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Cost Estimator
How Much Does a Loft Conversion Cost?
Estimate loft conversion costs based on conversion type and location.
๐Your location
โ๏ธJob details
Factors that affect cost
- Conversion type โ mansard and hip-to-gable involve more structural work
- Whether planning permission is required (permitted development limits apply)
- Staircase design and position โ a new staircase adds ยฃ3,000โยฃ8,000
- Standard of finish and whether an en-suite is included
๐ก Money-saving tips
- 1.A dormer loft conversion offers the best balance of cost and extra space
- 2.Check with your local council โ many conversions are permitted development
- 3.Always use a structural engineer; their fee (ยฃ500โยฃ1,500) can prevent costly errors
- 4.A loft conversion typically adds 20% to property value โ one of the best ROI home improvements