Cost to build a flat roof extension in N18

Flat roof extension cost in N18

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 N18?

A flat roof extension ranges from the cheapest of £21,832 (Multiarch Building Services Ltd based in N13) to the dearest of £21,944 (R&S services Ltd based in N17), 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 N18 by posting a job with HaMuch. We'll send it to extension builders in N18.

Estimates for flat roof extension near N18

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	£17,381
	Build a two storey extension	£87,822
	Build a timber frame extension	£25,881
	Install a swimming pool	£80,881
	Cost to build a single storey extension	£52,626
	Cost to build a side return extension	£40,164
	Install an RSJ	£2,081
	Build an outbuilding	£9,881
	Build a mansard loft conversion	£51,881
	Cost of a loft conversion	£32,637
	Build a kitchen extension	£41,881
	Build a hip to gable loft conversion	£41,881
	Build a granny annexe	£86,881
	Build a garden office	£9,881
	Convert a garage	£15,881
	Build a new garage	£18,381
	Build a flat roof extension	£21,881
	Build a dormer loft conversion	£41,881
	Lay a concrete foundation	£6,131
	Convert a bungalow loft	£28,881
	Basement conversion cost	£36,164

Business name	Flat roof extension cost
Best Builders, Upper Edmonton, N18	£21,856
Builderstimes, Upper Edmonton, N18	£21,880
PS Contractors, Unit 4a, Triumph Trading Estate, London, Greater London, N17	£21,840
Kuboid Home Extensions, Tottenham, N17	£21,856
Eckford Chong Design, London, Greater London, N18	£21,840
JMP Contractors & Engineers, 12A Baronet Grove, London, Greater London, N17	£21,848
R&S services Ltd, Londonderry, N17	£21,944
Concept Design Builders, London, Greater London, N17	£21,848
Abarth Construction Ltd, Greater London, N18	£21,944
By Design London Ltd, 37 Queensland Av, London, Greater London, N18	£21,848
Demo Art Ltd, Tottenham, N17	£21,880
Commissioned by you LLP, Building Bloqs, Unit 4, London, Greater London, N18	£21,840
Top Class Roofing & Guttering Services, London, N17	£21,888
Douglas & Davis Consultant Ltd, Tottenham, N17	£21,880
Nicky Price, Greater London, N17	£21,944
Coss Construction Ltd, London, Greater London, N9	£21,840
B&H Design Construction LTD, Greater London, N17	£21,944
Multiarch Building Services Ltd, London, N13	£21,832
Rockland Building Services Ltd, Greater London, E17	£21,944
MSN Pyramid Construction Ltd, Tottenham, N17	£21,888
PonariBuilders Ltd, Greater London, n13	£21,944
M & A Builders Ltd, Palmers Green, N13	£21,888
GG CONSTRUCTION LTD, Tottenham, N17	£21,864
Azzep Building Services, Seven Sisters, N15	£21,888
MEGABUILD LTD, Walthamstow, E17	£21,864

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Flat roof extension cost in N18

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Flat roof extension cost in N18

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