Extension Builders in Brentwood

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.4 (14 reviews)

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Some of our top rated extension builders in Brentwood

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Badesha builder ltd
Rating: 1 out of 5
Extension Builder in Brentwood
I am running a company badeshabuilder ltd. I have hard worker people working for me, whose have 12 year experience in builder work. We doing all extensions, bathrooms, kitchen, loft and all kind of building work. Please take a look of photos of previous work. Thanks for reading.
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Latest review:
Plastering- 18 Mar 2021
Guy came down to quote and I've subsequently text him as to when he can start and 2 days no answer. Gave the job to someone else. Not professional at all!!!
Leigh Home & Garden ltd.
Rating: 4.5 out of 5
Extension Builder in Brentwood
We are a small business based in Leigh on sea, offering a personal service. We do not run multiple jobs and you will deal directly with us. We complete the job in your home and garden to the highest standard – from design to end product.
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Latest review:
Extensions- 12 Jan 2019
Wow, wow wow. I do not even know where to begin with this absolute gem we managed to find local to my father in laws project in Southminster, Essex. My in-law is not the easiest guy to work with but John worked so hard to fix all the previous issues a cowboy builder had left him with and he also worked very hard day and night (sometimes 15 hours!!!!) He went above and beyond service. We have never seen such perfect plastering (like glass) and structurally sound work being done by a true professional. He also finished the extension with cladding on the outside and flooring in a huge 80sqm space and to say we are all extremely happy would be an understatement. If you're wondering whether to hire John, please do not! He is worth every penny, he is reasonable and wants to do the job to please you and likes to finish to a very high spec and is always on time and reliable and gives you great ideas to make the house look perfect. Without a doubt the BEST builder we have ever hired and we cannot wait to use John again and again in the future. Thoroughly recommend and wouldn't hesitate to reference any of Johns future work. Thank you so much John, thank you!!
Dtdbrickwork
No reviews yet
Extension Builder in Brentwood
We've over 30 years brickwork experience , dtdbrickwork take on projects from garden walls to new build developments, please feel free to contact us for quote. Please feel free to have look at our Facebook page for pictures of recent jobs completed DTDBRICKWORK
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Dsd builders ltd
Rating: 3 out of 5
Extension Builder in Brentwood
At Dsd building company our mission is to deliver high-quality construction solutions that exceed our clients' expectations. We prioritize sustainability, safety, and customer satisfaction in every project, ensuring that each structure we create is not only aesthetically pleasing but also functional and durable.
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GRAND DESIGNS INTERNATIONAL LTD
Rating: 5 out of 5
Extension Builder in Brentwood
Grand Designs International (GD) | Architectural, Engineering & Construction Services At Grand Designs International (GD), we are dedicated to delivering high-quality architectural, engineering, and construction services tailored to meet our clients’ unique needs. Backed by over 20 years of expertise, our team specializes in transforming visions into reality—whether you're planning a new build, home extension, loft conversion, or full-scale renovation. With a strong foundation in innovation, sustainability, and precision, we provide end-to-end project solutions, from initial design and planning permissions to structural calculations and final construction. Our commitment to quality, efficiency, and client satisfaction ensures that every project is completed to the highest standards. Why Choose Grand Designs International? ✅ Full-Service Expertise – From architectural planning to construction, we handle every stage seamlessly. ✅ Planning & Building Regulations Specialists – We navigate approvals efficiently to prevent delays. ✅ Experienced & Certified Team – Qualified engineers, architects, and builders with a proven track record. ✅ Tailored Solutions – Every project is custom-designed to meet your style, space, and budget needs. ✅ Transparent Pricing & Project Management – No hidden costs, just reliable service with regular updates. ✅ Fast Turnaround & On-Time Delivery – We work efficiently without compromising quality. Our Services 🏡 Architectural & Planning Services Planning Applications & Building Regulations Approval Concept & Detailed Design Interior Design & Space Planning 3D Visualizations & Rendering Enforcement & Retrospective Planning 🏗️ Structural & Engineering Design Structural Calculations & Drawings Civil & Structural Engineering Services Quantity Estimation & Cost Planning 🔨 Construction & Building Services Home Extensions & Rear Extensions Dormer Loft Conversions & Flat Conversions New Build Homes & Full Renovations Project Management & Site Supervision Construction Planning, Procurement & Logistics Quality Control & Safety Management At Grand Designs International, we believe in delivering excellence, one project at a time. Our reputation for integrity, professionalism, and top-tier craftsmanship makes us the preferred choice for homeowners and businesses across London and beyond. 📞 Get in Touch Today! Let’s discuss your project and bring your dream home to life.
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Latest review:
★★★★★ Highly Recommended! I had an existing 3-bedroom rundown property and contacted multiple builders before meeting Director Mr. Q Nawaz. From our first meeting, I was impressed by his ideas and the fact that Grand Designs could provide all services in-house. Initially, I proceeded only with the planning application to see if what he promised was possible—and YES, he delivered! My application was approved as he assured me. Seeing this success, I entrusted them with the entire construction project, and Grand Designs completed it within just 6 months, despite the challenges of COVID-19. Not only did they build my project, but they also added significant value to the development. I’m proud to have worked with them, and their exceptional work on my St Albans development is now featured in their portfolio. Within one year, the value of my property increased by £500,000—a testament to their expertise! Extremely professional, highly skilled, and very reasonably priced. You don’t need to go anywhere else—Grand Designs is the complete package!
