Renfrew, Glasgow and the Clyde
Single-storey rear extension in Renfrew
Ground-floor space across the back of the house, usually for a kitchen, dining or family room. If you live in Renfrew and want to know what a single-storey rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Renfrew is covered from our Glasgow and the Clyde round, including PA4. On post-war semis and terraces like those around Renfrew, a single-storey rear extension is usually the simplest way to fix a small back kitchen without touching the bedrooms.
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 single-storey rear extension cost in Renfrew?
Guide prices for a single-storey rear extension in Renfrew start from our Scotland rate of £1,800–£2,940 per square metre, including VAT. 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) | £21,500–£35,500 |
| 4 m wide × 5 m deep (20 m²) | £36,000–£59,000 |
| 4 m wide × 6 m deep (24 m²) | £43,500–£70,500 |
We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
Do you need planning permission for a single-storey rear extension in Renfrew?
Here is how the rules in Scotland apply to a single-storey rear extension in Renfrew.
In Scotland a single-storey rear extension can be permitted development under Class 1A: eaves no higher than 3 metres and an overall height of 4 metres, and where any part is within 1 metre of a boundary it can project no more than 3 metres on a terraced house or 4 metres on other houses. The rights do not apply in conservation areas, and a building warrant is still needed before work starts.
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 Renfrew like to extend?
Post-war semis and terraces are common around Renfrew, and many have room for a single-storey rear extension within Class 1A limits.
How a single-storey rear extension in Renfrew comes together
Free site visit
We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.
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.
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.
Single-storey rear extensions near Renfrew
We also build single-storey rear extensions in nearby Clydebank (2.1 miles) and Erskine (3.0 miles).
- Single-storey rear extension in Clydebank
- Single-storey rear extension in Erskine
- Single-storey rear extension in Paisley
- Single-storey rear extension in Bearsden
- Single-storey rear extension in Barrhead
Other work in Renfrew:
FAQ
Single-storey rear extension questions in Renfrew
How much does a single-storey rear extension cost in Renfrew?
As a guide, £1,800–£2,940 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £21,500–£35,500 at that rate. Your written price follows the survey.
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.
Will the extension make the room behind it dark?
Not if it is designed well. Rooflights or a lantern over the old back room, and a wide opening into it, keep daylight reaching the middle of the house.
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 you match the brick or stone on my Renfrew house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Do I need planning permission for a rear extension in Renfrew?
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.