Johnstone, Glasgow and the Clyde
Side return extension in Johnstone
Infilling the narrow passage beside a Victorian or Edwardian back addition. If you live in Johnstone and want to know what a side return extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Johnstone sits in Glasgow and the Clyde, with postcode districts including PA5. Side return projects in Johnstone usually start with a drainage survey of the side passage.
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 side return extension cost in Johnstone?
In Johnstone, our guide for a side return extension is £2,180–£3,610 per square metre including VAT for a 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 |
|---|---|
| 2 m wide × 6 m deep (12 m²) | £26,000–£43,500 |
| 2.5 m wide × 7 m deep (17.5 m²) | £38,000–£63,000 |
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 side return extension in Johnstone?
Whether your side return extension in Johnstone needs a planning application depends on its size, your house and any local restrictions.
In Scotland side extensions are more restricted than rear ones under householder permitted development, and wraparounds generally need planning permission. A building warrant is required before work starts.
Scotland has no Party Wall Act. Work to shared walls is governed by property law and the title deeds, so we agree access and protection with neighbours in writing before work begins.
Classes 1A and 1B do not apply in conservation areas, and listed buildings need listed building consent. At the first visit we measure what is there now and tell you which route fits: permitted development or a planning application, plus the building warrant.
What are homes in Johnstone like to extend?
Johnstone has sandstone villas and terraces, post-war semis and four-in-a-block flats. Flats need planning permission for an extension, and every project needs a building warrant before work starts.
How a side return 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.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
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.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the accepted completion certificate and any guarantees from suppliers.
Side return extensions near Johnstone
From Johnstone, the nearest places we also cover are Paisley (3.2 miles) and Barrhead (5.2 miles).
- Side return extension in Paisley
- Side return extension in Barrhead
- Side return extension in Erskine
- Side return extension in Renfrew
- Side return extension in Clydebank
Other work in Johnstone:
FAQ
Side return extension questions in Johnstone
Do I need a party wall agreement?
Scotland has no Party Wall Act; we agree access and protection with your neighbour in writing instead.
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.
How much space does a side return add?
Typically 8 to 18 square metres, enough to turn a galley kitchen into a kitchen-diner with an island.
Do I need planning permission for a rear extension in Johnstone?
Many single-storey rear extensions are permitted development under Class 1A, but not in conservation areas; you always need a building warrant before work starts.
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.
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.