House extensions in Dunbartonshire
Every type of house extension in Dunbartonshire, from single-storey kitchen extensions to two-storey additions, side returns and orangeries. We design, handle the approvals and build.
- Towns listed6
- Price regionScotland (×0.98)
- Planning rulesScotland
- Postcode districts8
Towns we cover in Dunbartonshire
Towns we cover here include Bearsden, Clydebank, Vale of Leven, Bishopbriggs.
Guide prices for Dunbartonshire
Every figure below is a guide for Dunbartonshire, adjusted for Scotland build costs (×0.98) and including VAT. Design and council fees are shown separately on each page.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Double-storey extensions | 32 m² | £56,000 – £74,000 |
| Extensions over a garage | 12 m² | £24,500 – £32,000 |
| Wraparound extensions | 25 m² | £56,000 – £71,500 |
| Kitchen extensions | 20 m² | £41,000 – £52,000 |
| Single-storey rear extensions | 20 m² | £40,000 – £51,000 |
Do extensions in Dunbartonshire need planning permission?
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.
Which extension suits a Dunbartonshire home?
Across Scotland, extensions follow Scottish planning and building standards, including the building warrant process, which we build into the programme from the start.
For many houses here, single-storey rear extensions, double-storey extensions or bungalow extensions gives the most useful space for the budget.
Choose an extension type
- Double-storey extensions · from £37,000
- Porch extensions · from £3,900
- Kitchen extensions · from £26,000
- Annexe extensions · from £53,500
- Glass box extensions · from £29,000
- Extensions over a garage · from £23,500
- Flat roof extensions · from £20,500
- Planning permission for extensions · from £300
- Conservatory replacement extensions · from £19,500
- Side return extensions · from £17,500
- Home office extensions · from £15,500
- Pitched roof extensions · from £21,500
- Orangery extensions · from £29,000
- Side extensions · from £21,500
- Bedroom extensions · from £25,000
- Wraparound extensions · from £35,000
- Bungalow extensions · from £25,500
- Single-storey rear extensions · from £20,500
- Utility and boot room extensions · from £13,500
- Timber frame extensions · from £20,500
- Building regulations for extensions · from £850
- Extension plans and drawings · from £1,150
Neighbouring areas
Questions about extensions in Dunbartonshire
How much does an extension cost in Dunbartonshire?
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.
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.
Do I need planning permission for an extension in Dunbartonshire?
Not always. It depends on the size, position and your property's history. Scottish householder rules allow some smaller extensions without an application, but a building warrant is still needed.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Dunbartonshire, and the guide-price tool gives a range for your own size and finish in about a minute.
Book a free site visit in Dunbartonshire
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.