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 £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 £86,552
Ted Smith
Qualified stonerestorer 35years experience own public liability insurance.
Worked on numerous listedbuilding through out &nb...
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 £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 £86,856
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...

Building a granny annexe ranges from £86,552 (T.S Stone Restoration based in CO16) 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 | £230 |
| Granny Annexe near Colchester | £34 | £232 |
| 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 - £17,400

Two storey extension - £87,849

Build a timber frame extension - £25,900

Build a swimming pool - £80,900

Single storey extension - £52,991

Side return extension - £40,370

Install an RSJ - £2,100

Outbuilding - £9,900

Build a Mansard loft conversion - £51,900

Loft conversion - £32,808

Build a kitchen extension - £41,900

Hip to gable loft conversion - £41,900

Granny annexe - £86,900

Garden office - £9,900

Convert a Garage - £15,900

Garage - £18,400

Build a flat roof extension - £21,900

Build a dormer loft conversion - £41,900

Concrete foundations - £6,150

Convert a bungalow loft - £28,900

Convert a basement - £36,370