Helensburgh, Glasgow and the Clyde
Two-storey rear extension in Helensburgh
We plan and build two-storey rear extensions for homeowners in Helensburgh. A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. Start with a free site visit, then a written price once the design is agreed.
Helensburgh is covered from our Glasgow and the Clyde round, including G84. Two-storey rear extensions suit semi-detached houses in Helensburgh best, where the extra bedroom matters as much as the bigger kitchen.
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 two-storey rear extension cost in Helensburgh?
A two-storey rear extension in Helensburgh is priced at £1,710–£2,560 per square metre including VAT as a guide, before kitchen fit-out and fees. 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 × 5 m footprint, two floors (30 m²) | £51,500–£77,000 |
| 4 m × 6 m footprint, two floors (48 m²) | £82,000–£123,000 |
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 two-storey rear extension in Helensburgh?
Here is how the rules in Scotland apply to a two-storey rear extension in Helensburgh.
Scottish Class 1B rights for extensions of more than one storey need a 10 metre gap to every boundary, which few gardens have. Expect a planning application as well as a building warrant for a double-storey rear extension.
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 Helensburgh like to extend?
Post-war semis and terraces are common around Helensburgh, and many have room for a single-storey rear extension within Class 1A limits.
How a two-storey rear extension in Helensburgh 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.
Two-storey rear extensions near Helensburgh
Neighbouring places we cover include Greenock (4.2 miles) and Gourock (4.7 miles).
- Two-storey rear extension in Greenock
- Two-storey rear extension in Gourock
- Two-storey rear extension in Port Glasgow
- Two-storey rear extension in Vale of Leven
- Two-storey rear extension in Dumbarton
Other work in Helensburgh:
FAQ
Two-storey rear extension questions in Helensburgh
Is the site visit in Helensburgh free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
What postcode areas do you cover around Helensburgh?
Including G84, and the surrounding Glasgow and the Clyde area.
Will we need to move out?
Rarely. The first-floor opening is made late in the job and sealed with temporary screens.
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.
How long does a rear extension take to build in Helensburgh?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.