From £87,144
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 £86,928
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 £87,056
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 £86,552
Qualified stonerestorer 35years experience own public liability insurance.
Worked on numerous listedbuilding through out &nb...
From £86,672
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 £86,856
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 £86,976
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 £86,800
Trusted and professional extension builder in Harwich. Experienced in all extension buildering work and keeping within budget and on quote. James F...
From £87,112
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 £86,296
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...

Building a granny annexe ranges from £86,296 (Caley & Son based in IP3) to £87,144 (Edwin Lewis Dickinson Ltd based in CO12), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in Harwich by posting a job with HaMuch. We will send it to extension builders in Harwich who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Harwich | £34 | £248 |
| Granny Annexe near Felixstowe | £31 | £231 |
| Granny Annexe near Tendring | £31 | £226 |
| Granny Annexe near Ipswich | £33 | £235 |
| Granny Annexe near Clacton-on-Sea | £31 | £232 |
| Granny Annexe near Colchester | £33 | £230 |
| Granny Annexe near Suffolk Coastal | £28 | £215 |
| Granny Annexe near Stowmarket | £30 | £221 |
| Granny Annexe near Sudbury | £34 | £229 |
| Granny Annexe 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