1 Planning permission-You usually only need to apply for planning permission to convert a garage when you intend to extend the actual size of the garage. 2  However, check with your local authority as the precise rules do differ. Double garage-You may either convert the whole area, or just the nearest side to your house. 2  If you convert it all, you can expect to add around 300 square feet of floor space to your home. 3  Tandem garage-As before, converting only the back will leave you with the best of both worlds.
Below is an outline of the main components of a shed or garage and what you can expect to pay: Sheds and Garages Kit Cost $3,500 â $28,000. These range from a single car garage to a large fully lock-up workshop. Sheds and Garages Permit Cost Approximately $900. Plus warranty insurance of $750 if the job is worth over $12,000. (Central Steel Build is a registered builder). Sheds and Garages Footing Costs $400 â $1900.
New Structure (other than a building, i.e., canopy, retaining wall, sign). *The fees calculated here are estimates only and may not be the final fees charged. The base permit fee is $108. All final permit fees, based on the Fairfax County Fee Schedule, will be calculated by county staff.Separate permits are required for mechanical, electrical and plumbing work.ew Structure (other than a building, i.e., canopy, retaining wall, sign). *The fees calculated here are estimates only and may not be the final fees charged. The base permit fee is $108. All final permit fees, based on the Fairfax County Fee Schedule, will be calculated by county staff.