Extension Builders in Newhaven

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4 (4 reviews)

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Some of our top rated extension builders in Newhaven

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Brockwitz Interiors
Rating: 5 out of 5
Extension Builder in Newhaven
I am a passionate cabinet maker and joinery specialist with over 15 years experience. I have trained and worked for one of londons most reputable bespoke furniture and cabinetry companies and am able to provide the full Profesional package from design to installation. Above all i believe in honesty and in doing the job the right way, the first time. work garaunteed and references avaliable upon request.
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Latest review:
Carpentry- 21 Nov 2016
George designed, built, installed a set of custom-made doors for under my stairwell. Lovely guy, very courteous and pleasant to have around, and the work was precise and pleasing. I had one or two tweaks I needed done to the doors after the job had been completed which he helpfully came back and did for me. Happy to recommend him.
BM Carpentry and Construction
Rating: 5 out of 5
Extension Builder in Newhaven
BM Carpentry and Construction is a City and Guilds qualified business specialising in all aspects of Carpentry and Construction.
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Latest review:
I would recommend Billy to everyone. After so many bad experiences with builders (I'm doing a full renovation) I was recommended Billy by a friend and I couldn't be happier! Nothing was too much bother and I was able to go on holiday and I came home to a finished bathroom, doors hung, a media wall, skirting. I am just about to use Billy again for another project in my home. He is professional, trustworthy and so reliable and he goes out his way to make sure you're happy. I'M VERY VERY HAPPY! Thank you Billy for everything you have made me fall in love with my home.
Custom Design & Construction (Sussex) Ltd
No reviews yet
Extension Builder in Newhaven
We deliver the very best customer service and quality workmanship in our trade. Our commitment is to provde your with the highest building standards whatever size of job, big or small. We specialise in many builder trades including Loft conversions, extensions, repointing, bricklaying, roofing and roof repairs, plus general property maintenance. You can find out more by visiting our website. We take pride in our work; it makes us happy and makes our customers happy too.
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Quick-Brickz
New on MyBuilder
Extension Builder in Newhaven
Quick-Brickz is a professional brickwork and building company dedicated to delivering high-quality workmanship, reliable service and attention to detail on every project. We specialise in brickwork, extensions, alterations, repairs and general building work. Whether it’s a small repair or a larger project, we take pride in getting the job done properly, with a strong focus on quality and customer satisfaction. We believe in clear communication, honest advice and keeping our customers informed throughout the job. We work professionally, maintain a clean and tidy site, and always aim to deliver a finish we can be proud of.
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GM building
Rating: 5 out of 5
Extension Builder in Newhaven
Hi I am Michael , I have been bricklaying & building houses for over 35 years & I have managed sites with up to 30 bricklayers at a time. With me and my son in law joe we have built all kinds extensions , garden walls , steel work , repointing , driveways and even fencing to add to our long list of skills and knowledge within the building game. My son Wesley is a roofer so when ever a job comes that requires his expertise we will have all customers covered and happy they have chosen us at their contractors. We can work all over Sussex and there isn’t a job too big or small that we can’t help you with. All of our customers would be happy for you to see our work first hand and hope to build up an even bigger and better customer base now that we are on my builder.
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Latest review:
Repointing- 14 Jun 2024
Joe and his Father are straight dealing, competent, honest and reliable. They did a very good job at a reasonable price. Joe's Father has decades of experience and knowledge and Joe had plenty of energy to attack the job. A third member of the team came in on the second day to help finish the job. A great combo! Repointing around the brickwork of 8 x windows with repair and repaint to window surrounds and masonry. Arrived on time! Finished on time! Cleaned up! Did the job to a high standard. This is not to be taken for granted in this trade and I had a couple of other chancers quote for the job who tried to phase me with very silly high prices at more than double the reasonable job value. So my recommendation is that you have Joe around to offer an honest quote and give this team preference and priority as a safe and satisfactory benchmark to get it done without fear of being ripped off or of having bodgers on the job. RECOMMEND RECOMMEND RECOMMEND!!
