Cost to build a flat roof extension in W1B

Flat roof extension cost in W1B

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 W1B?

A flat roof extension ranges from the cheapest of £21,840 (We Love Build - Three Arches based in W1J) to the dearest of £21,944 (Sehem Design based in W1F), 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 W1B by posting a job with HaMuch. We'll send it to extension builders in W1B.

Estimates for flat roof extension near W1B

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?
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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	£17,406
	Build a two storey extension	£87,859
	Build a timber frame extension	£25,906
	Install a swimming pool	£80,906
	Cost to build a single storey extension	£53,125
	Cost to build a side return extension	£40,445
	Install an RSJ	£2,106
	Build an outbuilding	£9,906
	Build a mansard loft conversion	£51,906
	Cost of a loft conversion	£32,871
	Build a kitchen extension	£41,906
	Build a hip to gable loft conversion	£41,906
	Build a granny annexe	£86,906
	Build a garden office	£9,906
	Convert a garage	£15,906
	Build a new garage	£18,406
	Build a flat roof extension	£21,906
	Build a dormer loft conversion	£41,906
	Lay a concrete foundation	£6,156
	Convert a bungalow loft	£28,906
	Basement conversion cost	£36,445

Business name	Flat roof extension cost
Sehem Design, london, W1F	£21,944
Cornerstone, Greater London, W1F	£21,944
Starfish Properties, 14 Hanover Street, 3rd Floor, London, W1S	£21,848
Big Mamma, Greater London, W1F	£21,944
Dominic Payte - Design & Build, 14 Hanover Square, Mayfair, Greater London, W1S	£21,848
Elv8 Interiors, Greater London, W1B	£21,944
Guildon LTD, Greater London, w1b	£21,944
Hestia Contractors Ltd, 207 Regent Street, London, Greater London, W1B	£21,848
CORRECTBUILDIV.LTD, Greater London, W1B	£21,944
We Love Build, Greater London, W1J	£21,944
JK Doors, Fitzrovia, W1W	£21,888
Capatus properties ltd, Greater London, W1W	£21,944
Italian Soft Leather Purses, Greater London, W1W	£21,944
Design 2000 UK Ltd, Greater London, W1W	£21,944
Teammax LTD, 85 Great Portland Street, London, Greater London, W1W	£21,848
JAY Executinos LTD, London, W1W	£21,944
KBB Master Builder LTD, Greater London, W1W	£21,944
Grand Phase Ltd, 85 Great Portland Street, London, Greater London, W1W	£21,848
UCS UK Ltd, Greater London, W1W	£21,944
Eternal Solutions, Greater London, W1W	£21,944
KBB Master Builder Ltd, Greater London, W1W	£21,944
We Love Build - Three Arches, London, Greater London, W1J	£21,840
Luxe Refurbs, 16 Berkeley Street, London, Greater London, W1J	£21,840
Pillar Contractors Ltd, 49 Grosvenor Street, Mayfair, London, Greater London, W1K	£21,840
Atlant Construction, London, Greater London, W1T	£21,848

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Flat roof extension cost in W1B

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Flat roof extension cost in W1B

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