Extension builders in Treharris

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

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Some of our top rated extension builders in Treharris

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S W Rendering ltd
No reviews yet
Extension Builder in Treharris
We are a building company that supply Bricklayers and Renderers to the local and national main contractors for small to large scale contracts. We also undertake residential & commercial smaller scale projects, extensions, alterations, etc. We meet all CDM Regulations revised in 2015 and are accredited with CHAS.
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bogdan
No reviews yet
Extension Builder in Treharris
Builders
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JCB Maintenance & DIY
No reviews yet
Extension Builder in Treharris
Reliable Handyman Services for Every Job — Big or Small Need a trustworthy pair of hands to tackle those jobs around the home or office? Our Handyman Service provides high‑quality, hassle‑free solutions for a wide range of tasks. Whether it’s installing a new TV, laying beautiful flooring, or assembling flatpack furniture, we deliver skilled workmanship with a friendly, reliable approach. What We Do: TV Installation: Safe and secure mounting, cable tidying, and setup so your entertainment area looks clean and professional. Flooring Installation: Expert laying of laminate, vinyl, and other flooring types with a precise finish that transforms your space. Flatpack Assembly: From wardrobes and desks to beds and shelving units — we build it quickly and correctly, without the stress. General Repairs & Home Improvements: Shelving, small carpentry, minor repairs, and more — consider us your go‑to for keeping your home in perfect shape. We pride ourselves on reliability, clear communication, and top‑quality workmanship. No job is too small — just tell us what you need, and we’ll take care of the rest.
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Hc builders
No reviews yet
Extension Builder in Treharris
Hello my name is Harry, I am a self employed builder with experience in bricklaying, plastering, rendering, painting and decorating and landscaping I’ve been in my trade for 15 years and during this time I have worked on various sizes of site from peoples gardens to sites with up to 800 homes
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Cobb Bricklaying
No reviews yet
Extension Builder in Treharris
General builder that specialises in extensions patios and renovations. We take on all aspects of work and complete to a high standard. We are fair, honest and upfront with pricing and job timescales. We believe in working with customers to realise the visions they have.
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Parkside Professional Services
Rating: 5 out of 5
Extension Builder in Treharris
We carry out any building or construction works. We are SIKA approved contractors. We can complete concrete repairs. Crack resin injections. Waterproofing or Tanking works. We are Safecontractor, CHAS, Constructionline, Trading Standards Approved
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Latest review:
Damp Proofing- 9 Sep 2024
Matthew took the the time to come and have a look at the damp issues we were having and give us plenty of advice on how we can resolve it ourselves without spending the thousands we had previously been quoted by other companies. Would definitely recommend and will be contacting him for any future jobs we may have!
Ty Parc Construction limited
No reviews yet
Extension Builder in Treharris
"Welcome to Ty Parc Construction! We specialize in new builds, renovations, and commercial projects. Our commitment to quality, attention to detail, and client satisfaction sets us apart. We look forward to exceeding your expectations. Thank you for considering us for your construction needs."
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Edward cotterill
No reviews yet
Extension Builder in Treharris
Carpentry - internal/External (Fences + Garden structures Bricklaying - extensions, garden walls, patios, steps, concreting. Labour and groundwork’s.
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Paul Bartlett Building Services
No reviews yet
Extension Builder in Treharris
I am a general builder with over 30 years experience in the construction industry. I will happily quote for any size project with all types of work undertaken; brickwork and masonry, plastering, patios, driveways, carpentry, roofing, extensions etc. We are a small friendly, reliable team that will go the extra mile for our customers. Let us discuss your building needs and we will ensure every job is tailored to your requirements.
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Carpo’s Construction ltd
No reviews yet
Extension Builder in Treharris
ABOUT US: With 32 years of experience in plastering and drylining, Carpo’s Construction Ltd is committed to delivering top-quality craftsmanship and exceptional customer service. As seasoned builders with 25 years in the trade, we treat each of our clients like family, ensuring they receive 100% dedication and care. OUR PROMISE: Clear Communication: We keep you informed at every stage of the project, ensuring that you are always in control and comfortable in your home. PROFFESIONAL WORK ETHIC: We pride ourselves on maintaining a clean and organized work environment, making cleanliness a priority throughout the day. RELIABILITY: Our team is dependable and committed to completing your project on time, meeting your needs with precision and care. TOP-NOTCH QUALITY: We strive for excellence in every job, ensuring a superior finish that meets and exceeds your expectations. Choose Carpo’s for a seamless, professional experience where your satisfaction is our ultimate goal.
