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Select your affordable Plymouth extension builder
From £38,940
Stephen Trevillion
Member since October 2026
Plymouth, PL6
Minor and major building works
Gary Ede
Plymouth, PL7
Need to find an Extension Builder near you for all your extension buildering work?
PLATINUM CONSTRUCTION provides a local, trusted extensio...
Patrick Rule
Plymouth, PL5
Trading since 1997 kitchens,bathrooms lofts patios roof work and much more
Matthew Donovan
Plymouth, PL6
Need to find an Extension Builder near you for all your extension buildering work?
Donovan Construction provides a local, trusted extensio...
Luis Escrig
Plymouth, PL7
Java construction
provide a complete building service and design
we also provide building maitanance
w...
Plymouth, PL2
Need an Extension Builder in Plymouth? NCN Building & Maintenance Ltd has been helping local clients (20 mile radius) with their extension builderi...
Rob Jones
Plymouth, PL1
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Relax... you have found a reliable extension builder in Plymouth. GD ANDREW BUILDING CONTRACTORS is a friendly and reliable company based in Plymou...
Plymouth, PL3
Relax... you have found a reliable extension builder in Plymouth. M D C Building Services is a friendly and reliable company based in Plymouth who ...
Plymouth, PL6
Relax... you have found a reliable extension builder in Plymouth. MJR Construction SW Ltd is a friendly and reliable company based in Plymouth who ...

Comparing extension builders estimates for a Convert a basement 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 to convert a basement in Plymouth by posting a job with HaMuch and we will send it to extension builders in Plymouth.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Convert A Basement near Plymouth | £30 | £230 |
| Convert A Basement near Paignton | £27 | £222 |
| Convert A Basement near Newton Abbot | £27 | £236 |
| Convert A Basement near Teignbridge | £27 | £260 |
| Convert A Basement near Torbay | £27 | £223 |
| Convert A Basement near Torquay | £28 | £223 |
| Convert A Basement near St Austell | £38 | £245 |
| Convert A Basement near Exeter | £27 | £221 |
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 - £17,390

Two storey extension - £87,834

Build a timber frame extension - £25,890

Build a swimming pool - £80,890

Single storey extension - £52,792

Side return extension - £40,258

Install an RSJ - £2,090

Outbuilding - £9,890

Build a Mansard loft conversion - £51,890

Loft conversion - £32,715

Build a kitchen extension - £41,890

Hip to gable loft conversion - £41,890

Granny annexe - £86,890

Garden office - £9,890

Convert a Garage - £15,890

Garage - £18,390

Build a flat roof extension - £21,890

Build a dormer loft conversion - £41,890

Concrete foundations - £6,140

Convert a bungalow loft - £28,890

Convert a basement - £36,258