Cost to build a flat roof extension in AL2

Extend your AL2 with an extension

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 AL2?

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Flat roof extension cost in AL2
Build a flat roof extension cost in AL2
Estimates for common extension builder jobs in AL2;

Flat roof extension cost in AL2

A flat roof extension ranges from the cheapest of £21,240 (Apollo Decor Ltd based in AL2) to the dearest of £22,400 (Eeoc based in WD25), 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 AL2 by posting a job with HaMuch. We'll send it to extension builders in AL2.

Estimates for build a flat roof extension near AL2

Estimates for common extension builder jobs in AL2;

Rates for other AL2 trades

Build a flat roof extension cost in AL2

Estimate Build a flat roof extension cost in AL2 based on hourly/daily rate (excluding VAT or callout charges)
Business name	Build a flat roof extension cost
Apollo Decor Ltd, St Albans, AL2	£21,240
DK Home Refurbishment Limited, St. albans, AL1	£21,896
P & A Doherty, 23 Pemberton Close, St Albans, Hertfords, AL1	£21,840
Property Interior Services, St. Albans, AL1	£21,960
Luna Construction Ltd, Hertfordshire, al2	£21,968
EMA Contractors, Hertfordshire, AL2	£21,968
Beswick Building and Renovations LTD, Saint Albans, Hertfordshire, al1	£21,848
ADS Builders, Radlett, WD7	£21,848
JGS Building Ltd, Hertfordshire, AL1	£21,968
JAS Housing Developments, St Albans, St Albans, Hertfordshire, AL1	£21,848
A.MILLS BUILDING SOLUTIONS LTD, Sandridge, AL4	£21,888
Planson’s Building Services, Hertfordshire , AL1	£22,000
Designer Shade Solutions, Hertfordshire, AL1	£21,968
IC Builders, Hertfordshire, AL1	£21,968
Griggs Homes, 13 Beaumont gate, Radlett, wd7	£21,856
ARI Studio LTD, 7 Bridge Court, Craigmount, Radlett, Her, WD7	£21,856
Ebro Construction Group, St Albans, Hertfordshire, AL4	£21,848
RenoSpace, Hertfordshire, AL3	£21,968
J Pellow & Son Ltd, Watford, WD25	£21,856
Eeoc , Watford , WD25	£22,400
Rob Higgs Building & Carpentry, Hertfordshire, WD5	£21,968
Abalon Construction , Edmonton, ZZ99	£21,928
Mayfield Building Contractor, Hertfordshire, AL3	£21,968
Crown Building, Unit: 324-B, Wenta Centre, Colne Way, Watford, Hertfordshire, WD24	£21,864
Murati Building LTD, Garston, WD25	£21,904

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Location in UK	Hourly Rate	Daily Rate
Build A Flat Roof Extension near St Albans	£52	£246
Build A Flat Roof Extension near Borehamwood	£37	£238
Build A Flat Roof Extension near Bushey	£37	£240
Build A Flat Roof Extension near Hatfield	£53	£244
Build A Flat Roof Extension near Watford	£37	£239
Build A Flat Roof Extension near Harpenden	£70	£264
Build A Flat Roof Extension near Potters Bar	£38	£240
Build A Flat Roof Extension near Hemel Hempstead	£36	£232
Build A Flat Roof Extension near Dacorum	£36	£232
Build A Flat Roof Extension near High Barnet	£37	£236

	Job	Estimate
	Cost to underpin a house	£17,405
	Build a two storey extension	£87,857
	Cost to build a timber frame extension	£25,905
	Cost to build a swimming pool	£80,905
	Cost to build a single storey extension	£53,099
	Cost to build a side return extension	£40,431
	Cost to Install an RSJ	£2,105
	Build an outbuilding	£9,905
	Cost to build a mansard loft conversion	£51,905
	Cost of a loft conversion	£32,859
	Cost to build a kitchen extension	£41,905
	Build a hip to gable loft conversion	£41,905
	Build a granny annexe	£86,905
	Build a garden office	£9,905
	Cost of a garage conversion	£15,905
	Build a new garage	£18,405
	Cost to build a flat roof extension	£21,905
	Cost to build a dormer loft conversion	£41,905
	Lay a concrete foundation	£6,155
	Cost of a bungalow loft conversion	£28,905
	Basement conversion cost	£36,431