Cost to build a flat roof extension in NW1

Flat roof extension cost in NW1

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 NW1?

A flat roof extension ranges from the cheapest of £21,848 (NWL BUILDERS LTD based in W1T) to the dearest of £22,400 (ELJHANI BUILDING & PROPERTY MANAGEMENT SERVICES LTD based in NE4), 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 NW1 by posting a job with HaMuch. We'll send it to extension builders in NW1.

Estimates for flat roof extension near NW1

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?
How long does a flat roof extension take?
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	£17,433
	Build a two storey extension	£87,900
	Build a timber frame extension	£25,933
	Install a swimming pool	£80,933
	Cost to build a single storey extension	£53,662
	Cost to build a side return extension	£40,748
	Install an RSJ	£2,133
	Build an outbuilding	£9,933
	Build a mansard loft conversion	£51,933
	Cost of a loft conversion	£33,123
	Build a kitchen extension	£41,933
	Build a hip to gable loft conversion	£41,933
	Build a granny annexe	£86,933
	Build a garden office	£9,933
	Convert a garage	£15,933
	Build a new garage	£18,433
	Build a flat roof extension	£21,933
	Build a dormer loft conversion	£41,933
	Lay a concrete foundation	£6,183
	Convert a bungalow loft	£28,933
	Basement conversion cost	£36,748

Business name	Flat roof extension cost
Masters Construction UK, London, NW1	£22,000
McCracken Consult & Construct, Greater London, NW1	£21,944
KRIER DESIGN, Greater London, NW1	£21,944
UR Interior, Greater London, NW1	£21,944
NWL BUILDERS LTD, 4th Floor, Silverstream House, 45 Fitzroy Street, Fitzrovia, London, Greater London, W1T	£21,848
Square Foot Basements Ltd, London, Greater London, NW1	£21,848
Simone Pinducciu - Mesoni Ltd, Greater London, W1W	£21,944
plansing, london, W1W	£21,888
NARCH Ltd, Greater London, WC1H	£21,944
Forster & Sons, London, Greater London, NW1	£21,848
ELJHANI BUILDING & PROPERTY MANAGEMENT SERVICES LTD, Newcastle upon Tyne , NE4	£22,400
Mark Collett Design and Build, 8 St Georges Terrace, Primrose Hill, London, Greater London, NW1	£21,848
Citygate, London, WC1H	£21,944
Atlant Construction, London, Greater London, W1T	£21,848
Capatus properties ltd, Greater London, W1W	£21,944
Teammax LTD, 85 Great Portland Street, London, Greater London, W1W	£21,848
Italian Soft Leather Purses, Greater London, W1W	£21,944
Design 2000 UK Ltd, Greater London, W1W	£21,944
JK Doors, Fitzrovia, W1W	£21,888
Grand Phase Ltd, 85 Great Portland Street, London, Greater London, W1W	£21,848
Eternal Solutions, Greater London, W1W	£21,944
KBB Master Builder Ltd, Greater London, W1W	£21,944
JAY Executinos LTD, London, W1W	£21,944
KBB Master Builder LTD, Greater London, W1W	£21,944
UCS UK Ltd, Greater London, W1W	£21,944

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Flat roof extension cost in NW1

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Flat roof extension cost in NW1

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