Need an Extension Builder in AL6? MA Gower has been helping local clients (20 mile radius) with their extension buildering jobs for many years. Get...
Claudio Lutchi
Complex Construction is an established extension buildering business in AL6. We come highly recommended and provide competitive quotes for your wor...
Wiemy jak wa?n? decyzj? dla naszych Klientów jest budowa kupno czy remont domu, dlatego stawiamy na nowoczesne i ekonomiczne rozwi?zania , a ca?? ...
From £86,960
Relax... you have found a reliable extension builder in AL6. Interior Installations is a friendly and reliable company based in AL6 who consider no...
From £86,944
STYLE BUILDING SERVICES LTD are here to help customers who need an Extension Builder in AL6. We offer a competitive rate to complete all your exten...
From £87,408
Laurdan Building LTD is an established and experienced local extension builder in AL6. Please contact us for a free, no obligation quote and compet...
From £87,400
J&R Property is an established and experienced local extension builder in AL6. Please contact us for a free, no obligation quote and competitive ra...
From £86,944
Ross Taylor Homes is an established extension buildering business in AL6. We come highly recommended and provide competitive quotes for your work.<...
From £87,480
We offer an extensive building service including a turnkey solution. We are experts in residential extensions, alterations and new builds in the He...

Building a granny annexe ranges from £86,320 (Complex Construction based in AL7) to £87,480 (Herts Premier Builders based in AL7), 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 AL6 by posting a job with HaMuch. We will send it to extension builders in AL6 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Welwyn Garden City | £42 | £268 |
| Granny Annexe near Hertford | £46 | £289 |
| Granny Annexe near Hatfield | £64 | £284 |
| Granny Annexe near Stevenage | £44 | £282 |
| Granny Annexe near Harpenden | £86 | £316 |
| Granny Annexe near Hitchin | £43 | £283 |
| Granny Annexe near East Hertfordshire | £44 | £289 |
| Granny Annexe near Ware | £47 | £296 |
| Granny Annexe near St Albans | £63 | £289 |
| Granny Annexe near North Hertfordshire | £44 | £283 |
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 - £17,569

Two storey extension - £88,103

Build a timber frame extension - £26,069

Build a swimming pool - £81,069

Single storey extension - £56,376

Side return extension - £42,274

Install an RSJ - £2,269

Outbuilding - £10,069

Build a Mansard loft conversion - £52,069

Loft conversion - £34,395

Build a kitchen extension - £42,069

Hip to gable loft conversion - £42,069

Granny annexe - £87,069

Garden office - £10,069

Convert a Garage - £16,069

Garage - £18,569

Build a flat roof extension - £22,069

Build a dormer loft conversion - £42,069

Concrete foundations - £6,319

Convert a bungalow loft - £29,069

Convert a basement - £38,274