Extension Builders in Swansea

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 5 (3 reviews)

Easily find verified Swansea Extension Builders. Just post your job to get quotes from MyBuilder's Extension Builders in Swansea.

Select a service

How it works

Post your job for free

Tell us about your job, and we’ll alert suitable tradespeople in your area. It’s simple and free.

Tradespeople respond

Once your job is posted, you’ll get responses from interested tradespeople through the website.

Review profiles and choose

Browse profiles, work history, and feedback, then choose who you wish to share your details with.

Some of our top rated extension builders in Swansea

228 Results

Sort by:

Quantas Construction LTD
Rating: 5 out of 5
Extension Builder in Swansea
Hello, We are a highly experienced and skilled with City and Guilds qualified time served, we have a combined total of 30 years experience in the building trade, we strive on attention to detail making sure the job is spotless at all times with good time keeping and most importantly making sure the customer is 100% happy with the work carried out. So look no further we are the company for you. Est 2016
Get in touch
Latest review:
Restoration & Refurbishment- 4 Jan 2019
Extremely professional, friendly and approachable also the communication was great from start to finish. Both Richard and his partner Owen fitted my kitchen and flooring to a very high standard and went above and beyond to give an all round lovely finish whilst keeping the house clean and tidy.
Griffiths Carpentry & Joinery
Rating: 1 out of 5
Extension Builder in Swansea
Construction company based in Swansea, who specialise in Bespoke Carpentry, Extensions and Kitchens throughout South Wales.
Get in touch
Latest review:
Carpentry- 16 May 2016
Obtained 3 quotes and selected Nathan after he visited the site and reviewed work and had conversation. Waited 2 weeks for him to become available and on first day contacted me to say he was pulling off the job. Apparently the door frames of this 1920's house required him to do much remedial work to get them square - primarily Nathan blàmed the plasterer who had overboarded the walls. Walls were passed for payment by two separate surveyors with over 80 years experience of the contruction industry. While it is accepted there were remedial efforts to make the frames square, this is to be expected on a house of this age - and perhaps this is where Nathan lacks experience. If Nathan had wanted to outline additional work and additional money this was open to negotiation - the most unprofessional thing is to turn up on the day of work starting and say you don't have time to do any additional work - especially as the job had been viewed before the work commenced. Didn't want to damage his reputation by providing "sub-standard work", but seemingly oblivious to the reputational damage of letting a customer down at the last minute. I have my doubts as to whether Nathan has the skills to work on houses of this age.
M Gilley Plastering & Drylining
Rating: 5 out of 5
Extension Builder in Swansea
I have been a plasterer for 30 years & have a lot of experience in new builds & refurbishment of old propertys. I also do a variety of building work such as building extensions flat roofs & so on Below are just a couple of photos. I am very reliable & all work is to a high standard.why not give us a go.
Get in touch
Latest review:
Plastering- 26 Apr 2018
Superb work, no messing about, gets on with the job. Lovely manner with people. We couldn’t have been more pleased. After being messed about by a cowboy builder he came and saved the day and finished our building. I would recommend to anyone. Fantastic work and reasonable. You would have no worries hiring Martin. Hes reliable, hard working and punctual. I personally wouldn’t look anywhere else.
Mortar Life Building Services
No reviews yet
Extension Builder in Swansea
Need a reliable builder? We’ve got you covered. We take on all types of building work, from small jobs to full renovations, covering the south Wales area, based just outside of Swansea. • Honest, reliable service • Honest prices • Quality workmanship • Over 15 years experience • Free quotes with no pressure Send us a message or give us a call to talk about your project.
Get in touch
haven carpentry and building
No reviews yet
Extension Builder in Swansea
I have thirty years experience in the building industry. Having under taken my own projects and also project managing for several architects in the Swansea area.We pride ourselves on quality of workmanship,efficiency and value for money.We can offer many recommendations from our satisfied customers.
Get in touch
D G Carpentry
Rating: 4.8 out of 5
Extension Builder in Swansea
I’m a carpenter with 28 years experience in the construction industry i specialise in kitchen and bathroom refurbs and all other carpentry work
Get in touch
Latest review:
Carpentry- 27 Jan 2025
Damian did a fantastic job fitting a staircase kit at our property. It was a bit of a nightmare job in the end due to weather, power cuts and the removal of the original staircase, however this service was top notch and he did a fantastic job. We are very happy with the work he has completed and will certainly be in touch when we need more carpentry work.
K2 Contracts
Rating: 4.9 out of 5
Extension Builder in Swansea
High quality design and build from planning to completion Project management service Bespoke architectural design Considerate construction methods Large contracts undertaken . All internal/ external plastering and alterations Lime plastering internal external
Get in touch
Latest review:
Bricklaying- 31 Oct 2025
Came out next day to view and price the job. Very knowledgeable and explained everything in detail about the job. Completed in a week and excellent job done, no mess all cleared away. Will certainly be using k2 contracts again and have already recommended to friends and family.
RCL Construction ltd
Rating: 4.7 out of 5
Extension Builder in Swansea
RCL Construction ltd are a family run Buisiness that believe customer relations and satisfaction are a number one priority. We have been completing all building projects from start to finish to the highest possible standards for over 20 years. Let us take the stress of your building project off your shoulders and make your dream build come to reality.
Get in touch
Latest review:
Landscaping- 21 May 2026
Craig and his guys did a brillant job laying my patio , great job done will be having them back to do other jobs thanks Craig
Lakes general builders
No reviews yet
