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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crown construction southern ltd
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Extension Builder in Newhaven
Crown Construction is a well-established Southern construction company specialising in domestic extensions, renovations and a wide range of construction projects. As proud members of the Federation of Master Builders (FMB), we are committed to delivering high standards of workmanship, professionalism and customer service across every project we undertake. We provide a complete range of building services, managing projects from initial concept and planning through to construction and final completion. With proven industry experience, skilled tradespeople and a strong focus on quality, we work closely with our clients to deliver projects safely, efficiently and to the highest standards. From concept to completion, Crown Construction brings your vision to life.
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Latest review:
We used Luke on our house extension project and were extremely impressed from the start. The quotation detail was miles ahead of anything else we received and this level of standard was kept throughout the works through the completion. High standards Great communication On time and on budget Highly recommend
O'connors building services
Rating: 5 out of 5
Extension Builder in Newhaven
We specialise in maintaining old and new properties, we even construct new buildings. We carry out remedial works to prevent your property going into disrepair. Having over 27 years experience in the building profession, there is not much that we do not know within the construction industry. We strive for nothing less then top quality work , we take pride in the jobs we take on. We work within your budget. If you have any questions relating to your project then please get in touch.
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Latest review:
Handyman- 22 Sep 2026
Great work! Would recommend.
FT Carpentry & Building
Rating: 5 out of 5
Extension Builder in Newhaven
I’m Frazer, I have over 20 years experience in carpentry and building works. I have completed many projects ranging from hanging doors to loft conversions and full renovations. I take pride in my work and ensure it is carried out to a very high standard.
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Latest review:
Frazer completed our loft conversation for us and we cannot recommend him highly enough. Nothing was ever too much trouble and his skill-base in what he does is very impressive. The work he carried out for us in the end ranged from a loft conversion with en-suite to the removal of two walls on ground and first floor and even re-laying solid oak flooring throughout our ground floor for us too. Not only did he do the work above but he helped us achieve our dream space by being so amenable to our requests to make adjustments as we went along, even creating a bespoke crafted skirting board so that we could have our picture window at the height we wanted. In addition he designed and created beautiful fitted wardrobes into our eaves space and wooden windowsills through-out using wood we had sourced and wanted to use. Throughout the work he was always professional, considerate and communicated continually with us around what we were wanting. He stayed with us the entire time, focused on getting our job completed rather than jumping onto other jobs and he worked so hard every day, always available throughout the work taking place if we needed to check anything. What we appreciated the most from Frazer was how regularly he communicated with us about what was coming up so that we could make the decisions we wanted to make along the way, without feeling as though changes were being made outside of our preferences. The work being done was made to feel very easy from our side where Frazer is so experienced and self-directed, arriving promptly every morning and working hard all day whilst always being open to talking anything through whenever we wanted which was so reassuring for us. Frazer is professional and warm as an individual and we were really grateful for how he communicated and liaised so politely and considerately with our neighbours throughout the work. He is always happy to be guided by his customer which we found a huge benefit as we often had our own ideas of what we wanted but when we encountered problems we found him to be very creative and he often found solutions to problems that we hadn’t thought of. He suggested using the dead space we had in our en-suite to create a tiled recessed space for our toiletries and also suggested adapting another dead space in the bedroom by making a hidden shelving space which has been invaluable to us as we work from home. Frazer’s work ethic is instantly evident and by working as hard as he did every day it meant that he finished the job ahead of schedule which we were so grateful for. We are utterly delighted with the work he has done for us and we have requested him back since to do some additional smaller jobs. As someone who is extremely reliable and skilled, we wouldn’t hesitate to recommend him to anyone needing work done.
LND PLASTERING AND REFURBISHMENTS
Rating: 5 out of 5
Extension Builder in Newhaven
LND Plastering & Refurbishments provides a complete range of professional building, plastering and refurbishment services across East Sussex. We specialise in plastering, skimming, rendering, plasterboarding, extensions, garage conversions, renovations and general building work. From small repairs and individual rooms to complete property transformations, we take pride in delivering quality workmanship, attention to detail and a reliable, professional service. We work closely with every customer to understand exactly what they want and deliver a high-quality finish from start to completion.
