Extension Builders in Brentwood

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

Easily find verified Brentwood Extension Builders. Just post your job to get quotes from MyBuilder's Extension Builders in Brentwood.

Select a service

How it works

Post your job for free

Tell us about your job, and we’ll alert suitable tradespeople in your area. It’s simple and free.

Tradespeople respond

Once your job is posted, you’ll get responses from interested tradespeople through the website.

Review profiles and choose

Browse profiles, work history, and feedback, then choose who you wish to share your details with.

Some of our top rated extension builders in Brentwood

1983 Results

Sort by:

JAS Builder
No reviews yet
Extension Builder in Brentwood
I’m an experienced and reliable builder with over 7 years in the trade, specialising in loft conversions (including double bedrooms with en-suites), new builds, rear and side extensions, and full home renovations. I take pride in delivering high-quality work, sticking to deadlines, and making the process smooth and stress-free for my clients. Whether you’re expanding your home or starting fresh, I’m here to help bring your vision to life.
Get in touch
Build force lofts and extensions limited
No reviews yet
Extension Builder in Brentwood
We are a friendly building team of guys that has over 40years experience between us. We undertake any aspects of building but are specialists in loft conversions and kitchen extensions. We have worked in london for the last 15years and are now looking to bring in work more locally to us. We are here to advice and help you through you building experience.
Get in touch
Cotswold Edge Gardens
Rating: 1 out of 5
Extension Builder in Brentwood
Cotswold Edge Gardens creates thoughtfully planned outdoor spaces that bring together natural beauty, practical living, and lasting character. Our approach focuses on understanding each property and designing gardens that feel comfortable, balanced, and naturally connected to their surroundings. From carefully positioned planting and elegant pathways to inviting seating areas and well-structured borders, every detail is considered with purpose. We value quality workmanship, reliable service, and clear communication throughout every project. Whether refreshing an existing garden or creating a completely new landscape, we aim to deliver spaces that are enjoyable, easy to maintain, and built to remain attractive through changing seasons.
Get in touch
Latest review:
Fencing- 4 Oct 2026
Very pricey don’t bother silly quote over 200£ over four over quote just for a side gate 450s madness
BWbrickwork LTD
No reviews yet
Extension Builder in Brentwood
Hello. My name is Brian and I am the company owner of BWbrickwork LTD. With over 25 years experience. We have worked on some of the biggest projects across Essex & the South East. We specialise on new builds “Houses, Extensions, Garden/boundary walls.” We have worked with national wide companies such as “Redrow homes, Bellway homes, St Modwen” - we have also worked on behalf of smaller developers as well. But now we have moved into the domestic market as well. Our politeness, professionalism and attention to detail has always been of the highest & robustness when it comes to our workmanship. With NVQ 2/3 - SMSTS, SSSTS, SMAS, CQMS qualifications to add to that. We come with full Public liability & indemnity insurance as well.
Get in touch
M.H.W Building Contractors
No reviews yet
Extension Builder in Brentwood
We are a small, family run business in south east London with over 35 years experience in the construction industry. We cover London and the south east of England. We cover work from kitchens and bathrooms all the way to complete new builds and everything in between. We take great pride in all work we carry out and are not satisfied until every job is complete to the highest quality.
Get in touch
PS Brick Block &Home Improvement LTD
Rating: 4.7 out of 5
Extension Builder in Brentwood
All type of building works to high standards. - extensions - lofts - plumbing - electric - decorating - new build - patios - driveways
Get in touch
Latest review:
Extensions- 4 Nov 2023
Overall me and my husband are very satisfied with the workmanship and with the final result of our my fake cladded garage door with the new aluminium framed window. The original garage was converted into a habitable room 7 years ago with only a rooflight to bring light into the room, which is now my husband's office and this new window will make a lot of difference therefore we are very happy with the finished work. The work was done very quickly, the builders turned up on time and they were very efficient and helpful, they took particular care when installing the composite slatted panels to the marine plywood. The main contractor Pawel Speiwak also came on site to inspect the works during construction. The quote was also very competetive, a good value for money. I would definetely use them again for any future work in my house and recommend them to other people.
Pops Building Services Ltd
Rating: 5 out of 5
Extension Builder in Brentwood
I am a city and guilds advanced craft qualified carpenter/joiner With over 30 years experience in the construction industry. I was the director of a property development company. I’ve managed contracts for NHS trusts as well as private contractors. The types of work I normally undertake are loft conversions, extensions, renovations, kitchen and bathroom installations
Get in touch
Latest review:
Peter was the on-site foreman on our complete house renovation, which took just over a year. This included an additional ensuite pod bedroom in the roof and a side-return and extension to the kitchen. Peter was totally reliable throughout the project and thoroughly professional. Throughout this time we were living in the house with the children. He was always on time, managed the on-site team well and communicated clearly with us. His workmanship is high quality and he was also a stickler for checking the work of others and getting it updated if it wasn’t up to scratch. I have no hesitation in recommending Peter.
Raed construction ltd
No reviews yet
Extension Builder in Brentwood
We are london based team of a professional buiders. All Raed Construction Ltd have many years of experience, trade, skills, willingness to get the work to a high standart in time and on budget. The experience acquired on these large, complex schemes have helped shape our company’s expertise, using the same guiding principles on every project, whatever its size and type.
Get in touch
Hay Construction
No reviews yet
Extension Builder in Brentwood
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.
Get in touch
Ismail Mohammed
No reviews yet
Extension Builder in Brentwood
I enjoy getting involved with clients from initial stages. Preparing design and construction documents, and making amendments as required. Completing drawings for planning, building regulation, Loft Conversion and Extension.
Get in touch
Shedcraft & Co LTD
No reviews yet
Extension Builder in Brentwood
We specialise in designing and building high-quality granny annexes, garden rooms, and bespoke sheds. From concept to completion, we deliver fully insulated, durable, and beautifully crafted spaces tailored to your lifestyle. Whether you need extra accommodation, a home office, or a functional outdoor room, we create practical, stylish solutions built to last.
Get in touch
Duka tarmac
No reviews yet
Extension Builder in Brentwood
I been doing tarmac over 20 years now and I would like to open my on company
Get in touch
Per.construction
No reviews yet
Extension Builder in Brentwood
My name is bardhok I have over 13 years experience on construction Am specialised in full house refurbishments Loft converted extension House maintenances Landscaping
Get in touch
Expert solutions
New on MyBuilder
Extension Builder in Brentwood
We are a very steady team and deliver high quality work
Get in touch
K R E Roofing and Building
Rating: 5 out of 5
Extension Builder in Brentwood
I run a well established business, with over 20 years building experience. I work with a team of qualified professional tradesmen, to deliver your building needs. Prices are very competitive and quotations are free of charge. I have Public liability insurance. I am new to MyBuilder hence awaiting to be selected for jobs, and the 0 feedback rating, I have reference available if required.
Get in touch
Latest review:
Good prompt service and most importantly a job well done
Mackintosh Builders
No reviews yet
Extension Builder in Brentwood
17 years in the trade. I am a carpenter/multi-trader with a great team of builders. All aspects of building work undertaken. All your building work under one roof. Loft conversion, extensions, refurbs, bathrooms, kitchens, plumbing, electrics, steel work, wood work, Removal of walls/chimneys, etc
Get in touch

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.

Quality screening

Easily find verified local tradespeople. Just post your job to get quotes from tradespeople near you across the UK.

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.