Extension Builders in Johnstone

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 5 (5 reviews)

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Some of our top rated extension builders in Johnstone

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Keels Joinery & Construction Ltd
No reviews yet
Extension Builder in Johnstone
We are a family run, up and coming Joinery business based in Glasgow. We specialise in full property refurbishments including all building works, conversions and extensions. Our award winning team offer a hands off and stress free approach to you building works, as we know this can be a stressful time for you and your family, we implement our tried and tested approach to providing you with an efficient and high end service. Over the years, we have built up a large following on social media through our “we build, you watch” approach. This allows customers to log into their social media and see what stage we are at in their project. We post what we are doing daily along with helpful tips and tricks for our followers. Many of our past customers have loved this approach as they can see what stage their project is at from the comfort of their office or even from abroad. We also enjoy sharing our daily work life and being as honest as transparent with our customers as possible
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C MCPHERSON BUILDERS LIMITED
Rating: 5 out of 5
Extension Builder in Johnstone
We are a small family run business with over 30 years experience covering all works from small to large projects, covering all trades.
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Latest review:
Extensions- 30 Apr 2019
Colin was a fantastic find! A great tradesman with his own professional team. He turned up on time and worked all the issues the build presented. I can highly recommend Colin and look forward to working with him on future projects.
Fortis Construction Group Ltd
No reviews yet
Extension Builder in Johnstone
Fortis Construction Group has proudly served the commercial and residential construction needs of clients throughout the UK and Ireland for many years. Built on a foundation of hands-on ownership and driven by an experienced, dedicated team, Fortis has earned its reputation as one of Central Scotland’s premier construction companies. Our success is rooted in a steadfast commitment to core values such as integrity, quality craftsmanship, and exceptional client service. We understand that every project is unique, which is why we tailor our approach to meet the specific needs and visions of each client. As your trusted commercial construction partner, Fortis Construction Group ensures the highest standards of safety, quality, and professionalism on every site. Our rigorous attention to detail and proactive project management means you can rely on us to deliver your project on time and within budget — without ever compromising on excellence. From initial planning and design through to final completion, we work closely with our clients, consultants, and suppliers to create buildings and spaces that stand the test of time.
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B H JOINERS LTD
No reviews yet
Extension Builder in Johnstone
Im a time served joiner with HNC construction management. I do all types of joinery, from small jobs to conversions. All work did to a very high standard.
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Jd_joinery
Rating: 1 out of 5
Extension Builder in Johnstone
Hard-working and organized Carpenter with 10+ years of experience working on residential and commercial construction projects with precise attention to detail. Dedicated to ensuring safety of my squad and homeowner before, during, and after projects. We are based in Glasgow although we do get work in surrounding areas often.
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Latest review:
Carpentry- 22 Mar 2026
Told me he had laid engineered wood herringbone flooring before and ended destroyed my entire flooring. When they only laid just over half the flooring and had used over 90% of my flooring and took 9 hours to do so. Then told me they would need to come back to finnish tomorrow, I knew something wasnt right. After having a quick look at the work, I wasnt convinced and could tell they didnt know what they were doing as the work they had done looked night and day compairing to the same flooring in my livingroom. Ended up having to get a herringbone flooring professional come asses this work and see if this was salvegable as I knew quality was really bad. Professional advised us to lift it as not only it looked awful but gaps where huge, it was incorrectly laid and wouldnt last, wasnt water tight and he also found most the flooring wasnt even glue down. I have lost all my flooring and need to repurchase this. Would have gave a 0 but wouldnt let me. (AVOID AT ALL COSTS)
AB Joinery Services
Rating: 5 out of 5
Extension Builder in Johnstone
22 years experience in carpentry, joinery, kitchen fitting, groundworks, general maintenance, bespoke wardrobes
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Latest review:
Handyman- 3 Aug 2019
Alan came exactly on time and was friendly and did an amazing job. He went above and beyond to make sure our tv was secure and safe on the wall and we will be hiring him again for other joinery work we need done.
Buildscape Projects LTD
No reviews yet
Extension Builder in Johnstone
Here at Buildscape Projects we offer a broad range of building services provided by a versatile team with 25 years of experience. We cover electrics, plumbing, carpentry, plastering, wallpapering, painting and interior finishing, tiling, roof repairs, conservatory construction, landscaping and gardening, decking and many more services tailored to your individual needs. Whatever the job, we take a professional approach and pay careful attention to detail to make sure high standards are met.
