Cost to build a flat roof extension in W1C

Flat roof extension cost in W1C

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 W1C?

A flat roof extension ranges from the cheapest of £21,840 (Pillar Contractors Ltd based in W1K) to the dearest of £21,944 (Azur London based in W1U), 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 W1C by posting a job with HaMuch. We'll send it to extension builders in W1C.

Estimates for flat roof extension near W1C

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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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	£17,410
	Build a two storey extension	£87,865
	Build a timber frame extension	£25,910
	Install a swimming pool	£80,910
	Cost to build a single storey extension	£53,202
	Cost to build a side return extension	£40,488
	Install an RSJ	£2,110
	Build an outbuilding	£9,910
	Build a mansard loft conversion	£51,910
	Cost of a loft conversion	£32,907
	Build a kitchen extension	£41,910
	Build a hip to gable loft conversion	£41,910
	Build a granny annexe	£86,910
	Build a garden office	£9,910
	Convert a garage	£15,910
	Build a new garage	£18,410
	Build a flat roof extension	£21,910
	Build a dormer loft conversion	£41,910
	Lay a concrete foundation	£6,160
	Convert a bungalow loft	£28,910
	Basement conversion cost	£36,488

Business name	Flat roof extension cost
Pillar Contractors Ltd, 49 Grosvenor Street, Mayfair, London, Greater London, W1K	£21,840
Dominic Payte - Design & Build, 14 Hanover Square, Mayfair, Greater London, W1S	£21,848
Starfish Properties, 14 Hanover Street, 3rd Floor, London, W1S	£21,848
Azur London, Greater London, W1U	£21,944
Hestia Contractors Ltd, 207 Regent Street, London, Greater London, W1B	£21,848
Guildon LTD, Greater London, w1b	£21,944
CORRECTBUILDIV.LTD, Greater London, W1B	£21,944
We Love Build, Greater London, W1J	£21,944
We Love Build - Three Arches, London, Greater London, W1J	£21,840
Capatus properties ltd, Greater London, W1W	£21,944
Design 2000 UK Ltd, Greater London, W1W	£21,944
JK Doors, Fitzrovia, W1W	£21,888
Italian Soft Leather Purses, Greater London, W1W	£21,944
JAY Executinos LTD, London, W1W	£21,944
KBB Master Builder LTD, Greater London, W1W	£21,944
Eternal Solutions, Greater London, W1W	£21,944
KBB Master Builder Ltd, Greater London, W1W	£21,944
UCS UK Ltd, Greater London, W1W	£21,944
Grand Phase Ltd, 85 Great Portland Street, London, Greater London, W1W	£21,848
Teammax LTD, 85 Great Portland Street, London, Greater London, W1W	£21,848
Luxe Refurbs, 16 Berkeley Street, London, Greater London, W1J	£21,840
NK Living, Greater London, W1U	£21,944
Sehem Design, london, W1F	£21,944
Cornerstone, Greater London, W1F	£21,944
Mayfair Design, Greater London, W1J	£21,944

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Flat roof extension cost in W1C

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Flat roof extension cost in W1C

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