1 review
From £10,192
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
"Did callout made safe my elctrical work thanks" - reviewed 16/05/23, REECYRUSSO
From £10,392
Need an Extension Builder in AL9? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for many yea...
From £10,280
Trusted and professional extension builder in AL9. Experienced in all extension buildering work and keeping within budget and on quote. DC Build & ...
From £10,312
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £10,152
I am a qualified, builder, electrician and plumber. I have been working in the construction industry for over 23 years and have built everything fr...
From £10,304
Hi we have 15 years of experience in building and construction industry our specialization is bathrooms and renovations please have a look at the w...
From £10,424
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £10,312
Local Boiler Plumbing & Heating Services is an established and experienced local extension builder in AL9. Please contact us for a free, no obligat...
From £9,920
NISUP BUILDING SERVICES Company specializes in the domestic and commercial building industry :1. Refurbishm...
From £10,432
Krystian Wojasiewicz is a trusted extension builder serving customers in AL9 and the surrounding area. Contact us to today to get a competitive quo...

Garden offices range from the cheapest of £9,920 (Nisup Building Services based in HA8) to the dearest of £10,432 (Krystian Wojasiewicz based in HA9), but these are only estimates.
The best way to compare costs is to get actual quotes.
Get rates and quotes to build a garden office in AL9 by posting a job with HaMuch. We'll send it to extension builders in AL9.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Garden Office near Hatfield | £64 | £283 |
| Garden Office near Potters Bar | £43 | £273 |
| Garden Office near Welwyn Garden City | £42 | £268 |
| Garden Office near St Albans | £63 | £288 |
| Garden Office near Cheshunt | £48 | £285 |
| Garden Office near Hertford | £46 | £289 |
| Garden Office near High Barnet | £43 | £272 |
| Garden Office near Borehamwood | £42 | £270 |
| Garden Office near Harpenden | £86 | £315 |
| Garden Office 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 - £17,772

Two storey extension - £88,408

Build a timber frame extension - £26,272

Build a swimming pool - £81,272

Single storey extension - £60,440

Side return extension - £44,560

Install an RSJ - £2,472

Outbuilding - £10,272

Build a Mansard loft conversion - £52,272

Loft conversion - £36,300

Build a kitchen extension - £42,272

Hip to gable loft conversion - £42,272

Granny annexe - £87,272

Garden office - £10,272

Convert a Garage - £16,272

Garage - £18,772

Build a flat roof extension - £22,272

Build a dormer loft conversion - £42,272

Concrete foundations - £6,522

Convert a bungalow loft - £29,272

Convert a basement - £40,560