Home extensions in Argyll and Bute
Every type of house extension in Argyll and Bute, from single-storey kitchen extensions to two-storey additions, side returns and orangeries. We design, handle the approvals and build.
- Towns listed3
- Price regionScotland (×0.98)
- Planning rulesScotland
- Postcode districts48

Towns we cover in Argyll and Bute
Free site visits on the mainland; island and remote addresses by arrangement, with travel costs agreed first.
Towns we cover here include Dunoon, Helensburgh, Oban.
Which extension suits a Argyll and Bute home?
Scotland's housing includes sandstone villas, terraces and tenements in the cities and plenty of post-war and modern houses and bungalows elsewhere. A building warrant is needed before work starts.
Start by comparing orangery extensions, single-storey rear extensions and bungalow extensions: between them they cover most of the layouts we see requested for houses like these.
Guide prices for Argyll and Bute
Prices on this page use our Scotland factor of ×0.98, include VAT at 20% and cover the build; your written price follows a survey and agreed drawings.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Orangery extensions | 16 m² | £43,500 – £55,000 |
| Side return extensions | 11 m² | £25,500 – £32,500 |
| Wraparound extensions | 25 m² | £56,000 – £71,500 |
| Conservatory replacement extensions | 14 m² | £29,000 – £38,000 |
| Double-storey extensions | 32 m² | £56,000 – £74,000 |
Approvals for an extension in Argyll and Bute
In Scotland, householder permitted development rules (Class 1A for single-storey ground-floor extensions and Class 1B for extensions of more than one storey) allow some smaller extensions without a planning application, within limits on depth, height and distance from the boundary. Conservation areas and listed buildings are more restricted.
In a conservation area or national scenic area the householder permitted development rights are more limited, listed homes need listed building consent, and if rights have been removed by a condition or direction, any extension needs an application.
In Scotland a building warrant from the council is needed before work starts on almost any extension, and a completion certificate is issued when the work is accepted. Building standards are set in the Scottish technical handbooks.
Every extension type in Argyll and Bute
- Bungalow extensions · from £25,500
- Building regulations for extensions · from £850
- Side return extensions · from £17,500
- Orangery extensions · from £29,000
- Pitched roof extensions · from £21,500
- Annexe extensions · from £53,500
- Side extensions · from £21,500
- Timber frame extensions · from £20,500
- Wraparound extensions · from £35,000
- Kitchen extensions · from £26,000
- Double-storey extensions · from £37,000
- Utility and boot room extensions · from £13,500
- Extension plans and drawings · from £1,150
- Bedroom extensions · from £25,000
- Conservatory replacement extensions · from £19,500
- Home office extensions · from £15,500
- Extensions over a garage · from £23,500
- Porch extensions · from £3,900
- Planning permission for extensions · from £300
- Single-storey rear extensions · from £20,500
- Glass box extensions · from £29,000
- Flat roof extensions · from £20,500
Neighbouring areas
Questions about extensions in Argyll and Bute
How much does an extension cost in Argyll and Bute?
With our Scotland factor (×0.98), a standard-spec 20 m² single-storey extension is a guide £40,000 to £51,000 including VAT. Prices for every type are linked on this page.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Argyll and Bute, and the guide-price tool gives a range for your own size and finish in about a minute.
Will my neighbours need to be told?
If you apply for planning permission the council notifies neighbours, and we agree access with them in writing for work near a shared boundary.
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.
Book a site visit in Argyll and Bute
We will measure up, check the planning position and give you honest guide figures.
- Free site visits on the mainland; islands and remote addresses by arrangement
- 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 site visit
Tell us a little about the project and we will arrange a time.