Extension builders in Chelmsford

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.4 (9 reviews)

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Some of our top rated extension builders in Chelmsford

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Mega Co Group Ltd
Rating: 5 out of 5
Extension Builder in Chelmsford
Mega Co Group Ltd is a professional brickwork and stonework company delivering high-quality workmanship across all aspects of masonry. We specialise in extensions, garden rooms, summer houses, new builds, and repointing for brick and stone properties. With a reliable and experienced team, we complete projects efficiently, safely, and to a high standard. We take pride in our attention to detail, clear communication, and leaving every site clean and tidy. Customer satisfaction and long-lasting results are at the heart of everything we do.
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Latest review:
Repointing- 24 Aug 2026
Anton. is very good and professional. I highly recommend him to everyone
SIDDH GLAZING LTD
Rating: 5 out of 5
Extension Builder in Chelmsford
WE ARE A UPVC AND ALUMINIUM DOOR ,WINDOW BIFOLD MANUFACTURERS .
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Latest review:
Nice and clean job and finished on time
Mandeep singh
Rating: 5 out of 5
Extension Builder in Chelmsford
Hii we do all types of ground work landscaping and demolition on very decent prices
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Latest review:
Groundwork & Foundations- 30 May 2026
Really happy with Mandeep and the team. They are friendly, hard working and helpful. Communication is excellent and honest. I would not hesitate to recommend them
S Francis & Sons Ltd
No reviews yet
Extension Builder in Chelmsford
We are a third generation family run business, we have a great deal of expertise in all aspects of building and maintenance. We specialise in Carpentry and joinery anything from hanging a door to loft conversions, extensions and shop fitting. We are recommended installers and can design and fit your dream bathroom, bedroom or kitchen at very competitive prices .
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Groundworker
Rating: 5 out of 5
Extension Builder in Chelmsford
Jsr contruction all types of building work interior exterior painting driveways foundation
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Latest review:
Groundwork & Foundations- 22 Sep 2026
Great work done at reasonable price
Auburn Group Ltd
No reviews yet
Extension Builder in Chelmsford
Auburn group can deliver a comprehensive range of services in-house, utilising the expertise of teams from auburn services and cedar mechanical & electrical. These services cover: - Mechanical services, including ventilation, cooling, and heating. - Electrical services. - Plumbing services - Roofing services The advantages of having these services in-house is the elimination of the need to hire subcontractors. Additionally, Auburn services is proficient in handling projects such as refurbishments and fit-outs.
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Nc property services
Rating: 5 out of 5
Extension Builder in Chelmsford
Fully qualified electrician and multi-trade specialist with over 20 years of hands-on experience delivering single-storey extension builds, complete kitchen and bathroom refurbishments, and commercial refits. Based in Loughton, I serve clients across London and the Home Counties. Experience Over 13 years of trade experience spanning domestic extension builds, structural wall modifications, full kitchen and bathroom transformations, and co-founding a 39-strong engineering firm. Services & Expertise Extensions & Structural Builds: Single-storey extension framing, structural wall openings, carpentry, and flat roof repairs/installations. Kitchen & Bathroom Refurbishments: End-to-end fit-outs, floor laying, plumbing, electrical integrations, and space layout modifications. Electrical Compliance: CSCS card holder with Inspection & Testing certification for rewires, fault finding, testing, and consumer units. Maintenance & Repair: Planned preventive maintenance, disrepair remediations, and general trade upgrades. Areas Covered Loughton (IG10), Greater London, Essex, and surrounding Home Counties. Why Choose Me I offer direct, approachable communication and strict attention to detail on every project. From structural extensi
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Latest review:
Nick is excellent. Very resourceful and has a great attention to detail. He's given us the confidence to do more work to our house. Would highly recommend.
Alan Hedger
No reviews yet
Extension Builder in Chelmsford
i am a experienced building with 45 years experience i can do any brickwork from small walls to complete houses
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MAL brickwork ltd
No reviews yet
Extension Builder in Chelmsford
Quality brickwork with 35 years experience
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Beni The Builder Ltd
Rating: 5 out of 5
Extension Builder in Chelmsford
I am a mutli trade building company, and I carry out loft conversions, extensions, full refurbishments and renovations, new builds and garage conversions. I also carry out smaller jobs such as both interior and exterior decorating, kitchen fitting, bathroom fitting, tiling and general repair works. We also do fencing, paving and decking.
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Latest review:
Fencing- 9 Jun 2020
To say we are delighted with the results from Beni The Builder, is an understatement.They did an excellent job building a substantial retaining wall using railway sleepers and installing a new fence along the top. They also helped collect materials which enabled us to start the work sooner. Extremely capable and competent team, arrived on time and left the job site clean and tidy after completing the works. They dealt with some difficult ground works easily and expertly. Price was competitive and the quality exceeded expectations. I have no reservation recommending Beni The Builder and will invite them back for some projects we have planned in the near future.
method contract services ltd
No reviews yet
Extension Builder in Chelmsford
