Conversions · Loft, garage & barn
The space you need is probably already there.
Lofts, garages and barns turned into rooms you’ll actually use. One team, a fixed itemised price, and every regulation handled for you.
What we do
Go up, go sideways, or go rural.
Whether it’s a dormer loft, a garage turned into a home office or a barn turned into a family home, the process is the same: proper drawings, a proper price, and one team responsible for the whole job.
- Rear dormer, hip-to-gable and mansard lofts
- Garage conversions, single and double
- Barn and outbuilding conversions
- Building control, party wall and structural work included
What to expect
Typical costs and timescales.
Every job is priced from its own drawings, but these are honest ballpark figures for the area so you can plan.
Rear dormer with a bedroom and en-suite. Rooflight-only lofts cost less, mansards more. Usually 6–8 weeks on site.
Single garage to a warm, dry living space. Add a bathroom or high-spec finishes and it rises. Typically 3–5 weeks.
Depends heavily on size, condition and spec. Six months to over a year. Some projects qualify for 0% VAT.
Why homeowners choose Propfix
Done once, done properly.
Local planning knowledge
We know how councils across North West London, Hertfordshire and Buckinghamshire apply the rules, and we tailor each application to match.
One accountable team
From permissions to painting you deal with Propfix. Engineers, trades, inspections and finishes are all booked and run by us.
Problems solved, not passed on
Low headroom, damp garage floors, tired beams. We plan for them up front and sort them if they appear, at the price we agreed.
What we need to quote
Send us two things and we’ll price the build.
Conversions are quoted from drawings, not guesses. Upload these with your quote request and we’ll come back with a full, itemised price. Not there yet? Get in touch and we’ll point you towards a good architect or planning consultant so you can get the drawings and approvals in place first. No hard sell, no obligation.
The full construction set, not concept sketches. These tell us exactly what is being built, so the price is real.
The planning approval or a lawful development certificate, with any conditions attached.
Straight answers
Conversion questions, answered.
Do I need planning permission for a loft conversion?
Usually not. Most loft conversions fall under permitted development as long as you stay within the volume limits (40m³ for a terrace, 50m³ for a semi or detached house) and don’t add a dormer to the front. You still need Building Regulations approval, and local rules such as Article 4 directions or conservation areas can change the picture. We check before we quote.
When does a loft or garage count as a bedroom?
Once it meets Building Regulations and has a completion certificate from building control. That means a proper staircase, fire protection, insulation, ventilation and structural sign-off. After that it is legally habitable and can be marketed as a bedroom.
Will I need a party wall agreement?
If the work touches a shared wall, such as steel beams going into a party wall for a loft, the Party Wall Act applies. You serve notice on your neighbour and may need a surveyor’s award. It is common in terraced and semi-detached homes and we factor it into the programme.
Can I extend a converted barn?
Sometimes. Barns converted under Class Q rarely have normal permitted development rights, so an extension usually needs full planning permission. Since May 2024 a single-storey rear extension of up to 4 metres can be allowed under strict criteria. Listed barns and conservation areas face tighter rules.
Accredited and accountable
Get started
Ready to unlock the space?
Send us your drawings and planning documents and we’ll price the conversion properly. Free, no obligation, and the price we quote is the price you pay.
Get my free quoteOr call 07872 606019 · email hello@prop-fix.co.uk
