How HaMuch saves you money
Post your job for free
We send your job to ALL N21 extension builders
Compare quotes
Available extension builders in N21 reply
Save Money
Select your affordable N21 extension builder
Post your job
The00Company Ltd
Homeowners look no further if you want a qualified extension builder to work in your home. The00Company Ltd are tidy and neat, providing a quality ...
EVS ARCHITECTURE & CONSTRUCTION LTD
HOW WE WORK?We are here to design the best places!Our experience includes projects all over the world, from small scaled projects to large resident...
AGK Building Services Ltd
AGK Building Services Ltd is a small family-run business with more than 20 years' experience in the building services industry. We have a team of d...
Renova PMC
Renova PMC - bespoke construction, interior designers
Abarth Construction Ltd
We are an experienced team dedicated to designing property in a way that is both beautiful and practical. For most people buying a property is an e...
From £87,168
B&B London Construction Ltd
Arben Neza (Benny)
We are focused on delivering high quality loft conversions, house extensions, full or partial house refurbishment, also maximising the full potent...
From £87,256
S E H BUILDERS LTD
Winchmore Hill, N21
Need to find an Extension Builder near you for all your extension buildering work?
S E H BUILDERS LTD provides a local, trusted extension b...
From £86,984
TIPS CONSTRUCTION
Experienced extension builder ready to quote for your work. TIPS CONSTRUCTION is the best extension builder in N21. No obligation free quotes and m...
From £87,160
NexLevel Contractors Ltd
Nexlevel - An aspiring construction and refurbishment company situated in the London. As a family-run business that is meshed with love, we believe...
From £87,408
PonariBuilders Ltd
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Granny Annexe Cost in N21
Building a granny annexe ranges from £86,960 (The00Company Ltd based in N13) to £87,432 (AGK Building Services Ltd based in N14), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in N21 by posting a job with HaMuch. We will send it to extension builders in N21 who will be happy to help you.
- How much does a granny annexe cost to build in the UK?
- What is a granny annexe?
- How big can a granny annexe be?
- How to get planning permission for a granny annexe
- What is the granny annexe tax loophole?
- Does an annexe increase council tax?
- Do you need planning permission to convert a garage into a granny flat?
- Can you claim VAT back on a granny annexe?
- Can I let out my granny annexe?
- Does an annexe increase property value?
- Can a granny annexe be sold separately?
- Do you have to pay stamp duty on an annexe?
Get extension builder rates instantly
Estimates for common extension builder jobs in N21;
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.
Underpin a building - £17,666
Two storey extension - £88,250
Build a timber frame extension - £26,166
Build a swimming pool - £81,166
Single storey extension - £58,328
Side return extension - £43,372
Install an RSJ - £2,366
Outbuilding - £10,166
Build a Mansard loft conversion - £52,166
Loft conversion - £35,310
Build a kitchen extension - £42,166
Hip to gable loft conversion - £42,166
Granny annexe - £87,166
Garden office - £10,166
Convert a Garage - £16,166
Garage - £18,666
Build a flat roof extension - £22,166
Build a dormer loft conversion - £42,166
Concrete foundations - £6,416
Convert a bungalow loft - £29,166
Convert a basement - £39,372