Method Contracts Services Ltd was formed in 2007,we are a building contractor based in Benfleet Essex . Method has worked with the nhs and local councils but in the last 2 years set up a domestic work division within our company .Customers are more than welcome to visit our office to discuss their home improvements ,design and budgets .With Method you will get a full breakdown of priced work and sercurity of contract signed by each party.
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J&K Carpentry
No reviews yet
Extension Builder in Chelmsford
J&K Carpentry offer a wide selection of services covering the whole of Essex. We cover all aspects of: Carpentry, Roofing, Landscaping , Full House Restoration, Extensions, Garden Rooms, Groundworks , and many more. We have a team of Electricians, Plasterers and Bricklayers to hand aswell. All of J&K Carpentry works are fully guaranteed and insured. We also offer a full project management, keeping a weight off our clients shoulders.
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Rainland Group ltd
No reviews yet
Extension Builder in Chelmsford
Rainland Construction Ltd is a UK-based construction and property solutions company founded on the principles of integrity, excellence, and stewardship. Rainland is committed to delivering top-tier construction services that stand the test of time. We specialise in residential and commercial builds, renovations, and design-build packages for UK residents and diaspora investors. Our goal is to build not just structures, but lasting value for homeowners, developers, and communities. Our Vision To become a trusted leader in construction and development, transforming spaces and enriching lives through ethical and professional building practices. Our Services - New Residential and Commercial Builds - House Extensions and Loft Conversions Renovation and Refurbishment Projects - Design + Build Turnkey Solutions - Project Management and Consultancy - Sustainable & Green Building Solutions Why Choose Rainland? - Faith-Driven Integrity: Transparent, honest dealings at every stage.
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DWELLING DESIGN AND DEVELOPERS LIMITED
Rating: 5 out of 5
Extension Builder in Chelmsford
We operate in the construction industry. We have highly satisfied customers and we thrive on our work quality. We are based in London and cover all around the UK. We are customer and quality focused builders so no job is too small or too big for us. We deal with commercial and private properties. All our jobs are well managed and are finished to high standards. We have a highly friendly large group of workers and we take care of all our clients needs & make their dream homes come to life.
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Latest review:
Extensions- 19 Jul 2021
Jitender/Tinku and his team were excellent from the first time we met. They provided us with ideas to better our layouts, helped with sourcing a number items and put us in contact with suppliers which helped us achieve more competitive prices. I was kept updated with the progress regularly and most importantly the project was completed on time and within budget. Shah Builders take real pride in their work and it shows in the finished product. We are very pleased with the outcome of the project and have recommended Shah Builders to friends and family.
Concept Infrastructure Limited
Rating: 5 out of 5
Extension Builder in Chelmsford
We are a family run business with over 30 years experience in all aspects of the Building Industry and we are all fully qualified tradesemen. We are a flexible and versatile Company that will always spend that extra time in looking after our customers needs. In our experience by completing Projects on time, in budget and to the customer’s requirements, we continue to receive repeated business from our customers. “Basically, From Concept to Completion we've got it covered”
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Latest review:
Extensions- 6 Aug 2020
I’ve lost count of how many times we’ve said how lucky we were that we chose Bryan and his team to build our kitchen extension. The team went above and beyond to ensure as little disruption as possible, as we remained living at home whilst the work took place. During this difficult time, Bryan did everything possible to source the materials required to finish our build before our baby arrived and some how he managed it! His team were really friendly and the family miss having them around. They always tidied up after themselves before leaving too. What we thought was going to be a stressful time was in-fact the opposite. Bryan managed the whole process, kept us updated throughout and made sure the build remained on budget. The level of finish is of the highest standard, better than we could have imagined and I can’t recommend Concept enough. We will undoubtedly be using them again for work in the future. Thanks again to Bryan and his Team.
KRPROPERTYCARE
No reviews yet
Extension Builder in Chelmsford
Experience in all aspects of property care and maintenance no job too small, friendly service, free estimates
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4.4

Top rated Extension Builders

Our Extension Builders in Chelmsford, are rated 4.4 out of 5 based on 9 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Chelmsford?

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

Find extension builders in Chelmsford with MyBuilder

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

Step 2: Compare different extension builders in Chelmsford

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

Step 3: Hire Chelmsford extension builders with confidence

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

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

What to ask a Chelmsford extension builder before hiring?

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

An extension builder in Chelmsford 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 Chelmsford 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 Chelmsford?

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 Chelmsford 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 Chelmsford 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 Chelmsford

Can an extension builder in Chelmsford help with planning permission?

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

Many Chelmsford 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 Chelmsford help with materials and finishes?

Yes, most extension builders in Chelmsford 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.