Extension Builders in Johnstone

Find extension builders in Johnstone and the Johnstone & Renfrewshire area. Specialists for house extensions, conversions, structural alterations, and new builds — all listings regularly checked.

Free directory of extension builders in Johnstone and Johnstone & Renfrewshire for house extensions, conversions, structural alterations, and new builds. No sign-up, no fees — contact Johnstone extension builders directly.

Extension Builders Listed in Johnstone

Drummond Brown Building Contractors Ltd — Drummond Brown Building Contractors Ltd is an established building contractor serving Glasgow and Central Scotland, specialising in home extensions and structural work. Their comprehensive services include house extensions, loft conversions, garage conversions, helping homeowners create additional living space without the hassle of moving. (Glasgow)
Thomas Stewart Builders Ltd — Based in Glasgow, Thomas Stewart Builders Ltd offers expert building services for homeowners looking to extend and improve their properties. Specialising in house extensions, loft conversions, garage conversions, they bring years of construction experience to every project. (Glasgow)
PJTC Ltd — PJTC Ltd provides professional extension and renovation services across Glasgow and Central Scotland. Their skilled team specialises in house extensions, loft conversions, garage conversions, transforming homes with quality construction work. (Glasgow)
S Milligan Joiners & Builders LTD — S Milligan Joiners & Builders LTD is an established building contractor serving Glasgow and Central Scotland, specialising in home extensions and structural work. Their comprehensive services include house extensions, loft conversions, garage conversions, helping homeowners create additional living space without the hassle of moving. (Glasgow)
BMCD Plumbing Heating & Gas — BMCD Plumbing Heating & Gas is a professional building contractor serving Glasgow and Central Scotland. They specialize in house extensions, renovations, and structural work, delivering quality workmanship on every project. (Glasgow)
Interior Space Design Ltd — Interior Space Design Ltd is a professional building contractor serving Glasgow and Central Scotland. They specialize in house extensions, renovations, and structural work, delivering quality workmanship on every project. (Glasgow)
Atlas Plus Refurbishment LTD — Atlas Plus Refurbishment LTD is an established building contractor serving Glasgow and Central Scotland, specialising in home extensions and structural work. Their comprehensive services include house extensions, loft conversions, garage conversions, helping homeowners create additional living space without the hassle of moving. (Glasgow)
Home Decor Zone Ltd — Based in Glasgow, Home Decor Zone Ltd offers expert building services for homeowners looking to extend and improve their properties. Specialising in house extensions, loft conversions, garage conversions, they bring years of construction experience to every project. (Glasgow)
Clyde Windows & Construction Ltd — Clyde Windows & Construction Ltd provides professional extension and renovation services across Glasgow and Central Scotland. Their skilled team specialises in house extensions, loft conversions, garage conversions, transforming homes with quality construction work. (Glasgow)
EKCO Kitchens — EKCO Kitchens is a trusted house extension and structural work specialist serving Glasgow and Central Scotland. They provide expert services including Glass house extensions, conservatories, sunrooms, working with residential and commercial clients to deliver quality results. (Glasgow)
Construction Form Scotland — Construction Form Scotland is a Glasgow-based building contractor specialising in house extensions, loft conversions, and structural alterations. With a professional approach to every project, they help homeowners maximise living space and add value to their properties. (Glasgow)
All Trade Services — All Trade Services is a multi-trade building company in Glasgow offering loft conversions, home renovations, and structural work. Their all-in-one service means one team handles every aspect of your project from design to completion. (Glasgow)
PolBuilt — PolBuilt is a Glasgow building contractor delivering house extensions, garage conversions, and full property renovations across Central Scotland. With a reputation for quality construction and honest pricing, they are a trusted choice for home improvement projects. (Glasgow)
Abercorn Builders — A local building company with over 30 years of experience in the construction industry. They offer house extensions, garage conversions, roofing services, and new build developments, with a team of qualified tradesmen and a full guarantee on their work.[4] (Paisley)
OBG Homes — With over 10 years of experience, OBG Homes specializes in single and double storey extensions, wrap-around extensions, and side return extensions. Based in Glasgow with a showsite, they serve the local Paisley community and central Scotland.[1] (Paisley)
Mackay Joiners and Builders Ltd — Home extensions, renovations, conversions, and project management. The business has completed 572 projects and is a memb. (Renfrew)
S&R Projects Ltd — House extensions, renovations, joinery, building work, bathroom and kitchen installations, and structural work.1. (Renfrew)
JBC Joiners & Builders — House extensions in Renfrewshire and across central Scotland.4. (Renfrew)
Adair Building and Groundworks — Quality house extensions with guaranteed workmanship from start to finish.2. (Renfrew)

Areas Covered by Johnstone Extension Builders

Johnstone — postcodes: PA5
Elderslie — postcodes: PA5
Kilbarchan — postcodes: PA10

Frequently Asked Questions — Extension Builders in Johnstone

Do I need planning permission for an extension in Johnstone?

In Scotland, smaller single-storey rear extensions may fall under Permitted Development rights. Two-storey extensions, side extensions, and anything that significantly changes the building's footprint will usually require a planning application. Rules depend on your property type, conservation area status, and size. Always check with your local authority before starting.

What is a building warrant and do I need one for my Johnstone extension?

A building warrant is the Scottish equivalent of building regulations approval. It is legally required for virtually all extension work including single-storey rear extensions, two-storey builds, loft conversions, and structural alterations. You submit plans to your local council before work begins. Fees range from £150–£500. Your builder should handle this but it's your responsibility to ensure it's in place.

How long does a house extension take in Johnstone?

Single-storey rear extensions typically take 3–4 months, two-storey extensions 4–6 months, loft conversions 6–8 weeks, and garage conversions 3–4 weeks. Add 6–10 weeks for planning and building warrant approvals. Scottish weather can cause delays, particularly for groundwork and roofing.

Do Glasgow extension builders cover Johnstone?

Johnstone is in Renfrewshire, just west of Paisley. Tradesmen from Paisley and Glasgow regularly serve the PA5 area. The town has Victorian terraces, post-war housing, and modern estates.

What should be included in an extension quote from a Johnstone builder?

A proper extension quote should include: a breakdown of labour and materials, groundwork, structural steelwork, building warrant fees, scaffolding, skip hire, drainage, roofing, windows, plastering, electrics, plumbing, and finishing works. It should state payment schedule (tied to milestones), timeline, and exclusions. Get at least 3 quotes and compare line by line.