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	£17,382
	Build a two storey extension	£87,823
	Build a timber frame extension	£25,882
	Install a swimming pool	£80,882
	Cost to build a single storey extension	£52,638
	Cost to build a side return extension	£40,172
	Install an RSJ	£2,082
	Build an outbuilding	£9,882
	Build a mansard loft conversion	£51,882
	Cost of a loft conversion	£32,643
	Build a kitchen extension	£41,882
	Build a hip to gable loft conversion	£41,882
	Build a granny annexe	£86,882
	Build a garden office	£9,882
	Convert a garage	£15,882
	Build a new garage	£18,382
	Build a flat roof extension	£21,882
	Build a dormer loft conversion	£41,882
	Lay a concrete foundation	£6,132
	Convert a bungalow loft	£28,882
	Basement conversion cost	£36,172

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
D Tymczyszyn T/A Tym Building, North Finchley, N12	£21,856
Odp Builders, Whetstone, N20	£21,888
nava construction ltd, Greater London, N20	£21,944
Madewellbuilders Ltd, Finchley, N3	£21,888
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

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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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