Extension Builder in Swansea
Family business with15 years in construction. Subcontractors to leeks department stores building bases for their conservatories. We build extensions garages do renovation work we also pride ourselves in our patio decking and fencing work. References can be supplied from our loyal and growing customer base. Please have a look at some of my work in the gallery.
Get in touch
JP building and roofing contractors
Rating: 3 out of 5
Extension Builder in Swansea
With more than 10years in the construction industry we can offer all General building and roofing work serving the South Wales area. Specialising in new builds, extension, renovations and barn conversion.
Get in touch
Latest review:
Restoration & Refurbishment- 13 Aug 2020
We could not have chosen better. Jamie and his team are absolutely fantastic. Reliable, trustworthy, with good attention to detail and great communication skills. Jamie persevered all the way through the pandemic, sourcing materials which were hard to find. Really excellent: cannot recommend highly enough
K&A Construction
No reviews yet
Extension Builder in Swansea
We are a team of sole traders who undertake a wide variety of work which includes all masonry and all carpentry. We are three master masons of which with nearly 90 years experience between us And a master carpenter and a young carpenter. Between us we have completed a wide array of projects all over South Wales and England over the years. As masonry and carpentry specialists we specialise in all brick block and stone work and all woodwork and ironmongery.
Get in touch
R W Langford Builders Ltd
Rating: 4.7 out of 5
Extension Builder in Swansea
R W Langford Builders are a family run business that offer a friendly and reliable service and believe customer relations and satisfaction is a top priority. We can complete any building job from start to finish making it a stress free experience for our clients. All work is fully guaranteed and completed to the highest standard.
Get in touch
Latest review:
Extensions- 25 Jan 2025
Overall the job was fine. But noted a couple of issues after completion ,(and payment) but despite several notifications to the contractor, they never returned to correct the issues, and stopped responding. Very disappointed with their professionalism
T&E Groundworks
Rating: 4 out of 5
Extension Builder in Swansea
Hi I'm Tom, I am a Groundworker by trade. I specialise in groundworks, fencing, landscape gardening and bricklaying. At 16 I began renovating everything from old barn conversions to modern properties. Since then I have been a self employed groundworker working on property developments, doing everything from the deep drainage and roads to laying the last slabs around the finished plots (houses). I have now set up our small family run business and are currently trying to build a custom base. Please feel free to call at any time for a free quote.
Get in touch
Latest review:
Groundwork & Foundations- 26 Feb 2025
Amazing job. Thank you very much for your help prior to the job being done. Highly recommended and would have back anytime.
M R Brickwork
No reviews yet
Extension Builder in Swansea
Bricklayer with 10+years experience in new builds, extensions, walls and patios. Available for work in and around South Wales. I take pride in my work and offer very competitive prices. Recent projects include block of 15 flats, 18 flats with retail store underneath and bungalows, houses and garden walls
Get in touch
M.G bricklaying & landscaping
Rating: 5 out of 5
Extension Builder in Swansea
Mg building and landscaping Extensions/conservatory/orangeries/patios porcelain/roofing/and general building work 20 years experience
Get in touch
Latest review:
Extensions- 21 Aug 2024
We can’t thank Matthew and the team enough for the build. Great communication throughout and Matthew’s experience and suggestions were welcomed during the initial planning, allowing us to make informed decisions on the final product. Where obstacles were met, they were dealt with swiftly allowing for a much less stressful experience. Our home is now perfect for our growing family as we are able to utilize so much more space.
Miggis Carpentry and Building
Rating: 5 out of 5
Extension Builder in Swansea
Hello my name is Paul, I carry out all aspects of carpentry and building always to a high standard. I have 14 years experience myself and slowly growing my company having my own qualified tradesmen working for me. I provide a free no obligation quote.
Get in touch
Latest review:
Decking- 5 Jun 2020
Would highly recommend Paul his work is second to none . From him coming to view the job ,the promptness of the quote to the finished product . He arrived early every morning worked until late he is meticulous and takes pride in his work ,cleaned up and left no mess. Also a lovely personality and easy to work with . Looking forward to entertaining on my beautiful decked area . Thanks Paul you've done a fantastic job I'm really grateful .

Top rated Extension Builders

Our Extension Builders in Swansea, are rated 5 out of 5 based on 3 reviews from customers like you.

Quality screening

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 Swansea?

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

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

What are the hourly rates of extension builders in Swansea?

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

Find extension builders in Swansea with MyBuilder

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

Step 2: Compare different extension builders in Swansea

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

Step 3: Hire Swansea extension builders with confidence

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

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

What to ask a Swansea extension builder before hiring?

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

An extension builder in Swansea 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 Swansea 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 Swansea?

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 Swansea 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 Swansea 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 Swansea

Can an extension builder in Swansea help with planning permission?

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

Many Swansea 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 Swansea help with materials and finishes?

Yes, most extension builders in Swansea 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.