From £87,064
We pride ourselves in offering transparent, collaborative construction services, defining your project, through planning and taking your project t...
From £86,984
Abalon is Western Canada’s leading foundation repair and basement waterproofing company, operating in the Edmonton area for over 40 years (50 yea...
From £87,024
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
From £87,480
Building services company Renospace was established in 2000. Since then we have been helping customers in Hertfordshire and the surrounding area by...
From £87,400
Redbourn, AL3
Bob's Home Maintenance are here to help customers who need an Extension Builder in Redbourn. We offer a competitive rate to complete all your exten...
From £87,440
IC Builders have been helping customers in St Albans and the surrounding area by providing professional, trustworthy building services.We k...
From £87,344
Trusted and professional extension builder in Redbourn. Experienced in all extension buildering work and keeping within budget and on quote. Peter'...
From £87,112
4siblings are here to help customers who need an Extension Builder in Redbourn. We offer a competitive rate to complete all your extension builderi...
From £87,320
Relax... you have found a reliable extension builder in Redbourn. Designer Shade Solutions is a friendly and reliable company based in Redbourn who...
From £87,312
Trusted and professional extension builder in Redbourn. Experienced in all extension buildering work and keeping within budget and on quote. Home B...

Building a granny annexe ranges from £86,984 (Abalon Construction based in ZZ99) to £87,480 (RenoSpace based in AL3), 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 Redbourn by posting a job with HaMuch. We will send it to extension builders in Redbourn who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near St Albans | £63 | £288 |
| Granny Annexe near Harpenden | £86 | £315 |
| Granny Annexe near Hemel Hempstead | £42 | £270 |
| Granny Annexe near Dacorum | £42 | £269 |
| Granny Annexe near Hatfield | £64 | £283 |
| Granny Annexe near Luton | £41 | £278 |
| Granny Annexe near Welwyn Garden City | £42 | £268 |
| Granny Annexe near Berkhamsted | £41 | £263 |
| Granny Annexe near Bushey | £42 | £276 |
| Granny Annexe near Watford | £43 | £278 |
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 - £17,748

Two storey extension - £88,372

Build a timber frame extension - £26,248

Build a swimming pool - £81,248

Single storey extension - £59,960

Side return extension - £44,290

Install an RSJ - £2,448

Outbuilding - £10,248

Build a Mansard loft conversion - £52,248

Loft conversion - £36,075

Build a kitchen extension - £42,248

Hip to gable loft conversion - £42,248

Granny annexe - £87,248

Garden office - £10,248

Convert a Garage - £16,248

Garage - £18,748

Build a flat roof extension - £22,248

Build a dormer loft conversion - £42,248

Concrete foundations - £6,498

Convert a bungalow loft - £29,248

Convert a basement - £40,290