Extension Builders in Bangor, Gwynedd

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Some of our top rated extension builders in Bangor, Gwynedd

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ARK PROperty Renovations
No reviews yet
Extension Builder in Bangor, Gwynedd
Qualified joiner level 3 and builder I’m 37 and been in the construction business since a young age working in my family business 6 years ago I came to wales to be closer to my son and recently iv gone on my own I’m very hard working and confident in everything I do my hands can put them selves to mostly everything that has ever been put to me
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aaron williams plastering
Rating: 5 out of 5
Extension Builder in Bangor, Gwynedd
my name is aaron, i am a NVQ qualified & time served plasterer, I completed my training in llandrillo college (rhos-on-sea). i have been plastering for over 15 years & have excellent knowledge in damp and woodworm, dry rot as i specialized in this for a number of years. many types of plastering such as rendering, (Krend) pebble dashing, moulding work, and all indoor skimming and boarding & prep work. I’m also Experienced in renovating properties to. i’m friendly ,honest ,clean and reliable
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Latest review:
Plastering- 26 Aug 2021
Aaron completed the rendering job promptly and fixed the door so we were very pleased and will contact again in the future. I would recommend
Sion Pritchard
Rating: 5 out of 5
Extension Builder in Bangor, Gwynedd
With over 20 years experience on everything from small extensions to new builds, and everything in between we can offer a quality service backed up by trusted sub contractors that we have been working with for years.
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Latest review:
Bricklaying- 11 May 2024
From start to finish Sion was very professional and very knowledgeable which was very helpful, in regard of how to repair and improve our garden patio. Sion replaced damaged bricks, created a new entrance to the patio and installed coping to the bricked wall. He also repointed the patio floor and added a new step.The finished result is of high standard and we love how it looks now. Sion worked tirelessly for two and a half days (in the heat ) and tidied up after, which we appreciated. We definitely recommend him and will definitely contact again. Diolch Sion
DA Building and Joinery
No reviews yet
Extension Builder in Bangor, Gwynedd
We at D A Building and Joinery carry out all aspects of building works and specialise in joinery. Our small team are fully certified and we work closely with local architects and building control on our larger projects. From design stage to project completion. There is no job to small either.
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Carlisle construction
No reviews yet
Extension Builder in Bangor, Gwynedd
Carlisle Construction is a trusted name in the industry, bringing over 30 years of experience to every project we undertake. Known for our commitment to quality, integrity, and craftsmanship, we specialize in delivering reliable construction solutions tailored to meet the unique needs of each client. Whether it’s residential, commercial, or renovation work, our skilled team ensures every job is completed on time, on budget, and to the highest standards. At Carlisle Construction, your vision is built to last.
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David Turnbull
No reviews yet
Extension Builder in Bangor, Gwynedd
D Turnbull Bespoke Joinery & Construction…is a professional joinery company delivering high-quality bespoke woodwork for residential and commercial projects across the UK. We specialise in all aspects of joinery and construction. Combining traditional craftsmanship with modern techniques, we produce joinery that is durable, precise, and finished to a high standard. We work closely with homeowners, architects, and contractors to ensure each project is carefully planned, well executed, and completed on time. With a strong focus on quality, reliability, and attention to detail
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I W Jones Adeiladwr - Building Contractor
No reviews yet
Extension Builder in Bangor, Gwynedd
I am a fully qualified plasterer and bricklayer with over 25 years of experience in the building trade. I specialise in extensions, renovations, and all aspects of general building work, delivering high-quality craftsmanship on every project. My expertise includes extensions, plastering, silicone rendering, micro-cement, and Venetian plastering. I also specialise in installing complete wet rooms and bathrooms, ensuring a flawless, modern finish. With a strong reputation for reliability, professionalism, and attention to detail, I take pride in providing a trustworthy, efficient, and cost-effective service. Whether you’re looking for a home extension, expert plastering, or a high-end bathroom transformation, I offer tailored solutions to meet your needs. No job is too big or small—I’m happy to discuss your project and offer expert advice. Get in touch for a free quote
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Andrew Garlick
No reviews yet
Extension Builder in Bangor, Gwynedd
37 years old, been a bricklayer since finished school, experience and knowledge i have loads of, been on buildings sites on a price most of my career. Do loads of landscaping and patios etc
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NW Building Services Ltd
New on MyBuilder
Extension Builder in Bangor, Gwynedd
NW Building Services Ltd is a North Wales based building services contractor delivering high-quality electrical, fire protection, heating, renewable energy, building and restoration projects for residential and commercial clients. As part of NW Services Group Ltd, we combine multiple specialist divisions under one contractor, allowing us to manage projects efficiently while maintaining high technical standards and compliance across all trades. Our team brings extensive experience across electrical installations, fire alarm systems, heating systems, renewable technologies, as well as building and property restoration works. Whether undertaking refurbishments, system upgrades, compliance works, restoration projects or new installations, we focus on delivering reliable workmanship, clear communication and professional service from start to finish. We take pride in our attention to detail, safety standards and commitment to completing projects on time and within budget. Based in North Wales, we cover Conwy, Gwynedd, Anglesey, Denbighshire and surrounding areas. Services include electrical installations, fire alarms, heating systems, renewables, building works, restoration projects, refurbishments and compliance works.
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Rag Construction
No reviews yet
Extension Builder in Bangor, Gwynedd
Hard working honest, with quality work
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TG Glazing and Flat Roofing
No reviews yet
Extension Builder in Bangor, Gwynedd
- Based in Anglesey and covering North Wales. - We specialise in flat roofing, roof lanterns, double-glazing windows and doors, conservatories, porches, fascias, soffits, and guttering. - All work guaranteed. - Fluent in Welsh and English, we provide reliable, professional service for all your home improvements.
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D O ROBERTS BUILDERS
Rating: 5 out of 5
Extension Builder in Bangor, Gwynedd
We are a family run business and have a vast 65 years experience within the building industry.We have been members of the FMB for many years now and have gained awards for the standard of our work.We have predominantly worked on old farm and barn conversions over the last 15 years we undertake all aspects of building and joinery and offer all trades.we pride ourselves on honest hardworking ethics and punctuality and transparency is key.
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Latest review:
Extensions- 30 Jun 2019
Dafydd came out and quoted the job straight away. He has done a fantastic job and went over and above what we expected. He even tidied up some of the hall paintwork and skirtings for us. We had a very old extension which leaked and was poorly built. The extension Dafydd has built is now not only watertight, but looks amazing! And has a lovely light shaft which really brightens it up. Very high standard of work. VERY pleased and would highly recommend him.
AJ Building Services Anglesey
No reviews yet
Extension Builder in Bangor, Gwynedd
We are a family run business with over 50 years of experience in the industry. We offer building services for small repairs / home improvements to high quality renovations / extensions and new build projects. Call or message for a free quote.
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C.M.Williams joinery & building contractor
No reviews yet
Extension Builder in Bangor, Gwynedd
Hi my name is Carwyn Mon Williams,im a joiner by trade..but have learnt building work over the years as i have been in the trade for over 14 years! i have a close knit group of tradesmen i use so that i can carry out the full package. From a simple repair to a full new build etc..i pride myself on keeping my customers happy & always carrying out work to the highest standard!
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AJ Building Contractors Anglesey Ltd
No reviews yet
Extension Builder in Bangor, Gwynedd
AJ Building Contractors Anglesey Ltd is a family run buisness with over 50 years experiance in the construction industry. We have expertise in both construction management and carrying out various types of projects from small scale alterations to whole extensions or new build properties.
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njt builders
Rating: 5 out of 5
Extension Builder in Bangor, Gwynedd
From design to compleation,we take care of it all. Over 35 years of experience in the building industry.
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Latest review:
Plastering- 7 Aug 2025
Nigel and his team came and completed the job with ease they were on time very clean and the work was outstanding would recommend to anyone Thanks

