Extension Builders in Newhaven

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 5 (6 reviews)

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Some of our top rated extension builders in Newhaven

394 Results

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Easy Build
No reviews yet
Extension Builder in Newhaven
Local builder with over 30 years experience, bricklayer by trade. Can take on all aspects of home builds including landscaping
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Snipe Building
No reviews yet
Extension Builder in Newhaven
Hi I'm Mark I work with my son max. we do a range of work from patios to loft conversions, I've got over 25 years experience and fully insured.
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Base builders
Rating: 3.5 out of 5
Extension Builder in Newhaven
Founded by experienced tradesmen, we specialise in brickwork, repointing, concrete bases, fencing, garden transformations, and summer house installations. With years of hands-on experience, we pride ourselves on delivering high-quality workmanship across all aspects of landscaping and groundwork. From full garden renovations to structural brickwork and durable base installations, we offer a reliable, professional service with attention to detail on every project.
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Latest review:
I recently used them for a patio re-do. I had 47 metres of Indian sand stone and I was very impressed with the service from start to finish. The communication was clear and prompt, and they were able to schedule the work fairly quickly, which made the whole process stress-free. The team arrived on time, were friendly and professional, and carried out the work to a very high standard. Everything was completed efficiently, with great attention to detail, and it’s clear they take pride in what they do. They kept the workspace clean and tidy throughout and made sure everything was finished properly before leaving. It’s not always easy to find reliable tradespeople, but these guys definitely delivered. I would highly recommend them to anyone looking for dependable and high-quality property maintenance services. I’ll certainly be using them again in the future.
Blackwood building contractors limited
No reviews yet
Extension Builder in Newhaven
Blackwood Building Contractors Limited are a small building company based in Mid Sussex. David and Joss have over 28 years combined experience in the building industry. Specialising in all aspects of carpentry & timber framing. At Blackwood we undertake a large variety of jobs such as: 1st & 2nd fix carpentry Oak and timber framed structures Kitchens Structural steel works Renovations Extensions Garage conversion We look forward to hearing from you
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Comer Construction
No reviews yet
Extension Builder in Newhaven
Small to large extensions and refurbishments. New kitchens and bathrooms.
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Buildtech Construction
Rating: 5 out of 5
Extension Builder in Newhaven
Been trading for 18 months, 16 years experience. Building extensions, conservatories, orangeries, brick walls, re-pointing patios, paths, sheds, fencing, landscaping.
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Latest review:
Groundwork & Foundations- 6 Jun 2021
Great team - friendly, fast and efficient - delivered to high quality.
Jove Group Ltd
No reviews yet
Extension Builder in Newhaven
NEW TO MY BUILDER! Re-Gen are a Sussex based construction firm part of Jove Group. Established 25 years ago, we offer a full design and build service and have an expert team of skilled professionals. We work closely with our customers to ensure they feel informed and involved at every stage of a build project, from conception to completion. Restore. Renovate. Regenerate! We undertake a wide range of work from converting large listed buildings into multiple flats to individual bespoke projects. We specialise in period and listed property renovation and have 30s Deco, Victorian town houses and Elizabethan cottages in our portfolio. We take great care to restore original features and preserve the character of a property, protecting many existing fixtures and fittings such as mouldings, doors and fire surrounds. We use ethically sourced, carbon neutral materials from local Sussex suppliers. We double offset the carbon footprint of all projects with certified tree planting in collaboration with E-forests.
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D.Baker Building and Maintenance Services LTD
No reviews yet
Extension Builder in Newhaven
I left school in 2006 to begin my career in construction, working with my Dad and Uncle who was the managing director of TPCT (The personal construction team). Here I learnt many of the skills I work with today, kitchen & bathroom installation, plastering, plumbing, painting & decorating, tiling and carpentry. Having earned my stripes over a 6-year period I decided it was time to set up my own business which eventually evolved to become the company I have today, D Baker building and maintenance services. I really do love what I do and I get so much satisfaction from delivering a high quality professional service to my customers, whilst giving real value for money. I have very high personal standards with my work and take real pride in what I do. This I believe is reflected in the outcomes I achieve, the positive feedback I receive and also from the recommendations that come directly from my customers. If you have any queries about what I do or want more information then please do give me a call to discuss
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EJ Multitrade Services
No reviews yet
Extension Builder in Newhaven
We are a small company that put the customer relationship first. Our work speak for it self and always leave the property clean! Leaving the customer always happy.
