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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Grandiose Construction ltd
Rating: 5 out of 5
Extension Builder in Brentwood
Grandiose Construction ltd is a registered member of the Federation of master builders and we are a qualified insured and trustworthy property builder/developer. Our expertise varies from new builds/extensions to bedroom, kitchen, bathroom remodelling and gardening. With over 15 years work experience, during which I ran a team of Trades for lots of luxury home Developers in London.This background has enabled me to develop steps and sequences to carefully create your desired project.
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Latest review:
Kitchen Fitting- 1 Mar 2025
Ade is good man, he's very punctual, quality of work is commendable. Thank you Ade.
Ali builder
Rating: 5 out of 5
Extension Builder in Brentwood
Hey I go with the name of Ali builder! I been working in the building field for the last 20 years and have got many clients and every client I work for I make sure I do the 100 percent perfect !
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Latest review:
Mr Muhammad is a great guy with a lot of skills and he was refer to me by friend and he has done my work very nice and on time . Very professional man with great sense of hummer
Billericay Innovations
Rating: 1 out of 5
Extension Builder in Brentwood
We are a family run business, specialising in Extensions, Garage conversions, kitchen installations, bathrooms, and all electrical installations.
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Latest review:
Conversions - General- 12 Mar 2026
I had a quote from this company, they did not carry out any work for me, as found them to be very expensive.
Crown Building Services
Rating: 5 out of 5
Extension Builder in Brentwood
Crown Building Services is a family run carpentry and construction company based in Essex. We have 45 years combined experience in carpentry first and second fix and 15 years experience in extensions, loft conversions and general construction. With a keen eye for detail we pride ourselves in completing all our work to an extremely high standard, as well as being trustworthy, honest and reliable tradesmen. No job too big or small with free no obligation quotes.
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Latest review:
Extensions- 10 Sep 2019
Do not hesitate to use these guys. Nothing is too much for them. Rob and his team built my kitchen extension and I am over the moon with the work. Rob is a perfectionist and from day 1 was personable, professional and 100% trustworthy. The plumber, electrician, bricklayer, tiler and carpenter that were used were top class. They all made the whole process so easy. I would wholeheartedly recommend this company and their team. If you would like to come and have a nose, just let the company know and I am happy to show you their work. Any changes that we made along the way were taken on board and everything is perfect and exactly as we wanted. The guys never cut corners. Thank you for our beautiful extension. It has changed the way we live for the better.
Dziwota Construction Limited
Rating: 5 out of 5
Extension Builder in Brentwood
Hi my name is Kamil. We specialise in house extensions, full refurbishments, conversions, structural alterations and installation of kitchens and bathrooms. We also complete our projects in plastering and decoration to a universally high standard. Free quotations!
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Latest review:
Extensions- 31 Jul 2015
Kamil and team have been an absolute joy and a pleasure to work with during the construction of our kitchen extension. They are incredibly hard working, every morning 7.30am starts and when needed working weekends as well. Every little extra we have asked for has been no problem at all, solutions have been found to everything. Not only have they built the extension but made sensible and welcome suggestions to how things could be done differently for a better effect -e.g the lighting, sockets, boiler set up. All work is completed to the highest standards and cleaned up afterwards. I would have no hesitation in recommending them to anyone, we have already employed them to overhaul the shower and heating in the rest of the house later in the year. 5 STARS
Nicely Done Always
Rating: 5 out of 5
Extension Builder in Brentwood
Our success is a your happiness. We strive on achieving high standard finishing to achieve high level of customer satisfaction. With us you can’t go wrong. From kitchen and bathroom renovation, to landscaping and gardening work we do it all. So lets get in on and make it happen.
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Latest review:
The guys from NDA have really have executed the works i wanted carried out on another level. The tiling in the bathroom is just lovely. The whole bathroom feels so different i still cannot believe it. Well above my expectations if im honest. Thanks guys. i will definitely be in touch on my next project.
AJ FAMILY LTD
Rating: 4.4 out of 5
Extension Builder in Brentwood
AJ FAMILY LTD construction company specialising in refurbishment,loft conversions, single and double story extensions,kitchen and bathroom installation.company is VAT registered since 2016 ,but my personal experience in construction trade starts in 2000. WE always treat client with respect and doing our best to achieve value and money balance also overlooking every case individually ,not just dropping rate price . AJ FAMILY LTD -CONSTRUCTION YOU CAN COUNT ON .
