Johnstone, Glasgow and the Clyde
Bungalow rear extension in Johnstone
For homes in Johnstone, a bungalow rear extension is often the simplest way to gain space without moving. Single-storey rear extensions that keep everything on one level. We take it from survey to completion certificate.
Johnstone and its postcode districts PA5 are part of our Glasgow and the Clyde coverage. For Johnstone bungalows we design the roof first, because the low eaves decide the height of the new room.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a bungalow rear extension cost in Johnstone?
For Johnstone we work from the Scotland rate: £1,760–£2,850 per square metre of new floor, including VAT, standard specification. Prices in Scotland sit a little below our West Midlands baseline; building warrant fees and drawings are budgeted separately.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £21,000–£34,000 |
| 4 m wide × 6 m deep (24 m²) | £42,000–£68,500 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a bungalow rear extension in Johnstone?
Here is how the rules in Scotland apply to a bungalow rear extension in Johnstone.
Scottish householder permitted development (Class 1A) covers many single-storey rear extensions, with a 3 metre eaves limit, a 4 metre height limit and, within 1 metre of a boundary, a depth limit of 3 metres for terraced houses or 4 metres for others. Conservation areas are excluded, and you need a building warrant whatever the planning position.
Scotland has no larger-extension prior approval route; extensions beyond permitted development need a planning application.
Classes 1A and 1B do not apply in conservation areas, and listed buildings need listed building consent. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Johnstone like to extend?
Post-war semis and terraces are common around Johnstone, and many have room for a single-storey rear extension within Class 1A limits.
How a bungalow rear extension in Johnstone comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for the building warrant.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Bungalow rear extensions near Johnstone
From Johnstone, the nearest places we also cover are Paisley (3.2 miles) and Barrhead (5.2 miles).
- Bungalow rear extension in Paisley
- Bungalow rear extension in Barrhead
- Bungalow rear extension in Erskine
- Bungalow rear extension in Renfrew
- Bungalow rear extension in Clydebank
Other work in Johnstone:
FAQ
Bungalow rear extension questions in Johnstone
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
Do I need to move out?
Rarely; the opening into the bungalow is made late in the build.
What postcode areas do you cover around Johnstone?
Including PA5, and the surrounding Glasgow and the Clyde area.
Do you handle building control in Johnstone?
Yes. We apply for the building warrant before work starts and submit the completion certificate at the end.
How much does a bungalow rear extension cost in Johnstone?
As a guide, £1,760–£2,850 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £21,000–£34,000 at that rate. Your written price follows the survey.