Cost to build a flat roof extension in CM23

Extend your CM23 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 CM23?

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Flat roof extension cost in CM23
Build a flat roof extension cost in CM23
Estimates for common extension builder jobs in CM23;

Flat roof extension cost in CM23

A flat roof extension ranges from the cheapest of £20,800 (V S M Property Services Ltd based in CM23) to the dearest of £24,480 (Essex loft extensions Ltd based in CM20), 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 CM23 by posting a job with HaMuch. We'll send it to extension builders in CM23.

Estimates for build a flat roof extension near CM23

Estimates for common extension builder jobs in CM23;

Rates for other CM23 trades

Build a flat roof extension cost in CM23

Estimate Build a flat roof extension cost in CM23 based on hourly/daily rate (excluding VAT or callout charges)
Business name	Build a flat roof extension cost
D C Salsbury Builders, Bishop's Stortford, CM23	£21,872
Linear Carpentry and Building, Hertfordshire, CM23	£21,936
Wade developments, Hertfordshire, Cm23	£21,944
V S M Property Services Ltd, Bishop's Stortford, CM23	£20,800
Stewart & Sons Ltd., Essex, CM24	£21,944
Ratcliff & Burridge Construction Ltd, Unit 2, Cannons Yard, Bedlars Green, BISHOP'S STORTFORD, Hertfordshire, CM22	£21,872
JKL Construction & Carpentry Ltd, Stansted, CM24	£21,888
Prestige Construction & Building Services Limited, Hertfordshire, CM21	£21,912
EA Assets, Essex, Cm22	£21,944
LAMKIN BUILDERS LIMITED, Much Hadham, SG10	£21,856
Right Renovations Limited, 18 Garnetts, Takeley, Bishop Stortford, , CM22	£21,896
ARC Construction (Essex) LTD, Essex, Cm22	£21,928
SJW Design & Build LTD, Hertfordshire, SG12	£21,928
SJW Design & Build LTD, 1 Daintrees, Widford, Ware, Hertfordshire, SG12	£21,824
RICHARD MORRIS (CONSTRUCTION), Harlow, CM20	£21,848
Reid James Ltd, Herts, SG11	£22,008
Loft in Space London, Harlow, CM17	£21,872
1st Look Roofing, Great dunmow , CM6	£21,904
Enko Building Services LTD, Essex, CM20	£21,920
Mmaes Limited, Essex, CM20	£21,920
LTM Construction, Standon, SG11	£21,968
Welstrong Construction, Essex, CM20	£21,920
Urban lofts and extensions ltd, Harlow, Essex, cm20	£21,824
Added Space Ltd, Essex, CM20	£21,920
Essex loft extensions Ltd , Harlow, CM20	£24,480

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Location in UK	Hourly Rate	Daily Rate
Build A Flat Roof Extension near Bishop's Stortford	£36	£229
Build A Flat Roof Extension near Harlow	£37	£247
Build A Flat Roof Extension near Ware	£40	£252
Build A Flat Roof Extension near East Hertfordshire	£37	£241
Build A Flat Roof Extension near Hoddesdon	£40	£252
Build A Flat Roof Extension near Hertford	£39	£247
Build A Flat Roof Extension near Cheshunt	£41	£245
Build A Flat Roof Extension near Stevenage	£37	£239
Build A Flat Roof Extension near Welwyn Garden City	£36	£229
Build A Flat Roof Extension near Epping Forest	£38	£237

	Job	Estimate
	Cost to underpin a house	£17,465
	Build a two storey extension	£87,948
	Cost to build a timber frame extension	£25,965
	Cost to build a swimming pool	£80,965
	Cost to build a single storey extension	£54,302
	Cost to build a side return extension	£41,108
	Cost to Install an RSJ	£2,165
	Build an outbuilding	£9,965
	Cost to build a mansard loft conversion	£51,965
	Cost of a loft conversion	£33,423
	Cost to build a kitchen extension	£41,965
	Build a hip to gable loft conversion	£41,965
	Build a granny annexe	£86,965
	Build a garden office	£9,965
	Cost of a garage conversion	£15,965
	Build a new garage	£18,465
	Cost to build a flat roof extension	£21,965
	Cost to build a dormer loft conversion	£41,965
	Lay a concrete foundation	£6,215
	Cost of a bungalow loft conversion	£28,965
	Basement conversion cost	£37,108