Mandala Building Services is a family-owned design and build maintenance company, encompassing everything from residential refurbishment to large-s...
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...
Homeland Building Ltd is a trusted extension builder serving customers in Hatfield and the surrounding area. Contact us to today to get a competiti...
Amarjeet Gill
Hatfield, AL10
Architecture and Construction all in one place.
FREE DRAWINGS for all projects we build.
At One Call Bathrooms we can tailor our service to provide a bespoke service to all Landlords and Management Agents that will guar...
Buyerz Trading is an established and experienced local extension builder in Hatfield. Please contact us for a free, no obligation quote and competi...
Are you looking for resin driveways in North London? We are a leading builder of driveways and patios in North London. We have expertise in various...
Trusted and professional extension builder in Hatfield. Experienced in all extension buildering work and keeping within budget and on quote. Advanc...
IC Builders have been helping customers in St Albans and the surrounding area by providing professional, trustworthy building services.We k...
London Elite Construction is an established extension buildering business in Hatfield. We come highly recommended and provide competitive quotes fo...

Building a granny annexe ranges from £86,864 (Advance Construction Solutions based in EN6) to £87,560 (Rafix Building based in EN4), 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 Hatfield by posting a job with HaMuch. We will send it to extension builders in Hatfield who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Hatfield | £65 | £285 |
| Granny Annexe near Welwyn Garden City | £42 | £269 |
| Granny Annexe near Potters Bar | £43 | £273 |
| Granny Annexe near St Albans | £63 | £289 |
| Granny Annexe near Harpenden | £87 | £317 |
| Granny Annexe near Hertford | £46 | £290 |
| Granny Annexe near Borehamwood | £42 | £271 |
| Granny Annexe near High Barnet | £43 | £272 |
| Granny Annexe near Cheshunt | £48 | £285 |
| Granny Annexe near Hoddesdon | £46 | £296 |
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 - £17,756

Two storey extension - £88,384

Build a timber frame extension - £26,256

Build a swimming pool - £81,256

Single storey extension - £60,120

Side return extension - £44,380

Install an RSJ - £2,456

Outbuilding - £10,256

Build a Mansard loft conversion - £52,256

Loft conversion - £36,150

Build a kitchen extension - £42,256

Hip to gable loft conversion - £42,256

Granny annexe - £87,256

Garden office - £10,256

Convert a Garage - £16,256

Garage - £18,756

Build a flat roof extension - £22,256

Build a dormer loft conversion - £42,256

Concrete foundations - £6,506

Convert a bungalow loft - £29,256

Convert a basement - £40,380