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Latest review:
Handyman- 27 Feb 2021
Great communication from a very friendly guy. Work was done professionally and without fuss and he even did some extra bits and wouldn't accept anything over the already agreed fee. I cannot recommended Antonas highly enough!
Harinder singh
No reviews yet
Extension Builder in Brentwood
I am professionally doing working
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T&D BRICKWORK LTD
No reviews yet
Extension Builder in Brentwood
We are trustworthy professionals who won't disappoint your expectations. We do our jobs at a very high standards because customer satisfaction is always a priority. Always ready to give an advice where needed. Our quality team can help you with: · Brickwork and Blockwork on extensions · Garden walls · Sheds and Summerhouses · Pointing · Structural repairs · Brickwork repairs and restoration · New Build
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KS builders
No reviews yet
Extension Builder in Brentwood
We can handle simple and complex jobs on time and with good price. We do all kind of jobs like painting and decorating, tiling, garden slabs, bath renovation , roofing , plumbing , electric , wood flooring , fix kitchen , skimming and maintenance etc…
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Mikes carpentry
No reviews yet
Extension Builder in Brentwood
I’m a 43 year old with over 20 years experience in the trade , i build extensions,summer houses ,roofs & I do a lot of interior work to ie ,media walls ,skirts & doors or bespoke units
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Fox Conversions limited
Rating: 5 out of 5
Extension Builder in Brentwood
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
JP’s Brickwork/Restoration
Rating: 5 out of 5
Extension Builder in Brentwood
I'm a bricklayer with 30 years experience, I also undertake many general building works. I produce quality work and am always ready to give advice where needed, brickwork and restoration is my normal workload but do undertake a lot of landscape works. I am based in Essex and work in and around the surrounding counties, polite reliable service given everytime. I pride myself on making the customer happy with the work I complete.
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Latest review:
Extensions- 21 Mar 2019
Really nice bloke. Honest, reliable,keeps you updated on what's happening and the next steps. Will give any advice when needed. Not pushy,and looks to look after customer as best as possible regarding cheapest option available. Very tidy, and does a really good job. Would have no trouble in hiring Jim for any other work required. Fully recommend.
P. Obrien
Rating: 5 out of 5
Extension Builder in Brentwood
I’ve been in the building trade for 25 years as a multi trade. Taking on jobs from putting up shelves to erecting new builds
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Latest review:
Plumbing- 23 Nov 2019
Peers carried out the job to a very high standard. He took his time to ensure it was done correctly. The price was in line with my expectation. I would hire him again. Thank you!
Building Services Essex Limited
Rating: 5 out of 5
Extension Builder in Brentwood
Based in Rayleigh, Essex. We offer a team of skilled trades people, specialising in home renovations including structural alterations and extensions. Fully insured and all works guaranteed. No obligation estimates.
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Latest review:
Conversions - General- 18 Apr 2026
Mark and his team did a fantastic job from start to finish. Communication was great from day one and every care to protect our property whilst carrying out the work, and clearing up afterwards was done to the highest level with next to nothing inconveniencing our home. If you are looking for a top quality building team, you can rest assured this company is of the highest quality for your project, and at a very fair price.
Carnot Construction Limited
Rating: 5 out of 5
Extension Builder in Brentwood
Carnot Construction are committed to ensuring our clients are satisfied from beginning to end, we aim to take the stress out of building work and complete all projects as swiftly and cleanly as possible. We ensure our clients are in safe hands with strict contracts in place to protect both parties. We specialise in Extensions, New builds, Loft Conversions, General Conversions, Kitchen and bathroom renovation/fitting.
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Latest review:
Extensions- 15 Aug 2018
100% RECOMMENDED Michelle and her partner measured up and competitively quoted within a short space of time. She was then very patient and supportive when unforeseen planning issues popped up and set the start date back by quite some time. Once building started, all questions were promptly answered by either the site manager or Michelle, both being available at all times. I was away for the duration of most of the job and it was very reassuring to know that I was leaving it all in capable and honest hands. The workers were very proficient and tidied up after themselves at end of each day. They also put in some very long hours at times to hasten the work. I was also impressed by the handling of unexpected problems during the building (mainly invasive tree stumps!). I am absolutely thrilled with the end result. High quality workmanship and a beautiful building which I am sure will last many years. I would certainly recommend them without a doubt.

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.