SANDSTONE BUILDERS T/A is a trusted extension builder serving customers in Lostwithiel and the surrounding area. Contact us to today to get a compe...
From £87,184
Our building services company MS Builders (South West) Ltd has over 17 years’ experience in the industry. We have been helping customers in Liske...
From £87,088
Need an Extension Builder in Lostwithiel? DAVEY CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension buildering jo...
From £86,784
HAM & PEARCE CONSTRUCTION LTD is a trusted extension builder serving customers in Lostwithiel and the surrounding area. Contact us to today to get ...
From £87,208
We are specialist in All aspects of Masonry & General Building Works. We also offer a Design and Build service to suit your requirements.At Burton ...
From £86,840
Aston Construction Project Management is a trusted extension builder serving customers in Lostwithiel and the surrounding area. Contact us to today...
From £87,088
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,104
We are a part of the award-winning Refresh Renovation franchise network.Whether you want a simple bathroom remodel, or a large double storey extens...
From £87,104
Need an Extension Builder in Lostwithiel? Paul Clarke Architectural Builders has been helping local clients (20 mile radius) with their extension b...
From £87,064
Probuild was set up as a platform to service clients with High End affordable quality Construction & project Management with solid advice & accurat...

Building a granny annexe ranges from £86,784 (HAM & PEARCE CONSTRUCTION LTD based in PL23) to £87,208 (Burton Construction based in PL31), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in Lostwithiel by posting a job with HaMuch. We will send it to extension builders in Lostwithiel who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near St Austell | £38 | £245 |
| Granny Annexe near Newquay | £32 | £230 |
| Granny Annexe near Truro | £31 | £206 |
| Granny Annexe near Plymouth | £30 | £230 |
| Granny Annexe near Falmouth | £33 | £220 |
| Granny Annexe near Camborne | £28 | £196 |
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 - £17,540

Two storey extension - £88,060

Build a timber frame extension - £26,040

Build a swimming pool - £81,040

Single storey extension - £55,800

Side return extension - £41,950

Install an RSJ - £2,240

Outbuilding - £10,040

Build a Mansard loft conversion - £52,040

Loft conversion - £34,125

Build a kitchen extension - £42,040

Hip to gable loft conversion - £42,040

Granny annexe - £87,040

Garden office - £10,040

Convert a Garage - £16,040

Garage - £18,540

Build a flat roof extension - £22,040

Build a dormer loft conversion - £42,040

Concrete foundations - £6,290

Convert a bungalow loft - £29,040

Convert a basement - £37,950