Add the postcode for your project so the results are accurate (you'll need to do this later anyway!)
Loft Conversions in M21 (45)
Search results
Describe your job
Give us the details of your job and we'll send it to specialist trades for you
Describe your job
Receive multiple quotes for your job from reviewed and trusted tradespeople
Services & skills
BuilderLoft ConversionsAgricultural BuildingNew BuildsProject ManagementServices & skills
BuilderLoft ConversionsCladdingBasement / Cellar ConversionsEmergency Builder ServiceServices & skills
BuilderLoft ConversionsEmergency Builder ServiceNew BuildsConcretingServices & skills
BuilderLoft ConversionsGarage ConversionsMastic SealantRefurbishmentsServices & skills
BuilderLoft ConversionsStructural SteelsRefurbishmentsBasement / Cellar ConversionsServices & skills
BuilderLoft ConversionsWarehouse RackingBasement / Cellar ConversionsConcrete GaragesServices & skills
BuilderLoft ConversionsProperty Maintenance / RepairRefurbishmentsGarage ConversionsServices & skills
BuilderLoft ConversionsPartition WallsBasement / Cellar ConversionsRefurbishmentsServices & skills
BuilderLoft ConversionsWall Tie ReplacementsCladdingStructural SteelsServices & skills
BuilderLoft ConversionsStructural SteelsGarage ConversionsGeneral BuildingServices & skills
BuilderLoft ConversionsWorkshop Design / ConstructionPartition WallsEmergency Builder ServiceServices & skills
BuilderLoft ConversionsBasement / Cellar ConversionsCladdingConcrete Garages
Loft conversions in M21
Planning a loft conversion in M21? Whether you’re dreaming of a new bedroom, a home office, or just more space to breathe, we’re here to help.
Find rated loft conversion builders in M21 without the hassle
With Checkatrade, you can find checked loft conversion companies in M21 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 M21 loft conversion builders near you. It’s free to use, and you’re in control every step of the way.
What to expect from hiring a loft conversion builder in M21
Loft conversions are one of the most popular ways to add space (and value) to a home. Here’s what you need to know:
Common loft conversion jobs in M21
- Dormer loft conversions
- Hip-to-gable conversions
- Velux (rooflight) conversions
- Mansard conversions
- Bungalow loft extensions
Average cost of a loft conversion in M21
Loft conversions:
Expect to pay £29466 on average, with prices typically starting at £16572 up to £49330.
Loft ladder installers:
Expect to pay £396 on average, with prices typically starting at £297 up to £533.
Loft window installation:
Expect to pay £1276 on average, with prices typically starting at £784 up to £2046.
Roof light installation:
Expect to pay £1511 on average, with prices typically starting at £614 up to £3370.
Dormer windows:
Expect to pay £1841 on average, with prices typically starting at £977 up to £3217.
Explore our loft conversion cost guide for a detailed breakdown.
What’s 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 M21: Homeowners vs renters
If you own your home:
- You’re 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 can’t 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 M21
Need urgent loft work like a leak, collapsed ceiling, or unsafe structure? We’ve got you.
Search for emergency loft conversion services in M21 to find available trades fast.
Find a loft conversion builder for your job in M21
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; it’s a quick, easy way to get responses from loft builders covering your local area.
Looking for more tradespeople in M21?
Find Checkatrade reviewed Tradespeople, get a quote today, discover related services in M21 and check out our latest home improvement guides.
- Builder in M21
- Wall Tie Replacements in M21
- Brick Concrete Structural Repairs in M21
- Concreting in M21
- General Building in M21
- New Builds in M21
- Fire And Flood Renovation in M21
- Partition Walls in M21
- Agricultural Building in M21
- Basement Cellar Conversions in M21
- Extensions Conversions in M21
- Period Property Restoration in M21
- 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
- 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