Cost to build a flat roof extension in Hammersmith

Flat roof extension cost in Hammersmith

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 Hammersmith?

A flat roof extension ranges from the cheapest of £21,832 (JNJ Building Services Ltd based in W12) to the dearest of £21,944 (New Line Construction Ltd based in W6), 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 Hammersmith by posting a job with HaMuch. We'll send it to extension builders in Hammersmith.

Estimates for flat roof extension near Hammersmith

"Flat roof extension for a period mews terraced house. We'd like a bedroom extension with full bathroom and a roof top terrace. Footprint is roughly 8.5m x 6m."

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?
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What insulation do I need for a flat roof extension?

	Job	Estimate
	Underpinning a house	£17,395
	Build a two storey extension	£87,842
	Build a timber frame extension	£25,895
	Install a swimming pool	£80,895
	Cost to build a single storey extension	£52,894
	Cost to build a side return extension	£40,316
	Install an RSJ	£2,095
	Build an outbuilding	£9,895
	Build a mansard loft conversion	£51,895
	Cost of a loft conversion	£32,763
	Build a kitchen extension	£41,895
	Build a hip to gable loft conversion	£41,895
	Build a granny annexe	£86,895
	Build a garden office	£9,895
	Convert a garage	£15,895
	Build a new garage	£18,395
	Build a flat roof extension	£21,895
	Build a dormer loft conversion	£41,895
	Lay a concrete foundation	£6,145
	Convert a bungalow loft	£28,895
	Basement conversion cost	£36,316

Business name	Flat roof extension cost
GB Buildings & Renovations, London, London, Greater London, W6	£21,848
Lux Construction, Hammersmith, Greater London, W6	£21,848
New Line Construction Ltd, London, W6	£21,944
Jonathan P Spencer Design and Build Limited, London, Greater London, W6	£21,848
Darlo Ltd, London, W6	£21,944
Add Global, 71 Golhawk Road, London, Greater London, W12	£21,848
The Great Wolf Construction, Londonderry, W12	£21,944
Newpark Construction, Shepherd's Bush, W12	£21,888
Specialist Screeding, Hammersmith, W6	£21,888
Knight Refurbishment House Renovation, Greater London, W4	£21,944
Design 2 Finish, London, Greater London, SW13	£21,840
NuHome, London, W14	£21,944
Heaven Sent Construction, Shepherd's Bush, W12	£21,888
Clay Design & Build, Greater London, W12	£21,944
Hammerhead General Contractors Ltd, London, Greater London, W12	£21,848
home refurbishments, London, Greater London, W14	£21,848
JNJ Building Services Ltd, 151 Askew Road, Hammersmith, London, Lon, W12	£21,832
IC&T PROJECTS, Greater London, W12	£21,944
HUGHES BUILDERS, Shepherd's Bush, W12	£21,888
Synthesize, Greater London, sw6	£21,944
Extend, 320 Munster Road, Fulham, Greater London, SW6	£21,840
Natalia Kennerley, Greater London, W12	£21,944
Griana Builds, London, W14	£21,832
Smart Property Sourcing, Midlothian, W4	£21,944
2MO, Greater London, W14	£21,944

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Flat roof extension cost in Hammersmith

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Flat roof extension cost in Hammersmith

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