Dumbarton, Glasgow and the Clyde
Glazed rear extension in Dumbarton
For homes in Dumbarton, a glazed rear extension is often the simplest way to gain space without moving. Full-height glass, slim frames and big rooflights for the most open rear room. We take it from survey to completion certificate.
Dumbarton sits in Glasgow and the Clyde, with postcode districts including G82. If your garden in Dumbarton faces south, expect us to talk about overhangs and solar-control glass before frame colours.
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 glazed rear extension cost in Dumbarton?
In Dumbarton, our guide for a glazed rear extension is £2,660–£4,560 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) | £32,000–£54,500 |
| 4 m wide × 6 m deep (24 m²) | £64,000–£109,500 |
Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
Do you need planning permission for a glazed rear extension in Dumbarton?
Here is how the rules in Scotland apply to a glazed rear extension in Dumbarton.
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.
Insulation and glazing follow Section 6 of the Scottish Technical Handbook; the building warrant drawings show how the extension meets it.
Classes 1A and 1B do not apply in conservation areas, and listed buildings need listed building consent. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in Dumbarton like to extend?
Dumbarton 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 glazed rear extension in Dumbarton 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.
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.
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.
Glazed rear extensions near Dumbarton
From Dumbarton, the nearest places we also cover are Vale of Leven (1.9 miles) and Port Glasgow (4.6 miles).
- Glazed rear extension in Vale of Leven
- Glazed rear extension in Port Glasgow
- Glazed rear extension in Erskine
- Glazed rear extension in Clydebank
- Glazed rear extension in Greenock
Other work in Dumbarton:
FAQ
Glazed rear extension questions in Dumbarton
What postcode areas do you cover around Dumbarton?
Including G82, and the surrounding Glasgow and the Clyde area.
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 a glass extension be too hot?
Not if it is designed for its orientation, with solar-control glass, shading and ventilation.
How much does a glazed rear extension cost in Dumbarton?
As a guide, £2,660–£4,560 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £32,000–£54,500 at that rate. Your written price follows the survey.
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 you match the brick or stone on my Dumbarton house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.