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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Design build manage ltd
Rating: 5 out of 5
Extension Builder in Newhaven
I’m Joe Mitchell, Director of Design Build Manage Ltd, with over 20 years’ experience in the building industry. We specialise in extensions, loft & garage conversions, structural alterations and complete renovations. We can manage your entire project from start to finish, including drawings, planning, structural engineering, Building Control and construction. Professional, reliable and fully managed — from the ground up.
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Latest review:
We had a really positive experience with Joe and the team at Design Build Manage and would highly recommend them. From the outset, the quotation was excellent — very clear, detailed and easy to understand, with a full breakdown of the works and a sensible staged payment schedule. This gave us a lot of confidence going into what was a fairly substantial project. Joe was very hands-on throughout and was on site most days. Communication was always clear and responsive, and we always felt we knew what was happening and what the next stage of the project would be. The whole team were incredibly friendly and considerate, particularly as we were living at the property throughout the works with young children and a dog. They were always respectful of our home, tidy and genuinely pleasant to have around. The project did run a few weeks beyond the original schedule, but this was largely due to unforeseen circumstances that arose during the build, and we were kept informed throughout. Most importantly, we’re extremely happy with the finished work and the way the whole project was managed. I wouldn’t hesitate to recommend Joe and the Design Build Manage team for any building project, big or small.
Oracle glazing & repairs ltd
Rating: 4.8 out of 5
Extension Builder in Newhaven
With over 25 years of industry experience, Oracle Glazing is your trusted partner for premium window and door solutions across Sussex. Based in Worthing, we proudly serve homeowners, businesses and trade professionals alike, delivering exceptional dedication to quality. Our partnerships with leading brands, such as Origin and Decorio, allow us to offer cutting-edge solutions, tailored to your needs. We provide a range of glazing services, ensuring every project is handled with the utmost care and precision: At Oracle Glazing, we’re proud to have built a reputation for delivering reliable, high-quality results and outstanding customer care. Every project, whether it’s a minor repair or a full window and door installation, is treated with the same attention to detail and dedication. Whether you want to restore heritage windows or install modern Origin bi-folds, we’re here to help From sleek, modern double-glazed windows to stylish, secure doors, we supply and install a variety of options, tailored to your requirements. Whether you’re looking to enhance the natural beauty of your home or create a stunning storefront for your business, we can help.
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Latest review:
Windows & Doors (uPVC & Metal)- 7 May 2026
Following contact with the trader and resolution of the initial communication issues, this review has been updated as a temporary placeholder while works are ongoing. At present, the customer has confirmed that communication has resumed and the project is proceeding as agreed. As the works have not yet been completed, a final review cannot fairly be given at this stage. The customer remains hopeful that, upon successful completion of the project, this review can be updated to reflect the full experience positively.
Grinstead construction
No reviews yet
Extension Builder in Newhaven
Hi my name is Dean Hutt. I am the owner of Grinstead Construction, which I started in 2003 after being in the industry since the age of 16. I have many years of experience under my belt. I have a team of trades people who work with me. We are fully insured and no job is to big or small customer satisfaction is our main aim. Quality and value for money.
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Site Engineers Direct Ltd
No reviews yet
Extension Builder in Newhaven
All aspects of building including extensions, loft conversions, conservatories, double glazing, roofing, carpentry, plumbing, electrical, brickwork etc
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Cosmin Construction & Consulting LTD
No reviews yet
Extension Builder in Newhaven
General Contractor with experience in all stages of building work from foundations to final finishes. Most of the work is done by my team and specialist jobs are sub-contracted. I can manage the whole process and provide clarity and simplicity of the the work.
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Sussex Interior Solutions LTD
No reviews yet
Extension Builder in Newhaven
At Sussex Interior Solutions we bring reliability and attention to detail in every project. Our team of skilled carpenters and builders pride themselves on delivering a high quality end result for the customer ensuring it suits there wants and needs. With years of hands on experience in the building industry our team specialise in many aspects of the building industry. Whether you're upgrading your home, fitting out a commercial space or starting from scratch, Sussex Interior Solutions are ready to bring your vision to life on time and on budget.
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Ktech Group LTD
Rating: 5 out of 5
Extension Builder in Newhaven
We are a construction company that specialises in compliance works and social housing. We work with the best engineers to ensure our projects are carried out successfully with the best appraisal possible. Contact us today to discuss your project and set up a consultation. Our service areas include London, Kent and Southern East counties.
