Chelmsford, CM2
Relax... you have found a reliable extension builder in Chelmsford. CWN Developments Ltd is a friendly and reliable company based in Chelmsford who...
Trusted and professional extension builder in Chelmsford. Experienced in all extension buildering work and keeping within budget and on quote. Art ...
Ian Young
Chelmsford, CM1
Mr. is a trusted extension builder serving customers in Chelmsford and the surrounding area. Contact us to today to get a competitive quote for ext...
Relax... you have found a reliable extension builder in Chelmsford. NEVENDON CONSTRUCTION LTD is a friendly and reliable company based in Chelmsfor...
Chelmsford, CM1
Need to find an Extension Builder near you for all your extension buildering work?
Newman Multi Trade Services provides a local, trusted ex...
Martin Womersley Building Services is an established extension buildering business in Chelmsford. We come highly recommended and provide competitiv...
Chelmsford, CM1
Prestige Roofing Contractors Ltd are here to help customers who need an Extension Builder in Chelmsford. We offer a competitive rate to complete al...
Chelmsford, CM1
Storm Roofing Essex are here to help customers who need an Extension Builder in Chelmsford. We offer a competitive rate to complete all your extens...
Mark Scrutton
Mark scrutton is a trusted extension builder serving customers in Chelmsford and the surrounding area. Contact us to today to get a competitive qu...
Billericay Loft Conversions is a trusted extension builder serving customers in Chelmsford and the surrounding area. Contact us to today to get a c...

Building a granny annexe ranges from £86,824 (CWN Developments Ltd based in CM2) to £87,360 (Mr. based in CM1), 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 Chelmsford by posting a job with HaMuch. We will send it to extension builders in Chelmsford who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Chelmsford | £38 | £258 |
| Granny Annexe near Billericay | £38 | £248 |
| Granny Annexe near Witham | £36 | £240 |
| Granny Annexe near Wickford | £39 | £255 |
| Granny Annexe near Maldon | £36 | £244 |
| Granny Annexe near Brentwood | £39 | £255 |
| Granny Annexe near Braintree | £37 | £247 |
| Granny Annexe near Basildon | £39 | £251 |
| Granny Annexe near Rayleigh | £39 | £252 |
| Granny Annexe near Thundersley | £38 | £251 |
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 - £17,530

Two storey extension - £88,044

Build a timber frame extension - £26,030

Build a swimming pool - £81,030

Single storey extension - £55,592

Side return extension - £41,833

Install an RSJ - £2,230

Outbuilding - £10,030

Build a Mansard loft conversion - £52,030

Loft conversion - £34,028

Build a kitchen extension - £42,030

Hip to gable loft conversion - £42,030

Granny annexe - £87,030

Garden office - £10,030

Convert a Garage - £16,030

Garage - £18,530

Build a flat roof extension - £22,030

Build a dormer loft conversion - £42,030

Concrete foundations - £6,280

Convert a bungalow loft - £29,030

Convert a basement - £37,833