Cost to build a flat roof extension in WD25

Flat roof extension cost in WD25

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 WD25?

A flat roof extension ranges from the cheapest of £21,240 (Apollo Decor Ltd based in AL2) 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 WD25 by posting a job with HaMuch. We'll send it to extension builders in WD25.

Estimates for flat roof extension near WD25

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?
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Can you walk on a flat roof extension?
What insulation do I need for a flat roof extension?

	Job	Estimate
	Underpinning a house	£17,478
	Build a two storey extension	£87,966
	Build a timber frame extension	£25,978
	Install a swimming pool	£80,978
	Cost to build a single storey extension	£54,552
	Cost to build a side return extension	£41,248
	Install an RSJ	£2,178
	Build an outbuilding	£9,978
	Build a mansard loft conversion	£51,978
	Cost of a loft conversion	£33,540
	Build a kitchen extension	£41,978
	Build a hip to gable loft conversion	£41,978
	Build a granny annexe	£86,978
	Build a garden office	£9,978
	Convert a garage	£15,978
	Build a new garage	£18,478
	Build a flat roof extension	£21,978
	Build a dormer loft conversion	£41,978
	Lay a concrete foundation	£6,228
	Convert a bungalow loft	£28,978
	Basement conversion cost	£37,248

Business name	Flat roof extension cost
Eeoc , Watford , WD25	£22,400
Crown Building, Unit: 324-B, Wenta Centre, Colne Way, Watford, Hertfordshire, WD24	£21,864
J Pellow & Son Ltd, Watford, WD25	£21,856
Wolf & Brown Limited, 18 Coates Way, Watford, Hertfordshire, WD25	£21,848
Conversion Property and Electrical Services, Hertfordshire, WD24	£21,968
Progressive Design London, Watford, Hertfordshire, WD24	£21,856
Primrose Projects, WATFORD, Hertfordshire, WD17	£21,864
Tonybuild, Watford, WD17	£21,896
EMA Contractors, Hertfordshire, AL2	£21,968
PM HOBBS BUILDING SERVICES, Abbots Langley, WD5	£21,896
T N Roofing, Bushey Hall Drive, B, WD23	£21,888
1st Choice Builders UK, West Watford, WD18	£21,896
A&T Building, Watford, WD18	£21,888
Rob Higgs Building & Carpentry, Hertfordshire, WD5	£21,968
Architectural Brickwork Services, Hertfordshire, WD19	£21,968
Frame Brickwork, West Watford, WD18	£21,896
Design & Build Builders Ltd, Watford, WD18	£24,000
Griggs Homes, 13 Beaumont gate, Radlett, wd7	£21,856
Apollo Decor Ltd, St Albans, AL2	£21,240
ARI Studio LTD, 7 Bridge Court, Craigmount, Radlett, Her, WD7	£21,856
AVENUE BUILDERS, Bushey Heath, WD23	£21,888
Total Refurbishment & Build, Kings Langley, WD4	£21,896
M DUNNE BUILDER, Kings Langley, WD4	£21,888
Evolved Glazing Solutions Limited, Hemel Hempstead, HP3	£22,000
D ROSE BUILDING SERVICES, Rickmansworth, WD3	£21,896

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Flat roof extension cost in WD25

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Flat roof extension cost in WD25

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