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Latest review:
Carpentry- 7 Aug 2025
Ash and his team from Ktech did a great job installing the flitch beam to structural spec. The job required real effort, coordination and attention to detail and they delivered. Professional, reliable and easy to work with. I’d strongly recommend them.
IBuilt Services LTD
Rating: 5 out of 5
Extension Builder in Newhaven
We provide friendly, skilled & professional services when you want them 'we are there when you need us there' We strive to dispel the old image of a small builder, with smart systems for appointments and emails and will always return your call. We like to treat each project as if it was our own, in our home, be it big or small. Your journey starts here with iBuilt Services Ltd
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Latest review:
Extensions- 19 Dec 2017
Highly recommend Dan & team. Polite and professional and great workers many thanks.
Klyra Management Consultancy Ltd.
No reviews yet
Extension Builder in Newhaven
Welcome to Klyra – Self-Build Construction Management Experts At Klyra, we empower homeowners to take control of their own building projects with expert virtual support. Whether you're planning a home extension, loft conversion, or full renovation, we provide step-by-step guidance in budgeting, contractor coordination, project planning, and quality control. Our clients typically save up to 20% on build costs by managing their own project with our expert assistance—without the need for a traditional project manager. With over 20 years of experience in the construction industry, we’ve helped countless homeowners navigate their projects smoothly, confidently, and cost-effectively. If you want to stay in charge of your build while avoiding costly mistakes, we’re here to guide you every step of the way. Contact us today to learn more or book a free consultation.
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Kepa Property
Rating: 5 out of 5
Extension Builder in Newhaven
Hi, My names Kelly, my company KEPA property started around 7 years ago as a cleaning contractor. Over the last few years we have found that our customers want a level of service and standards that can be hard to find. We decided that we would build a team that could meet our customers needs. So as we have found tradesman who are reliable, skilled and who could deliver the highest standards, we have built our maintenance and construction team.
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Latest review:
Handyman- 26 Nov 2020
Rupert was most efficient and helpful in sourcing a suitable extractor fan to replace my old one. He’s punctual, friendly, knowledgeable and I am really pleased with the finished result.
Southland Landscapes & Building
No reviews yet
Extension Builder in Newhaven
All aspects of Landscaping, tree surgery and building work undertaken. We are Reliable, friendly, professional and have a keen eye for detail. Get in touch for a free no obligation quote!
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K.T Building Services
Rating: 5 out of 5
Extension Builder in Newhaven
We are a small building company that carry out loft conversions, extensions, renovation and all general building works. I have been a builder for 12 years and have always had happy clients.
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Latest review:
Fencing- 16 May 2017
Karl at KT Building Services did a great job replacing a damaged post and fence panel in my garden. He arrived on time, got straight to work and hauled away all the rubbish. I would definitely use his services again and would recommend him to all.
Harmes Constructon Ltd
No reviews yet
Extension Builder in Newhaven
Harmes Constructon is a small family run business with years of experience in this trade. Because we are a small company are reputation is important to us so every job is complete with 100% effort we are not happy till are customers are happy. Attention to detail is a big factor for each and every one of are team. We we always give you the best advice possible we don’t want are clients spending unnecessary money on unnecessary things we can help cater To every budget. Feel free to get in contact for a free quotation
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Tjs building services
No reviews yet
Extension Builder in Newhaven
My name is Tony. I have 30 years experience in the building trade. Covering listed buildings. Heritage buildings. New buildings. And all maintenance aspects. I have a good subcontractor relationship . With the same trades I use on all my jobs. If needed. I'm based in Haywards heath. I have full insurance. And have recommendations that can be supplied.
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tops developments
Rating: 4.9 out of 5
Extension Builder in Newhaven
We undertake all type off building work, plumbing, heating, gas works,kitchens, bathrooms, refurbishment, extension, and small jobs. With over 8 years experience in industry, work warranties, qualified professionals. Our subcontractors and employees are professionals with experience. We are looking forward to hear from you. Thank you.
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Latest review:
Gas Work- 23 Dec 2025
Friendly, professional and fair with good communication. Would recommend
S&A construction
No reviews yet
Extension Builder in Newhaven
Free quote for driveways patios extensions any general building and landscaping with over 15 years experience
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Top rated Extension Builders

Our Extension Builders in Newhaven, are rated 4 out of 5 based on 4 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 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.