Porch extensions across Johnstone
From the first sketch to final sign-off, we plan and build porch extensions in Johnstone and the surrounding Renfrewshire and Inverclyde area.
- Guide price in JohnstoneFrom £3,900 inc VAT
- PlanningSmall porches may be permitted development; building warrant rules apply
- Build time2–4 weeks on site
- Postcode districtsPA5, PA10
How much does a porch extension cost in Johnstone?
Prices below are for Johnstone, using the Scotland factor of ×0.98. They are guide ranges including VAT for the build only, not a quote.
| Option | What it covers | Guide price |
|---|---|---|
| Essential | Small brick or glazed porch, up to 3 m² | £3,900 – £6,400 |
| Standard | Brick porch with tiled roof and composite door | £5,850 – £9,350 |
| Premium | Larger porch with WC or oak frame and premium glazing | £8,800 – £14,700 |
Try the guide-price tool to see a range for your own size and finish.
Working in Johnstone
Site visits are available across Johnstone (PA5, PA10). The same team covers Paisley (3 miles), Barrhead (5 miles), Erskine (6 miles), Renfrew (6 miles), all within easy reach.
Scotland's housing includes sandstone villas, terraces and tenements in the cities and plenty of post-war and modern houses and bungalows elsewhere. A building warrant is needed before work starts.
Do I need planning permission in Johnstone?
In Scotland a small porch can be permitted development (Class 1C) within limits on floor area, height and distance from a road; larger porches need planning permission, and building standards still apply, so we check whether a building warrant is needed.
The planning position for a specific Johnstone address depends on its history and any designations, which is why we check it at the first visit.
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.
Scotland has no Party Wall Act. Where work affects a shared wall or a neighbour's land, we agree access, protection and making good with your neighbour in writing before work starts.
Applications are decided by your council as planning authority.
Included in a typical project
- Tiled, slate or flat roof
- Planning check against the porch limits
- Design to suit the house style
- Brick, render or oak frame walls
How the project works
Site visits are free and there is no obligation. Where drawings are needed, the design stage is priced in writing before it starts.
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
Fixed written price
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Your questions about a porch extension in Johnstone
Will my neighbours in Johnstone be involved?
If a planning application is needed, the council notifies neighbours. Where work is close to a shared boundary, we agree access and protection with them in writing.
Do I need building regulations approval in Johnstone?
Yes. Almost every extension needs it, whatever the planning route. In Scotland that means a building warrant before work starts.
Who do I contract with for a porch extension in Johnstone?
Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.
How much does a porch cost?
Our guide range is about £3,900 to £14,700 including VAT, depending on size, materials and whether it includes a WC.
Book a free site visit in Johnstone
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.