Cost to build a flat roof extension in North Finchley

Flat roof extension cost in North Finchley

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 North Finchley?

A flat roof extension ranges from the cheapest of £21,280 (Onyx Iv based in N11) to the dearest of £22,000 (Homeworks Design & Build Ltd based in N20), 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 North Finchley by posting a job with HaMuch. We'll send it to extension builders in North Finchley.

Estimates for flat roof extension near North Finchley

How much does a flat roof extension cost?
Flat roof extension cost per m2
Factors affecting the cost of flat roof extensions
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	Job	Estimate
	Underpinning a house	£17,381
	Build a two storey extension	£87,821
	Build a timber frame extension	£25,881
	Install a swimming pool	£80,881
	Cost to build a single storey extension	£52,613
	Cost to build a side return extension	£40,157
	Install an RSJ	£2,081
	Build an outbuilding	£9,881
	Build a mansard loft conversion	£51,881
	Cost of a loft conversion	£32,631
	Build a kitchen extension	£41,881
	Build a hip to gable loft conversion	£41,881
	Build a granny annexe	£86,881
	Build a garden office	£9,881
	Convert a garage	£15,881
	Build a new garage	£18,381
	Build a flat roof extension	£21,881
	Build a dormer loft conversion	£41,881
	Lay a concrete foundation	£6,131
	Convert a bungalow loft	£28,881
	Basement conversion cost	£36,157

Business name	Flat roof extension cost
Gwe construction, Greater London, N12	£21,944
TBF Construction Ltd, Greater London, N12	£21,944
Forts Developments LTD, Forts Developments, Greater London, N12	£21,848
Forts Developments LTD, Greater London, N12	£21,944
Chelebi Builders, Greater London, N12	£21,944
Chelebi Builders, Greater London, N12	£21,944
Builder for London, North Finchley, N12	£21,888
Prime UK Contractors Ltd, London, N12	£21,944
Odp Builders, Whetstone, N20	£21,888
nava construction ltd, Greater London, N20	£21,944
Savvas Construction (UK) Ltd, Greater London, N20	£21,944
DPS Building Ltd, 100 unit, 116 Ballards Lane, Finchley, N3	£21,848
D.J Coyle & Co.Ltd, Whetstone, N20	£21,888
AK Builders, Finchley, N3	£21,840
Raf's Building Service, Friern Barnet, N11	£21,856
Onyx Iv, London, N11	£21,280
Homeworks Design & Build Ltd, London, N20	£22,000
Taylor Construction Services Ltd, London, N3	£21,944
Builders Are Us, London, N2	£21,944
Ninos Carpentry Ltd, Greater London, N3	£21,944
RF Building Services, Finchley, N3	£21,888
Keenan Construction, North London Business Park, Building 3, London, Greater London, N11	£21,848
Urban Design Build, 84 George Crescent, London, Greater London, N10	£21,848
Nava Construction LTD, 48 Northway house, London, Greater London, N20	£21,848
L&V BUILDING CONSTRUCTION LTD, Finchley, N3	£21,864

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Flat roof extension cost in North Finchley

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Flat roof extension cost in North Finchley

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