Extensions in Renfrew: design, planning and build
Every type of house extension in Renfrew, from single-storey kitchen extensions to two-storey additions, side returns and orangeries. We design, handle the approvals and build.
- Postcode districtsPA1, PA4
- Price regionScotland (×0.98)
- Planning rulesScotland
- Site visitFree, no obligation
Where we work near Renfrew
Site visits are available across Renfrew (PA1, PA4). Nearby, we also take on projects in Erskine (3 miles), Paisley (3 miles), Barrhead (5 miles), Johnstone (6 miles), Newton Mearns (7 miles). Clydebank, in Dunbartonshire, is roughly 2 miles from Renfrew and also on our list.
Popular extension prices in Renfrew
Every figure below is a guide for Renfrew, adjusted for Scotland build costs (×0.98) and including VAT. Design and council fees are shown separately on each page.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Orangery extensions | 16 m² | £43,500 – £55,000 |
| Double-storey extensions | 32 m² | £56,000 – £74,000 |
| Extensions over a garage | 12 m² | £24,500 – £32,000 |
| Single-storey rear extensions | 20 m² | £40,000 – £51,000 |
| Wraparound extensions | 25 m² | £56,000 – £71,500 |
| Kitchen extensions | 20 m² | £41,000 – £52,000 |
Planning rules in Renfrew
In Scotland, householder permitted development rules (Class 1A for single-storey ground-floor extensions and Class 1B for extensions of more than one storey) allow some smaller extensions without a planning application, within limits on depth, height and distance from the boundary. Conservation areas and listed buildings are more restricted.
In a conservation area or national scenic area the householder permitted development rights are more limited, listed homes need listed building consent, and if rights have been removed by a condition or direction, any extension needs an application.
In Scotland a building warrant from the council is needed before work starts on almost any extension, and a completion certificate is issued when the work is accepted. Building standards are set in the Scottish technical handbooks.
Applications are decided by your council as planning authority.
What works best for Renfrew houses?
Across Scotland, extensions follow Scottish planning and building standards, including the building warrant process, which we build into the programme from the start.
Start by comparing orangery extensions, single-storey rear extensions and double-storey extensions: between them they cover most of the layouts we see requested for houses like these.
Choose an extension type
- Extension plans and drawings · from £1,150
- Side return extensions · from £17,500
- Single-storey rear extensions · from £20,500
- Porch extensions · from £3,900
- Timber frame extensions · from £20,500
- Bedroom extensions · from £25,000
- Bungalow extensions · from £25,500
- Kitchen extensions · from £26,000
- Flat roof extensions · from £20,500
- Building regulations for extensions · from £850
- Extensions over a garage · from £23,500
- Wraparound extensions · from £35,000
- Pitched roof extensions · from £21,500
- Planning permission for extensions · from £300
- Glass box extensions · from £29,000
- Side extensions · from £21,500
- Conservatory replacement extensions · from £19,500
- Annexe extensions · from £53,500
- Home office extensions · from £15,500
- Double-storey extensions · from £37,000
- Orangery extensions · from £29,000
- Utility and boot room extensions · from £13,500
Free site visit
It starts with a visit to your house to measure, check access and talk through ideas and budget.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Questions about extensions in Renfrew
How much does an extension cost in Renfrew?
Using our Scotland factor (×0.98), a standard-spec single-storey extension of 20 m² is a guide £40,000 to £51,000 including VAT, and a 32 m² two-storey extension £56,000 to £74,000. Your written price follows the survey.
Will my neighbours need to be told?
If you apply for planning permission the council notifies neighbours, and we agree access with them in writing for work near a shared boundary.
Do I need planning permission for an extension in Renfrew?
Not always. It depends on the size, position and your property's history. Scottish householder rules allow some smaller extensions without an application, but a building warrant is still needed.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, and in Scotland we apply for the building warrant before work starts.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Renfrew, and the guide-price tool gives a range for your own size and finish in about a minute.
Book a free site visit in Renfrew
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.