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New Land Renovations Ltd
No reviews yet
Extension Builder in Johnstone
We work on projects, from design to completion, commercial and residential, of any scale. Our team consists of four in-house joiners, as well well as a team of structural and groundworks crew. Our network and resources are varied, managing projects from a lower budget to the extravagant
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Aki
No reviews yet
Extension Builder in Johnstone
I am a qualified civil engineer with over 14 years of experience in construction, including building, renovation, and structural projects. I have strong skills in general building work, installations, and finishing. I am reliable, hardworking, and always focused on quality and customer satisfaction. Based in Glasgow, I am ready to take on both small and large jobs.
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ABC Construction (SCOTLAND) Ltd
Rating: 5 out of 5
Extension Builder in Johnstone
As an experienced Structural Engineer with the team of great builders (including joiners, roofers, plumbers, decorators etc.) I provide my clients with the Design and Build service.
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Latest review:
Extensions- 27 Aug 2015
Andrew and his team are all hard working, where the work is all to a high standard. All his workers are polite and work in all weather, often doing 12 hours days. The finish is better than I have experienced from other tradesmen. I was also kept abreast if on the rare occasion that someone could not turn up. It was clear that he showed a passion for 'doing it right', which included improving on the original plans. I am happy to recommend him and his team. A. HOLMS
GCS Precision Projects Ltd
Rating: 5 out of 5
Extension Builder in Johnstone
We are Civil Engineering and Building firm based in Ayrshire who carry out projects of all sizes throughout Scotland. We have a vastly experienced team who have a track record of carrying out quality, cost-effective projects within time and budget.
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Latest review:
Landscaping- 23 Apr 2026
Absolutely fantastic professionalism from Gary, Chloe and their team of workmen. Excellent communication, punctual and no pressure approach. Excellent turn around time with confirmation of quote to starting work on our garden. Delighted and highly impressed with our progress and experience so far.
Gallagher&son urban innovations and renovations
No reviews yet
Extension Builder in Johnstone
Good and trust worthy worker. Good overall building knowledge,interior and exterior. Have multiple trade skill set with 30 years experience and take pride in my work
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SWB Shopfitting & Joinery
No reviews yet
Extension Builder in Johnstone
Here at SWB Shopfitting & Joinery ,we cover all kinds of drylining, suspended ceilings and joinery works commercial and private.
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Oakburn joinery
No reviews yet
Extension Builder in Johnstone
We are a joinery & building company who have been working in the construction industry for over 20yrs .we work to the highest of standards and bring projects to an end with attention to detail with pride in our workmanship .From full Renovations to your smaller projects all work is welcome .We carry every trade also which helps keep the customers from having to deal with all the different trades which will also help as the project goes through the stages .
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Crew Building and Maintenance Ltd
Rating: 5 out of 5
Extension Builder in Johnstone
I have over 40 years experience in the building trade working as a joiner and controlling large jobs and new builds , we also install steel work to engineers specification for large openings I have a vast knowledge of building extensions and doing loft conversions. Indeed we will do any job required in your home or office from small jobs to larger projects. Find us on Facebook and have a look at a few jobs we have completed Please note we cover all aspect of the building trade We are also experienced in Groundworks patios driveways etc again can all be seen on our Facebook and Google pages
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Latest review:
Extensions- 24 Jun 2026
Absolutely delighted with our new extension and kitchen. The whole team were fantastic from start to finish. They turned up every morning at 8am sharp, worked hard all day and kept us informed throughout the build. Nothing was ever too much trouble and it was clear they took real pride in their work. The quality of the workmanship is outstanding. Not only did they build a fantastic extension, but they also fitted our kitchen to a very high standard. The attention to detail throughout the project has been excellent. Finding reliable builders can be stressful, but these guys were professional, trustworthy and a pleasure to have around. They delivered exactly what they promised and the finished result has completely transformed our home. We wouldn’t hesitate to recommend them to anyone looking for an extension, renovation or kitchen installation. We would definitely use them again in the future and would happily recommend them to family and friends. Thanks again for a brilliant job
JPC JOINERY
New on MyBuilder
Extension Builder in Johnstone
Hi, my names Joe and I am a fully qualified joiner / carpenter in the southside of Glasgow. I have experience in all aspects of carpentry and joinery and are able to take on any jobs of any needs. Added to the portfolio is just a small handful of before and afters pics of jobs taken on and complete.
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Top rated Extension Builders

