Extension Builders in Penarth

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 5 (2 reviews)

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Some of our top rated extension builders in Penarth

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FixiClean
Rating: 4.7 out of 5
Extension Builder in Penarth
Currently fully booked for bathrooms until July 2026. Hi, I’m Dewi. I run a design-led, client-focused building and project management service covering South East Wales and Bristol. We’re a small, reliable team known for good ideas, clear communication, and delivering well-managed projects from start to finish. Specialist in: • Bathrooms (design-led, full refurb or part upgrades) • Extensions & garage conversions • Knock-throughs & structural alterations • Steel work / RSJ installations • Small project works on a transparent day-rate basis Alongside this, we also take on commercial maintenance, call-out plumbing, and roofing (with our partnered roofing team). If you’re looking for a team that combines solid craftsmanship with proper design thinking and smooth project management, that’s exactly what we do.
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Latest review:
Plumbing- 17 Dec 2025
I am pleased with the work carried out by Dewi and Dan. Dewi clearly knows what he is talking about and the work was carried out professionally and to a good standard. I will use again in future.
Dan magor carpentry
Rating: 5 out of 5
Extension Builder in Penarth
Full qualified carpenter of 9 years I pride myself on my attention to detail with any job i carry out. I aim to provide a high quality standard work at very competitive rate and to give customers a hassle free service.
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Latest review:
Joinery & Cabinet Making- 15 May 2024
Fantastic work by Dan and great customer service
Cleverly associates ltd
Rating: 4.9 out of 5
Extension Builder in Penarth
We are a long established family owned and run Limited company. With over 35 years experience in the building trade. We pride ourselves in our hassle free, open, honest approach where we believe we offer a competitive, professional, reliable service which is second to none.
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Latest review:
Extensions- 27 Jul 2018
CAL provided a competitive quote and completed the work quickly and to schedule. Additional works pushed the cost over budget but these were detailed in the invoicing. Messy at times but generally a punctual and professional service, able to recommend and worth including in your search for contractors.
Joe Ward electrical services
No reviews yet
Extension Builder in Penarth
I will cover all construction and electrical work and will be offering ev and pv installs by the end the year, I have a great team behind me and we will make sure all customers are happy with the work before leaving
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S. M. Vaughan
No reviews yet
Extension Builder in Penarth
General construction , extensions kitchens bathrooms heating and plumbing we have been in the construction industry for forty years ,we are punctual , professional and take great pride in all our work
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Lmj Build
Rating: 5 out of 5
Extension Builder in Penarth
We are specialist bricklaying and construction company based in Cardiff operating accoss South Wales. We have over 16 years of experience in the construction industry and provide skilled, high quality workmanship to complete your desired project. These are the list of services we provide at LMJ Brickwork and build. • New builds • Extensions • Garden and boundary walls • Retaining walls • Brick slips installation (interior and exterior) • Foundations • Steel work and knock throughs • Repairs • Restorations • Repointing
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Latest review:
Bricklaying- 9 Dec 2025
Good
Bondstone Construction Limited
Rating: 5 out of 5
Extension Builder in Penarth
Welcome to Bondstone Construction – Your Trusted Handyman Services Need help with repairs, maintenance, or home improvement projects? Look no further! At Bondstone, we provide reliable, affordable, and high-quality handyman services tailored to meet your needs. Whether it's assembling furniture, putting up shelves, TV's and curtain poles or tackling a long-overdue to-do list, our skilled professionals are here to help. No job is too small—we’re here to make your life easier, one repair at a time.
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Latest review:
Complete new Bathroom, Kitchen, and WC in the house plus decoration of the Hall. Outside a resin drive and paths around the complete property, new patios, wall repairs and new lawn. Rupert is very professional and schedules of work were agreed, costed and delivered to timescales. His standard of workmanship and attention to detail are excellent and he is completely trustworthy working at the property without us. We would have no hesitation in recommending him.
A B plastering and building
Rating: 4 out of 5
Extension Builder in Penarth
i have been in the building industry all my life and have a wide range of jobs to go in my portfolio I am a vetted member of Which? Trusted Trader. And have 8 years of 10 out of 10 reviews on checkatrade
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Latest review:
I HIRED ANDY TO RENDER SIDE & BACK OF MY HOUSE. THE PRICE WAS FAIR . ALL STARTED WELL , IS LABOUR DAVE WAS VERY HARD WORKING DOING MOST OF THE WORK. WHEN ANDY TURNED UP TO PUT THE COATS OF RENDER ON THE BACK , THERE WAS AFEW MISSES & A WAVE GOING FROM ON END TO THE OTHER. WHEN HE DONE SIDE WALL AGAIN THERE WAS MISSES , NOT ONLY THAT BUT THROUGH OUT HE LEFT THE PLACE UNTIDY . DID NOT PUT THE DOWN PIPE BACK ,DID NOT REPLACED THE BROCKEN TILES , DID NOT REPLACE BROCKEN STEP, DID NOT PUT THIRD COAT ONE LIKE HE SAID HE WOULD . AFTER TELLING ANDY ABOUT ALL THE SAID ABOVE, IS REPLY WAS IT WILL COST ME TO PUT IT RIGHT. SO MUCH FOR THE AGREED PRICE FOR THE WORK UNDERTAKEN. NOT VERY HAPPY BECAUSE IT COST ME MORE MONEY TO GET A NOTHER BUILDER IN TO FIX IS MESS , WOULD NOT RECOMMED HIM.
BGPLASTERING
Rating: 3.8 out of 5
Extension Builder in Penarth
Bgplastering has over 10 years experience in plastering and rendering . Take pride in taking our customers jobs on making sure we leave them with a good job . Clean friendly and reliable we take on all plastering and rendering jobs
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Latest review:
Plastering- 27 May 2025
