Extension builders in Coulsdon

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (15 reviews)

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Some of our top rated extension builders in Coulsdon

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Aitchison Development Construction Limited
Rating: 4.8 out of 5
Extension Builder in Coulsdon
We have been in the property development and building work for more than 20 years. We specialise in loft conversions, extensions, new builds, bathrooms, kitchens, steel works, driveways, decking etc. I have uploaded images of my recent works.
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Latest review:
Extensions- 20 Nov 2025
I recently had a rear extension done on my 1930s house, along with a new kitchen, upstairs bathroom, and downstairs shower room, and I honestly couldn’t be happier with the whole experience. Omer came out to view the property just before completion and kept in touch so he could start work the moment we got the keys, which was brilliant for us! From day one, his communication was spot on. He explained everything clearly, set out exactly what was included in the quote, and made sure we understood the plan so there were no grey areas or unexpected surprises which is everyone’s worst nightmare during a reno!! The quality and speed of the work were exactly what we hoped for. The team often worked weekends and late evenings to keep things moving. Omer was always at the end of the phone if we needed anything, and he’s genuinely a lovely person who made the process far less stressful with his humour. I’ll definitely be using him again.
MPS Building Services
Rating: 5 out of 5
Extension Builder in Coulsdon
MPS Building Services is a company providing a professional service to the construction industry and our endless client base,providing a high quality service to our clients all over the south east of the country.the service we provide is a professional,friendly,clean and reliable service.
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Latest review:
Extensions- 11 May 2016
Really happy with the work Paul and his team did on our extension. They were quick, neat and tidy throughout and kept us updated at each stage. There were some early design changes which building control insisted on and they were happy to adapt to the new plans without fuss. We couldn't believe how quickly it was all finished and the standard of work was very high too. Would definitely hire again if we ever need to.
Al Costa Construction LTD
Rating: 5 out of 5
Extension Builder in Coulsdon
WHO ARE WE? With over 25 YEARS OF EXPERIENCE with AL Costa Construction, you will find the best services provided by professionals that understand and have the knowledge of the process of construction and renovation that best suits your project. It does not matter how big is your project, we work with excellence and dedication to reach perfect results. We try to merge trends with innovating materials and processes in each project, in order to achieve high standards results in every project. OUR TEAM Our team is formed by professionals that are able to perform your project with quality, so your dream project can get out of paper and become a dream come true. Our professionals are always concern with the client’s wishes and try to combine it with them expertise, in order to achieve a final result above expectations, functional and with premium quality. OUR GOAL We try to come up with the best solutions in construction and renovation to provide ours clients an excellent experience. Our main goal is to offer services that match ours clients needs, with an excellent quality.
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Latest review:
Hard Flooring- 11 Dec 2018
Did my 3 bedroom house wooden flooring for full house. Had a wonderful experience with Alex, great job and completed on time with good standards. He gave some good suggestions which improved the quality and neatness of work. highly recommending will work with him again.
Clarence Loft Conversions
Rating: 5 out of 5
Extension Builder in Coulsdon
Clarence Loft Conversions is a small carpentry based building company specialising in Lofts. We cover all aspects of building works. Concentrating on one job at a time, providing a high quality finish. Covering Surrey and south west London.
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Latest review:
Building work was very well done and the boys were great. Thank you 👍
Premier London building projects Ltd
Rating: 5 out of 5
Extension Builder in Coulsdon
I am Arek from Premier London building projects Ltd I have over 20 years of experience in building sides . I and my team take pride in our quality of work and customer service .
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Latest review:
Bathroom Fitting- 5 Dec 2023
Excellent and very professional. The finishing is superb. I am a construction engineer and am very impressed. The works team are very positive and helpful. I will definitely engage them again.
Coulsdonbuilders Ltd
Rating: 5 out of 5
Extension Builder in Coulsdon
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.
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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!
Gaci builders limited
Rating: 5 out of 5
Extension Builder in Coulsdon
Gaçi Builders provides all building and decoration services to meet your specific needs. We value our customers and are trustworthy and reliable.
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Latest review:
Bathroom Fitting- 1 Jun 2025
I am really pleased with my new bathroom. I needed a partial refurb and new flooring due to a previous leaking shower. Landi did a great job fitting new taps, shower and sink in my bathroom. He was also able to advice me on the best sink and radiators and helped me to choose the right fittings when I was ordering. I didn't like the colour of the sealant and he redid it in another colour with no issues. He was efficient, friendly and completed the job in good time. Communication was always swift and I would be happy to recommend him to others and use him again for other jobs. Thanks Landi for great service.
ASAR PLUMBING AND BUILDING
Rating: 5 out of 5
Extension Builder in Coulsdon
I am a qualified plumbing heating engineer and General builder, i have learned my trade working for a plumbing / building company for 15 years. i have also been Nescot College for four years where i gained my qualification. I am hard working person, honest, trustworthy and take pride of my job. Customer satisfaction is my top priority.
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Latest review:
Extensions- 17 Mar 2024
Agim and his team were great - communicated what they would do at each stage, the timing, materials needed etc., no major surprises. The building is quite old and wonky in places so they had to work with that and the finished result looks great. Very happy and have would recommend Agim again!
Happy Building London Ltd
Rating: 5 out of 5
Extension Builder in Coulsdon
Hello, We’re an architectural design and construction management company with a love of creative inspiration. We help turn dreams and visions into reality for people who aspire to live in exceptional contemporary spaces. Big ideas are our thing. Along with expertly costed build packages. Then there’s our end-to-end project management service, perfect for people who want to leave nothing to chance.
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Latest review:
Restoration & Refurbishment- 17 Jul 2016
