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Mandala Building Services is a family-owned design and build maintenance company, encompassing everything from residential refurbishment to large-s...
J Wijayamohan
JJSR Construction Ltd is an established and experienced local extension builder in Borehamwood. Please contact us for a free, no obligation quote a...
Need to find an Extension Builder near you for all your extension buildering work?
BELLVIEW BUILDERS LTD provides a local, trusted extensio...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
SJ Expert Building Services are here to help customers who need an Extension Builder in Borehamwood. We offer a competitive rate to complete all yo...
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...
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
Sharp Building Ltd is an established and experienced local extension builder in Borehamwood. Please contact us for a free, no obligation quote and ...
Mario Prajar Building Services is an established and experienced local extension builder in Borehamwood. Please contact us for a free, no obligatio...
RLC Construction are here to help customers who need an Extension Builder in Borehamwood. We offer a competitive rate to complete all your extensio...

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 Borehamwood by posting your job to extension builders in Borehamwood.
"Loft conversion" - EN5, job posted 01/01/70
"Phone call" - HA8, job posted 04/04/26
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Loft Conversion near Borehamwood | £42 | £271 |
| Loft Conversion near High Barnet | £43 | £272 |
| Loft Conversion near Bushey | £43 | £278 |
| Loft Conversion near Potters Bar | £43 | £273 |
| Loft Conversion near Brent Cross | £43 | £273 |
| Loft Conversion near Watford | £43 | £280 |
| Loft Conversion near Harrow | £43 | £270 |
| Loft Conversion near Muswell Hill | £44 | £273 |
| Loft Conversion near St Albans | £43 | £272 |
| Loft Conversion near Hatfield | £42 | £266 |
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 - £17,804

Two storey extension - £88,456

Build a timber frame extension - £26,304

Build a swimming pool - £81,304

Single storey extension - £61,080

Side return extension - £44,920

Install an RSJ - £2,504

Outbuilding - £10,304

Build a Mansard loft conversion - £52,304

Loft conversion - £36,600

Build a kitchen extension - £42,304

Hip to gable loft conversion - £42,304

Granny annexe - £87,304

Garden office - £10,304

Convert a Garage - £16,304

Garage - £18,804

Build a flat roof extension - £22,304

Build a dormer loft conversion - £42,304

Concrete foundations - £6,554

Convert a bungalow loft - £29,304

Convert a basement - £40,920