.\n\n## Electrical and Connectivity\n\nProfessional electrical installation is essential — a dedicated armoured cable from the main consumer unit provides reliable power.

For home offices, hardwired ethernet or mesh WiFi should be planned from the outset. Heating options include electric radiators, underfloor heating, or mini-split air conditioning for heating and cooling.\n\n## Hampshire Considerations\n\nGround conditions in Hampshire vary significantly — from chalk downland to clay lowlands.

Foundation choice should reflect local soil conditions. Coastal areas benefit from weather-resistant cladding and enhanced glazing specifications. ## Start With the Intended Use A home office, a gym, a treatment room, a hobby workshop and a garden bar make very different demands on insulation, power, heating, acoustics, flooring and glazing.

The specification should follow the use, and the use should be settled before anyone quotes. ## Construction Systems - Timber frame with…