A wheelchair that will not fit through a bedroom or bathroom doorway turns a house into a series of obstacles. Before booking a builder to knock through a frame, it is worth knowing two things: how wide a doorway actually needs to be, and whether a cheaper fix will do the job. The answer to both questions is more forgiving than most people assume — and the gap between a full structural widening and a hardware swap is, in cash terms, roughly the difference between a week’s shopping and a family holiday.
How wide does a doorway need to be?
UK Building Regulations Approved Document M (Doc M) sets out clear opening widths for accessible doorways, and the numbers are worth writing down before you measure anything. "Clear opening width" is not the size of the door panel — it is the usable gap between the frame and the face of the door when it is open, which is always narrower than the door itself.
- 750mm is treated as the practical minimum for general internal doorways, enough for a standard manual wheelchair.
- 800mm is the more comfortable, future-proofing width recommended for principal rooms, and is generally required in non-domestic buildings.
- 850mm or more is better suited to powered wheelchairs or larger users, and is the benchmark for a fully wheelchair-designed home.
Most Victorian and interwar UK homes were built with doorways around 686mm to 726mm — comfortably below even the 750mm minimum. That gap is exactly what makes door widening one of the most common access adaptations requested by older households and families supporting a wheelchair user, alongside ramps and grab rails.
What full structural widening actually costs
Widening a doorway properly means removing the existing frame, cutting back the surrounding wall, and fitting a new, wider frame and door — work that has to account for whether the wall is a stud partition or solid brick, and whether it is load-bearing. General estimates for this kind of work in the UK sit in the region of £700 to £1,000 per door, and that is before decoration, a new door, or matching skirting and architrave. A stud-wall doorway can sometimes be widened in a matter of hours; a doorway in a solid brick wall, or one that needs a structural lintel, can take a contractor one to two days and typically costs more.
Multiply that per-door figure across a hallway, a bathroom and a bedroom, and it is easy to see why door widening is one of the adaptations the Disabled Facilities Grant is specifically designed to fund for households that qualify on means and need. It is also why it is worth checking, room by room, whether every doorway genuinely needs the structural treatment — because several of them may not.
The offset hinge: a £700 problem solved for a fraction of the price
Where a doorway is only narrowly too tight — a wheelchair that catches by 20 to 40mm, rather than one that will not fit by a country mile — a pair of offset (also sold as "swing-clear" or "expanding") hinges is frequently enough on its own. These are Z-shaped hinges that, when the door is opened, swing the entire door leaf clear of the frame instead of leaving part of it hanging across the opening. That single change can add up to roughly 50mm of usable clearance without touching the frame, the plaster, or the wall at all.
They are designed to be a straightforward swap: most fit using the same screw holes as the hinges already on the door, work on left- or right-hung doors by flipping the hinge pin, and can often be fitted by a competent DIYer or a general handyman in well under an hour per door. Because the work is confined to the hinge, not the frame, published pricing for the hardware itself is a small fraction of structural widening — typically in the region of £20 to £30 for a pair, based on the pricing commonly quoted by mobility-aid and hardware suppliers (UK-specific published prices are less common than US ones, so treat this as an approximate, not an exact, comparison). Add a modest call-out or fitting charge if you are not doing it yourself, and the total is still a very small percentage of a £700–£1,000 structural job.
Which fix actually applies to your doorway
| Situation | Likely fix | Typical cost |
|---|---|---|
| Wheelchair is within roughly 40–50mm of fitting | Offset / swing-clear hinges | ~£20–£30 hardware, plus fitting if not DIY |
| Doorway is well under 750mm and the wall is a stud partition | Full structural widening | £700–£1,000+ per door |
| Doorway is well under 750mm and the wall is solid brick, or load-bearing | Structural widening with lintel work | At the higher end of £700–£1,000+, plus longer lead time |
| Threshold strip or raised sill is also catching the wheelchair | Threshold ramp or flush threshold alongside either fix above | Modest additional cost, often bundled into the same job |
The practical order of operations, before any money changes hands, is: measure the clear opening width of every doorway a wheelchair needs to pass through, note which ones are close to 750mm and which are dramatically under it, and get an occupational therapist or an accredited installer to confirm whether hinges alone will solve the near-miss cases. That single assessment can turn a whole-house quote of several thousand pounds into a mix of one or two structural jobs and several £20 hinge swaps.
Funding the work
Where full structural widening is genuinely needed, it typically falls within the kind of home adaptation work the Disabled Facilities Grant is designed to cover, subject to the usual means test and local authority assessment. An occupational therapist’s assessment is usually the first step in that process, and it is worth requesting one specifically to establish which doorways need which fix — rather than assuming every tight doorway in the house requires the same, most expensive answer.
The bottom line
Door widening for wheelchair access is real, sometimes necessary work, and UK building guidance gives a clear target: 750mm as a working minimum, 800mm where you can get it. But not every tight doorway needs a builder. Before committing to a £700-plus structural job on every room, measure the actual shortfall on each doorway in turn — a genuinely narrow near-miss is very often a hinge problem, not a wall problem, and it is worth ruling that out first.