Helensburgh, Glasgow and the Clyde
Terraced house rear extension in Helensburgh
We plan and build rear extensions for terraced houses for homeowners in Helensburgh. Rear and side return extensions for terraces, with access through the house and two neighbours. Start with a free site visit, then a written price once the design is agreed.
Helensburgh and its postcode districts G84 are part of our Glasgow and the Clyde coverage. Terraced streets make up much of the housing in parts of Glasgow and the Clyde, and most rear extensions here go in without side access.
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 terraced house rear extension cost in Helensburgh?
A terraced house rear extension in Helensburgh is priced at £1,950–£3,140 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 wide × 4.5 m deep (13.5 m²) | £26,500–£42,500 |
| 3 m wide × 6 m deep (18 m²) | £35,000–£56,500 |
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 terraced house rear extension in Helensburgh?
Here is how the rules in Scotland apply to a terraced house rear extension in Helensburgh.
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.
There is no Party Wall Act in Scotland; neighbour matters are handled through the title deeds, common law and written agreement before work starts.
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 Helensburgh like to extend?
Helensburgh 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 terraced house 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.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Approvals
Permitted development check or planning application, then building warrant drawings and structural calculations, plus a written agreement with neighbours for any shared-wall work.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the accepted completion certificate.
Terraced house rear extensions near Helensburgh
Neighbouring places we cover include Greenock (4.2 miles) and Gourock (4.7 miles).
- Terraced house rear extension in Greenock
- Terraced house rear extension in Gourock
- Terraced house rear extension in Port Glasgow
- Terraced house rear extension in Vale of Leven
- Terraced house rear extension in Dumbarton
Other work in Helensburgh:
FAQ
Terraced house rear extension questions in Helensburgh
Do I need a party wall agreement?
Scotland has no Party Wall Act; we agree access and protection with your neighbour in writing instead.
Do you handle building control in Helensburgh?
Yes. We apply for the building warrant before work starts and submit the completion certificate at the end.
Can you build without side access?
Yes. Materials come through the house in protected runs or over the roof by crane on tight sites.
What postcode areas do you cover around Helensburgh?
Including G84, and the surrounding Glasgow and the Clyde area.
Is the site visit in Helensburgh free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
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.