Extension Builders in Chelmsford

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.5 (11 reviews)

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Some of our top rated extension builders in Chelmsford

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Bricklayer
Rating: 5 out of 5
Extension Builder in Chelmsford
Hi. I am a bricklayer for 15 years and more very professional and more.
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Latest review:
Bricklaying- 9 Aug 2026
Agron was absolutely brilliant. We agreed a price at the end of May however we couldnt go ahead in June (our issue) and Agron was very accommodating. We reached out in July and he fitted us inbetween his other jobs. Each day he came he started at 8:30 and worked till past 6pm. He was always active and we had to encourage a break. He always kept us informed of any changes and issues along the way and at the end we got him to do a few extra bits while he was with us. Overall he did a fantastic job of building a new wall, laying floor tiles. Will highly recommend Agron and i will definitely be using him again for any brick work in the future.
Plumbwise
Rating: 3.8 out of 5
Extension Builder in Chelmsford
I hope this message finds you well! My name is Archie, and I’m excited to offer my plumbing and property improvement services to the community. As a City & Guilds Level 1 & 2 qualified plumber in Plumbing and Heating, I’m equipped to handle a wide range of plumbing needs from routine maintenance and repairs to full installations. 🔧💧 Why Choose PlumbWise? •Professional Expertise: Fully certified and up to date with the latest plumbing techniques and safety standards. •Multi-Skilled: Alongside plumbing, I also carry out plastering, carpentry (chippy work), tiling, kitchen and bathroom fitting, painting, flooring, and demolition work — offering a complete solution for your home projects. •Customer-Focused: I prioritise clear communication, reliability, and timely service to ensure your satisfaction. •Flexible Solutions: Whether it’s a small repair or a full renovation, I’m committed to providing efficient, cost-effective results. Please feel free to reach out for a consultation, quote, or just some friendly advice on your next project. I’m here to help and look forward to working with you! Warm regards, Archie PlumbWise
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Latest review:
Plumbing- 2 Nov 2025
Unprofessional man.
J.Collins Brickwork
Rating: 5 out of 5
Extension Builder in Chelmsford
Here at J.Collins Brickwork we undertake a range of general building activities. Do not hesitate to contact me to go through any home improvements or maintenance works you require.
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Latest review:
Bricklaying- 2 Jan 2023
Nice guys came in with two jobs to do start to finish no problems at all will definitely use service again
Unique Team LTD
Rating: 4.8 out of 5
Extension Builder in Chelmsford
Operating across London and the South East, our specialist team provide both domestic and commercial building services to meet the most challenging or intricate of large and small-scale projects.
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Latest review:
Carpentry- 29 Jul 2026
I asked Michael to do two partition walls, with two sliding doors and also sort out a water leak. he did the job brilliantly, he was always on time, always clear in explaining my options and what to do. he went over and above the instructions and was a pleasure to have him around the house. him and his team were polite, super clean, never ever left debris around and the end results were great. Also he has a great attention to details. I am recommending him highly to everyone I know and for sure will instruct him in the future.
Masterbuild & Maintenance South East Ltd
Rating: 5 out of 5
Extension Builder in Chelmsford
We specialise in all aspects of building work & maintenance work & aim to complete works to the highest of standards along with completion dates.We pride ourselves on our reliability and extensive knowledge of the trade. We deliver a wide range of building services & cater to both the domestic and commercial build. All to include New builds, Extensions, Loft conversions, We aim to achieve high quality workmanship and trust within working relations between ourselves and the client.
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Latest review:
Loft Conversion- 23 Nov 2021
We instructed Masterbuild & Maintenance to undertake a loft conversion and side extension to our bungalow in the spring of 2021. Dan and his team worked tirelessly to ensure that we were happy with every stage of the build and it was never too much for any of them to make modifications to get the desired result. They were hardworking, diligent and genuinely cared about their work which shows in the quality of their workmanship and the various trades employed. Dan’s team worked well together and were on-site every day for the 6 month build. We thoroughly enjoyed working with them on the project and can honestly say that we couldn’t have imagined any other builders doing the work. We are over the moon with the end result and receive so many wonderful comments from people about the job. We would absolutely recommend Dan and his team to undertake any building project and cannot commend their work highly enough.
Cs construction
No reviews yet
Extension Builder in Chelmsford
We do all construction work from patios new builds extensions and loft conversions
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Ultima Group UK
No reviews yet
Extension Builder in Chelmsford
We combine passion with experience to transform your dream home into reality. Whether it’s planning drawings, renovations, extensions, interior designs, or full construction, we are here to assist you at every stage of your project.
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Thundersley Developments
Rating: 4.5 out of 5
Extension Builder in Chelmsford
we are a family run business and have been trading for 12 years now without any advertising, just word and mouth and repeat business. we are looking to find more work and to to expand our business, Thundersley Developments is a 1 stop shop for all aspects of building and landscaping, from fitting a toilet to building a dream home, we can take on any size project but still small enough to care and keep the attention to detail. We are an extension specialist and the most competitive in our area...
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Latest review:
Extensions- 28 Jan 2025
Very competitive on price. Overall, happy with the work
bd property maintenance
