How Much Does Loft Conversion Cost?
A loft conversion is one of the most cost-effective ways to add living space. Options range from simple Velux conversions to full dormer or mansard conversions with en-suite bathrooms.
Typical UK Costs
Budget£20,000Basic specification
Average£40,000Mid-range finish
Premium£65,000High-end specification
Get Your Personalised Estimate
These are average UK costs. Get a more accurate estimate tailored to your specific project details and location.
Get a Personalised EstimateWhat Affects the Cost?
- Type of conversion (Velux, dormer, mansard, hip-to-gable)
- Size and head height
- Staircase design
- En-suite bathroom addition
- Structural reinforcement needs
Frequently Asked Questions
Do I need planning permission for a loft conversion?
Most loft conversions fall under Permitted Development rights. However, mansard conversions and some dormer types in conservation areas require planning permission.
How long does a loft conversion take?
Typically 6-12 weeks, depending on the type. A Velux conversion is the quickest, while a mansard conversion takes the longest.