Turn unused attic space into a beautiful, functional room — without the cost or upheaval of moving. One local team manages your design, planning and build from start to finish.
Why Oxford homeowners choose us
Not general builders who occasionally take on a loft — a specialist team that knows Oxford roofs, Oxford planners, and Oxford properties in detail.
01
We know the difference between a Jericho terrace, a Headington semi and a North Oxford detached — before we even survey it.
02
Design, planning, Building Regs, construction and finishing — a single project manager, not five separate trades to chase.
03
An itemised written quote valid for 60 days. No vague estimates that balloon once work begins.
04
Every structural element is covered, backed by full public liability and professional indemnity insurance.
05
Rated across quality, communication, timekeeping and value by homeowners we’ve already worked with.
06
You stay living in your home. Dust barriers, daily clean-up, and work scheduled around your routine.
Conversion types
Every roof is different. Here’s how the four main conversion types actually change your roofline — and which Oxford properties suit each.
Usually no planning needed
Windows fitted straight into the existing roof slope — no change to the roof shape. Fastest and most affordable option, done in 4–6 weeks.
Often permitted development
The roof is extended outward to create standing headroom and real floor space. Oxford’s most popular conversion, especially rear dormers.
Usually needs planning permission
The sloped side of a hipped roof is rebuilt as a vertical gable wall — substantially more space for semi-detached and detached homes.
Usually needs planning permission
A near-vertical wall with a flat top reshapes the whole roof — maximum space and value, best suited to detached Oxford properties.
Planning & regulations
Many Oxford loft conversions are built under permitted development and never need a planning application. We check this for you at the free survey stage.
| Route | Typical timeline |
|---|---|
| Permitted development only | 2–3 weeks approval, then straight to start |
| Planning permission required | 8–12 weeks approval |
| Conservation area properties | 12–16 weeks approval |
Cost guide
Transparent, itemised quotes — no hidden fees, no estimates that grow once work has started.
| Conversion type | Typical cost | Timeline | Space created |
|---|---|---|---|
| Rooflight (Velux) | £28,000 – £35,000 | 4–6 weeks | 300–400 sq ft |
| Rear dormer | £35,000 – £48,000 | 6–8 weeks | 350–450 sq ft |
| Hip to gable | £42,000 – £55,000 | 8–10 weeks | 400–500 sq ft |
| Mansard | £50,000 – £70,000 | 10–12 weeks | 450–550 sq ft |
How it works
We visit your Oxford property, assess the loft, and talk through what you want the space to do — no obligation.
3D visualisations plus a full written quote covering layout, windows, staircases and structural work, valid for 60 days.
We prepare and submit every application, liaising directly with Oxford City Council on your behalf.
Scaffolding and roof opening, then structural work, external dormer/roofing, and finally electrics, plumbing, insulation and plastering.
Decorating, fixtures, final Building Control inspection, and a full handover pack with certificates and your 10-year guarantee.
Where we work
We also cover Kidlington, Abingdon, Witney and other Oxfordshire locations within 15 miles of the city centre — and know the local building styles and planning quirks of every one of them.
Questions
Most projects take 6–12 weeks of construction: rooflight conversions are fastest at 4–6 weeks, dormers take 6–8 weeks, and hip to gable or mansard conversions take 8–12 weeks. Add planning approval time if your project needs it.
No — almost all our clients stay in their home throughout. Construction happens above your living space, dust barriers protect the rest of the house, and any brief service interruptions are scheduled and communicated in advance.
Typically 20–30%, depending on property type and conversion quality. Adding a bedroom with an en-suite bathroom generally delivers the strongest return.
No — many qualify as permitted development, particularly rear dormers and rooflight conversions. Conservation areas, listed buildings, front dormers and hip to gable projects are more likely to need permission. We check this during your free survey.
Building Regulations require at least 2.2m of headroom across 50% of the loft area. Most Oxford properties with a pitched roof already have this; where they don’t, we discuss options during your survey.
Yes — a full bathroom or en-suite typically adds £4,000–£8,000 and makes the new space significantly more functional and valuable.
Our upfront survey catches almost everything, but if anything unexpected turns up we stop, explain the issue and cost options, and never proceed without your written approval.
Get started
Join the hundreds of Oxford homeowners who’ve added space and value to their home with us. Ten years of local experience, transparent pricing, and a 10-year structural guarantee on every job.
A leading specialist loft conversion builder in Oxford. We are a one stop design and build loft conversion. Based and working in and around the Oxfordshire area, Oxford Loft Conversions will professionally manage and build the complete loft project.
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