JC Group Property Sevices LTD
Rating: 5 out of 5
Extension Builder in Brentwood
JC Group Ltd is a reliable and experienced building company offering bathroom installations, plumbing, home extensions, and general building works. With over 30 years of combined industry experience, we take pride in delivering high-quality workmanship, clear communication, and projects completed on time and within budget. We are committed to customer satisfaction and maintaining the highest standards on every job, no matter the size.
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Latest review:
We’re absolutely delighted with the extension and the overall experience from start to finish. The workmanship is to a very high standard, and everything was completed professionally and on schedule. Communication throughout the project was excellent, and we were kept informed at every stage. The team were reliable, tidy, and respectful of our home, and the finished extension has exceeded our expectations. We wouldn’t hesitate to recommend them to anyone looking for quality work and a stress-free build.
Simran
No reviews yet
Extension Builder in Brentwood
All types of work undertaken Loft conversions, extensions, full refurbishments Driveways and landscaping
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Edeenwood carpentry and building
No reviews yet
Extension Builder in Brentwood
Construction company that specialise in loft conversion,extensions,new builds ,renovation work,garden rooms etc.
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brikworc
No reviews yet
Extension Builder in Brentwood
brickworc
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Mian builders london limited
No reviews yet
Extension Builder in Brentwood
We are a professional builders
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R&S construction services
Rating: 5 out of 5
Extension Builder in Brentwood
I have been for 20 years now in building works i like what i do and i like make other people to have they dream house to make them happy
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Latest review:
Great service received. Called Martin out that day and he fixed my front door straight away. Great price and great service received will be using him again in the future.
Concept Infrastructure Limited
Rating: 5 out of 5
Extension Builder in Brentwood
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.
TTP Electrical Services Ltd
No reviews yet
Extension Builder in Brentwood
Welcome to TTP Electrical services Limited. We have over 10 years of experience in the industry and have been operating as a Limited company since 2014. NVQ city and guilds qualifications and NICEIC accreditations mean you can trust you are in good hands. Fully insured and vetted for peace of mind. Email, text or call and we will be more than happy to assist you. We also have a checkatrade account with many reviews on so feel free to check us out!
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Irek’s
No reviews yet
Extension Builder in Brentwood
Usually i do flooring, tiling, kitchen fit, bathrooms, roofs, house refurbishment, brick work and extensions. I have over 12 years experience doing these types of things.
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Cani 1 construction
Rating: 4.7 out of 5
Extension Builder in Brentwood
we have a construction company we are in the happy position to fulfill each one separately our company is family owned we have been in this area for over 15 years, we offer (brickowork)🧱 face bricks face blocks garden wall retaining wall extension new building new house Repoiting landscape design & builds🏜
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Latest review:
Bricklaying- 17 Aug 2026
Rear single storey extension, they do the job professional!! Highly recommended!!
KINGSCREST UK
New on MyBuilder
Extension Builder in Brentwood
KINGSCREST UK brings fresh ideas and skilled workmanship to outdoor spaces, creating gardens that feel inviting, practical, and beautifully finished. We handle complete landscaping projects, including garden makeovers, paving, patios, pathways, brickwork, raised beds, turfing, fencing, decking, artificial grass, and bespoke outdoor features. Our team focuses on neat construction, thoughtful layouts, and finishes that complement each property. From refreshing tired gardens to developing completely new outdoor areas, we manage each project with care and attention to detail. We aim to make every space more enjoyable, functional, and easy to maintain, while delivering dependable service and quality workmanship from start to finish.
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4.4

Top rated Extension Builders

Our Extension Builders in Brentwood, are rated 4.4 out of 5 based on 14 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Brentwood?

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

Find extension builders in Brentwood with MyBuilder

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

Step 2: Compare different extension builders in Brentwood

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

Step 3: Hire Brentwood extension builders with confidence

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

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

What to ask a Brentwood extension builder before hiring?

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

An extension builder in Brentwood 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 Brentwood 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 Brentwood?

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 Brentwood 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 Brentwood 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 Brentwood

Can an extension builder in Brentwood help with planning permission?

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

Many Brentwood 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 Brentwood help with materials and finishes?

Yes, most extension builders in Brentwood 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.