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Latest review:
Plastering- 25 Jan 2023
Marlon done a good job. I hired him has he is very local and I like to hire people close by. He done a fine job on the plastering with a nice finish. He also tracked a damp issue with an eye at looking and investigating this problem. So I would recommend him to future customers and would hire him again in the future.
Markmen builders
Rating: 5 out of 5
Extension Builder in Newhaven
At Marksman builders we are a friendly team off hard working tradesmen over 20 years experience in all brickwork extension repointing driveways patios decking We aim for quality #079219#59764#
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Latest review:
Landscaping- 27 Jun 2024
Mark was amazing with contact and letting me know what was happening each step of the way Worked quickly but to a high standard Great work I can’t fault him or his work at all Happy with the garden remodel recommend highly
rcm carpentry
Rating: 5 out of 5
Extension Builder in Newhaven
We have a fully skilled team of guys who always strive to go the extra mile. Having been in Mybuilder for all these years I was one of the first to start my positive feedback. We pride ourselves on taking on one job at a time and fully concentrating on that job, not spreading ourselves between jobs like many others. We offer visits to previous customers jobs to view our work. We can also offer a full design, build and plan submitting service if needed. Please read all my feedback
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Latest review:
Extensions- 31 Dec 2025
Rae and his team were excellent from start to finish. Always reliable and polite they completed a wrap around extension within the predicted 10-12 weeks and on budget which was faster and cheaper than anyone else we spoke to. Throughout the project Rae was organised and constantly communicating the progress, any snags and when things needed ordering. The finish of the work is top notch and they were amenable to carrying out extra bits of work along the way and quickly sorting any problems that arose. We would not hesitate to use them again or recommend them to friends and family.
Birchwood Carpentry & Construction Ltd
Rating: 5 out of 5
Extension Builder in Newhaven
Within East Sussex & with 20 years experience, we undertake all aspects of construction, renovation & carpentry work from start to finish; offering free initial meetings & free competitive quotes. We pride ourselves on our friendly, skilled, hardworking approach & being a contractor clients return to again & again. As members of the Federation of Master Builders & TrustMark, we have also been vetted, inspected & approved so you can be assured of a professional service with a high quality finish.
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Latest review:
Joinery & Cabinet Making- 4 Feb 2019
The final product is great and we are very please. The attention to detail, finish and general workmanship was great. They also did well dealing with an old build which is anything but straight. We would use them again and recommend them to others.
Kitson Services
Rating: 5 out of 5
Extension Builder in Newhaven
We are a small family run business, we have been running for 85 years. We can quote for all types of building works from a tap washer to a complete new build. Free advice and quotation with no obligation. Available 24 hours.
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Latest review:
Extensions- 27 Jan 2023
Mr Kitson responded very quickly and offered the cheapest 0f four quotations.
Aspire construction
Rating: 5 out of 5
Extension Builder in Newhaven
With 25+years experience in all aspects of the construction trade, we aim to deliver a friendly, competitive & high quality service to any job. We cover most of the south east of England, however we are happy to travel for the right project. We will walk through every job with the client so as they have a clear understanding of the schedule and happy to answer any questions to help put the clients mind at ease should they have any concerns. We cover anything from a tap change to an extension. Our love for work is with renovation projects and modernising homes, particularly bathrooms.
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Latest review:
My father once told me, son all you need in life is a fair priced hard working builder, a good wife and a cheap jeweler. 1 out of 3 is a good start!
M Marshall Builders
Rating: 4.9 out of 5
Extension Builder in Newhaven
Hi there, M Marshall builders is a family run business that has seen four generations of Builders. We specialise in newbuilds, extensions, patios, driveways, and all aspects of building work. Give us a call for a free quotation now.
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Latest review:
Extensions- 9 Sep 2021
Matt was very knowledgeable about the work being undertaken. He was very reliable, began on time and stuck to the quote he gave me. He itemised everything covered in his quote and delivered as promised. Very pleased with the results and would recommend to others.
