Attached and integral garages
A garage that's built into the house, or that shares a wall with it, usually has electrics, heating and drainage running nearby already, which tends to make the conversion simpler than a detached one. Expect the core work to involve raising or relaying the floor, insulating the walls and roof, and dealing with the garage door, either replacing it or building over it.
Detached garages
A separate garage in the garden, more common on some of the larger, older plots around Godalming's outlying villages, can still be converted into a home office, studio or guest room, but power, and sometimes water and drainage, need to be run out to it, which adds to both the groundwork and the planning involved.
Building regulations and planning
Building regulations sign-off is required for virtually every garage conversion, since it covers structure, insulation, damp-proofing, ventilation, electrics and fire safety. Planning permission is usually not required where the external appearance stays the same, though the Planning Portal's guidance on garage conversion planning permission sets out where this can differ, including on listed buildings and in conservation areas.
What a local installer will look at
An installer will typically want to know about the current floor level and any damp signs, how much insulation (if any) is already in the walls and roof, whether the garage stands attached or detached, and what the finished room will be used for, since that shapes decisions on sockets, heating and lighting.
Frequently asked questions
Can any garage be converted?+
The majority can, though how straightforward it is comes down to headroom, floor level, any damp issues, and whether it's attached or standing alone. Most local installers can size up fairly quickly whether a particular garage is a simple job or one that needs extra work.
Does the garage door have to come out?+
Plenty of homeowners swap it for a wall and window that match the rest of the house, but it's not compulsory, some keep the garage-style door where part of the space is still used for storage behind a partition wall.
Will the floor need raising?+
In many cases, yes. Garage floors tend to sit lower than the rest of the house and can be missing a damp-proof membrane, so raising or relaying it is a fairly routine part of the work.
What if the garage backs onto a neighbour's property?+
A garage that's attached to a semi-detached or terraced neighbour can bring the Party Wall etc. Act 1996 into play, so it's worth flagging the neighbour-notification process with your installer early in the project.
Useful local links
- Waverley Borough Council – Do I need planning permission? — The planning authority covering Godalming and most of the surrounding villages.
- Guildford Borough Council – Do I need planning permission? — The planning authority covering Guildford and the villages to its west and south, a different borough from Waverley.
- GOV.UK – Planning permission: when you need it — Government guidance on when planning permission is required in England and Wales.
- GOV.UK – Party Wall etc. Act 1996 guidance — Government guidance on notifying neighbours and resolving disputes over shared or boundary walls, relevant to attached garage conversions.
- Planning Portal – Garage conversion — National guidance on when planning permission is needed for a garage conversion in England.
- Planning Portal – Outbuildings — National guidance on permitted development rules for garden buildings and outbuildings, including height and coverage limits.