Valter was very impressive on his initial visit with some exciting ideas for the house improvements and we had no hesitation in choosing Happy Building above the other two building firms who quoted. Having signed off on the budget and scope of work, Valter's team of builders arrived. We were hugely impressed with the skill, experience and work ethic of the team; the fact that they arrived early each morning smiling underlined the "Happy Building" epithet; Jarek, the site foreman, had an especially cheery demeanour. The work involved stripping the walls back to bricks, removing walls, reinforcing foundations, plastering, extending the bathroom and removing one bedroom to create a large ensuite bedroom. The latter certainly would not have been done without Valter's vision and patience in explaining how it would look. We were able to deviate from the original plans without any problem which was very important in achieving the final look which we had desired. Valter was very careful in sticking to time and budgets which I had never experienced before with builders. The kitchen, bathroom, two bedrooms, living room and hallways were finished to the highest possible specification within our budget. There were one or two small features which, with hindsight, we would have improved such as door handles and shower fittings, however this was down to us not specifying exactly what we wanted. These are very minor details and a tiny part of the overall picture.
George
Rating: 5 out of 5
Extension Builder in Coulsdon
I am a NVQ level 2 bricklayer and stonemason with over 20 years of experience. As a professional experienced bricklayer, I can set out and undertake all types of brickwork, stonework and blockwork from garden walls to new houses. I pride myself on my work, so I focus on customer satisfaction and quality workmanship. All work is carried out to a high standard. I understand how hard it is to find a trustworthy and reliable tradesman. Hence when I start a job, I stay until it is finished.
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Latest review:
Bricklaying- 6 Jun 2026
The job was two small garden walls. George explained how the job would be carried out. He is friendly and turns up on time. He is a skilled worker and did a fantasic job. Would recommend George
5 Star Renovations
Rating: 5 out of 5
Extension Builder in Coulsdon
Hello, We are a home renovation company specialising in Kitchens, Bathrooms and all other internal works. High quality work whilst working at a good pace to ensure completion. We look forward to working with you.
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Latest review:
Plastering- 25 Jul 2024
Lewis and his team were very professional. They treated my house with respect. They delivered the job on time and to an excellent standard. Competitive price and very efficient service, will definitely use him again.
MJV Extrem Construction Ltd
Rating: 5 out of 5
Extension Builder in Coulsdon
MJV Extrem Construction specializes in refurbishments, extensions, loft conversions, new builds and complicated structural alterations.We are ready to help with any of electrical,plumbing and Gas desigh and installations included all aspect of different heating systems and UFH systems. We also undertake smaller projects like kitchen/bathroom Installation’s ,gardening and all your property needs from A to Z. Fully insured. Free quotations
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Latest review:
Plastering- 20 Jun 2025
Rerendering, repairing and redecorating front of house. Vic and his team were excellent. Highly skilled, respectful and trustworthy. Job was completed to a very high standard at a fair price. Couldn’t be happier. Will definitely use him again and would not hesitate to recommend him to others.
AG Home Improvement
Rating: 5 out of 5
Extension Builder in Coulsdon
AG Home Improvement over 10 Years of experience in the domestic construction industry Doing loft conversions, house extensions bathrooms ,kitchen's and general refurbishment's
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Latest review:
Plumbing- 17 Aug 2022
Aldi was professional, courteous and completed the job as stated. I hope to use his services again in the near future.
Michal Palucki
Rating: 5 out of 5
Extension Builder in Coulsdon
I am a carpenter from trade, with 15 years of experience. My services include: new window installation /replacement /repairs, Internal and external door installation /replacement /repairs, Lock installation/change, glazing, adjustments, secures
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Latest review:
Windows & Doors (uPVC & Metal)- 20 Aug 2019
Great quality work and super accommodating! Highly recommend.
Lto construction
Rating: 5 out of 5
Extension Builder in Coulsdon
We are a family run building company with years of experience. We fully commit ourselves to each and every project and try our hardest to exceed our clients expectations.
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Latest review:
Bricklaying- 23 Oct 2018
Tony and his team were phenomenal! Professional, courteous, reliable, tidy and quick. Tony's communication throughout the build was consistent, clear and precise. Tony really listened to me throughout the process; provided advice and options but most of all completed the project the way I needed it. The whole build went exceptionally smoothly, was finished ahead of schedule and on budget. Tony's workmanship is excellent and the final finish spot on. I was really worried about finding the right builder for my project... I simply could not have found better. I got several quotes from different providers and Tony's represented the best value for money. I highly recommend Lto builders, you will not be disappointed.
Mati Construction
Rating: 5 out of 5
Extension Builder in Coulsdon
We are a family company with over 15 years of experience. Our team is highly professional. We offer wide range of services which include: - lofts, extensions - bathrooms and kitchens renovations - painting, decorating, wallpaper - flooring (all kinds) - roofing - property maintenance - building renovations/ rooms renovations - plastering, tiling, rendering and many many more!
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Latest review:
Extensions- 15 Nov 2022
Pawel and his team did a great job with our front porch, always punctual, polite and good quality work. Will be hiring them again.

4.1

Top rated Extension Builders

Our Extension Builders in Coulsdon, are rated 4.1 out of 5 based on 15 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Coulsdon?

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

Find extension builders in Coulsdon with MyBuilder

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

Step 2: Compare different extension builders in Coulsdon

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

Step 3: Hire Coulsdon extension builders with confidence

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

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

What to ask a Coulsdon extension builder before hiring?

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

An extension builder in Coulsdon 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 Coulsdon 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 Coulsdon?

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 Coulsdon 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 Coulsdon 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 Coulsdon

Can an extension builder in Coulsdon help with planning permission?

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

Many Coulsdon 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 Coulsdon help with materials and finishes?

Yes, most extension builders in Coulsdon 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.