Do I need planning permission for a house extension in Clarkston?

A single-storey rear extension up to 4m (detached) or 3m (semi) in Clarkston usually qualifies as permitted development from East Renfrewshire Council. A building warrant is always required.

House Extension Clarkston | Single Storey & Rear Extensions G76

Clarkston (G76) has a mix of 1930s–1970s detached and semi-detached properties with varied plot sizes, many of which suit single-storey rear extensions well. Home Decor Zone Ltd works across Clarkston, Carolside and Netherton, and regularly carries out open-plan extensions for families wanting more living space without moving.

What our prices include

All prices on this page are labour plus building materials — plaster, plasterboard, pipework and plumbing fittings, electrical cable and accessories, timber, adhesives, grout, sealants and fixings. Every quote is itemised line by line.

Not included (you buy these, or we can supply and add them to the quote): kitchen units and appliances, bathroom suites and tiles, flooring, paint and any bespoke joinery — quoted separately or supplied by you. You get our 10% trade discount at Topps Tiles, B&Q TradePoint, Wholesale Domestic and Victoria Plumbing.

Extension Options in Clarkston

Single-Storey Rear Extension

The most popular choice in G76. A rear extension of 20–30m² creates a large open-plan kitchen-dining-living space. Most standard rear extensions in Clarkston qualify as permitted development under Class 1A (Scotland) without needing planning permission from East Renfrewshire Council — up to 3m for semi-detached properties and 4m for detached. A building warrant is always required.

Open-Plan Ground Floor

Removing the wall between the existing kitchen and dining/living room — via an RSJ steel beam — combined with a rear extension gives the maximum impact on the ground floor layout. This is the single most transformative project we carry out in Clarkston and is included in our extension packages.

House Extension Cost in Clarkston 2025–26

Type	Cost	Time
Single-storey rear (20m²)	£47,000–£70,000	12–16 wks
Single-storey rear (30m²)	£68,000–£105,000	14–18 wks
Two-storey	£88,000–£138,000	20–26 wks

All prices include East Renfrewshire building warrant. Fixed-price written quote after free survey.

Planning & Building Warrant

Clarkston falls under East Renfrewshire Council. Most single-storey rear extensions qualify as permitted development. Building warrant always required from East Renfrewshire Building Standards. We handle both applications as part of our service.

FAQ

Do I need planning permission for an extension in Clarkston?

A single-storey rear extension up to 4m (detached) or 3m (semi) in Clarkston usually qualifies as permitted development — no planning permission from East Renfrewshire Council. A building warrant is always required from East Renfrewshire Building Standards.

How much does a house extension cost in Clarkston?

A 20m² single-storey rear extension in Clarkston costs approximately £47,000–£70,000 inc. building warrant. Fixed-price quote provided after a free survey.