Garage Conversion Advice & Project Support

Garage conversions are often the most cost-effective way to add a useable room without extending. EvoHome Improvements helps homeowners across Hampshire and the South think through whether the existing garage is realistically suitable — floor level, damp, foundations, wall and roof construction, ceiling height, insulation, ventilation, drainage and how the new room connects to the rest of the home.

Planning is usually permitted development, but not always; building control applies. Loss of off-street parking and impact on house value also need thinking through. EvoHome Improvements advises and coordinates — independent vetted building specialists carry out the physical work. We do not quote fixed prices, exact timescales or guaranteed planning/building control outcomes without a proper survey.

Garage conversions consistently rank as one of the most cost-effective ways to add living space to a UK home. With average costs of £750–£1,200 per square metre — compared to £1,500–£2,500 for a new-build extension — they offer excellent value while typically adding 10–20% to property value.\n\n## Building Regulations\n\nAll garage conversions require Building Regulations approval, covering structural integrity, fire safety, insulation, ventilation, and drainage.

The garage floor must be insulated and levelled, walls brought up to current thermal standards, and adequate fire escape routes maintained.\n\n## Structural Considerations\n\nMost single garages have adequate foundations for conversion, but this must be verified. Internal walls between house and garage often need fire-rating upgrades.

The garage door opening is typically replaced with a window and insulated wall panel, or bi-fold doors for maximum light.\n\n## Insulation Requirements\n\nGarages are effectively uninsulated shells. Conversion requires insulation to walls (typically 90–100mm insulated plasterboard), floor (75–100mm rigid insulation beneath a screed), and ceiling (200–270mm between joists).

This brings the space to current Building Regulations Part L standards.\n\n## Hampshire Market Impact\n\nIn Hampshire's competitive property market, a well-executed garage conversion adds genuine value. Home offices, additional bedrooms, and self-contained annexes are particularly sought-after. However, loss of off-street parking can affect value in areas where parking is limited.