Glass box extensions across Renfrewshire and Inverclyde
A glass extension in Renfrewshire and Inverclyde starts with the right design and the right approval route. We take care of both, then build it with our own project management.
- Guide priceFrom £29,000 inc VAT
- PlanningScottish householder rules; building warrant needed
- Towns covered7
- Site visitFree, no obligation
Covering Renfrewshire and Inverclyde
Towns we cover in Renfrewshire and Inverclyde include Paisley, Greenock, Newton Mearns, Renfrew, Barrhead, Johnstone, Erskine. Across Scotland, extensions follow Scottish planning and building standards, including the building warrant process, which we build into the programme from the start.
When a glass extension makes sense
- Period and listed-style houses where a light touch is wanted
- Small infill spaces and side returns
- Garden-facing dining rooms
Solar gain is the risk. We specify solar-control glass, plan for opening vents or sliding panels, and avoid fully glazed roofs on south-facing extensions unless shading is included.
Planning rules that apply in Renfrewshire and Inverclyde
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. Separately, almost every extension needs a building warrant from the council before work starts.
The planning position for a specific Renfrewshire and Inverclyde address depends on its history and any designations, which is why we check it at the first visit.
Building close to a public sewer needs the agreement of Scottish Water, which we check during design.
Applications are decided by your council as planning authority.
Guide prices for Renfrewshire and Inverclyde
For Renfrewshire and Inverclyde we adjust our national guide rates by ×0.98, the factor we use for Scotland. Figures include VAT; your written quote after the survey replaces them.
Typical rates in Renfrewshire and Inverclyde: £2,940 to £5,680 per m² including VAT, depending on specification.
| Size | Essential | Standard | Premium |
|---|---|---|---|
| 2 m × 4 m 8 m² | £29,000 – £35,500 | £29,000 – £37,000 | £33,500 – £45,500 |
| 3 m × 4 m 12 m² | £35,000 – £42,500 | £41,000 – £52,000 | £50,500 – £68,500 |
| 3 m × 6 m 18 m² | £52,500 – £64,000 | £61,500 – £78,000 | £75,500 – £102,500 |
For a figure based on your own dimensions, use our guide-price tool.
From first visit to completion
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
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions people ask about glass extensions
How long does a glass extension take to build in Renfrewshire and Inverclyde?
On site, typically 10 to 16 weeks once approvals are in place. Before that, allow 8–14 weeks design and approvals.
Do I need building regulations approval in Renfrewshire and Inverclyde?
Yes. Almost every extension needs it, whatever the planning route. In Scotland that means a building warrant before work starts.
Do you cover all of Renfrewshire and Inverclyde?
Yes, across the whole of Renfrewshire and Inverclyde. Site visits are free and there is no obligation.
How much does a glass extension cost?
Our guide range is about £2,940 to £5,680 per m² including VAT, because structural glass is made to order. A 12 m² standard-spec glass extension is typically £41,000 to £52,000 in Renfrewshire and Inverclyde.
Are glass extensions cold in winter?
Modern double or triple glazing with warm-edge spacers and underfloor heating keeps them comfortable. They are not as warm as a solid room, and we explain the trade-off honestly.
Book a free site visit in Renfrewshire and Inverclyde
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.