Cost to build a flat roof extension in N3

Flat roof extension cost in N3

A flat roof extension is a great way to add extra space to your home without splashing out on the costs of a pitched roof extension. Often exempt from planning permission rules, you can build a flat roof extension up to 3 metres in height as long as it's not visible from a road. But how much do they cost in N3?

A flat roof extension ranges from the cheapest of £21,840 (AK Builders based in N3) to the dearest of £21,944 (Ninos Carpentry Ltd based in N3), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.

Find out how much your flat roof extension will cost in N3 by posting a job with HaMuch. We'll send it to extension builders in N3.

Estimates for flat roof extension near N3

How much does a flat roof extension cost?
Flat roof extension cost per m2
Factors affecting the cost of flat roof extensions
Advantages and disadvantages of flat roofs
Which is cheaper: a flat roof or pitched roof?
How long does a flat roof extension take?
Do you need planning permission for a flat roof extension?
How long does a flat roof last?
Can you walk on a flat roof extension?
What insulation do I need for a flat roof extension?

	Job	Estimate
	Underpinning a house	£17,399
	Build a two storey extension	£87,848
	Build a timber frame extension	£25,899
	Install a swimming pool	£80,899
	Cost to build a single storey extension	£52,978
	Cost to build a side return extension	£40,362
	Install an RSJ	£2,099
	Build an outbuilding	£9,899
	Build a mansard loft conversion	£51,899
	Cost of a loft conversion	£32,802
	Build a kitchen extension	£41,899
	Build a hip to gable loft conversion	£41,899
	Build a granny annexe	£86,899
	Build a garden office	£9,899
	Convert a garage	£15,899
	Build a new garage	£18,399
	Build a flat roof extension	£21,899
	Build a dormer loft conversion	£41,899
	Lay a concrete foundation	£6,149
	Convert a bungalow loft	£28,899
	Basement conversion cost	£36,362

Business name	Flat roof extension cost
L&V BUILDING CONSTRUCTION LTD, Finchley, N3	£21,864
www.craftedpeople.com, Finchley, N3	£21,888
Ninos Carpentry Ltd, Greater London, N3	£21,944
Lacon Design & Build, 287 Regent's Park Road, Finchley, Greater London, N3	£21,848
RF Building Services, Finchley, N3	£21,888
DS Construction, Finchley, N3	£21,888
DPS Building Ltd, 100 unit, 116 Ballards Lane, Finchley, N3	£21,848
Buildwiseonecompanyfoursolutions Ltd., London, Londonderry, N3	£21,848
Taylor Construction Services Ltd, London, N3	£21,944
Madewellbuilders Ltd, Finchley, N3	£21,888
BestDecorLondonLtd, Greater London, N3	£21,944
AK Builders, Finchley, N3	£21,840
D Tymczyszyn T/A Tym Building, North Finchley, N12	£21,856
PearTree Homes, Greater London, NW11	£21,944
Builders Are Us, London, N2	£21,944
Chelebi Builders, Greater London, N12	£21,944
Chelebi Builders, Greater London, N12	£21,944
Forts Developments LTD, Greater London, N12	£21,944
Forts Developments LTD, Forts Developments, Greater London, N12	£21,848
Coraff Flooring, 51 The Market Place, Falloden Way, Londo, NW11	£21,848
TBF Construction Ltd, Greater London, N12	£21,944
Fresh home builders UK LTD, London, Greater London, Nw11	£21,848
Fresh home builders UK LTD, Greater London, Nw11	£21,944
Gwe construction, Greater London, N12	£21,944
B. S. D. Design & Build Ltd, London, NW4	£21,888

Extend your N3 with an extension

Flat roof extension cost in N3

Estimates for common extension builder jobs in N3;

Rates for other N3 trades

Flat roof extension cost in N3

Get extension builder rates instantly