Cost to build a flat roof extension in NW7

Flat roof extension cost in NW7

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 NW7?

A flat roof extension ranges from the cheapest of £21,200 (DBR Construction Ltd based in NW7) to the dearest of £22,400 (KB Construction Ltd based in HA8), 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 NW7 by posting a job with HaMuch. We'll send it to extension builders in NW7.

Estimates for flat roof extension near NW7

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	£17,340
	Build a two storey extension	£87,760
	Build a timber frame extension	£25,840
	Install a swimming pool	£80,840
	Cost to build a single storey extension	£51,794
	Cost to build a side return extension	£39,696
	Install an RSJ	£2,040
	Build an outbuilding	£9,840
	Build a mansard loft conversion	£51,840
	Cost of a loft conversion	£32,247
	Build a kitchen extension	£41,840
	Build a hip to gable loft conversion	£41,840
	Build a granny annexe	£86,840
	Build a garden office	£9,840
	Convert a garage	£15,840
	Build a new garage	£18,340
	Build a flat roof extension	£21,840
	Build a dormer loft conversion	£41,840
	Lay a concrete foundation	£6,090
	Convert a bungalow loft	£28,840
	Basement conversion cost	£35,696

Business name	Flat roof extension cost
RAS Construction & Design Ltd, Hertfordshire, NW7	£21,960
Ask Windows Limited, 145A The Broadway, Mill Hill, London, Gr, NW7	£21,832
MH Costa Construction Ltd, 9 Mill Hill Industrial Estate, Flower Lane, London, Greater London, NW7	£21,856
DBR Construction Ltd, London, NW7	£21,200
NW London Contracts Ltd, Greater London, NW7	£21,960
Simion PC Construction Ltd, Edgware , HA8	£21,440
F C Builders London ltd, Edgware, HA8	£21,600
Coldshield ltd, Greater London, NW7	£21,960
Nisup Building Services, Edgware, HA8	£21,600
Gleam 4 U, Edgware, HA8	£21,872
Alex Interiors Ltd, London, HA8	£21,952
CORTESE CONSTRUCTION, Greater London, NW7	£21,960
Lifestyle D.sign, 374 Watford way,, London, Greater London, NW4	£21,848
Arhiterra Design and Build Ltd, Greater London, NW9	£21,944
A & S Construction Ltd, LONDON, NW9	£21,600
SL Building Constructions, Greater London, NW9	£21,944
TCTServ Ltd, 42 Deans Lane, Edgware, Greater London, HA8	£21,848
Crest Construction and Interiors Ltd, Edgware, HA8	£21,888
AAA Team Building Services Ltd, London, NW9	£21,848
KB Construction Ltd, London, HA8	£22,400
L H Builders, Edgware, HA8	£21,864
ROMEO LEVITCHI GENERAL BUILDER, Edgware, HA8	£21,880
Otters Group Ltd, London, NW9	£21,848
Saha Properties Ltd, Greater London, NW4	£21,944
Carl Construction Limited, London, NW9	£21,944

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Flat roof extension cost in NW7

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Flat roof extension cost in NW7

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