Cost to build a flat roof extension in WD19

Flat roof extension cost in WD19

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 WD19?

A flat roof extension ranges from the cheapest of £20,040 (Adams Build and Design LTD. based in Ha6) to the dearest of £24,000 (Design & Build Builders Ltd based in WD18), 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 WD19 by posting a job with HaMuch. We'll send it to extension builders in WD19.

Estimates for flat roof extension near WD19

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
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What insulation do I need for a flat roof extension?

	Job	Estimate
	Underpinning a house	£17,422
	Build a two storey extension	£87,882
	Build a timber frame extension	£25,922
	Install a swimming pool	£80,922
	Cost to build a single storey extension	£53,432
	Cost to build a side return extension	£40,618
	Install an RSJ	£2,122
	Build an outbuilding	£9,922
	Build a mansard loft conversion	£51,922
	Cost of a loft conversion	£33,015
	Build a kitchen extension	£41,922
	Build a hip to gable loft conversion	£41,922
	Build a granny annexe	£86,922
	Build a garden office	£9,922
	Convert a garage	£15,922
	Build a new garage	£18,422
	Build a flat roof extension	£21,922
	Build a dormer loft conversion	£41,922
	Lay a concrete foundation	£6,172
	Convert a bungalow loft	£28,922
	Basement conversion cost	£36,618

Business name	Flat roof extension cost
Cannon Build Solutions, Hartsbourne House, Watford, Hertfordshire, WD19	£21,872
C S C BUILDINGS LTD, Oxhey, WD19	£21,888
Ideal Place Construction Ltd, Watford, WD19	£22,000
Sharp Building Ltd, Watford, WD19	£21,896
Architectural Brickwork Services, Hertfordshire, WD19	£21,968
AV Home Improvements, Herts, WD19	£21,968
Design & Build Builders Ltd, Watford, WD18	£24,000
Frame Brickwork, West Watford, WD18	£21,896
S2M VENTURES LLP, West Lothian, HA6	£21,968
1st Choice Builders UK, West Watford, WD18	£21,896
Project Squared Construction Ltd, Hertfordshire, ha6	£21,968
T N Roofing, Bushey Hall Drive, B, WD23	£21,888
Daniel London, London, Greater London, HA6	£21,872
AVENUE BUILDERS, Bushey Heath, WD23	£21,888
A&T Building, Watford, WD18	£21,888
Adams Build and Design LTD., Greater London, Ha6	£20,040
Active Property Solutions, Greater London, WD23	£21,968
Active Property Solutions, London, Greater London, WD23	£21,872
Ionesi Builders in Harrow, Harrow, HA3	£21,896
Primrose Projects, WATFORD, Hertfordshire, WD17	£21,864
Coste + Beno Ltd, Greater London, HA6	£21,968
Coste + Beno Ltd, 20 Leaf Close,, Northwood,, London, Greater London, HA6	£21,864
MJR Construction Ltd, Hertfordshire, WD23	£21,968
Excelsior Construction Ltd, Pinner, HA5	£21,888
GRAPHENE, London, Greater London, HA5	£21,856

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Flat roof extension cost in WD19

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Flat roof extension cost in WD19

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