Extensions in Kilmarnock: design, planning and build
From a small utility to a two-storey addition, we take on house extensions throughout Kilmarnock, starting with a free visit and a planning check.
- Postcode districtsKA1, KA2, KA3
- Price regionScotland (×0.98)
- Planning rulesScotland
- Site visitFree, no obligation
Kilmarnock extension prices at a glance
Use these Kilmarnock 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 | £29,000 – £38,000 |
| Side return extensions | 11 m² | £25,500 – £32,500 |
| Extensions over a garage | 12 m² | £24,500 – £32,000 |
| Orangery extensions | 16 m² | £43,500 – £55,000 |
| Wraparound extensions | 25 m² | £56,000 – £71,500 |
Kilmarnock and surrounding towns
Our survey diary covers Kilmarnock, including KA1, KA2, KA3. Neighbouring towns we cover include Irvine (6 miles), Troon (7 miles), Kilwinning (9 miles), Saltcoats (11 miles), Ayr (12 miles). Just over the Renfrewshire and Inverclyde border, Newton Mearns is about 13 miles away.
What works best for Kilmarnock houses?
Across Scotland, extensions follow Scottish planning and building standards, including the building warrant process, which we build into the programme from the start.
The types we would usually look at first for a home in Kilmarnock are single-storey rear extensions, double-storey extensions and orangery extensions, depending on the garden and how the house is laid out.
Planning and building control in Kilmarnock
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.
Applications are decided by your council as planning authority.
Extension types and starting prices
- Bungalow extensions · from £25,500
- Home office extensions · from £15,500
- Utility and boot room extensions · from £13,500
- Extension plans and drawings · from £1,150
- Double-storey extensions · from £37,000
- Side extensions · from £21,500
- Pitched roof extensions · from £21,500
- Orangery extensions · from £29,000
- Wraparound extensions · from £35,000
- Extensions over a garage · from £23,500
- Flat roof extensions · from £20,500
- Kitchen extensions · from £26,000
- Timber frame extensions · from £20,500
- Annexe extensions · from £53,500
- Single-storey rear extensions · from £20,500
- Building regulations for extensions · from £850
- Conservatory replacement extensions · from £19,500
- Porch extensions · from £3,900
- Glass box extensions · from £29,000
- Side return extensions · from £17,500
- Planning permission for extensions · from £300
- Bedroom extensions · from £25,000
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
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 Kilmarnock
How much does an extension cost in Kilmarnock?
Using our Scotland factor (×0.98), a standard-spec single-storey extension of 20 m² is a guide £40,000 to £51,000 including VAT, and a 32 m² two-storey extension £56,000 to £74,000. Your written price follows the survey.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, and in Scotland we apply for the building warrant before work starts.
Do I need planning permission for an extension in Kilmarnock?
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.
How long does an extension take in Kilmarnock?
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.
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.
Book a free site visit in Kilmarnock
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.