Extension Builders in Mitcham

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (22 reviews)

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

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 Mitcham

3173 Results

Sort by:

jc_electrical
Rating: 5 out of 5
Extension Builder in Mitcham
We are a construction company with years of experience in all aspects ranging from groundwork, carpentry, extensions and many more. We pride ourselves on delivering a high quality finish.
Get in touch
Latest review:
Landscaping- 20 May 2026
Very pleased. Responsive and did a good job
UNDERWAY CONSTRUCTION LTD
Rating: 5 out of 5
Extension Builder in Mitcham
Here at Underway Construction we cover all aspects of building from extensions, conversions and refurbishments to decking, oak framing and hanging doors. Specialising in first and second fix carpentry with over 10 years experience we work alongside architects and engineers to ensure our clients are always provided a professional and reliable service.
Get in touch
Latest review:
Carpentry- 3 Jul 2023
Henry did a great job installing an internal door for us. Good quality job, kept everything clean and tidy, and smooth communication.
creative solutions 4 you limited
Rating: 5 out of 5
Extension Builder in Mitcham
a small building and restoration company, a builder with over 20 years of experience, we take proud of our projects building a good relationship with our clients.
Get in touch
Latest review:
Bathroom Fitting- 10 Nov 2020
William and his team were very good and installed an entirely new shower cubicle in place on an existing cupboard in a bathroom with previously only a WC and sink. I am delighted with the result and will be using William and his team again for other projects across my rental portfolio.
Home improvement
Rating: 4.5 out of 5
Extension Builder in Mitcham
“Reliable handyman with 7+ years of experience in flooring, plastering, and general home repairs. I take pride in clean work, clear communication, and finishing jobs on time. Available for small to medium projects — no job too and general plumbing
Get in touch
Latest review:
Handyman- 15 Aug 2026
They were hired to build a Wendy house with instructions and complained about the instructions, said it was a lot of work and didn’t complete the roof properly. It would have been better if they said they never did it before or said they didn’t understand the instructions. Overall poor communication and overcharged
D&M Property Services
Rating: 5 out of 5
Extension Builder in Mitcham
13 years experience in south east and south west London.
Get in touch
Latest review:
Carpentry- 2 Apr 2017
Completed a larger job of installing French doors for me. Did a great job and very fast. Very hard working and a great finished product. I would without question use again and happy to recommend
Gesti
Rating: 5 out of 5
Extension Builder in Mitcham
Hi, At GESTI RENOVATIONS we specialise in all types of building works, from small repairs to full renovations, loft conversions & extensions. Get in touch for a free no obligation quote.
Get in touch
Latest review:
Plastering- 14 Nov 2024
Very happy with the work Gesti did for us. We just brought our first home and the ceiling honestly wasn’t looking the best. Lots of cracks and slightly warping. Gesti was able to come in and secure all the cracks and plaster the entire ceiling for us. He did an amazing job. Will use him again I highly recommend. !!
Arthur's Building Service Ltd
Rating: 5 out of 5
Extension Builder in Mitcham
We are Arthur's Building Service LTD, based in Carshalton, Surrey. We provide a prompt, professional, experienced and friendly service covering loft & extensions, kitchens, bathrooms, & other building & decorating services for residential and commercial premises in South London and Surrey. We provide free quotes at times convenient for you. We truly value all our customers & are always available to discuss any aspect of your project and to help in any way we can.
Get in touch
Latest review:
Painting & Decorating- 24 Jan 2019
Valentin did a very good job at my place and he finished the tiling work as agreed in 2 days. I am happy with his work and would highly recommend him. Thanks, Subhash
Shemeck Builder
Rating: 5 out of 5
Extension Builder in Mitcham
We are a small team working in building industry for many years. We are experienced in all aspects of building like: Kitchen fitting, bathroom fitting, carpentry, tiling, plastering, painting and much more. Any project, any idea we can help you and you will be happy.
Get in touch
Latest review:
Bathroom Fitting- 26 Jun 2022
Excellent recent bathroom project delivered by Robert and Shemeck. Everything delivered on schedule. Very tidy and considerate of working in a family home. Competitive rate, great attention to detail, completely trustworthy. I'd recommend anyone to speak to them about your project.
Copperwhites
Rating: 5 out of 5
Extension Builder in Mitcham
Property refurbishment, New Kitchens/Bathrooms/Wet room installations.
Get in touch
Latest review:
Bathroom Fitting- 13 Aug 2018
