Extension Builders in Coulsdon

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.7 (16 reviews)

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Some of our top rated extension builders in Coulsdon

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CMT Building services
Rating: 5 out of 5
Extension Builder in Coulsdon
I'm Chris from CMT Building services we do all aspects of carpentry and plastering we are a reliable and friendly team that will make sure the work goes smoothly as possible
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Latest review:
Joinery & Cabinet Making- 7 Feb 2019
I had three quotes and Chris was the most competitive for the job. He was able to come and assess the job soon after making contact and provided a quote quickly afterwards. He was accommodating on timescales and on the day he and Dylan turned up bang on time and got to work quickly. He took care with mess and cleaned up well after the job. Chris consulted with me on little design decisions that needed to be made on the day and the end result is a very good job boxing in my Ikea bookcases that I just need to paint (I hadn’t asked him to do this for me). I’ve got the result I wanted for a fraction of the price of custom built cabinets. Chris is a super friendly guy who was happy to advise me on some questions I had about possible works in my home. We have two nosy dogs who love to acquaint themselves with whomever comes to the house and he and Dylan were great with them. I’d definitely hire him again.
Agnuss Construction Ltd
Rating: 5 out of 5
Extension Builder in Coulsdon
We are a construction company that operates in the local area mostly, but we can also cover all the other areas of Greater London. Our Services include Extensions, Loft Conversions, Refurbishments, and basically all the aspects of building work. We specialise in residential and business projects.
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Latest review:
Agnuss Construction carried out and completed our house renovation, kitchen extension and loft extension successfully. Elio and his father, Mario were very communicative throughout and very reliable. The works were carried out on time and on budget. I would be happy to recommend Agnuss Construction and use them again in the future.
Synergy Construction Group Ltd
Rating: 4 out of 5
Extension Builder in Coulsdon
Synergy Construction Group carry out a vast amount of different works. With our in house team of tradesman we deliver any project to very high standards. We have over combined 40 years experience and can deal with any type of work. Our previous projects show what high standards we work to
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Jwolfconstruction ltd
Rating: 5 out of 5
Extension Builder in Coulsdon
My name is George and I'm running J Wolf Construction building company. I can provide a lot references from happy customers in sw London.
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Latest review:
Extensions- 26 Nov 2019
Great on delivery, good on project management....rate them very high on integrity and transparency
Dodadecorating
No reviews yet
Extension Builder in Coulsdon
DODA DECORATING is an established and professional London based decorating company with a reputation for reliability and quality of workmanship. Based in Croydon we work across the London area with commercial, industrial and private sector organisations, as well as homeowners. We are dedicated to providing the highest quality standards in work, service and safety levels with a comprehensive range of painting and decorating services. Each project is overseen and managed from start to completion and we are happy to offer advice and free quotations.
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D A Lynch Building Services Ltd
Rating: 5 out of 5
Extension Builder in Coulsdon
Hi my name is Dwight. I'm here from D A Lynch Building Services Ltd. I am here to provide you with excellent building work and whatever else you have to do around your home. My company carries out work to the highest quality with professional workmanship.
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Latest review:
I was very pleased with this company so much so that they are starting a new job for me November 15. The building firms carried out a full loft conversion for me installing bathroom, brickwork, joinery, plastering, Roofing and installation of windows and double glazed doors. I have high standards and want everything to be completed in the same way, the workmen respected my home and always left if clean. My main contact was with the owner of the company Dwight Lynch, he was very flexible and Nothing was too much for him to do. He has an attitude which I like in a builder "customer not always right but must be happy" he provided me with ideas along the way and where things did not go to plan due to my own instructions he worked around the issue and provided suitable alternative options. I was very happy with the pricing of the job and feel that certainly I would recommend him and also I would use him again. He and his workmen were all trust worthy and I gave them keys to my house to carry-out work whilst I went on holiday. I had no concerns when I came back everything was as I left it.
Dr Repair Ltd
No reviews yet
Extension Builder in Coulsdon
Founded just under a year ago, DR REPAIR LTD has quickly secured contracts with some of the largest housing associations in the UK. We've successfully completed thousands of jobs across London, ranging from quick fixes to extensive, weeks-long projects. Our skilled multi-traders consistently deliver high-quality results. Additionally, we've been entrusted with numerous disrepair cases, where housing associations, having lost court disputes with tenants, rely on us to carry out repairs to the highest standard.
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Fixtrope Construction Ltd
Rating: 5 out of 5
Extension Builder in Coulsdon
Fixtrope Construction Ltd is a family-run building company with over 15 years of experience in the industry. We specialise in all aspects of carpentry, extensions, loft conversions, new builds and refurbishments. Our experience team work closely with customers to find the best solution for their project. Whatever the size of the job we undertake, we make sure it completed to the highest standard.