Fortis Construction and Maintenance
Rating: 5 out of 5
Extension Builder in Newhaven
We cover all aspects of construction from a small face lift for a tired kitchen to a two storey extension or even a complete new build. Fast, friendly and reliable service. Please contact for a free quote. Established for over 14yrs we have grown a good reputation based on reliability, quality of work and communication with clients.
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Latest review:
An excellent job from start to finish. FORTIS were flexible with the garden design, created a new patio seating area and paths, improved the drainage, weeded horrendously overgrown shrub beds, levelled and returfed the lawn and created new flower beds. Also, while working on the garden, Peter and his team created me a new cloakroom from scratch, improved the storage and electrics in the garage and installed a fire door between the house and the garage. All this was achieved to a highly professional standard and I am delighted with the results. Peter is knowledgeable, adaptable and an excellent communicator. He and Sean were always where they said they would be, on time, and with a friendly laugh and a smile. Materials and other members of the team (electricians, gardeners, decorators, etc.) appeared when needed, as if by magic - so I know Peter's project management is good. I cannot recommend FORTIS C&M highly enough. Indeed I've already asked them to quote for three more jobs! I must remember to get in more biscuits though, eh Sean?!
Toby Kemsley
No reviews yet
Extension Builder in Newhaven
General builder, custom bar and garden design and landscaping
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King's Carpentry and Construction
Rating: 5 out of 5
Extension Builder in Newhaven
(KC&C) Kings Carpentry and Construction take on all aspects of Carpentry and aim to complete all tasks to a high Standard. There is no job too big or small, we do it all.
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Latest review:
Carpentry- 11 Jan 2023
Kevin did an amazing job putting up our new shed in a short space of time. He worked hard and diligently through horrible weather, and we're really grateful for the efficient and high-quality work. We'll definitely be calling him back for future projects, and would highly recommend!
Ward developments
Rating: 5 out of 5
Extension Builder in Newhaven
Professional carpenter and general builder delivering high-quality workmanship across all aspects of home improvement. Specialising in roofing, carpentry, internal renovations, media walls, flooring, and bespoke storage solutions. Reliable, tidy, and committed to completing every job to a high standard with clear communication throughout. Fully insured. Quality work done properly.
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Latest review:
Carpentry- 21 Mar 2025
Great job. On time and great Value for money. Excellent craftsmanship. Big thumbs up
DJM Building Services
Rating: 5 out of 5
Extension Builder in Newhaven
I started my business 15 yrs ago, have worked in the building trade for 30 yrs. I do anything from small one day jobs, to extensions, loft conversions, driveways, new roofs.
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Latest review:
Guttering- 7 Aug 2018
Fantastic, reasonable prices. Friendly guys. Wouldn’t hesitate to hire again. Issue resolved quickly and efficiently, leaking guttering over a conservatory, even did a rain dance to ensure problem was resolved 😀
Neil Jamieson Subs to Structure
No reviews yet
Extension Builder in Newhaven
Hi I’m Neil I have approximately 35 years experience in construction ie brickwork and groundwork’s all forms.
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Southern extensions
Rating: 4.1 out of 5
Extension Builder in Newhaven
We have over 30 years experience in all aspects of building. Starting in London and now covering the south coast. This includes the maintaining of residential properties as well as loft conversions/ extension's /basement's / kitchens / bathrooms/ decorating (internal and external) /brickwork / plastering / plumbing. All trades workers are fully qualified. Properties are left clean and tidy at the end of each day. Work is guarenteed and fully insured. we only fully compleat one project at a time are based in Hove / eastgrinstead / Eastbourne We cover from Eastbourne to Worthing and up to Crawley
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Latest review:
Extensions- 13 Nov 2019