Exceeded expectations with a stellar job! It was time for me to redo my cloakroom toilet. I had a clear idea in mind and already chose sanitary, tiles and most of the accessories; however I was unsure about few details such as lighting, external pipes, and how/where to add a small douche without taking away from the look I wanted. Derek quickly understood the brief, and instantly provided me with on the spot feedback and clever ideas and solutions, addressing all of my worries. After our chat, I knew he was the right person for the job. Derek was very communicative throughout the whole process and consistently went the extra mile to make sure every detail was spot-on! His craftsmanship is well above standards; he's meticulous and his problem solving skills are brilliant. Derek is also very personable, dedicated, and I was very impressed with his creativity and work ethic. I highly recommend his services, anyone needing some work done in their house would be lucky to have him.
All Aspects Group Ltd
Rating: 5 out of 5
Extension Builder in Mitcham
All Aspects Construction is a multi-disciplinary contractor who specialise in the construction, refurbishment and maintenance of commercial and domestic buildings. We focus on delivering the very best craftsmanship in all services delivered and a quality end product through sustainable construction all within an approachable and professional manner.
Get in touch
Latest review:
Painting & Decorating- 30 Apr 2019
Thoroughly recommend this Company, very professional, industrious, thorough, and exceptionally helpful, left the working areas clean and tidy, definitely value for money, delighted with the job of work carried out.
Ben the builder
Rating: 5 out of 5
Extension Builder in Mitcham
Extension Loft conversion Landscaping General building work
Get in touch
Latest review:
Benny and his team rebuilt our bungalow to our architect's design. Complete internal reconfiguration, refurbishment and insulation (internal and external), extension, new bathrooms, kitchen; detached garage, outbuilding and landscaping. His pricing was very fair. His work outstanding. Very reliable, utterly trustworthy, courteous, very helpful and professional. Answered our prayers and cannot be recommended highly enough
HJ Contractors Limited
Rating: 4.7 out of 5
Extension Builder in Mitcham
HJ is a small friendly local company. We take on all sizes of jobs from as little as hanging curtain poles to as big as extensions. HJ is made up of a team of people with the combined experience of 35+ years in the building trade. Our company goals are to supply high quality work at affordable prices and excellent customer service.
Get in touch
Latest review:
Handyman- 9 Sep 2018
Finished the job quickly. Will hire again.
GA Builds
Rating: 5 out of 5
Extension Builder in Mitcham
For half a decade, G&A Construction LTD has been at the forefront of redefining living experiences through our unwavering commitment to excellence in construction. As a premier provider of bespoke building solutions, we take pride in offering a comprehensive suite of services tailored to meet the diverse needs of our clients. From revitalizing tired interiors to expanding living spaces with loft conversions, our expertise spans the spectrum of home improvement. Our kitchen refurbishment services breathe new life into the heart of your home, while our bathroom refurbishment transforms ordinary washrooms into luxurious sanctuaries of relaxation. At G-A Build, we understand that the true beauty of a home lies in the details. That's why our painting and decorating services are executed with precision and finesse, ensuring every brushstroke reflects your unique style and personality. Our plastering and rendering expertise create smooth, flawless surfaces that serve as the perfect canvas for your design dreams to unfold. But our dedication to craftsmanship doesn't stop there. With our carpentry services, we bring timeless elegance and functionality to every corner of your home. Whether it's intricate woodwork or bespoke cabinetry, our skilled craftsmen deliver unparalleled quality and craftsmanship. Beyond aesthetics, we also specialize in restoring the structural integrity of your home. From brick cleaning and repair to repointing and stone restoration, our meticulous attention to detail ensures that your home stands the test of time, retaining its beauty and value for years to come. At G-A Build, our success is measured not only by the projects we complete but by the relationships we build along the way. For five years, we've been privileged to work with clients who trust us to bring their visions to life. As we embark on the next chapter of our journey, we remain steadfast in our commitment to excellence, innovation, and exceeding expectations every step of the way.
Get in touch
Latest review:
Gerti completely renovated both of our bathrooms, and the final results were absolutely amazing—exactly what we wanted. He was extremely flexible, offered valuable advice for other aspects of our home, and consistently went above and beyond. Having done a lot of work on our house, we can confidently say he is the best builder we’ve worked with. His pricing was very reasonable, and we will definitely use him for future projects.
