Included in the estimate
- Main structural work for your chosen loft type
- New floor structure and staircase installation
- Insulation to current building regulations
- Plastering, electrics and heating connections
- Rooflights or dormer windows you select
Get an instant, realistic estimate for your project, built on 2026 market rates for your conversion type, size and region.
Five quick details and you will see a realistic 2026 cost range instantly.
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It gives an instant estimate based on 2026 national averages for each loft type, size, property and region. It is a realistic starting point. Your final quote depends on your specific property and chosen finishes.
Yes. You can estimate costs for Velux, Dormer, Hip to gable, L-shaped and Mansard conversions across all UK regions.
An estimate is a quick guide to average costs. A quote is tailored to your property after a specialist reviews the details. Use the calculator to budget, then compare quotes for exact pricing.
Completely free, with no email required to see your estimate. Comparing quotes from specialists is also free and no obligation.
Compare Velux, Dormer, Hip to gable and Mansard to find the best fit.
Read guideA full breakdown of what drives price and how to budget for your project.
Read guideLoans, grants and budgeting tips to make your loft project affordable.
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