Greenock, Glasgow and the Clyde
Semi-detached rear extension in Greenock
Single or two-storey extensions for semi-detached houses, with side access and one party wall. We design, get the approvals for and build rear extensions for semi-detached houses in Greenock and the surrounding area, with one contract from the first survey to building control sign-off.
Greenock and its postcode districts PA14, PA15, PA16 and PA19 are part of our Glasgow and the Clyde coverage. Semi-detached houses are common across Glasgow and the Clyde, and their side access makes rear extensions quicker to build.
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 semi-detached rear extension cost in Greenock?
A semi-detached rear extension in Greenock is priced at £1,800–£2,940 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 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 semi-detached rear extension in Greenock?
Planning for a semi-detached rear extension in Greenock follows the Scottish householder rules.
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.
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.
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 Greenock like to extend?
Post-war semis and terraces are common around Greenock, and many have room for a single-storey rear extension within Class 1A limits.
How a semi-detached rear extension in Greenock comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
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.
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.
Semi-detached rear extensions near Greenock
Neighbouring places we cover include Gourock (2.4 miles) and Port Glasgow (2.9 miles).
- Semi-detached rear extension in Gourock
- Semi-detached rear extension in Port Glasgow
- Semi-detached rear extension in Helensburgh
- Semi-detached rear extension in Vale of Leven
- Semi-detached rear extension in Dumbarton
Other work in Greenock:
FAQ
Semi-detached rear extension questions in Greenock
Is the site visit in Greenock 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.
Can I match pebbledash or render?
Yes. Many semis are refinished with new render across the whole back elevation so old and new match.
What postcode areas do you cover around Greenock?
Including PA14, PA15, PA16 and PA19, and the surrounding Glasgow and the Clyde area.
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 Greenock?
Yes. We apply for the building warrant before work starts and submit the completion certificate at the end.