Quick Answer
A loft conversion is one of the most cost-effective ways to add a bedroom and bathroom to your home. It typically adds 10-20% to your property value and avoids losing garden space.Types of Loft ConversionVelux/rooflight conversion is the simplest and cheapest (£20,000-30,000). N...
Key Information
- Last Updated:
- 6 Jun 2026
- Category:
- Extensions
- Reading Time:
- 1 min read
A loft conversion is one of the most cost-effective ways to add a bedroom and bathroom to your home. It typically adds 10-20% to your property value and avoids losing garden space.
Types of Loft Conversion
Velux/rooflight conversion is the simplest and cheapest (£20,000-30,000). No structural changes to the roof. Dormer conversion extends the roof vertically (£30,000-50,000). The most popular type. Hip-to-gable extends a hipped roof to a gable wall (£35,000-55,000). Mansard conversion replaces the entire roof slope (£45,000-70,000).
Building Regulations
All loft conversions need building regulations approval. Key requirements: fire-safe staircase with 30-minute fire doors, adequate structural support, and minimum headroom of 2.2m.
Leave a Comment
Share your experience or ask a question about this article.
I'm thinking of a dormer conversion, but I noticed the prices vary quite a bit. Could someone clarify why there's such a range within this type? Cheers!
When planning your Velux conversion, consider using triple-glazed rooflights for better insulation and noise reduction. It's a small detail that can make a big difference.
Just had a Velux conversion done in Bristol for £28k. Added 15% to our house value. Top tip – don't forget about those fire doors!
Just wondering, would a Velux conversion still add value to my home if I only needed another bedroom and didn't bother with a bathroom? Cheers!
Good guide. For mansard conversions, consider using timber trusses for additional strength & improved aesthetics. Always ensure your design adheres to Part L of the Building Regulations.
I'm curious about the cost estimates for each type of conversion. Are these rough averages including labour and materials?
Remember to consider roof pitch when planning. A minimum angle of 35 degrees is needed for most conversion types.
Just a note on Velux conversions: Ensure your chosen windows have suitable insulation and noise reduction properties for optimal comfort.
I'm considering a loft conversion in Bristol to add value to my terraced home. The Velux/rooflight conversion seems most suitable for my budget and roof type, but I'll make sure it meets those crucial building regulations too!
I'm considering a Velux conversion for my loft in Bristol. Any tips on how to maintain the character of my Victorian semi during construction?
Remember, for mansard conversions, you'll need to ensure the pitch is no greater than 70 degrees due to headroom requirements.
I'm interested in the Velux conversion for its cost-effectiveness but could someone clarify how it's possible without structural changes if I have a pitched roof?
I'm considering a Velux conversion. Can someone clarify if the costs stated include VAT? It's not specified in the text.
I'm excited to start my Velux conversion soon. Wondering if I need to install extra insulation? My current loft's quite draughty!