Cost to build a flat roof extension in BT74

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Extend your BT74 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 BT74?

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Build a flat roof extension cost in BT74

Flat roof extension cost in BT74

Estimates for build a flat roof extension near BT74

A flat roof extension ranges from the cheapest of £21,408 (NG Builders based in BT78) to the dearest of £21,408 (NG Builders based in BT78), 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 BT74 by posting a job with HaMuch. We'll send it to extension builders in BT74.

Estimates for common extension builder jobs in BT74;

Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building

Underpin a building - £16,908

Two storey extension

Two storey extension - £87,112

Build a timber frame extension

Build a timber frame extension - £25,408

Build a swimming pool

Build a swimming pool - £80,408

Single storey extension

Single storey extension - £43,160

Side return extension

Side return extension - £34,840

Install an RSJ

Install an RSJ - £1,608

Outbuilding

Outbuilding - £9,408

Build a Mansard loft conversion

Build a Mansard loft conversion - £51,408

Loft conversion

Loft conversion - £28,200

Build a kitchen extension

Build a kitchen extension - £41,408

Hip to gable loft conversion

Hip to gable loft conversion - £41,408

Granny annexe

Granny annexe - £86,408

Garden office

Garden office - £9,408

Convert a Garage

Convert a Garage - £15,408

Garage

Garage - £17,908

Build a flat roof extension

Build a flat roof extension - £21,408

Build a dormer loft conversion

Build a dormer loft conversion - £41,408

Concrete foundations

Concrete foundations - £5,658

Convert a bungalow loft

Convert a bungalow loft - £28,408

Convert a basement

Convert a basement - £30,840

More extensions & conversions cost guides...