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Mike Guest Electrical Plumbing Building
Rating: 4 out of 5
Extension Builder in Treharris
Electrical work 18th edition registered Contractor All plumbing work Extensions building repairs and renovations New builds My own architect Roofing and painting
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Latest review:
Bathroom Fitting- 18 Feb 2026
Excellent work from Mike and his team. They kept me informed throughout with regular progress updates and pictures, which I really appreciated. They pay close attention to detail and do the job right rather than cutting corners. As a landlord, I was able to stay completely hands-off and let them get on with it. No chasing for updates or wondering if they'd show up – they were reliable and professional throughout. They started early each day, put in a full day's work, and left everything neat and clean. Would recommend and use them again in future.
JHJ Building Contractors
Rating: 5 out of 5
Extension Builder in Treharris
JHJ Building Contractors is a fully insured construction contractor with over 20 years of industry experience, delivering high quality building and construction services across South Wales. We undertake residential, commercial and public-sector projects, including new builds, extensions, refurbishment, brickwork, substructures, groundwork, repairs and maintenance. Working with private clients, housing providers, main contractors and civil engineering companies, we pride ourselves on quality workmanship, safe working practices, reliability and professional project delivery from start to finish. Check out our webpage for more info. •New builds •Extensions •Renovations •Building refurbishment •Conservatories •Substructure •Garage conversions •Maintenance and repair service
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Latest review:
Extensions- 20 Jun 2026
I can’t rate Justin and his team enough. They turned up when they said and completed the work within the time he said. His work is very clean and neat. And they went above and beyond to get our project back on track after other delays in the build. I will be using JHJ building on future projects. It was a pleasure to deal with such competent trades men and very approachable if we had any questions. Highly recommended
Angelo Colarusso
No reviews yet
Extension Builder in Treharris
I am an extremly fussy and meticulous builder with over 40 years in the building trade having built houses satisfied the local authorities when Grant works needed competent and proficient builders with a wide and varied field of experience at present I am completing a garage conversion and extention which has more than met my customers needs. I wish to progress my company with your help this why I am applying to your your goodselves.
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WJB General Building & Roofing
No reviews yet
Extension Builder in Treharris
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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I.taylor carpentry and building
No reviews yet
Extension Builder in Treharris
We are building company who can take on a range of construction, maintenance landscapeing etc. We have over 10 years experience in the trade.
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creative construction ltd
No reviews yet
Extension Builder in Treharris
I’ve spent 10 years as a new house site manager and have overseen hundreds of new build house constructions. I was originally a bricklayer and have spent the last year or so focusing on my own company completing new garden landscapes, summer houses, extensions and complete rebuilds. with all new companies all work is welcome and we will quote any works no matter how small.
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Top rated Extension Builders

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

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

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

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

What are the hourly rates of extension builders in Treharris?

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

Find extension builders in Treharris with MyBuilder

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

Step 2: Compare different extension builders in Treharris

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

Step 3: Hire Treharris extension builders with confidence

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

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

What to ask a Treharris extension builder before hiring?

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

An extension builder in Treharris 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 Treharris 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 Treharris?

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 Treharris 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 Treharris 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 Treharris

Can an extension builder in Treharris help with planning permission?

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

Many Treharris 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 Treharris help with materials and finishes?

Yes, most extension builders in Treharris 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.