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Loft Conversions in London Greater London (204)
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10.0
âI selected J Highgate from Checkatrade based on their reviews and I couldn't have made a better choice. This was for a ground floor extension, new kitchen and other refurbishment needed to a fairly run-down house we purchased. From the start right throughout the around 10 weeks duration of the works, the entire team were simply superb and a delight to work with. The team were proactive in coming up with ideas for consideration when some re-thinking became necessary at critical parts of the works. The final outcome and quality of work was 10/10. High commendations all round.â
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Top rated Loft Conversions in London
10
/10
118 ratings
Our Loft Conversions in London are rated an average of 10 out of 10 based on a sample of 118 reviews from customers like you*
*This review aggregate is based on real customer reviews from a randomly selected postcode in this area
Loft conversions in London
Planning a loft conversion in London? Whether youâre dreaming of a new bedroom, a home office, or just more space to breathe, weâre here to help.
Find rated loft conversion builders in London without the hassle
With Checkatrade, you can find checked loft conversion companies in London and get quotes from trades who cover your area, fast. No faff. Just a simple way to turn that empty attic into something brilliant.
Post your job in minutes or browse reviewed London loft conversion builders near you. Itâs free to use, and youâre in control every step of the way.
What to expect from hiring a loft conversion builder in London
Loft conversions are one of the most popular ways to add space (and value) to a home. Hereâs what you need to know:
Common loft conversion jobs in London
- Dormer loft conversions
- Hip-to-gable conversions
- Velux (rooflight) conversions
- Mansard conversions
- Bungalow loft extensions
Average cost of a loft conversion in London
Loft conversions:
Expect to pay ÂŁ35928 on average, with prices typically starting at ÂŁ23495 up to ÂŁ54370.
Loft ladder installers:
Expect to pay ÂŁ382 on average, with prices typically starting at ÂŁ294 up to ÂŁ505.
Loft window installation:
Expect to pay ÂŁ1811 on average, with prices typically starting at ÂŁ1259 up to ÂŁ2651.
Roof light installation:
Expect to pay ÂŁ2273 on average, with prices typically starting at ÂŁ1229 up to ÂŁ4142.
Dormer windows:
Expect to pay ÂŁ1862 on average, with prices typically starting at ÂŁ1153 up to ÂŁ3053.
Explore our loft conversion cost guide for a detailed breakdown.
Whatâs included in a loft conversion quote?
- Design and structural plans
- Building work and insulation
- Stairs, electrics, plumbing
- Windows, flooring, and finishes
Extra costs to think about:
- Architect or structural engineer fees
- Planning permission (if required)
- Bathrooms or heating upgrades
- Underfloor heating or bespoke storage
How long does a loft conversion take?
Velux: 4 - 6 weeks
Dormer: 10 - 12 weeks
Mansard: 8 - 10 weeks
Loft conversions in London: Homeowners vs renters
If you own your home:
- Youâre responsible for planning, permissions, and hiring.
- Check if you need planning permission; many lofts fall under permitted development, but not all.
- Building regulations always apply. A loft conversion without sign-off could cause issues later (including invalidating home insurance).
If you rent:
- You canât carry out major work like a loft conversion.
- Speak to your landlord if you notice issues in the loft space (leaks, insulation problems etc.).
- If you spot an unregulated loft conversion, flag it with your landlord or letting agent.
Emergency loft conversion help in London
Need urgent loft work like a leak, collapsed ceiling, or unsafe structure? Weâve got you.
Search for emergency loft conversion services in London to find available trades fast.
Find a loft conversion builder for your job in London
Here are some common requests from homeowners and renters alike:
- Loft boarding or insulation
- Full loft extensions
- Velux or dormer installations
- Bungalow loft conversion design
- Loft conversion quotes
- Structural inspections or fixes
- Loft stairs installation
- Loft storage or lighting upgrades
- Fixing illegal or unregulated conversions
Use our request a quote feature; itâs a quick, easy way to get responses from loft builders covering your local area.
Looking for more tradespeople in London?
Find Checkatrade reviewed Tradespeople, get a quote today, discover related services in London and check out our latest home improvement guides.
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- Loft Conversions in London
- Loft Conversions in Newcastle Upon Tyne
- Loft Conversions in Manchester
- Loft Conversions in Liverpool
- Loft Conversions in Glasgow
- Loft Conversions in Nottingham
- Loft Conversions in Leeds
- Loft Conversions in Brighton
- Loft Conversions in York
- Loft Conversions in Birmingham
- Loft Conversions in Bristol
- Loft Conversions in Leicester