Mark managed the whole job (which was complex and involved three different rooms; change of use and new build) effectively and efficiently and engaged family members and friends in various trades as needed. With extensive experience Mark was able to make suggestions and put forward many ideas to improve the basic plans that we had which was most helpful. This included raising a ceiling level to a better height than we had envisaged possible and removing the need for a pier so that a wall could be flat throughout the new kitchen. Mark has a good eye for the aesthetics of a job. He is also very amenable to adding on extra smaller jobs in the process and even procuring some materials that I wanted in order to do something myself ! The workmanship and finish is high quality for a competitive price. I would not hesitate to recommend Mark and have, in fact, already done so for another couple of potential jobs. Finally, Mark is a really nice guy and great to have a chat and cup of tea with (two sugars!)
Everoak Projects
New on MyBuilder
Extension Builder in Newhaven
EverOak Projects is built on a passion for quality craftsmanship. With over 10 years of carpentry experience, we specialise in first fix, second fix, bespoke joinery and kitchen installations. Every project is approached with precision, care and pride, creating timeless spaces that are built to last. 🌳
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JT PLUMBING & HEATING
Rating: 5 out of 5
Extension Builder in Newhaven
JT PLUMBING & HEATING Over 10 years experience in domestic & commercial plumbing and heating. Free quotes 24 hour call out service
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Latest review:
Bathroom Fitting- 3 Nov 2017
Couldn't be happier with our new bathrooms. Jack was the perfect choice for our project and helped us make our plans even better by providing honest and professional advice. The team he recommended are also second to none and they have worked tirelessly to achieve superior results to our expectations. The project was clearly mapped out for us so we understood in what order what was happening, and when we met a challenge, Jack provided a variety of options that we could chose from. Would definitely recommend Jack for your project.
Halo Carpentry
Rating: 5 out of 5
Extension Builder in Newhaven
Halo Carpentry specialises in all aspects of carpentry, with a focus on internal doors & fire door installations, inspections, and remedial works, and we are accredited by FireQual. We work across both domestic and commercial properties, ensuring all carpentry and fire door works are carried out to the correct standards and procedures. The Halo Carpentry team make sure the job is done correctly, on time, every time. Just read our 28+ MyBuilder reviews to show how we reflect this. Please feel free to contact us via our Halo Carpentry website if you would like a more competitive quote. We are currently offering a massive 10% off on Website Call quotes for the August Month!
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Latest review:
Carpentry- 11 Aug 2026
Excellent, high quality work completed by Luke. Great communicator. Impressed & planning to use his services again to complete further projects in our house. Well done. Kelvin
SJH Building Co Ltd
Rating: 5 out of 5
Extension Builder in Newhaven
SJH Building Co manage a various scale of building and development projects in East Sussex and surrounding areas. We are a small hard working team of construction professionals, We strive to provide the highest quality, with customer satisfaction being the main goal of every project. We are a fully insured, limited company
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Latest review:
Landscaping- 14 Aug 2022
Excellent job and 100% satisfied with the end result. Steve is very reliable, hard working and concientious. He has an eye for detail and takes a lot of pride in his work. Everyone who has visited me this summer has been amazed and have all commented on the standard of workmanship. Steve is such a lovely guy it was a pleasure having him work here. Very highly recommended and I'm extremely fussy!👌

Top rated Extension Builders

Our Extension Builders in Newhaven, are rated 4 out of 5 based on 4 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Newhaven?

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

Find extension builders in Newhaven with MyBuilder

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

Step 2: Compare different extension builders in Newhaven

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

Step 3: Hire Newhaven extension builders with confidence

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

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

What to ask a Newhaven extension builder before hiring?

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

An extension builder in Newhaven 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 Newhaven 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 Newhaven?

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 Newhaven 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 Newhaven 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 Newhaven

Can an extension builder in Newhaven help with planning permission?

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

Many Newhaven 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 Newhaven help with materials and finishes?

Yes, most extension builders in Newhaven 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.