**DO NOT USE – Unreliable and Unprofessional** I had Ben (BGplastering) booked in for the week commencing 19th May—this had been in the calendar for two months. I followed up multiple times to confirm the booking, and although a delay in response, I was reassured everything was still on track. On the 18th May, just a day before the scheduled start, I reached out again and was suddenly told he couldn’t make it due to a toe operation. He then rescheduled for the following week (starting 26th May). I followed up again on the 25th and was told it would now be the 27th. Yet again, another delay. It’s now the morning of the 27th. No sign of him. I messaged and called, and finally received a text at 11am saying his van wouldn’t start. I replied politely with “no worries, these things happen, keep me updated” – only to find out the message wouldn’t deliver… A complete waste of time. Avoid!
Rena
No reviews yet
Extension Builder in Penarth
Cardiff and vale based builder specialising in new builds, extensions & loft conversions.
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Orange stone construction
Rating: 5 out of 5
Extension Builder in Penarth
Orange Stone Construction Ltd is known in the local area for providing a wide range of expert house extension and new build solutions. We will use top-quality materials and equipment to assist us on every project, ensuring we deliver only the best possible results for our clients. Regardless of your project size, you can always rely on our team to get the job done! We strive to complete each job efficiently and offer assistance whenever you need it.
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Latest review:
Conversions - General- 23 Jun 2025
James and his guys were very good. Started when they said and done a really good done in the timescales estimated. Would recommend to anyone 👍
Priority Carpentry and Building
Rating: 5 out of 5
Extension Builder in Penarth
An established business offering all aspects of carpentry & general maintenance in the Cardiff and South Wales area we are a professional,reliable and friendly service. All of our work is carried out to the highest standard by fully qualified carpenters and builders and all work is fully guaranteed.
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Latest review:
Carpentry- 25 Mar 2018
Job was to replace bowing joists and level ceiling, responded very quick and would defiantly hire again
Matthew Davies
Rating: 4.5 out of 5
Extension Builder in Penarth
I’m Matthew based in the Vale of Glamorgan. I work anywhere in the Vale, Cardiff & Bridgend & will travel further for the right job. I’ve been a bricklayer for 20 yrs & have worked for most major homebuilders, on large commercial builds, small private jobs & everything between. I’m most passionate about private projects that will increase a customer’s enjoyment of their home, whether that be an extension, outbuildings, outdoor kitchen, garden walls, pathways, steps and patios.
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Latest review:
Bricklaying- 26 Mar 2026
Fantastic , friendly hard worker great job building block work
WJB General Building & Roofing
No reviews yet
Extension Builder in Penarth
WJB General Building & Roofing have over 18 years experience in the building trade. We are known for our high quality, professional and value for money work. With our 5 star rating - we're sure we can help you achieve the home of your dreams.
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Thomas westall contractor
No reviews yet
Extension Builder in Penarth
Hi there I’m a one/two man team who has 10 years experience in property maintenance and 5 years in commercial tiling/shop fitting/ bricklaying. Cscs reg. all aspect of building work undertaken with free quotes.
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S.m. Property services
Rating: 5 out of 5
Extension Builder in Penarth
After working for 23 years in the construction trade working for big companies I have now set up on my own, I have a lot of experience and feel I’m very competitively priced . I have worked on residential and business properties aswell as local authority work . Being new to my build I’m keen to build up my online clients and positive feedback. Please get in touch for a no obligation quote .
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Latest review:
Conversions - General- 7 Feb 2025
Stephen and his Team were utterly professional, their work was faultless and we couldn't be happy with the job. We had a wall removed in the kitchen which needed a support putting in, and a wall removed in the bathroom and a doorway sealed up. Right from my initial contact with Stephen we got got a good feeling, his quote was the most competitive but we had already decided to go with Stephen anyway as his experience, expertise and integrity were obvious as talked us through the job and what would be required. Their work was fast and to a great standard. We were very impressed with how clean Stephen and his Team managed to keep the house throughout all the work (especially as we have black mortar in the walls), they cleaned up throughly every evening and it made life so much easier on us.

Top rated Extension Builders

Our Extension Builders in Penarth, are rated 5 out of 5 based on 2 reviews from customers like you.

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

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 Penarth 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 Penarth who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Penarth?

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

Find extension builders in Penarth with MyBuilder

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

Step 2: Compare different extension builders in Penarth

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

Step 3: Hire Penarth extension builders with confidence

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

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

What to ask a Penarth extension builder before hiring?

Before hiring an extension builder in Penarth or extension building company in Penarth, 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 Penarth?

An extension builder in Penarth 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 Penarth 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 Penarth?

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 Penarth 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 Penarth 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 Penarth

Can an extension builder in Penarth help with planning permission?

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

Many Penarth 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 Penarth help with materials and finishes?

Yes, most extension builders in Penarth 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.