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Advanced Groundworks
Rating: 5 out of 5
Extension Builder in Newhaven
With over 30 years experience in ground work and 10 years in business we are able for all types of jobs. The jobs we do include: ■Demolition ■New builds and footings ■Driveway installation ■Concrete slabs for sheds Insurance can be provided upon request. All work is guaranteed.
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Latest review:
Groundwork & Foundations- 22 May 2026
John did a fantastic job with the groundworks for our new 150sqm block driveway. He priced keenly, started quickly and was on-site consistently every day for the week. Really skilled with the digger, good at dealing with the neighbours and always fun to talk to. Some aspects of the job changed based on what the dig uncovered, but he was pragmatic and ultimately left me feeling that he just really wanted to do a good job as if it was his own. Highly recommended - 10/10.
Loft Extension Roofing Ltd
Rating: 5 out of 5
Extension Builder in Newhaven
Our complete design and build service will transform your home! Our team works with you to create bespoke designs that suit your needs and budget, ensuring every detail is taken care of. From traditional extensions to modern loft conversions, we deliver exceptional results that add value to your property. Contact us to schedule a consultation with our team .
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Latest review:
Extensions- 9 Feb 2026
Highly recommended professional building services.
J Unwin Property and Construction Ltd
No reviews yet
Extension Builder in Newhaven
*Please read the footer at the end of our bio* J Unwin Projects & Construction is a multi-disciplinary construction and project delivery company operating across residential, commercial, and mixed-use sectors throughout London, Sussex and Kent. We specialise in delivering high-quality projects from concept through to completion, combining hands-on construction expertise with structured project management and long-term asset support. Our work spans private residential developments, large-scale refurbishments, commercial fit-outs, and complex multi-unit schemes. Our capability extends far beyond traditional building. We provide a fully integrated service that supports clients at every stage of the lifecycle — from initial planning and design coordination, through construction delivery, to ongoing maintenance and facilities management. This ensures continuity, accountability, and consistently high standards across every project we undertake. We are trusted by private clients, developers, and commercial operators to deliver projects where detail, reliability, and execution matter. Whether it’s a bespoke residential build or a large commercial environment, our approach remains the same — professional, efficient, and uncompromising on quality. At our core, we pride ourselves on being solutions-driven. We understand that every project carries unique challenges, and our team is structured to respond with clarity, adaptability, and precision. J Unwin Projects & Construction continues to grow through reputation, long-term relationships, and the consistent delivery of projects that meet — and exceed — expectations. *For larger or direct requests please contact us through our website*
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SD Carpentry & Construction
Rating: 5 out of 5
Extension Builder in Newhaven
I'm a qualified City & Guilds Carpenter with 30 years experience. I'm also experienced in Auto Cad and open web joist design. I can supply you with drawings for planning applications to suit your needs. I have done many new builds over the years and also extensions and loft conversions. I also do smaller works such as kitchen fitting, fencing, door hanging, decorating, tiling and all aspects of building work to a very high standard. If you have any questions then please get in touch.
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Latest review:
Carpentry- 14 Mar 2017
Simon worked hard and well, did what we discussed and to the price fitting skirting board, architrave and a weather bar. He has a pleasant manner, and clears up. Would recommend him.
Highgrove construction
Rating: 4 out of 5
Extension Builder in Newhaven
Hi my names
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Latest review:
Bathroom Fitting- 25 Aug 2024
Quick, tidy, friendly, polite will definitely use again and recommend
Marben Construction
Rating: 5 out of 5
Extension Builder in Newhaven
At Marben Construction we undertake all aspects of building and construction. Delivering high quality workmanship, a friendly reliable service to our customers giving them peace of mind they are working with the right company delivering high standards of workmanship and value for money.
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Latest review:
Mark and his team did a full kitchen diner extension for us earlier this year. They followed our plans and even came up with some new ideas that have worked wonders. They turned up every day and worked like troopers. Very precise in their approach and they cleaned up everyday. If you want a reliable hard working team that do the work to an excellent standard, you need Marben Construction. I will be calling them again on my next building project. 10/10
Usher Carpentry
Rating: 5 out of 5
Extension Builder in Newhaven
I cover all aspects of carpentry and building with over 20 years of experience as a sub contractor. Now bringing my services direct to the public.
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Latest review:
Carpentry- 19 Aug 2019
Excellent job, very proffesional. Work carried out exactly as it was planned. Punctual, polite , knowledgable and a tidy worker. I couldn’t ask for more. Even came at a very competitive price! 10/10 !!!

Top rated Extension Builders

Our Extension Builders in Newhaven, are rated 5 out of 5 based on 6 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.