Extend your Grange-over-sands 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 Grange-over-sands?

Build a flat roof extension cost in Grange-over-sands - Sort by rates or availability

L J G CONTRACTING

From £21,760

(last active 08/09/26)

Location

Morecambe, LA4

Attention to detail.  Member of safe trader. Recommendations References available. 

CORKHILL CONSTRUCTION

From £21,712

(last active 27/08/26)

Location

Barrow-in-Furness, LA14

Trusted and professional extension builder in Grange-over-sands. Experienced in all extension buildering work and keeping within budget and on quot...

LAKELAND DESIGN & BUILD LTD

From £21,896

(last active 27/08/26)

Location

Lancaster, LA1

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

Owen Williamson

From £21,392

(last active 27/08/26)

Location

Barrow In furness, LA14

Self employed and am good at what I do 40 yrs experience

ADAM READ TRADITIONAL BUILDING

From £21,496

(last active 27/08/26)

Location

Millom, LA18

ADAM READ TRADITIONAL BUILDING is an established and experienced local extension builder in Grange-over-sands. Please contact us for a free, no obl...

J.MACKIE (BUILDER)

From £21,560

(last active 27/08/26)

Location

Millom, LA18

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

Lancaster Building Contractors

From £21,600

(last active 27/08/26)

Location

Lancaster, LA1

Lancaster Building Contractors is an established and experienced local extension builder in Grange-over-sands. Please contact us for a free, no obl...

Absolute Build

From £21,888

(last active 20/08/26)

Location

Kendal, LA9

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

Absolute Build provides a local, trusted extension build...

J.DRING BUILDING

From £21,736

(last active 17/08/26)

Location

Lancaster, LA1

J.DRING BUILDING are here to help customers who need an Extension Builder in Grange-over-sands. We offer a competitive rate to complete all your ex...

JPw Property Care LTD

From £21,920

(last active 17/08/26)

Location

Lancashire, LA4

We are a family business for 37 years experience between us reliable Team value for money check out our reviews on Google Rated People bar...

Flat roof extension cost in Grange-over-sands

Estimates for build a flat roof extension near Grange-over-sands

A flat roof extension ranges from the cheapest of £21,392 (Owen Williamson based in LA14) to the dearest of £21,920 (JPw Property Care LTD based in LA4), 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 Grange-over-sands by posting a job with HaMuch. We'll send it to extension builders in Grange-over-sands.


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 Morecambe£25£212
Build A Flat Roof Extension near Kendal£28£236
Build A Flat Roof Extension near Lancaster£25£211
Build A Flat Roof Extension near Barrow-in-Furness£25£204
Build A Flat Roof Extension near Fleetwood£28£206
Build A Flat Roof Extension near Thornton£29£211
Build A Flat Roof Extension near Blackpool£29£209
Build A Flat Roof Extension near Fulwood£31£217
Build A Flat Roof Extension near Whitehaven£22£221
Build A Flat Roof Extension near Nelson£27£214

Estimates for common extension builder jobs in Grange-over-sands;

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 - £17,196

Two storey extension

Two storey extension - £87,544

Build a timber frame extension

Build a timber frame extension - £25,696

Build a swimming pool

Build a swimming pool - £80,696

Single storey extension

Single storey extension - £48,920

Side return extension

Side return extension - £38,080

Install an RSJ

Install an RSJ - £1,896

Outbuilding

Outbuilding - £9,696

Build a Mansard loft conversion

Build a Mansard loft conversion - £51,696

Loft conversion

Loft conversion - £30,900

Build a kitchen extension

Build a kitchen extension - £41,696

Hip to gable loft conversion

Hip to gable loft conversion - £41,696

Granny annexe

Granny annexe - £86,696

Garden office

Garden office - £9,696

Convert a Garage

Convert a Garage - £15,696

Garage

Garage - £18,196

Build a flat roof extension

Build a flat roof extension - £21,696

Build a dormer loft conversion

Build a dormer loft conversion - £41,696

Concrete foundations

Concrete foundations - £5,946

Convert a bungalow loft

Convert a bungalow loft - £28,696

Convert a basement

Convert a basement - £34,080

More extensions & conversions cost guides...