Extend your OX7 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 OX7?

Build a flat roof extension cost in OX7 - Sort by rates or availability

Lambert Home Builds

From £21,984

(last active 27/09/26)

Location

Oxford, OX2

Lambert Home Builds is a trusted extension builder serving customers in OX7 and the surrounding area. Contact us to today to get a competitive quot...

HH Projects and Services

From £22,192

(last active 27/09/26)

Location

Oxford, OX3

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

DRC Construction

From £22,216

(last active 04/09/26)

Location

Abingdon, OX14

Experienced extension builder ready to quote for your work. DRC Construction is the best extension builder in OX7. No obligation free quotes and ma...

BA Knott Oxford Ltd

From £22,216

(last active 04/09/26)

Location

Oxford, OX4

Need to find an Extension Builder near you for all your extension buildering work?

BA Knott Oxford Ltd provides a local, trusted extension ...

CEDAR INTERIORS LIMITED

From £21,832

(last active 11/08/26)

Location

Banbury, OX16

CEDAR INTERIORS LIMITED are here to help customers who need an Extension Builder in OX7. We offer a competitive rate to complete all your extension...

APH Construction Limited

From £22,240

(last active 24/07/26)

Location

Botley, OX2

Approved extension builder in OX7, covering 20 miles.

Whatever extension buildering work you need, including emergency repairs, hire a compe...

Michael E Phillips

From £22,512

(last active 01/07/26)

Location

Oxford, OX2

Michael E Phillips is an established extension buildering business in OX7. We come highly recommended and provide competitive quotes for your work....

A C SPENCER BUILDERS

From £22,032

(last active 12/06/26)

Location

Middleton Cheney, OX17

Need an Extension Builder in OX7? A C SPENCER BUILDERS has been helping local clients (20 mile radius) with their extension buildering jobs for man...

Singh Builders

From £22,168

(last active 05/06/26)

Location

Marston, OX3

Singh Builders is an established extension buildering business in OX7. We come highly recommended and provide competitive quotes for your work.

...

K C CONSTRUCTION

From £22,224

(last active 05/06/26)

Location

Botley, OX2

Need an Extension Builder in OX7? K C CONSTRUCTION has been helping local clients (20 mile radius) with their extension buildering jobs for many ye...

Flat roof extension cost in OX7

Estimates for build a flat roof extension near OX7

A flat roof extension ranges from the cheapest of £21,832 (CEDAR INTERIORS LIMITED based in OX16) to the dearest of £22,512 (Michael E Phillips based in OX2), 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 OX7 by posting a job with HaMuch. We'll send it to extension builders in OX7.


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 Witney£32£244
Build A Flat Roof Extension near Banbury£33£239
Build A Flat Roof Extension near Cherwell£35£249
Build A Flat Roof Extension near Oxford£37£261
Build A Flat Roof Extension near Bicester£35£249
Build A Flat Roof Extension near Vale of White Horse£36£271
Build A Flat Roof Extension near Abingdon-on-Thames£35£258
Build A Flat Roof Extension near Stratford-upon-Avon£27£215
Build A Flat Roof Extension near Stratford-on-Avon£27£215
Build A Flat Roof Extension near Evesham£35£264

Estimates for common extension builder jobs in OX7;

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 - £17,662

Two storey extension

Two storey extension - £88,242

Build a timber frame extension

Build a timber frame extension - £26,162

Build a swimming pool

Build a swimming pool - £81,162

Single storey extension

Single storey extension - £58,232

Side return extension

Side return extension - £43,318

Install an RSJ

Install an RSJ - £2,362

Outbuilding

Outbuilding - £10,162

Build a Mansard loft conversion

Build a Mansard loft conversion - £52,162

Loft conversion

Loft conversion - £35,265

Build a kitchen extension

Build a kitchen extension - £42,162

Hip to gable loft conversion

Hip to gable loft conversion - £42,162

Granny annexe

Granny annexe - £87,162

Garden office

Garden office - £10,162

Convert a Garage

Convert a Garage - £16,162

Garage

Garage - £18,662

Build a flat roof extension

Build a flat roof extension - £22,162

Build a dormer loft conversion

Build a dormer loft conversion - £42,162

Concrete foundations

Concrete foundations - £6,412

Convert a bungalow loft

Convert a bungalow loft - £29,162

Convert a basement

Convert a basement - £39,318

More extensions & conversions cost guides...