Extend your NR9 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 NR9?

Build a flat roof extension cost in NR9 - Sort by rates or availability

Donris Limited

From £21,640

(last active 02/10/26)

Location

Norwich, NR7

Donris Limited are here to help customers who need an Extension Builder in NR9. We offer a competitive rate to complete all your extension builderi...

Heritage Construction Norfolk

From £21,472

(last active 02/10/26)

Location

Norwich, NR8

Need an Extension Builder in NR9? Heritage Construction Norfolk has been helping local clients (20 mile radius) with their extension buildering job...

Steven Folkard (Self Build)

From £21,552

(last active 02/10/26)

Location

Hevingham, NR10

Relax... you have found a reliable extension builder in NR9. Steven Folkard (Self Build) is a friendly and reliable company based in NR9 who consid...

1st Class Building Services

From £21,600

(last active 02/10/26)

Location

Old Catton, NR6

Relax... you have found a reliable extension builder in NR9. 1st Class Building Services is a friendly and reliable company based in NR9 who consid...

Inspired Building Services Ltd

From £21,688

(last active 17/09/26)

Location

Norwich, NR16

Land lord

From £21,568

(last active 11/09/26)

Location

Norwich, NR2

Land lord are here to help customers who need an Extension Builder in NR9. We offer a competitive rate to complete all your extension buildering jo...

Combined Building Services

From £21,664

(last active 10/09/26)

Location

Norfolk, NR6

This business has not added a description yet.

J Kimbley Building & Landscaping

From £21,456

(last active 20/08/26)

Location

Eaton, NR2

Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Bespoke Build Solutions

From £21,480

(last active 29/07/26)

Location

Norwich, NR7

Need an Extension Builder in NR9? Bespoke Build Solutions has been helping local clients (20 mile radius) with their extension buildering jobs for ...

G & F Property Maintenance

From £21,544

(last active 21/05/26)

Location

Norwich, NR1

Experienced extension builder ready to quote for your work. G & F Property Maintenance is the best extension builder in NR9. No obligation free quo...

Flat roof extension cost in NR9

Estimates for build a flat roof extension near NR9

A flat roof extension ranges from the cheapest of £21,456 (J Kimbley Building & Landscaping based in NR2) to the dearest of £21,688 (Inspired Building Services Ltd based in NR16), 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 NR9 by posting a job with HaMuch. We'll send it to extension builders in NR9.


Get extension builder rates instantly

Get extension builder rates instantly (excluding VAT or callout charges)
Location in UKHourly RateDaily Rate
Build A Flat Roof Extension near Norwich£25£200
Build A Flat Roof Extension near Dereham£25£203
Build A Flat Roof Extension near Broadland£24£194
Build A Flat Roof Extension near Breckland£28£248
Build A Flat Roof Extension near Thetford£42£277
Build A Flat Roof Extension near Great Yarmouth£13£132
Build A Flat Roof Extension near Gorleston-on-Sea£25£205
Build A Flat Roof Extension near Waveney£24£200
Build A Flat Roof Extension near Kings Lynn & West Norfolk£31£238
Build A Flat Roof Extension near Lowestoft£24£197

Estimates for common extension builder jobs in NR9;

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 - £17,066

Two storey extension

Two storey extension - £87,350

Build a timber frame extension

Build a timber frame extension - £25,566

Build a swimming pool

Build a swimming pool - £80,566

Single storey extension

Single storey extension - £46,328

Side return extension

Side return extension - £36,622

Install an RSJ

Install an RSJ - £1,766

Outbuilding

Outbuilding - £9,566

Build a Mansard loft conversion

Build a Mansard loft conversion - £51,566

Loft conversion

Loft conversion - £29,685

Build a kitchen extension

Build a kitchen extension - £41,566

Hip to gable loft conversion

Hip to gable loft conversion - £41,566

Granny annexe

Granny annexe - £86,566

Garden office

Garden office - £9,566

Convert a Garage

Convert a Garage - £15,566

Garage

Garage - £18,066

Build a flat roof extension

Build a flat roof extension - £21,566

Build a dormer loft conversion

Build a dormer loft conversion - £41,566

Concrete foundations

Concrete foundations - £5,816

Convert a bungalow loft

Convert a bungalow loft - £28,566

Convert a basement

Convert a basement - £32,622

More extensions & conversions cost guides...