Cost to build a flat roof extension in N1c

Flat roof extension cost in N1c

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 N1c?

A flat roof extension ranges from the cheapest of £21,848 (Facit Homes based in N1) to the dearest of £22,000 (Masters Construction UK based in NW1), 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 N1c by posting a job with HaMuch. We'll send it to extension builders in N1c.

Estimates for flat roof extension near N1c

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	£17,435
	Build a two storey extension	£87,903
	Build a timber frame extension	£25,935
	Install a swimming pool	£80,935
	Cost to build a single storey extension	£53,707
	Cost to build a side return extension	£40,773
	Install an RSJ	£2,135
	Build an outbuilding	£9,935
	Build a mansard loft conversion	£51,935
	Cost of a loft conversion	£33,144
	Build a kitchen extension	£41,935
	Build a hip to gable loft conversion	£41,935
	Build a granny annexe	£86,935
	Build a garden office	£9,935
	Convert a garage	£15,935
	Build a new garage	£18,435
	Build a flat roof extension	£21,935
	Build a dormer loft conversion	£41,935
	Lay a concrete foundation	£6,185
	Convert a bungalow loft	£28,935
	Basement conversion cost	£36,773

Business name	Flat roof extension cost
Vision Construct, Greater London, N1	£21,944
Cavendish Builds, Greater London, N1	£21,944
Atelier Design & Build, Greater London, N1	£21,944
Murphy London Ltd, Greater London, N1	£21,944
Smith Morgan, Greater London, N1	£21,944
DeHome Studio, Greater London, N1	£21,944
Masters Construction UK, London, NW1	£22,000
NARCH Ltd, Greater London, WC1H	£21,944
GD CONSTRUCTION, London, WC1X	£22,000
McCracken Consult & Construct, Greater London, NW1	£21,944
UR Interior, Greater London, NW1	£21,944
KRIER DESIGN, Greater London, NW1	£21,944
Minton Builders LTD, Greater London, N1	£21,944
Buildwiser, King's Cross, WC1X	£21,864
Citygate, London, WC1H	£21,944
Gordon Construction, Cambridgeshire, N1	£21,944
Crowngate Construction, Warwickshire, N1	£21,944
Rabjohn Construction Ltd, South Yorkshire, N1	£21,944
Novo London Design and Build, Greater London, N1	£21,944
Centaurus Construction Limited, Greater London, N1	£21,944
Cedar Developments, West Lothian, N1	£21,944
Facit Homes, 3A Godson Street, London, Greater London, N1	£21,848
Square Foot Basements Ltd, London, Greater London, NW1	£21,848
CMT Ltd, Islington, N1	£21,888
Nucleus Design Studio, London, N7	£21,944

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Flat roof extension cost in N1c

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Flat roof extension cost in N1c

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