What types of services are offered by local extension builders in Bangor, Gwynedd?

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 Bangor, Gwynedd 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 Bangor, Gwynedd who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Bangor, Gwynedd?

Before getting started with your extension project, it’s important to have a clear budget in place. On average, extension builders in Bangor, Gwynedd 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 Bangor, Gwynedd extension builders near you on MyBuilder. This allows you to compare what each quote covers and how much your Bangor, Gwynedd home extension project is likely to cost.

Find extension builders in Bangor, Gwynedd with MyBuilder

Hiring the right extension builder in Bangor, Gwynedd 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 Bangor, Gwynedd extension builders. Once your job is live, we’ll share it with home extension builders in Bangor, Gwynedd who can express their interest.

Step 2: Compare different extension builders in Bangor, Gwynedd

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

Step 3: Hire Bangor, Gwynedd extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Bangor, Gwynedd, 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.

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

What to ask a Bangor, Gwynedd extension builder before hiring?

Before hiring an extension builder in Bangor, Gwynedd or extension building company in Bangor, Gwynedd, 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 Bangor, Gwynedd?

An extension builder in Bangor, Gwynedd 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 Bangor, Gwynedd 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 Bangor, Gwynedd?

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 Bangor, Gwynedd 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 Bangor, Gwynedd 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 Bangor, Gwynedd

Can an extension builder in Bangor, Gwynedd help with planning permission?

Yes, many extension builders in Bangor, Gwynedd 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 Bangor, Gwynedd handle everything from design to construction?

Many Bangor, Gwynedd 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 Bangor, Gwynedd help with materials and finishes?

Yes, most extension builders in Bangor, Gwynedd 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.