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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 North Watford. Please contact us for a free, no obligation quote...
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 North Watford. Please contact us for a free, no obligation quote an...
Mario Prajar Building Services is an established and experienced local extension builder in North Watford. Please contact us for a free, no obligat...
Need to find an Extension Builder near you for all your extension buildering work?
MAX CONSTRUCTION LTD provides a local, trusted extension...
RLC Construction are here to help customers who need an Extension Builder in North Watford. We offer a competitive rate to complete all your extens...
Relax... you have found a reliable extension builder in North Watford. C T Edwards is a friendly and reliable company based in North Watford who co...
Relax... you have found a reliable extension builder in North Watford. Building Service and Support Ltd is a friendly and reliable company based in...
ALG Renovations is a well established, trustworthy, reliable and professional operation with over 17 years experience myself in the trade, base...

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 North Watford by posting your job to extension builders in North Watford.
"Loft conversion" - WD24, job posted 12/07/25
"Loft conversion - (2 Rooms and a shower) Total Area - 40 square metres)" - WD19, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Loft Conversion near Watford | £43 | £280 |
| Loft Conversion near Bushey | £43 | £278 |
| Loft Conversion near Rickmansworth | £43 | £282 |
| Loft Conversion near Borehamwood | £42 | £271 |
| Loft Conversion near St Albans | £43 | £272 |
| Loft Conversion near Dacorum | £42 | £275 |
| Loft Conversion near Harrow | £43 | £270 |
| Loft Conversion near Hemel Hempstead | £43 | £276 |
| Loft Conversion near Gerrards Cross | £43 | £283 |
| Loft Conversion near Hillingdon | £43 | £276 |
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 - £17,722

Two storey extension - £88,334

Build a timber frame extension - £26,222

Build a swimming pool - £81,222

Single storey extension - £59,448

Side return extension - £44,002

Install an RSJ - £2,422

Outbuilding - £10,222

Build a Mansard loft conversion - £52,222

Loft conversion - £35,835

Build a kitchen extension - £42,222

Hip to gable loft conversion - £42,222

Granny annexe - £87,222

Garden office - £10,222

Convert a Garage - £16,222

Garage - £18,722

Build a flat roof extension - £22,222

Build a dormer loft conversion - £42,222

Concrete foundations - £6,472

Convert a bungalow loft - £29,222

Convert a basement - £40,002