Extra bedroom and en-suite extensions in Ayr
Our extra bedroom and en-suite extensions service in Ayr covers everything: measured survey, design, planning or permitted development checks, structural design, building control and the build itself.
Useful details for planning an extra bedroom and en-suite extension in Ayr.
- Postcode districts
- KA6, KA7 and KA19
- County / area
- Ayrshire, Scotland
- Price region
- Scotland
- Guide price
- £52,500–£71,000 (£1,880–£2,540 per m²), plus £5,500–£11,000 for the en-suite
- Approval route
- Planning permission is usually needed: Class 1B permitted development only applies if every part of the extension is at least 10 m from all boundaries. A building warrant is needed before work starts.
- Nearest towns
- Prestwick (1.6 miles), Troon (5.7 miles), Irvine (10.9 miles)
- Distance to Kilmarnock
- about 11.6 miles
- First visit
- Free, no obligation
About an extra bedroom and en-suite extension
An extra bedroom and en-suite extension is a two-storey extension planned around a new double bedroom with its own shower room on the first floor, with a ground-floor room below. It is one of the most effective ways to add space for a growing family. Nationwide's 2025 research linked adding a double bedroom and bathroom to a three-bed, one-bathroom house with value gains of up to 24%.
We cover postcode districts KA6, KA7 and KA19 in and around Ayr, along with neighbouring Prestwick, Troon and Irvine.
What it costs in Ayr
For budgeting in Ayr, allow around £52,500–£71,000 (plus £5,500–£11,000 for the en-suite) for an extra bedroom and en-suite extension with a 4 m × 3.5 m footprint on two floors (28 m² of new floor space). That's based on £1,880–£2,540 per m² including VAT for Scotland. Professional fees for drawings and the structural engineer are listed separately on our prices page.
| Spec | Per m² | A 4 m × 3.5 m footprint on two floors (28 m² of new floor space) |
|---|---|---|
| Essential | £1,730–£2,330 per m² | £48,500–£65,500 |
| Standard | £1,880–£2,540 per m² | £52,500–£71,000 |
| Premium | £2,260–£3,050 per m² | £63,000–£85,500 |
Planning and building standards in Ayr
In Scotland, an extra bedroom on a new first floor makes the extension more than one storey, so Class 1B applies, needing at least 10 m to every boundary. Most plots need a householder application, which costs £371 and is decided within two months. The building warrant then covers the escape window, ventilation and drainage.
Approval in Scotland: Householder planning application: £371. Councils have two months to decide a local planning application.
Building standards: A building warrant from the council's building standards service before work starts, and a completion certificate at the end. Scotland uses its own Technical Handbooks.
Design points for Ayr homes
Sound and privacy
Bedrooms above a kitchen or family room benefit from an insulated floor to reduce noise. Side-facing upstairs windows usually have to be obscure-glazed, so we place the main bedroom window to the rear and the en-suite window to the side where possible.
Escape window and fire safety
A new first-floor bedroom needs an escape window with a clear opening of at least 0.33 m², at least 450 mm wide and high, and the bottom no more than 1,100 mm above the floor, unless there is a protected route to the stairs. We design the windows to meet this.
How we'd run your project
Start at your house
We come to your home in Ayr, measure up, check the ground floor walls and roof structure, and note anything near the boundaries.
Drawings and permission
Our designers produce plans and elevations, then we take care of planning or permitted development checks with the council covering Ayr.
Technical design
We prepare the building warrant drawings, structural calculations and specification so the build price can be fixed.
On site
One project lead runs the job, keeps you updated and arranges inspections at each stage until completion.
Questions about extra bedroom and en-suite extensions in Ayr
Do I need planning permission for an extra bedroom and en-suite extension in Ayr?
Ayr is in Scotland. Planning permission is usually needed: Class 1B permitted development only applies if every part of the extension is at least 10 m from all boundaries. A building warrant is needed before work starts.
How much does an extra bedroom and en-suite extension cost in Ayr?
Our guide for Scotland, which covers Ayr, is £1,880–£2,540 per m² including VAT. A typical project with a 4 m × 3.5 m footprint on two floors (28 m² of new floor space) comes to about £52,500–£71,000 (plus £5,500–£11,000 for the en-suite). Design and approval fees are extra, and we fix the build price in writing once the design is agreed.
Which postcodes do you cover around Ayr?
We cover Ayr (KA6, KA7 and KA19) and nearby places including Prestwick, Troon and Irvine, plus the rest of Ayrshire. The first site visit is free.
Does an extra bedroom add value to my house?
It usually does, though not always by the full cost. Nationwide's 2025 research found that adding a double bedroom to a two-bed house was linked to about 13% higher value, and a double bedroom and bathroom on a three-bed, one-bathroom house up to 24%. Local ceiling prices still apply.
What goes on the ground floor below a new bedroom?
Whatever suits you: a bigger kitchen, a family room, a study, a utility or a downstairs shower room. The ground floor usually costs about the same whatever it is used for, apart from kitchen units and bathroom fittings, which are priced separately.
Nearby
Close to Ayr? We work across the area, including:
Other extensions in Ayr
All two-storey extension services in Ayr · Extra bedroom and en-suite extensions across Ayrshire
Want a figure first? Try our guide price tool, then book a free visit to firm it up.