No reviews yet
Extension Builder in Chelmsford
We are a family run business so we pride ourselfs on our workmanship and reputation,we untentake complete house renovations kitchens,bathroom,any interior or exterior project including extension and loft conversions
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Weston carpentry and construction ltd
Rating: 5 out of 5
Extension Builder in Chelmsford
With over 12 years experience in all aspects of carpentry I have a wide knowledge of the building trade. With knowledge and experience to fit all your needs. I cover all parts of Essex and Hertfordshire working with our customers to create their desired looks/design.
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Latest review:
Extensions- 28 Mar 2026
Sam is amazing. Quality of workmanship is top notch. Polite and very accommodating. We are so happy with our Dormer Extension. Wouldn't hesitate for a moment to recommend Sam.
Ashdells
Rating: 5 out of 5
Extension Builder in Chelmsford
My business is general building and maintenance. I'm a bricklayer by trade and prior to this I spent seven years with a timber frame company building and erecting timber houses. I am competent in undertaking the following jobs: constructing brick walls, patios, fences, sheds, driveways and first fix carpentry.
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Latest review:
Bricklaying- 29 Jul 2016
Excellent job, very happy with work. Would recommend to and people who require building work.
Frank Halfyard Plastering & Building Ltd
Rating: 5 out of 5
Extension Builder in Chelmsford
Hi my names Frank Halfyard and I am an apprenticeship passed apprentice with city & guilds L3 in plastering I am also Sarna approved lifetime garentee flat roofer. Iv been plastering and building for 17years now. Over the years I have turned my plastering business into a general building company. So for any of your needs you can count on my firm to undertake your works
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Latest review:
Extensions- 4 Nov 2019
On schedule, as per quote and no hassle, will gladly contract Frank's services again.
Fox Conversions limited
Rating: 5 out of 5
Extension Builder in Chelmsford
Fox Conversions is a small family run company based in Essex, we also cover London & Kent. Offering loft conversions, garage conversions & extensions, offering a service from planning to completion. Offering a personal bespoke touch, as a small company Fox Conversions has been converting lofts, garages and caring out extensions for the past ten years. Do not settle on builders anonymous for your needs. Trust a small, family run business that has specialists to carry out the tasks at hand.
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Latest review:
Highly recommend this company very good builders, knew what they was doing and had a high quality of work The job was finished on time and and for the original price agreed Thank you for your work
Unique build and interiors limited
Rating: 5 out of 5
Extension Builder in Chelmsford
Hello and thank you for visiting us. We are Essex’s unique and most creative building, refurbishment contractors. Since 2012 our list of happy clients has continued to grow and grow, a fact which we are of course very proud of indeed. From kitchens to loft conversion, extensions to shop-fits, we always employ the same work ethic. Honest pricing, prompt communication, high quality work & happy clients.
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Latest review:
Extensions- 7 Oct 2019
We hired Tom and dan from unique build to take on our extension/kitchen remodel along with a few smaller refurbishment jobs around the house. They guys priced the job from the drawings and was cheaper then the 2 local builders we was recommended by friends and also seemed to really no there stuff so we hired them for the job. There team worked really hard and kept to all dead lines and was clean and tidy. Toms team ranging from bricklayers to heat engineers and electricans was so efficient and all worked seamlessly together to get the job done on time and to budget we can’t recommend them enough and wouldn’t go to any one else for building works. It’s a shame we can’t post picture of the work the guys have done as it really does look the part well done guys.
TA Cannon Building and Maintenance
Rating: 5 out of 5
Extension Builder in Chelmsford
I have been in the business for over 20 years. I have a great team along side of me and an impressive portfolio to show work I have completed.
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Latest review:
Groundwork & Foundations- 17 Jul 2024
Tommy had great communication. Was happy to change plans as the project developed and completed the job on time and budget. Would recommend.
Ionut Palade
Rating: 4.4 out of 5
Extension Builder in Chelmsford
Family owned business with several years of expertise in construction industry, both domestic and commercial, covering all aspects of internal and external works such as, but not limited to: extensions, loft conversions, fencing and landscaping, driveways and footpaths, drywall, painting and decorating, carpentry, tiling, laminate/vinyl/carpet floors. We also have a strong relationship with a gas engineer with capacity to remove/ install and commission gas boilers along with first and second fix plumbing and an accredited electrician.
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Latest review:
Restoration & Refurbishment- 2 Oct 2024
I just wanna express honest with you I met up with Mr John on two occasions and I told him everything I want confirmed we confirmed the price he sent us a spreadsheet but later on confirmed a figure once that was done he said send pictures. I’ll get the items for you and will get everything done for you in a time which was originally 2weeks . Then 2 month and half later he ignore my calls very unprofessional and has outstanding task he left and still not even correct , I am not able to go in to all the details but I tell you for free how I’ve been treated for the last few weeks mentally draining and for example he said let’s get his electrician because he needs the person doing the work side-by-side and if I’m honest, they’ve done nonsense because the media where the plug is is not correctly positioned in fact, the TV does not go in properly as they positioned it in the wrong place they didn’t check where the TV was meant to go initially I have to sort this out myself. Pic Show the inc

4.5

Top rated Extension Builders

Our Extension Builders in Chelmsford, are rated 4.5 out of 5 based on 11 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.