Extending your home in Launceston
We design and build house extensions for homes in Launceston and the surrounding Cornwall area, with guide prices adjusted for the region.
- Postcode districtsPL15
- Price regionSouth West England (×1.02)
- Planning rulesEngland
- Site visitFree, no obligation
Do extensions in Launceston need planning permission?
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).
Choosing the right extension in Launceston
In the South West, local stone, render and brick vary from town to town, so matching materials is a big part of designing an extension that looks right.
For many houses here, annexe extensions, pitched roof extensions or single-storey rear extensions gives the most useful space for the budget.
Areas we cover around Launceston
Our survey diary covers Launceston, including PL15. Neighbouring towns we cover include Bodmin (18 miles), St Austell (26 miles), Newquay (33 miles), Truro (38 miles), Falmouth (44 miles). For homes towards Devon, Plymouth is around 21 miles away.
Guide prices for Launceston
Use these Launceston 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) |
|---|---|---|
| Conservatory replacement extensions | 14 m² | £30,500 – £39,500 |
| Double-storey extensions | 32 m² | £58,500 – £77,000 |
| Single-storey rear extensions | 20 m² | £41,500 – £53,500 |
| Extensions over a garage | 12 m² | £25,500 – £33,500 |
| Side return extensions | 11 m² | £26,500 – £34,000 |
All extension types we build in Launceston
- Bedroom extensions · from £26,500
- Orangery extensions · from £30,500
- Kitchen extensions · from £27,500
- Pitched roof extensions · from £22,500
- Timber frame extensions · from £21,000
- Porch extensions · from £4,050
- Bungalow extensions · from £26,500
- Double-storey extensions · from £38,500
- Planning permission for extensions · from £350
- Utility and boot room extensions · from £14,000
- Annexe extensions · from £56,000
- Single-storey rear extensions · from £21,000
- Building regulations for extensions · from £900
- Flat roof extensions · from £21,000
- Glass box extensions · from £30,500
- Conservatory replacement extensions · from £20,000
- Extension plans and drawings · from £1,200
- Side extensions · from £22,000
- Extensions over a garage · from £24,000
- Side return extensions · from £18,000
- Wraparound extensions · from £36,500
- Home office extensions · from £16,000
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
Fixed written price
You receive a written, itemised price and programme. Nothing starts until you are happy with it.
Build and sign-off
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Questions about extensions in Launceston
How much does an extension cost in Launceston?
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.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Launceston, and the guide-price tool gives a range for your own size and finish in about a minute.
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.
Will my neighbours need to be told?
If you apply for planning or prior approval the council notifies them, and in England party wall notices may be needed for work near a shared boundary.
Book a free site visit in Launceston
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.