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Latest review:
Carpentry- 23 Aug 2019
Roman was great to work with. He took the time to talk the project through thoroughly and delivered on what was discussed. overall very clean quick and friendly. hope to work with him in the future again.
Woodn Construction
Rating: 5 out of 5
Extension Builder in Coulsdon
Hi, I’m a carpenter and sole trader based in South West London with over nine years of experience in the trade. Over the years I’ve worked on a wide range of residential projects such as managing full site builds throughout to creating custom, made-to-measure furniture. My skills cover everything from stud walls, plaster boarding, skirting, architraves, doors and windows, to kitchens, flooring, and bespoke cabinetry. I take pride in delivering a high standard of finish and keeping things tidy and well-organised on every job. I enjoy working closely with clients to bring their ideas to life. Whether that’s fitting a new kitchen, renovating a room, or designing something completely unique. Based locally, I offer a reliable, friendly, and flexible service across SW London and the surrounding areas.
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Latest review:
Hard Flooring- 2 Mar 2026
Highly recommend Kaylum, he ripped out the old sub-floor and fitted a new sub-floor along with new Engineered wood flooring in all of the bedrooms and hallway. Quality of work and attention to detail was exceptional. His colleague then decorated all the rooms beautifully once the floor was installed - really happy with the end result.
LMG Building Services Ltd
Rating: 5 out of 5
Extension Builder in Coulsdon
We are a family run business offering you a personal touch. Work is always completed to a high standard. We are members of the Federation of Master Builders & Our previous customers will be happy to confirm the level of Service, Quality & attention to detail that we provide as standard.
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Latest review:
Conversions - General- 3 Dec 2021
Would 100% recommend Lee. His professionalism and attention to detail was fantastic. Always available for questions outside of working hours (rare for a builder) and an overall nice guy. I'm definitely keeping his number for any future work I do.
Nice Design & Build
Rating: 5 out of 5
Extension Builder in Coulsdon
Quality general builder
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Latest review:
Decking- 16 Apr 2022
Adam is firstly a really lovely guy and we felt comfortable with him from the moment he came and did a very thorough assessment of the job. His work was very neat and clean. The job was done perfectly and we will definitely be using his services for other work on the flat.
M.H Brickwork
Rating: 5 out of 5
Extension Builder in Coulsdon
Welcome to M.H Brickwork. We are a family run business of skilled and qualified bricklayers who have over 30 years experience in all aspects of the bricklaying trade. We pride ourselves on the quality of all our work. You will find our pricing very competitive.
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Latest review:
Michael did a number of jobs for us including a front wall, small garden walls either side of the front path and restructuring the path to include front steps. Michael was reliable and able to give us ideas on what could be done. He is polite, his work is of a high standard and he approaches his work with real professionalism. We are very happy with his work and would recommend him.
Dara Builders & Electricians
Rating: 5 out of 5
Extension Builder in Coulsdon
Dara Builders Ltd are expert local builders based in Carshalton, South West London, specialising in house extensions, loft conversions, kitchen fitting, bathroom renovations, refurbishments, and structural alterations. We proudly serve Sutton, Wallington, Cheam, Wimbledon, Raynes Park, Purley, Banstead and nearby areas. With over 15 years’ experience and rated highly on Google Reviews, we deliver quality workmanship with trusted trades. As a Which? Trusted Trader, we offer clear communication and professional project management from start to finish. Contact Dara Builders Ltd today for reliable local building services.
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Latest review:
Hard Flooring- 30 Sep 2018
Dara Builders were fantastic I will definitely use them again. Very pleased to have found them. Great job and finish, gave helpful advise and suggestions, plus very tidy and considerate.
JPD PILING & GROUNDWORK LTD
Rating: 4.8 out of 5
Extension Builder in Coulsdon
We are a specialist piling & groundwork company / new build & extensions builder & include Lanscaping with 25 years experience.
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Latest review:
Groundwork & Foundations- 20 Sep 2018
JPD boys came to rescue us when we were almost stuck with our RC foundation on our project, we got a very competitive quote from them and the job was done to a very high standard. Not only did they helped with that, they also gave us a quote for the block work, again this was done without snagging. We will definitely use them over again and recommend them to anyone anytime.
Wholehomes
No reviews yet
Extension Builder in Coulsdon
We have been helping clients build their dream kitchen, bathroom, extension or loft conversion for over 25 years. We have expert multi-skilled tradesmen that that can help with any carpentry, plumbing, electrics, glazing, kitchen fitting, bathrooms, repairs, painting and decorating jobs you need help with… from the smallest job to complete house builds. There is simply no job, too big or too small, that we cannot complete to the highest standards. We are the experts for the Wholehome.
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EmiMata
Rating: 5 out of 5
Extension Builder in Coulsdon
All building maintenace Painting All sort of Carpentry Building Gardening
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Latest review:
Groundwork & Foundations- 29 Nov 2025
Working with emi was a breeze

3.7

Top rated Extension Builders

Our Extension Builders in Coulsdon, are rated 3.7 out of 5 based on 16 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.