Extend your Storrington 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 Storrington?

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

Main Construction

From £22,440

(last active 01/10/26)

Location

Worthing, BN12

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

Main Construction provides a local, trusted extension bu...

Whites Carpentry & Building

From £22,008

(last active 01/10/26)

Location

Chichester, PO19

Whites Carpentry & Building prides in delivering an excellent extension buildering service and value for money in Storrington and the surrounding a...

MPS Home Improvements Ltd

From £21,872

(last active 29/09/26)

Location

Billingshurst, RH14

Need an Extension Builder in Storrington? MPS Home Improvements Ltd has been helping local clients (20 mile radius) with their extension buildering...

H P Building Services Sussex

From £21,992

Member since August 2026

Location

Lancing, BN15

H P Building Services Sussex is a one-stop solution for all your extension buildering needs. Establish over 10 years ago and covering 20 miles arou...

R S Construction (Surrey)

From £22,168

(last active 22/09/26)

Location

Witley, GU8

R S Construction (Surrey) is an established extension buildering business in Storrington. We come highly recommended and provide competitive quotes...

Shercoriana London Ltd

From £22,032

(last active 22/09/26)

Location

Crawley, RH11

We are a family run business we 40 years experience delivering multiple projects from new developments . Extension. Loft conversion. Including foun...

Futureways Design and Build

From £22,112

(last active 19/09/26)

Location

, BN18

Futureways Design and Build are here to help customers who need an Extension Builder in Storrington. We offer a competitive rate to complete all yo...

Alan Pacy Builder

From £22,200

(last active 18/09/26)

Location

Worth, BN12

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

GD Project Management Ltd

From £22,376

(last active 18/09/26)

Location

West Sussex, GU29

Giles Dixon is an experienced Project Manager with over 30 years experience, having worked from the ground up starting in 1984 as an apprentice ele...

Regent Property Holdings Ltd

From £22,128

(last active 18/09/26)

Location

West Sussex, PO21

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

Flat roof extension cost in Storrington

Estimates for build a flat roof extension near Storrington

A flat roof extension ranges from the cheapest of £21,872 (MPS Home Improvements Ltd based in RH14) to the dearest of £22,440 (Main Construction based in BN12), 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 Storrington by posting a job with HaMuch. We'll send it to extension builders in Storrington.


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 Rustington£36£246
Build A Flat Roof Extension near Littlehampton£35£244
Build A Flat Roof Extension near Arun£35£241
Build A Flat Roof Extension near Worthing£35£251
Build A Flat Roof Extension near Lancing£37£251
Build A Flat Roof Extension near Horsham£38£265
Build A Flat Roof Extension near Shoreham-by-Sea£36£250
Build A Flat Roof Extension near Bognor Regis£35£247
Build A Flat Roof Extension near Burgess Hill£36£240
Build A Flat Roof Extension near Chichester£34£242

Estimates for common extension builder jobs in Storrington;

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 - £17,633

Two storey extension

Two storey extension - £88,199

Build a timber frame extension

Build a timber frame extension - £26,133

Build a swimming pool

Build a swimming pool - £81,133

Single storey extension

Single storey extension - £57,656

Side return extension

Side return extension - £42,994

Install an RSJ

Install an RSJ - £2,333

Outbuilding

Outbuilding - £10,133

Build a Mansard loft conversion

Build a Mansard loft conversion - £52,133

Loft conversion

Loft conversion - £34,995

Build a kitchen extension

Build a kitchen extension - £42,133

Hip to gable loft conversion

Hip to gable loft conversion - £42,133

Granny annexe

Granny annexe - £87,133

Garden office

Garden office - £10,133

Convert a Garage

Convert a Garage - £16,133

Garage

Garage - £18,633

Build a flat roof extension

Build a flat roof extension - £22,133

Build a dormer loft conversion

Build a dormer loft conversion - £42,133

Concrete foundations

Concrete foundations - £6,383

Convert a bungalow loft

Convert a bungalow loft - £29,133

Convert a basement

Convert a basement - £38,994

More extensions & conversions cost guides...