Wayne hill
Rating: 4.9 out of 5
Extension Builder in Newhaven
I started as a General labourer just over 7/8 years ago, I have been involved with anything from extensions/roofing and gardens. I started building garden walls and laying patios and fencing for myself through mybuilder before working with a group in Birmingham building extensions, roofs, drives and patios.I have now returned to Sussex and looking to continue building down here. I take pride in my work and feel I provide a good friendly service for my customers at a good price.
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Latest review:
Repointing- 20 May 2025
Wayne Hill - what a fantastic job he did with my house. Thank you
TRH Brickwork Ltd
Rating: 5 out of 5
Extension Builder in Newhaven
General builder Ground works Bricklaying New builds Refurbishments Drainage Patios Extensions Driveways Garden walls
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Latest review:
Repointing- 21 Apr 2017
Tommy and Charlie rebuilt a 9m*2m flint block garden wall. Very courteous and helpful and left the site very tidy at the end. I would recommend to anyone.
Conserve Building Servcies Ltd
Rating: 5 out of 5
Extension Builder in Newhaven
We offer a complete building service and have over 20 years experience. We specialise in renovation and refurbishment and can give you a free detailed estimate on any works you require. We are fully insured and guarantee only the highest quality of workmanship.
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Latest review:
Extensions- 9 Jan 2018
Jon and his team are very professional clean and tidy punctual and carried out an excellent job for a competitive price. Will definitely always ask Jon first if I have any more building work. Great job!
J.A carpentry
Rating: 5 out of 5
Extension Builder in Newhaven
Hello, my name is jake. I am a carpenter of 12 years, I undertake all aspects of carpentry from start to finish. What makes me stand out is my finished product, effectiveness to the customers needs and time scale of job undertaken. Time keeping and punctuality is key for me, it shows you care.
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Latest review:
Kitchen Fitting- 23 Feb 2022
Highly skilled, quality workmanship. Modern ideas. Has access to other trades so makes getting job done easy. Very pleased with the work done on our kitchen.
McCoubrey Ltd
Rating: 5 out of 5
Extension Builder in Newhaven
I have been in various aspects of the construction trade for around a decade, with experience in a wide range of different tasks specialising in home renovations.
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Latest review:
Kitchen Fitting- 21 Sep 2026
Matt completed several jobs in my bathroom and kitchen including removing a bath and installing a walk in shower, skimming the ceiling, installing new worktops, tiling, fitting flooring vinyl, installing an eye level kitchen cupboard and microwave brackets, fire boarding an under stairs cupboard and painting. Matt also gave me advice about methods to reduce damp and mould in the bathroom. He always communicates well and his work is of a high standard. I am really happy with the finished results.
OJ Improve
Rating: 5 out of 5
Extension Builder in Newhaven
We’re Jon and Ollie — a joint partnership based in Brighton & Hove, bringing together a strong and versatile skill set across multiple building trades. With complementary strengths and a smooth, phase‑by‑phase workflow, we take pride in delivering reliable, high‑quality work from start to finish. With 15 years of combined experience, we cover a wide range of internal and external improvements, including: Plastering and rendering Garden improvements and landscaping Small home refurbishments General property maintenance and upgrades Together we offer a friendly, dependable service within a 20–25 mile radius of Brighton & Hove. We’re now building our portfolio here on My Builder and are committed to delivering work we’re proud of and that our customers are satisfied with.
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Latest review:
Plastering- 22 Feb 2026
Olly and Jon were good at communicating and have really ensured that the finish will last, they got the job done to a high standard. They cleaned up and managed working neatly. Much appreciated. :)
Highlander Brickwork
Rating: 5 out of 5
Extension Builder in Newhaven
Highlander Construction , 40 years experience, all works carried out to a high quality, to customers requirements and satisfaction
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Latest review:
Bricklaying- 1 Jun 2026
Quoted and booked in super quickly to repair an awkward hole in a garage. Job was completed to a really high standard - went above and beyond. Very polite and left the site cleaner than it had been to begin with. Definitely recommend!

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.