· 2 min read · By White Buffalo Bespoke
An integral or attached garage that no longer holds a car is one of the most under-used spaces in a North London or Hertfordshire home. Converting it can add a home office, gym, playroom or guest bedroom without the cost and disruption of building outwards.
Do you need planning permission?
Often not, when the work is internal and the outside of the building does not change much. But check these first:
- The original planning permission. Some newer estates have a condition requiring the garage or parking space to be kept. If so, you will need permission to change it.
- Changes to the front. Replacing an up-and-over door with a wall and window is usually straightforward, but the new look should be in keeping with the house.
- Conservation areas, listed buildings and Article 4 directions can add extra requirements.
- Use. Turning the space into a separate self-contained home is a different matter from extending your own living space.
If you are unsure, a Lawful Development Certificate from the council gives you written confirmation.
Building Regulations always apply
Even with no planning permission, a garage conversion is a change of use that must comply with Building Regulations. The main areas are:
- Insulation. Garage walls, roof and floor are rarely insulated to living-space standards. We fully insulate walls, roof and floor as standard, so the new room performs at least as well as the rest of your home.
- Damp proofing. Garage floors are often a bare slab. A damp proof membrane and a new floor build-up are essential.
- Ventilation and fire safety. The room needs adequate ventilation, smoke alarms and, where relevant, safe means of escape.
- Electrics and heating. New sockets, lighting and heating should be installed by qualified tradespeople and certified.
What can you use it for?
Popular uses include home offices, gyms, playrooms and guest bedrooms. Some homeowners keep a storage section at one end so they do not lose all the practical space, which we can design in. Think about how you will actually use the room before you finalise the layout: where the desk or bed goes, what natural light you need and whether you will want a bathroom or utility connection.
Typical timeline
Most garage conversions take two to four weeks on site, depending on the scope of work, including any plumbing or electrical additions. Add time beforehand for design, any planning check and Building Control notification.
Common mistakes
- Skipping the floor. Cold, damp floors are the number one complaint about poor conversions.
- Under-insulating because the space "feels fine" in summer.
- Forgetting about heating, so the room is not usable all year.
- Not thinking about the front elevation, so the house looks unfinished from the street.
Talk to us
We manage the whole conversion, from design to finishing, and advise you on planning before work begins. See our garage conversion service, read the answer to can I convert my garage without planning permission?, or arrange a free visit.
