From £17,644
Edwin Lewis Dickinson is a well established company providing all of its customers with the very highest quality of workmanship using only the best...
From £17,428
Our company is built on trust and communication with our clients.We are of firm belief that our customers needs are of the utmost importance.
From £17,556
Relax... you have found a reliable extension builder in Harwich. AP Laflin Builders Ltd is a friendly and reliable company based in Harwich who con...
From £17,052
Qualified stonerestorer 35years experience own public liability insurance.
Worked on numerous listedbuilding through out &nb...
From £17,172
Experienced extension builder ready to quote for your work. A M F BUILDING CONTRACTOR is the best extension builder in Harwich. No obligation free ...
From £17,356
From Grandfather to Grandson, we have a combined experience of over 40 years within the construction industry providing a wide range of building se...
From £17,476
Greyline Interiors is a family run home refurbishment business with an eye for the latest trends and traditional values.We strive for quality, valu...
From £17,300
Trusted and professional extension builder in Harwich. Experienced in all extension buildering work and keeping within budget and on quote. James F...
From £17,612
San Diego Construction Custom Homes has experience building homes in the UK, Canada and the United States since 1999. It was founded on quality and...
From £16,796
Caley & Son are here to help customers who need an Extension Builder in Harwich. We offer a competitive rate to complete all your extension builder...

Underpinning ranges from £16,796 (Caley & Son based in IP3) to £17,644 (Edwin Lewis Dickinson Ltd based in CO12), but the final cost will depend on the method of underpinning used, how much of your foundations need underpinning and where you live.
Comparing extension builders estimates for underpinning gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
Get quotes to underpin your home in Harwich by posting a job with HaMuch and we will send it to extension builders in Harwich.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Underpin A Building near Harwich | £34 | £248 |
| Underpin A Building near Felixstowe | £31 | £231 |
| Underpin A Building near Tendring | £31 | £226 |
| Underpin A Building near Ipswich | £33 | £235 |
| Underpin A Building near Clacton-on-Sea | £31 | £232 |
| Underpin A Building near Colchester | £33 | £230 |
| Underpin A Building near Suffolk Coastal | £28 | £215 |
| Underpin A Building near Stowmarket | £30 | £221 |
| Underpin A Building near Sudbury | £34 | £229 |
| Underpin A Building near Maldon | £36 | £244 |
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 - £17,339

Two storey extension - £87,759

Build a timber frame extension - £25,839

Build a swimming pool - £80,839

Single storey extension - £51,784

Side return extension - £39,691

Install an RSJ - £2,039

Outbuilding - £9,839

Build a Mansard loft conversion - £51,839

Loft conversion - £32,243

Build a kitchen extension - £41,839

Hip to gable loft conversion - £41,839

Granny annexe - £86,839

Garden office - £9,839

Convert a Garage - £15,839

Garage - £18,339

Build a flat roof extension - £21,839

Build a dormer loft conversion - £41,839

Concrete foundations - £6,089

Convert a bungalow loft - £28,839

Convert a basement - £35,691