Home extensions in Truro
From a small utility to a two-storey addition, we take on house extensions throughout Truro, starting with a free visit and a planning check.
- Postcode districtsTR1
- Price regionSouth West England (×1.02)
- Planning rulesEngland
- Site visitFree, no obligation
Truro and surrounding towns
Site visits are available across Truro (TR1). Nearby, we also take on projects in Falmouth (8 miles), Redruth (8 miles), Newquay (10 miles), Camborne (11 miles), St Austell (13 miles). Just over the Devon border, Plymouth is about 41 miles away.
Guide prices for Truro
Use these Truro guide prices to sense-check a budget; the guide-price tool narrows them to your own size, and the site visit turns them into a written figure.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Kitchen extensions | 20 m² | £42,500 – £54,500 |
| Double-storey extensions | 32 m² | £58,500 – £77,000 |
| Wraparound extensions | 25 m² | £58,500 – £74,000 |
| Extensions over a garage | 12 m² | £25,500 – £33,500 |
| Side return extensions | 11 m² | £26,500 – £34,000 |
| Conservatory replacement extensions | 14 m² | £30,500 – £39,500 |
| Orangery extensions | 16 m² | £45,500 – £57,500 |
Planning and building control in Truro
In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.
In England a single-storey side extension can be permitted development if it is no more than 4 m high and no wider than half the width of the original house. Two-storey side extensions, and any side extension on designated land such as a conservation area, need a householder planning application.
In a conservation area, national park, National Landscape, the Broads or a World Heritage Site the permitted development limits are tighter (no side or two-storey extensions without an application). Listed homes need listed building consent, and if permitted development rights have been removed, any extension needs an application.
If the work involves a shared wall, building on the boundary, or digging foundations within 3 m (sometimes 6 m) of a neighbour's building, the Party Wall etc. Act 1996 applies and notice must be served before work starts: two months for work to a party wall, one month for new walls on the boundary and for excavations.
Applications are decided by the local planning authority (your district, borough or unitary council).
Which extension suits a Truro home?
South West homes range from terraced streets in the cities to stone cottages and bungalows in the countryside, and conservation areas are common in historic centres.
For many houses here, pitched roof extensions, annexe extensions or single-storey rear extensions gives the most useful space for the budget.
Choose an extension type
- Double-storey extensions · from £38,500
- Porch extensions · from £4,050
- Timber frame extensions · from £21,000
- Single-storey rear extensions · from £21,000
- Glass box extensions · from £30,500
- Conservatory replacement extensions · from £20,000
- Home office extensions · from £16,000
- Utility and boot room extensions · from £14,000
- Building regulations for extensions · from £900
- Side extensions · from £22,000
- Planning permission for extensions · from £350
- Kitchen extensions · from £27,500
- Orangery extensions · from £30,500
- Side return extensions · from £18,000
- Flat roof extensions · from £21,000
- Bedroom extensions · from £26,500
- Extensions over a garage · from £24,000
- Extension plans and drawings · from £1,200
- Annexe extensions · from £56,000
- Wraparound extensions · from £36,500
- Bungalow extensions · from £26,500
- Pitched roof extensions · from £22,500
Free site visit
First, a site visit: we look at the house, garden, access and drains and listen to what you need.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions about extensions in Truro
How much does an extension cost in Truro?
Using our South West England factor (×1.02), a standard-spec single-storey extension of 20 m² is a guide £41,500 to £53,500 including VAT, and a 32 m² two-storey extension £58,500 to £77,000. Your written price follows the survey.
Who do I contract with?
Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Do I need planning permission for an extension in Truro?
Not always. It depends on the size, position and your property's history. Many single-storey rear extensions in England are permitted development or can use prior approval.
How long does an extension take in Truro?
Usually 2 to 4 months of design and approvals, then 10 to 16 weeks on site for a single-storey extension or 16 to 24 weeks for two storeys.
Book a free site visit in Truro
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.