Torrington Design
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
Ali Alagoz
Propello is an established and experienced local extension builder in AL4. Please contact us for a free, no obligation quote and competitive rates...
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...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Bill Matharu
Matharu Buildings is an established extension buildering business in AL4. We come highly recommended and provide competitive quotes for your work.<...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Edmond Begu
EB Construction & Building Ltd are here to help customers who need an Extension Builder in AL4. We offer a competitive rate to complete all your ex...
Relax... you have found a reliable extension builder in AL4. M & A UK Ltd is a friendly and reliable company based in AL4 who consider no job as to...
Elena nuta Radu
Plumbing, painting exterior, interior, extensions, plastering, skiming, carpeting, Flooring, you can ask us ..

Outbuilding costs in AL4 range from the cheapest of £9,936 (Bacan's cleaning painting and decorating based in LU1) to the dearest of £11,584 (Propello based in E17), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in AL4 by posting a job with HaMuch and we will send it to extension builders.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Outbuilding near St Albans | £63 | £288 |
| Outbuilding near Hatfield | £64 | £283 |
| Outbuilding near Harpenden | £86 | £315 |
| Outbuilding near Welwyn Garden City | £42 | £268 |
| Outbuilding near Potters Bar | £43 | £273 |
| Outbuilding near Borehamwood | £42 | £270 |
| Outbuilding near Hemel Hempstead | £42 | £270 |
| Outbuilding near Dacorum | £42 | £269 |
| Outbuilding near Bushey | £42 | £276 |
| Outbuilding near Hertford | £46 | £289 |
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 - £17,863

Two storey extension - £88,545

Build a timber frame extension - £26,363

Build a swimming pool - £81,363

Single storey extension - £62,264

Side return extension - £45,586

Install an RSJ - £2,563

Outbuilding - £10,363

Build a Mansard loft conversion - £52,363

Loft conversion - £37,155

Build a kitchen extension - £42,363

Hip to gable loft conversion - £42,363

Granny annexe - £87,363

Garden office - £10,363

Convert a Garage - £16,363

Garage - £18,863

Build a flat roof extension - £22,363

Build a dormer loft conversion - £42,363

Concrete foundations - £6,613

Convert a bungalow loft - £29,363

Convert a basement - £41,586