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SC General Builders Ltd are here to help customers who need an Extension Builder in Waltham Cross. We offer a competitive rate to complete all your...
ANGLE BUILDERS is an established and experienced local extension builder in Waltham Cross. Please contact us for a free, no obligation quote and co...
Ali Alagoz
Propello is an established and experienced local extension builder in Waltham Cross. Please contact us for a free, no obligation quote and competi...
Rafal Szczepanski
Our homes need to be regularly maintained and from time to time they need to be rejuvenated, modernised and enhanced. When it comes to building wor...
Mark Garnett
Nouvell Decor is a trusted extension builder serving customers in Waltham Cross and the surrounding area. Contact us to today to get a competitive ...
Jon Howard Construction Ltd is a trusted extension builder serving customers in Waltham Cross and the surrounding area. Contact us to today to get ...
Colin
We are small building company working for the residential and domestic properties? We work on all types of buildings creating Loft conversion and H...
Roberts & Co is a family run business est.2009. We specialize in Kitchen extensions and Loft conversions, and cover Hertfordshire, Essex and Greate...
Relax... you have found a reliable extension builder in Waltham Cross. 2nwest Builders and Decorators Ltd is a friendly and reliable company based ...
Dakus Construction Ltd are here to help customers who need an Extension Builder in Waltham Cross. We offer a competitive rate to complete all your ...

Building a granny annexe ranges from £86,936 (2nwest Builders and Decorators Ltd based in E17) to £90,152 (Essex loft extensions Ltd based in CM20), 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 Waltham Cross by posting a job with HaMuch. We will send it to extension builders in Waltham Cross who will be happy to help you.
"Granny annexe" - EN3, job posted 03/08/25
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Cheshunt | £48 | £285 |
| Granny Annexe near Epping Forest | £44 | £274 |
| Granny Annexe near Hoddesdon | £46 | £296 |
| Granny Annexe near Loughton | £44 | £273 |
| Granny Annexe near Potters Bar | £43 | £273 |
| Granny Annexe near High Barnet | £43 | £272 |
| Granny Annexe near Walthamstow | £45 | £278 |
| Granny Annexe near Hertford | £46 | £290 |
| Granny Annexe near Ware | £47 | £296 |
| Granny Annexe near Muswell Hill | £44 | £273 |
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 - £18,207

Two storey extension - £89,061

Build a timber frame extension - £26,707

Build a swimming pool - £81,707

Single storey extension - £69,144

Side return extension - £49,456

Install an RSJ - £2,907

Outbuilding - £10,707

Build a Mansard loft conversion - £52,707

Loft conversion - £40,380

Build a kitchen extension - £42,707

Hip to gable loft conversion - £42,707

Granny annexe - £87,707

Garden office - £10,707

Convert a Garage - £16,707

Garage - £19,207

Build a flat roof extension - £22,707

Build a dormer loft conversion - £42,707

Concrete foundations - £6,957

Convert a bungalow loft - £29,707

Convert a basement - £45,456