Glasgow and the Clyde
Rear extensions in Johnstone
From the first measured visit to building control sign-off, we handle rear extensions in Johnstone under one contract.
Johnstone is in Glasgow and the Clyde, with postcode districts including PA5. The nearest places we also cover are Paisley (3.2 miles) and Barrhead (5.2 miles).
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
Rear extensions we build in Johnstone
- Single-storey rear extensions
- Two-storey rear extensions
- Kitchen-diner rear extensions
- Side return extensions
- Wraparound extensions
- Glazed and glass-box rear extensions
- Rear extensions for terraced houses
- Rear extensions for semi-detached houses
- Rear extensions for bungalows
- Rear extension plans and planning applications
Also available across Glasgow and the Clyde:
- Rear extensions for detached houses
- Flat-roof rear extensions
- Pitched and lean-to roof rear extensions
- Knocking through to a rear extension
- Roof lanterns and rooflights for rear extensions
- Permitted development rear extensions
- Building Regulations for rear extensions
Rear extension prices in Johnstone
Prices in Scotland sit a little below our West Midlands baseline; building warrant fees and drawings are budgeted separately.
| Example | Guide inc VAT |
|---|---|
| Single-storey, 3 m × 4 m (12 m²) | £21,500–£35,500 |
| Single-storey, 4 m × 6 m (24 m²) | £43,500–£70,500 |
| Two-storey, 3 m × 5 m footprint (30 m²) | £51,500–£77,000 |
| Side return, about 14 m² | £30,500–£50,500 |
| Wraparound, about 25 m² | £52,500–£85,500 |
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.
Planning rules for 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.
Scottish extensions are approved by building warrant, granted by the council's building standards team before work begins, with a completion certificate submitted when the work is finished.
Nearby towns
FAQ
Questions people ask
How much is a rear extension in Johnstone?
A 3 m × 4 m single-storey rear extension is about £21,500–£35,500 including VAT at our Scotland guide rates; the written price follows a survey.
Do I need planning permission 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.
Is the site visit in Johnstone free?
Yes, with no obligation.
Do I need a party wall agreement?
Scotland has no Party Wall Act; we agree access and protection with your neighbour in writing instead.