Garage Conversion Design in Southampton
Turning your garage into a bedroom, home office, playroom or annexe is one of the most cost-effective ways to add living space to a Southampton home. Hampshire Build is a fixed-fee architectural design practice with over 20 years' experience. We handle the drawings, planning and building regulations side so you can get prices from builders with confidence.
Do you need planning permission in Southampton?
Many garage conversions are permitted development, especially internal-only conversions. However, some Southampton estates have planning conditions or Article 4 directions that remove those rights, and changes to the front elevation can need consent. We check your property and recommend the right route: a planning application, a Certificate of Lawful Development, or building regulations only. Building regulations approval is needed in every case.
Recent local project: Eastleigh garage conversion
A detached double garage in Eastleigh converted into a 28m² professional home office, with a separate WC, acoustic insulation and dedicated fibre broadband. The conversion fell under permitted development, and we obtained a Lawful Development Certificate and Building Regulations approval.
What's included (Pre-Build, £1,950 + VAT)
- Measured survey of your home
- Planning drawings and application (or a Certificate of Lawful Development)
- Building regulations drawings
- Structural calculations by an independent qualified structural engineer
Premium and Premium Plus packages add contract and tender support, a staged programme of works, the Building Notice and a Party Wall notice.
How quickly?
Your measured survey is booked within 10 working days of your deposit. Your first drawings follow within 15 working days of the survey.
Areas we cover
We design garage conversions across Southampton, including Shirley, Bitterne, Portswood, Bassett, Highfield, Woolston, Sholing and Swaythling, and nearby Eastleigh, Chandler's Ford, Hedge End, Totton and Romsey.