Bolton's 1960s to 1980s houses
Ask what decade your house was built in before you ask what the garage could become. In the council's 2015 household survey, homes built between 1965 and 1984 were the biggest single age group in the borough, at almost a quarter of the stock. Another sixth went up between 1985 and 2004. Those are the years of the semi with a garage alongside and the detached house with one built in.
They aren't spread evenly. The same survey found detached houses and semis made up over 60% of homes in Westhoughton with Chew Moor, and in Heaton, Lostock and Smithills. Astley Bridge, Bromley Cross and Harwood were close behind. Over Hulton stood out for bungalows, a quarter of its homes. Daubhill or Halliwell is a different picture, mostly terraces with a back yard and no garage at all, which is why the loft is the usual answer there.
So most garage conversions here happen on the suburban edges, in houses now forty or fifty years old.
4.8 metres between the footway and your wall
Lose the garage and the car needs to stand somewhere else. If that means a new drive across the front garden, Bolton's highways team won't even consider a dropped kerb unless there is at least 4.8 metres between the back of the footway and the building. Measure it before you commit. If it falls short, the car goes on the street.
The council expects the drive to be finished before it builds the crossing, and it won't put one in a lay-by. If the house fronts an A, B or C road, or the job involves paving over what used to be garden, the crossing may need planning permission as well. Separately, since October 2008 a hard surface over 5 square metres of front garden that sheds water onto the road needs permission, while permeable paving doesn't. Given the surface water problems the council's flood assessment records in places such as Kearsley, we'd choose permeable anyway.
Planners notice the parking too. Bolton's transport guidance says garage conversions may affect parking provision, and its house extensions guide wants a space normally at least 6 metres long in front of any garage that stays.
Which conversion suits which house
Integral. Where the garage sits under the main roof, the walls and roof are already part of the house. The catch is that the Planning Portal warns that rights for garage conversions are sometimes removed on newer developments, so look at the conditions before anyone draws a plan.
Single. The garage beside a 1970s semi in Westhoughton or Astley Bridge. The work is mostly in the floor and the front wall, and LABC's building control people say the old footing under the door opening has to be dug out and checked before the new wall goes on it.
Read our full guide: Single Garage Conversion: What Is Involved and What to Budget For →
Bedroom. Suits a bungalow in Over Hulton. If the room is reached only through another room, LABC says an escape window is needed. Anywhere near the Croal or the Irwell, check the flood map first, because a bed at garage floor level is the worst place to be when a river comes up.
Office. On a three-bed semi where the box room is already a bedroom, the garage is often the only spare space left. Insulate it like a habitable room, since you'll sit there all day, and put the data cable in the quote.
Utility or playroom. On a semi with a small kitchen, putting the washer and dryer in the front half of the garage frees up the kitchen. A playroom is living space, so treat it as a habitable room. Ask building control whether a utility on its own is caught.
Double. Mostly a detached house job, so think Westhoughton, Lostock or Harwood rather than the inner wards. Converting one bay avoids most of the parking argument.
Gym or studio. Where two semis have garages built against each other, sound carries through the shared wall. Line it properly or your neighbour will hear every dropped weight.
Detached. A detached garage used as your own gym or office is still part of the home. Make it a separate house, whoever lives there, and the Planning Portal says permission may be needed whatever the works.
Planning and approval. Internal work usually needs no application. The new window in the old door opening is an outside change, which matters in a conservation area or where a condition removed your rights. Building regulations approval is a separate matter and normally needed.
Cost. We don't publish prices for Bolton. The things that move a quote here are a new drive and crossing, an old flat roof that needs replacing, and how much of the floor has to come up.
Floors, footings and the people who sign it off
Garage floors usually sit a step below the house. Building control will want a damp membrane lapped into the existing damp course, and the whole shell insulated to habitable room standard. Much of the disruption is in that floor.
The council runs its own building control team at the Town Hall. Full plans, building notice and regularisation for work done without approval are all offered. Full plans gets the drawings checked before anything is built, which we'd want when the front wall needs a new foundation.
Any application in one of Bolton's 26 conservation areas needs a heritage statement, and Barrow Bridge also has an Article 4 direction. Ask before changing a street-facing garage door in either case.
Conversions in radon-affected areas can need radon protection under the building regulations. Check your address on the UKradon map, or ask the inspector.
Where these facts come from
- Bolton Housing Needs Assessment 2016
- Bolton Housing Needs Assessment 2015: sub-area summaries
- Bolton Council: dropped kerbs, things to consider
- Bolton Council: dropped kerbs, planning permission
- Bolton Council: Accessibility, Transport and Road Safety SPD
- Bolton Council: House Extensions SPD (2012)
- Bolton Council: Strategic Flood Risk Assessment
- Bolton Council: Article 4 direction in conservation areas
- Bolton Council: HMO Article 4 direction FAQs
- Bolton Council: building control applications
- GOV.UK: permeable surfacing of front gardens
- Planning Portal: garage conversion planning permission
- Planning Portal: building regulations for a garage conversion
- LABC: garage conversion tips from building control
- LABC: do I need to consider radon?
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Questions people in Bolton ask
We're on a 1980s estate in Westhoughton. Why does it matter what the original permission said?
Because a condition on an estate permission can remove the right to convert the garage without applying, and you can't see that from the street. Ask the council for the original decision notice and read the conditions before you pay for drawings.
Our front garden is quite short. Can we still get a dropped kerb?
Only if there are at least 4.8 metres from the back of the footway to the front of the house. Bolton won't consider the application below that, and it won't put a crossing in a lay-by.
Can we turn the garage into a bedsit and let it?
Be careful. Since June 2025 a borough-wide Article 4 direction means turning a family house into a small house in multiple occupation needs planning permission. A separate dwelling in the garage can need permission whatever the building work involves.