Our Extension Builders in Johnstone, are rated 5 out of 5 based on 5 reviews from customers like you.

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Easily find verified local tradespeople. Just post your job to get quotes from tradespeople near you across the UK.

What types of services are offered by local extension builders in Johnstone?

Building an extension is a major milestone for any home. It’s not just about adding extra space, it’s a big step that can transform how you live day to day, opening up new possibilities for comfort, lifestyle, and family needs.

This is why it’s so important to find the right extension builders in Johnstone for you. They can help with a variety of tasks and projects, including:

Extending your home with an extra room
Two+ storey extensions
Adding partition walls to create more rooms
Building annexes or external structures

To find the right extension builder near you, simply post your job on MyBuilder. Explain the type of help you’re looking for, and then home extension builders in Johnstone who are available and interested can respond to your post.

Browse profiles, read customer reviews and get quotes from your chosen Johnstone extension builders, all before you decide who to hire.

What are the hourly rates of extension builders in Johnstone?

Before getting started with your extension project, it’s important to have a clear budget in place. On average, extension builders in Johnstone will charge between £16 and £42 per hour.

Single-storey rear extensions cost between £20,000 and £60,000 depending on size and finish.
The cost of double-storey extensions, which add more space and value, can range from £100,000 to over £170,000.
Larger wrap-around extensions that combine multiple extension types can range from £40,000 to over £120,000.

The cost of an extension will vary depending on your property. For instance, extending in certain areas may require structural adjustments to ensure stability, which can increase your material and labour costs.

To get an accurate price for your home extension, request detailed quotes from several Johnstone extension builders near you on MyBuilder. This allows you to compare what each quote covers and how much your Johnstone home extension project is likely to cost.

Find extension builders in Johnstone with MyBuilder

Hiring the right extension builder in Johnstone with MyBuilder couldn’t be easier. Just follow these simple steps:

Step 1: Post your extension project on MyBuilder

Whether you’re planning a single-storey extension, a loft conversion, or adding a new room, post your job on MyBuilder to find local Johnstone extension builders. Once your job is live, we’ll share it with home extension builders in Johnstone who can express their interest.

Step 2: Compare different extension builders in Johnstone

When you start receiving interest, review profiles of local Johnstone extension builders, check their previous work, and read real customer reviews. Ask about timelines, materials, and request detailed quotes.

Step 3: Hire Johnstone extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Johnstone, compare their experience, guarantees, and costs before choosing who to hire.

You’ll also have confidence knowing that every tradesperson on MyBuilder is verified through several checks, including:

ID verification: When a tradesperson joins MyBuilder, we ask for a valid ID, such as a passport, ID card, or eIDAS certificate.
Company verification: For tradespeople operating under a company, we make sure every tradesperson has a registered business.

Did you know? Our continuous monitoring and complaints process ensures that tradespeople who don’t meet our standards are promptly removed from MyBuilder’s platform.

Johnstone extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a Johnstone extension builder before hiring?

Before hiring an extension builder in Johnstone or extension building company in Johnstone, ask a few key questions to make sure you’re choosing the right professional for your home extension project.

What qualifications and experience do you have as an extension builder in Johnstone?

An extension builder in Johnstone should have a strong track record with similar projects and relevant building qualifications or trade memberships, such as the Federation of Master Builders (FMB) or TrustMark.

Will my home extension meet all building regulations and planning requirements?

Your Johnstone extension builder should ensure the project complies with Building Regulations and, where necessary, handle or assist with planning permissions. Ask how they manage building control inspections and what documentation you’ll receive once the project is complete.

What experience do you have with similar extensions in Johnstone?

Ask to see examples of their previous work, or view examples of their work on MyBuilder. Ideally projects similar to yours in scale and design. This helps you assess the Johnstone extension builder’s ability to deliver a result that meets your expectations.

How long will the extension take to complete?

Extension project timelines can vary depending on size, complexity, and weather. A typical single-storey extension might take around 8 - 12 weeks. Request a detailed schedule so you know what to expect and when key milestones will be reached.

Do you offer a guarantee for your work? Most Johnstone extension builders offer a guarantee or warranty on their work, often between 1 and 10 years depending on the project and materials used. This gives you assurance that any issues will be resolved after completion.

If you still have questions about the professional you are looking to hire, we have a full detailed guide on hiring the right builder here.

FAQ: Common questions about home extensions in Johnstone

Can an extension builder in Johnstone help with planning permission?

Yes, many extension builders in Johnstone can guide you through the planning process. They can help prepare drawings, advise on local requirements, and liaise with your local council to ensure your project meets all necessary regulations.

Can an extension builder in Johnstone handle everything from design to construction?

Many Johnstone extension builders offer full design-and-build services, managing both the architectural planning and construction stages. Ask your builder whether they can provide a complete package or if you’ll need to hire an architect or designer separately.

Will an extension builder in Johnstone help with materials and finishes?

Yes, most extension builders in Johnstone can source materials and offer advice on finishes that suit your design and budget. You can also choose to supply certain materials yourself, just make sure this is agreed upon before work starts.