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Select your affordable SG12 extension builder
Relax... you have found a reliable extension builder in SG12. Up and Out Builds Ltd is a friendly and reliable company based in SG12 who consider n...
Herts Loft Ltd is an established extension buildering business in SG12. We come highly recommended and provide competitive quotes for your work.
From £37,725
Hopson Bros Services is a trusted extension builder serving customers in SG12 and the surrounding area. Contact us to today to get a competitive qu...
From £35,850
Experienced extension builder ready to quote for your work. Groome & Sons Ltd is the best extension builder in SG12. No obligation free quotes and ...
From £37,350
D E BRACKEN BUILDING SERVICES is an established and experienced local extension builder in SG12. Please contact us for a free, no obligation quote ...
From £35,250
R & T Complete Building Services is an established and experienced local extension builder in SG12. Please contact us for a free, no obligation quo...
From £36,300
Landmark General Builders Ltd are here to help customers who need an Extension Builder in SG12. We offer a competitive rate to complete all your ex...
From £34,950
Nicholas James Home Improvements Ltd are here to help customers who need an Extension Builder in SG12. We offer a competitive rate to complete all ...
From £33,750
Need to find an Extension Builder near you for all your extension buildering work?
J B R Contracts provides a local, trusted extension buil...
From £35,850
Need an Extension Builder in SG12? TJJ Construction Ltd has been helping local clients (10 mile radius) with their extension buildering jobs for ma...

Comparing extension builders estimates for Loft conversion gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for the cost of a loft conversion in SG12 by posting your job to extension builders in SG12.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Loft Conversion near Ware | £47 | £296 |
| Loft Conversion near Hertford | £46 | £290 |
| Loft Conversion near Hoddesdon | £46 | £296 |
| Loft Conversion near East Hertfordshire | £44 | £289 |
| Loft Conversion near Welwyn Garden City | £42 | £269 |
| Loft Conversion near Cheshunt | £48 | £285 |
| Loft Conversion near Harlow | £43 | £288 |
| Loft Conversion near Hatfield | £42 | £266 |
| Loft Conversion near Stevenage | £44 | £282 |
| Loft Conversion near Potters Bar | £43 | £273 |
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 - £17,746

Two storey extension - £88,370

Build a timber frame extension - £26,246

Build a swimming pool - £81,246

Single storey extension - £59,928

Side return extension - £44,272

Install an RSJ - £2,446

Outbuilding - £10,246

Build a Mansard loft conversion - £52,246

Loft conversion - £36,060

Build a kitchen extension - £42,246

Hip to gable loft conversion - £42,246

Granny annexe - £87,246

Garden office - £10,246

Convert a Garage - £16,246

Garage - £18,746

Build a flat roof extension - £22,246

Build a dormer loft conversion - £42,246

Concrete foundations - £6,496

Convert a bungalow loft - £29,246

Convert a basement - £40,272