Safeway Build Ltd
Rating: 5 out of 5
Extension Builder in Mitcham
At Safeway Build Ltd, we pride ourselves on delivering exceptional craftsmanship and reliable service in every project we undertake. Led by Florin, a highly trained professional with over 20 years of experience in the construction industry and a proud member of the Federation of Master Builders (FMB) since 2014, our company is built on trust, quality, and attention to detail. Working alongside trusted electricians and plumbers, we offer a complete service that ensures every aspect of your project is handled with care and expertise. Much of our success has come from referrals and repeat clients, a testament to the satisfaction and confidence our customers have in our work. At Safeway Build Ltd, we don’t just build — we build lasting relationships, turning your vision into reality with professionalism, transparency, and dedication. Whether you are looking for loft conversions, extensions or a refurb, all our services are carried out carefully, efficiently and to an exceptionally high standard of quality. We are happy to undertake any domestic work. At Safeway Build Ltd, no job is too big or too small.
Get in touch
Latest review:
Kitchen Fitting- 10 Feb 2026
Florin and team were a joy to work with. Very communicative and worked to a great timeframe. Lots of little extra jobs were completed at no extra charge. Cost for job was reasonable and the tiling was immaculate - would definitely use Florin again. Would highly recommend!
Coulsdonbuilders Ltd
Rating: 5 out of 5
Extension Builder in Mitcham
Coulsdon Builders has been successfully making home improvements for over 15 years. We are ready to fulfill your needs as a builder. Whether you desire a full renovation to create your new dream home or home improvements or general enhancements to add value and space to your property, we are here to assist as a contractor. Coulsdon Builders can propose and carry out the best building solutions for you to achieve your building goals, within your budget and in a short time-frame.
Get in touch
Latest review:
I wanted a side infill extension, converting a one bed into a 2 bed. The works was undertaken by Coulsdon Builders which took around 8 months. I made several changes throughout the project hence the delay. They were so accommodating and never had an issue and was always happy to cooperate. The cost of build was £120k and we stuck to the budget. I am delighted with the works and am grateful they made my house a home. They were clean and tidy on a building site and always kept me updated on progress. This is one builder that I highly recommend and trust. Great work guys and thank you again!
FM Class Brickwork LTD
Rating: 5 out of 5
Extension Builder in Mitcham
FM Class Brickwork specialises in all aspects of brickwork and blockwork. With over 18 years of experience in the building industry , we are always ready to take on new projects and deliver the best results to our customers in a timely manner and without delay. We specialise in : Brickwork and blockwork extensions Brickwork repairs/restoration Structural repairs Brickwork design/feature Pointing/repointing Garden walls
Get in touch
Latest review:
Bricklaying- 10 Aug 2024
Florin was great from initial conversation to the execution of the work to a high standard. Pleasure to deal with and knows his stuff, will definitely recommend. Thanks Florin

4.1

Top rated Extension Builders

Our Extension Builders in Mitcham, are rated 4.1 out of 5 based on 22 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 Mitcham?

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

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

What are the hourly rates of extension builders in Mitcham?

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

Find extension builders in Mitcham with MyBuilder

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

Step 2: Compare different extension builders in Mitcham

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

Step 3: Hire Mitcham extension builders with confidence

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

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

What to ask a Mitcham extension builder before hiring?

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

An extension builder in Mitcham 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 Mitcham 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 Mitcham?

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 Mitcham 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 Mitcham 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 Mitcham

Can an extension builder in Mitcham help with planning permission?

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

Many Mitcham 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 Mitcham help with materials and finishes?

Yes, most extension builders in Mitcham 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.