St Andrews, Fife
Single-storey rear extension in St Andrews
For homes in St Andrews, a single-storey rear extension is often the simplest way to gain space without moving. Ground-floor space across the back of the house, usually for a kitchen, dining or family room. We take it from survey to completion certificate.
St Andrews sits in Fife, with postcode districts including KY16. A depth of 3 to 4 metres keeps many single-storey rear extensions in St Andrews within permitted development, subject to the house's planning history.
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 St Andrews?
In St Andrews, our guide for a single-storey rear extension is £1,800–£2,940 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 |
|---|---|
| 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 |
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 single-storey rear extension in St Andrews?
Here is how the rules in Scotland apply to a single-storey rear extension in St Andrews.
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 St Andrews like to extend?
Post-war semis and terraces are common around St Andrews, and many have room for a single-storey rear extension within Class 1A limits.
How a single-storey rear extension in St Andrews comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
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 St Andrews
We also build single-storey rear extensions in nearby Dundee (11.2 miles) and Carnoustie (11.9 miles).
- Single-storey rear extension in Dundee
- Single-storey rear extension in Carnoustie
- Single-storey rear extension in Methil
- Single-storey rear extension in Glenrothes
- Single-storey rear extension in Arbroath
Other work in St Andrews:
FAQ
Single-storey rear extension questions in St Andrews
Is the site visit in St Andrews free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
What postcode areas do you cover around St Andrews?
Including KY16, and the surrounding Fife area.
Does it add value to the house?
Nationwide's October 2025 house price research found that a 10% increase in floor area is linked to about 5% higher value on average. It is a guide, not a promise; local agents can tell you what extended homes on your street sell for.
Who will build my extension?
Vetted building teams working under contract to us. Your contract is with S&K Property Investments and Improvement Ltd for the design and the build.
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 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.