Prices vary significantly by loft size, number of windows and finish level, so treat any single figure with caution — here's a realistic range based on current UK market pricing.
Typical UK Price Ranges (2026)
- Small loft, two roof windows: roughly £15,000–£20,000
- Medium conversion, three to four windows: roughly £20,000–£30,000
- Larger conversion, four to six windows: roughly £30,000–£45,000 and above
These figures typically cover floor strengthening, insulation, plasterboarding, staircase and window installation. They're a general guide, not a quote — your actual cost depends heavily on your specific property, access, and finish standard.
What Actually Moves the Price
- Loft size and existing headroom
- Number and size of roof windows specified
- Whether structural floor strengthening is needed
- Staircase design and where it fits into the existing layout
- Finish standard — basic versus a fully fitted room
Getting an Accurate Figure for Your Property
- Book a proper survey. Generic guides can't account for your specific roof and layout.
- Get a detailed, itemised quote. So you know exactly what's included, not just a headline figure.
- Ask about phasing if budget is tight. Sometimes a project can be sensibly split into stages.
Want an accurate figure for your specific property? We'll survey your loft and give you a clear, itemised quote.
View Velux Windows →Why Choose Atlas Roofing Cheshire
We're a domestic and commercial roofing team covering Cheshire and the Wirral, based near Chester, so we know the area and can get to you quickly. Every job comes with clear pricing before work starts and workmanship you can rely on.