Cost to build a flat roof extension in Harley Street

Flat roof extension cost in Harley Street

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 Harley Street?

A flat roof extension ranges from the cheapest of £21,840 (Pillar Contractors Ltd based in W1K) to the dearest of £21,944 (Capatus properties ltd based in W1W), 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 Harley Street by posting a job with HaMuch. We'll send it to extension builders in Harley Street.

Estimates for flat roof extension near Harley Street

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	£17,408
	Build a two storey extension	£87,863
	Build a timber frame extension	£25,908
	Install a swimming pool	£80,908
	Cost to build a single storey extension	£53,170
	Cost to build a side return extension	£40,470
	Install an RSJ	£2,108
	Build an outbuilding	£9,908
	Build a mansard loft conversion	£51,908
	Cost of a loft conversion	£32,892
	Build a kitchen extension	£41,908
	Build a hip to gable loft conversion	£41,908
	Build a granny annexe	£86,908
	Build a garden office	£9,908
	Convert a garage	£15,908
	Build a new garage	£18,408
	Build a flat roof extension	£21,908
	Build a dormer loft conversion	£41,908
	Lay a concrete foundation	£6,158
	Convert a bungalow loft	£28,908
	Basement conversion cost	£36,470

Business name	Flat roof extension cost
Capatus properties ltd, Greater London, W1W	£21,944
Italian Soft Leather Purses, Greater London, W1W	£21,944
JK Doors, Fitzrovia, W1W	£21,888
Design 2000 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
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
JAY Executinos LTD, London, W1W	£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
plansing, london, W1W	£21,888
Simone Pinducciu - Mesoni Ltd, Greater London, W1W	£21,944
Dominic Payte - Design & Build, 14 Hanover Square, Mayfair, Greater London, W1S	£21,848
Azur London, Greater London, W1U	£21,944
NK Living, Greater London, W1U	£21,944
Starfish Properties, 14 Hanover Street, 3rd Floor, London, W1S	£21,848
NWL BUILDERS LTD, 4th Floor, Silverstream House, 45 Fitzroy Street, Fitzrovia, London, Greater London, W1T	£21,848
Atlant Construction, London, Greater London, W1T	£21,848
Pillar Contractors Ltd, 49 Grosvenor Street, Mayfair, London, Greater London, W1K	£21,840
Sehem Design, london, W1F	£21,944
Cornerstone, Greater London, W1F	£21,944

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Flat roof extension cost in Harley Street

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Flat roof extension cost in Harley Street

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