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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Callum downing
No reviews yet
Extension Builder in Chelmsford
Building company offering services from planning to completion with all aspects in between undertaken.
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Top Tier Brickwork
No reviews yet
Extension Builder in Chelmsford
Bricklayer based in Essex with 18 years experience in both the residential and commercial setting. We strive to give the customer the most professional and cost effective service possible carried out to a Top Tier standard.
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RK brickwork
No reviews yet
Extension Builder in Chelmsford
Hi I'm Robert. I’ve always had a passion for brickwork ever since I left school. I have a level 3 NVQ and I have my SMSTS, I am currently a supervisor for a large well known national building company. I have a huge amount of experience in all aspects of brickwork and blockwork. I always produce top quality work and take an enormous amount of pride in everything I do. I’m happy to quote for any job. No job too big or too small.
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Essex brickwork
No reviews yet
Extension Builder in Chelmsford
We’re an Essex based building company, with 20 years combined experience. We don’t just take on brickwork. Although we specialise in extensions and building , we often do driveways, Patio’s and landscaping.
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Hay Construction
No reviews yet
Extension Builder in Chelmsford
We are Construction company specialising in home improvements, Office and Shop Refurbishments. All tradesmen we employ are directly employed from groundwork’s to final stages of silicone sealing.
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Slight Construction
Rating: 5 out of 5
Extension Builder in Chelmsford
Hi I do all groundworks general building extensions, conversions, plasterboard rendering wood work concrete footing brickwork drainage driveways all slabs building maintenance plumbing 28 years experience. I also have a tipper truck for hire,and mini digger ask for more details when you shortlist me.
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Latest review:
Fencing- 10 May 2019
It was a quick response and the job was viewed the next day and a quote given. The job has been done today as promised and I am really pleased with it. Mr Slight was a thoroughly pleasant gentleman and I would recommend him with no problem.
Absolute extensions ltd
Rating: 5 out of 5
Extension Builder in Chelmsford
Trusted builder with over 30 years of experience in the construction industry. Specialising in loft conversions, extensions, refurbishments, patios, structural work, and small jobs. Known for reliable service, quality workmanship, and completing projects to a high stand
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Latest review:
Extensions- 8 Nov 2025
Simon and his team were excellent with every part of the our extension build. From communication, extra ideas , quality of workmanship - nothing was too much trouble. I have no hesitation in giving them a 5 star rating.
Kontor Construction Ltd
No reviews yet
Extension Builder in Chelmsford
At Kontor Construction Ltd, we offer a variety of construction services. We have the knowledge and expertise to carry out all services, from design to completion, to the highest standards. We are a flexible company and can tailor our services to suit your requirements. We are also registered with the Federation of Master Builders Association and Guild of Master Craftsman.
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Absolute Extensions
Rating: 5 out of 5
Extension Builder in Chelmsford
We are a trusted building company specialising in extensions, loft conversions, and full property refurbishments. Alongside our larger projects, we also deliver high-quality patios, fencing, joinery, and carpentry work. With a strong focus on craftsmanship, reliability, and attention to detail, we work closely with our clients to ensure every project is completed to the highest standard, on time and within budget.
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Latest review:
The operatives were fantastic, polite , respectful and trustworthy. They did a good , clean job and I have booked them in for more work ...
Shard Renovations Ltd
Rating: 5 out of 5
Extension Builder in Chelmsford
We are a home Improvement company with over 30 years' experience. We offer a wide range of home improvements from all building work (incl. new builds) to double glazing (timber, Aluminium & uPVC), cladding, soffits & fascia boards, loft & garage conversions. We design & fit kitchens, bathrooms, bedrooms, offices & custom build wardrobes & doors. We are also a FENSA approved installer. You can expect a high standard of workmanship from us. We want happy customers!
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Latest review:
Windows & Doors (uPVC & Metal)- 1 Apr 2023
Shard renovations created a new opening for a window to our en-suite. Sean was timely, tidy, clean and really respectful of our property which was greatly appreciated & made post-job cleaning lightening quick, meaning we were able to use the room again immediately. Would recommend Shard & are already planning ahead to consult them for our next project.
BWB Builders
Rating: 5 out of 5
Extension Builder in Chelmsford
We specialize is all types of brickwork and landscaping, From garden walls to extensions, Patio’s/Steps/Repointing/Brick Resoration/Demoltion/Damp Proofing and much more. We take pride in are work and customer satisfaction is are number 1 priority. Every job is completed to the very highest standard to leave you with a professional job. No job too big or small. Get in touch for free quotations. Thanks
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Latest review:
Bricklaying- 9 Mar 2026
Ben was great at doing our job, he kept me updated evry day from start to finish and matched the brickwork exactly to what was already there. Great service and definately kneww what he was doing - thanks Ben for a great job...
SRP INSTALLATIONS LTD
No reviews yet
Extension Builder in Chelmsford
Here at SRP installations Ltd we specialise in: -all types of building works -extensions -loft conversions -outbuildings/garden rooms -kitchens -bespoke carpentry/joinery -internal renovations -bathrooms -patios -landscaping -fencing With over 25 years experience in the industry we can provide professional customer service doing what we love.
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PTS construction & developments ltd
No reviews yet
Extension Builder in Chelmsford
We are a family run construction business that specialise in house renovations, extensions and loft conversions. We hold our work to the highest standard to give the customer the project they desire
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C J Wiffen Construction Limited
Rating: 5 out of 5
Extension Builder in Chelmsford
At C J Wiffen Construction we like our clients and ourselves to enjoy the process of the work needed to be carried out. We offer a completely hands off approach for our clients, fully project managed from start to finish. We have a great team of various subcontractors who we all know and have worked with for many years which does reflect well on our finished work.
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Latest review:
We used Carl to convert/ rebuild several old farm buildings into beautiful 2 & 3 bedroom homes - Carl and his contractors have done an excellent job on each and every property. We found Carl easy to communicate with and trustworthy.
Delex Services limited
Rating: 5 out of 5
Extension Builder in Chelmsford
Delex Services Ltd is an established British trade contractor specializing in integrated property installation and finishing services. Operating for a decade out of Essex, the company provides end-to-end commercial and residential refurbishments by combining mechanical services with internal outfitting. As an agile micro-entity, Delex delivers highly attentive project management, allowing clients to bypass the coordination of multiple separate subcontractors. We are also Safe Contractor registered and fully insured for private and commercial dwellings We provide full guranteee for outr works and will also try to work out best possible solution within budget and timescale given.
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Latest review:
Steve did a great job at my property. I've recommended him to friends, family and colleagues and will continue to recommend him to anyone in need of the services he offers.👏🏾
Jib_brickwork
No reviews yet
Extension Builder in Chelmsford
Self employed bricklayer with 10 years experience in the building industry
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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.