Garage conversion cost in Telford ranges from around £8,000 for a basic single garage room to £32,000 for a fully fitted double garage annexe with plumbing. Telford has one advantage most towns do not: because so much of the borough was built within a relatively narrow New Town construction window, costs on that stock are often more predictable than in a town with a longer, more mixed building history. The exception is the older settlements absorbed into the New Town — Wellington, Madeley, Newport, Shifnal and Much Wenlock — where genuinely historic housing brings its own variables. This guide sets out realistic 2026 figures for the Telford area and what actually moves them.
Garage Conversion Costs by Type in Telford
These are realistic 2026 ranges locally, covering the structural and fit-out work involved. They exclude furniture and any work to the rest of the house.
- Single garage, basic room: £8,000 to £12,500
- Single garage, home office: £8,500 to £13,000, reflecting the additional electrical first fix
- Single garage, bedroom: £10,000 to £15,000, reflecting the escape window and fire door work
- Single garage with en suite: £14,500 to £20,500, or £17,500 to £24,000 as a bedroom with en suite
- Double garage, single open room: £14,500 to £21,000
- Double garage, partitioned into two rooms: £16,500 to £24,500
- Double garage annexe with kitchenette and shower: £23,000 to £32,000
- Partial conversion, room plus retained storage area: £9,000 to £14,000
What Actually Drives the Price
What the room is for
This matters more on a garage conversion than almost any other type of building project, because the shell is already there and the cost is almost entirely in the fit-out. A basic room needs insulation, a floor, plastering and minimal electrics. A bedroom adds an escape window and possibly a fire door. A room with plumbing adds several thousand pounds for drainage that usually has to be run some distance to connect to the existing system.
New Town estate versus older absorbed settlements
On Telford’s core New Town estates, built consistently from the late 1960s through the 1980s, garages are generally predictable in construction, and pricing is correspondingly straightforward once the survey confirms the build phase. On older properties around the historic centres of Wellington, Madeley, Newport, Shifnal and Much Wenlock, garages are more often later additions — detached single-storey structures rather than integral parts of the house — and need treating as standalone buildings with their own foundation and roof checks. This typically adds £2,000 to £5,000 over a comparable New Town conversion.
Trussed roof construction
Roof trusses became standard UK housebuilding practice from the 1960s onward, and Telford’s main construction period sits squarely within that window. This rarely affects a straightforward room conversion, since the roof is left in place, but it becomes relevant if any alteration to the roof is being considered, and we confirm construction type at survey rather than assume.
Damp proofing
Almost every garage floor was built without a damp proof membrane to modern standards. Bringing the slab up to standard adds £1,500 to £3,000 depending on floor area, and it is not a step worth compromising on regardless of which part of the borough the property sits in.
Fire safety for bedrooms
A bedroom needs a suitable escape window and, where the room sits on an escape route through the house, a fire door with self-closer. This is rarely expensive in isolation but needs planning in from the start.
Access
Most of Telford’s New Town estate properties have straightforward driveway access. The historic centres of Wellington, Newport, Shifnal, Madeley and Much Wenlock can have narrower streets and limited parking, adding £500 to £1,500 for materials handling.
Three Worked Examples
A 1970s single garage on a New Town estate, converted to a home office. Standard integral construction, trussed roof left undisturbed, straightforward electrical first fix. Around £10,500.
A detached garage on an older property near Wellington’s historic centre, converted to a bedroom. Standalone structure needing its own foundation check and a longer connection back to the house for services, plus escape window and fire safety design. Around £16,500, toward the upper end because of the detached construction.
A double garage on a larger property in Shifnal, converted to an annexe with shower and kitchenette. Later, more substantial construction typical of the town’s more affluent housing stock, straightforward drainage run given the property’s layout. Around £29,000.
Costs That Are Easy to Forget
- Building Regulations fees: £300 to £600 for a typical garage conversion
- Damp survey: £150 to £300 if the slab condition is uncertain and needs professional assessment before design
- Structural engineer: £400 to £800 where the roof or a partition wall needs calculations, more common on detached garage conversions and double garage splits
- Planning application: £258 where one is needed, typically only for larger external alterations or work near a historic centre
- Redecoration nearby: the hallway or landing adjoining the converted space sometimes needs minor making good
Does a Garage Conversion Add Value in Telford?
A garage conversion typically adds meaningfully more value than it costs, particularly where it takes a house from three bedrooms to four, since a considerable share of Telford’s original New Town housing was built as compact three-bedroom family homes now needing more space as those households have grown. A garage conversion is usually the cheapest way to add that fourth bedroom, because there is no roof structure to alter and no staircase to build.
The trade-off worth weighing is parking, though this matters less across most of Telford’s estate housing, where a driveway in front of the garage means off-street parking remains available regardless of what happens inside.
How Long Does It Take?
- Single garage, basic room or office: two to four weeks
- Single garage, bedroom: three to five weeks
- Single garage with en suite: five to seven weeks
- Double garage, single room: four to six weeks
- Double garage, partitioned or with plumbing: six to eight weeks
Add one to two weeks beforehand for Building Regulations submission, longer if a structural engineer or planning application is involved. Detached garage conversions on the older housing around Wellington, Madeley and the other historic centres can add a further week for the additional structural survey and design work.
Paying for It
Garage conversions are normally paid in staged payments tied to milestones rather than a deposit and a final bill: a modest deposit for materials, then payments at completion of structural work, first fix, and completion.
Treat a request for a large sum up front as a warning sign. A deposit covering initial materials is reasonable. A demand for thirty or forty per cent before work starts is not, and it remains the single most common precursor to trouble in domestic building work.
Comparing Quotes Properly
Ask whether the contractor has actually been in the garage and checked the slab for damp. A figure given over the phone or from a photograph is a guess, and the guess almost always moves once the floor is properly assessed.
Then check that damp proofing, insulation, Building Regulations submission and making good are all inside the quoted figure rather than sitting outside it as provisional sums. A quote that looks a few thousand pounds cheaper but excludes damp proofing the slab is not actually cheaper.
Structural requirements for insulation, damp proofing and fire escape in converted garages are set out by LABC.
For a figure specific to your property, we survey the garage and issue a fixed written quotation. It is worth reading what a single garage conversion involves, or comparing it against a double garage conversion if you have more space to work with.