Extension Builders in West Sussex

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (5 reviews)

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Some of our top rated extension builders in West Sussex

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D&K Building Services
Sponsored
Rating: 5 out of 5
Extension Builder in West Sussex
D&K Building services have over 35 years experience working within the building industry and cover all aspects of construction. Our trademens are all fully qualfied and reliable and all come with a great sense of humour. Our motto is quality rather than quantity.
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Latest review:
Extensions- 25 Aug 2025
D&K did a great job on our extension and were clear on the budget through the process. We were so pleased with the work and the team we have we also got them to do our utility room and hallway. Very happy with the advice they gave and the different tradesmen we met on the project.
Ecohaus limited
Rating: 5 out of 5
Extension Builder in West Sussex
Are you interested in reducing your energy bills at home? Do you want to improve your indoor air quality? Does your property suffer from damp issues? Our Passivehouse experience has led to a deep understanding of how buildings work, we can help with reducing energy bills, improving indoor air quality, damp issues and more in buildings. We can help you with new buildings, refurbishments, retrofits and historic buildings.
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Latest review:
Damp Proofing- 14 Sep 2023
Ben is very knowledgable and helpful. I hope he provides a solution for the damp problem in one bedroom. We now ask him to identify issues in the whole house.
JT BUILDS AND SPECIALISED CARPENTRY
Rating: 5 out of 5
Extension Builder in West Sussex
JT Builds & Specialised Carpentry – Extensions • Conversions • Home Remodeling • External Window & Door Installations With 17 + years in the building industry, our family‑run, fully insured team manages every project from start to finish. We coordinate all trades in‑house, providing a single point of contact and seamless delivery. Core services – Extensions, loft/garage conversions, full‑home remodels, and specialist external window & door installations (timber, uPVC, aluminum, bifold, French doors). Recent highlight: Replaced an ageing wooden sliding door with a modern set of wooden French doors and upgraded several timber windows, earning a 5‑star Google rating. Why choose us? End‑to‑end project management, transparent quotes, and a track record of 5‑star reviews. While we don’t provide in‑house design services, we can recommend trusted, vetted designers. Contact us today for a free quotation
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Latest review:
Extensions- 2 Feb 2021
So far so good. Jeremy has been really helpful in understaning our needs and budget and the works have started.
Contact Building
Rating: 4.8 out of 5
Extension Builder in West Sussex
Contact Builder is founded by 3 brothers. Louis has been a carpenter since 2006. Mitchell a bricklayer since 2011. Courtney having learnt from our dad who was a scaffolder for 40 years has been a scaffolder in his own right since 2013. We have now decided to come together in 2024 with our combined experience of the construction industry to offer a complete package. We are collectively hard working, polite, conscientious and have a real eye for detail.
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Latest review:
Carpentry- 26 Feb 2025
Louis done a great job and will use again if required 👍
James King Landscapes
Rating: 5 out of 5
Extension Builder in West Sussex
My name is James i am the owner of James King Landscapes & brickwork. We offer a full range of bricklaying and construction services from garden walls, repair work ,extensions and full house builds. Aswell as hard and soft landscaping services including Patios, Driveways, Fencing, Screening, Hedge cutting, Turfing, Artificial grass and more. We can offer anything from small jobs to full garden make overs. Plese feel free to get in contact to discuss ideas and for a no obligation quote.
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Latest review:
I wanted to replace an old brick wall in my front garden with railway sleepers. I had some idea on how I wanted it to look, but I was very undecided: vertical, horizontal, staggered or squared?. When James came around he made clear suggestions on how make it look nice, simple and within budget. He explained to me what the work involved and showed me some pictures of a previous job he had done so I had a clearer idea. I had to go out the day he came to do the job but he made sure we both were on the same page and he would meet my expectations, and I wasn't disappointed when I came back home. I contacted him afterwards to check details about the look and maintenance of the sleepers and he always replied promptly. I would definitively recommend James.
Hammond builders
Rating: 5 out of 5
Extension Builder in West Sussex
We are a crawley based company with many years experience and pride ourselves on quality workmanship at competitive prices please phone for a free no obligation quote. More on checker trade
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Latest review:
Bricklaying- 15 Feb 2022
Does a great job... But you need to be very clear with your instructions.
C-21 Construction
Rating: 5 out of 5
Extension Builder in West Sussex
General Builder, 40 years in construction business, extensions and conversion work.
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Latest review:
Extension (10m by 7m) with kitchen/living area, utility and wet room with 5’ by 5’ shower. Delighted with the quality and built to agreed budget. Jez was always involved in discussing the work and requirement. Am engaging same company for next phase (porch and bespoke hallway). Highly recommended.
SKA Building and Construction LTD
Rating: 5 out of 5
Extension Builder in West Sussex
Hi I’m a fully qualified electrician, with a passion for building and construction, I built my first house at 23 years old and haven’t stopped building since. I am a multi trader who is very hands on. I have excellent communication skills and I am very respectful of peoples homes. I love building and constructing things, it is my passion. And I am passionate about perfection.
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Latest review:
SKA is lead by a thoughtful, thorough and competent builder who motivates his team well. He provided us with a ‘shell and core’ with finishes by others. He did the structurals, drainage, plumbing for two wet-room/wc ensuites and electricals including resiting pv cells on the new pitched roof and 4 underfloor heating zones.
Christian Godfrey Carpentry
Rating: 5 out of 5
Extension Builder in West Sussex
Christian Godfrey Carpentry (CGC), a premier construction firm with a decade of expertise serving Sussex and beyond. Specializing in comprehensive carpentry services and all aspects of building, our seasoned team combines skill, innovation, and attention to detail to bring your vision to life. Whether it's crafting bespoke woodwork, executing intricate renovations, or constructing from the ground up, our commitment to quality craftsmanship and client satisfaction remains unwavering. Trust CGC to transform your spaces with precision, reliability, and a decade of proven excellence.
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Latest review:
Windows & Doors (Wooden)- 25 Jul 2023
Christian was very quick to reply and gave me a competitive quote and said he could do the job over the following weekend. Vey polite, courteous and friendly. Turned up on time and completed the job well. Gave good advice to me on protection of the wood with a suitable oil/stain finish. I'd recommend and use him again.
M Sullivan Builders
Rating: 5 out of 5
Extension Builder in West Sussex
My name is Mark Sullivan. I have over 30 years experience in the building industry. I have a City & Guilds in carpentry and joinery. I also have experience in extensions, garage conversions, house renovations, plastering, fencing and plumbing guttering. I pride myself on providing an excellent professional service and value for money without compromising on quality. I have a portfolio of photographs of previous projects completed on request.
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Latest review:
Fencing- 29 May 2026
Very happy with the fencing work I had done. Mark and Tom were very friendly and efficient and they went over and above doing a few extra bits to help me out. Would definitely recommend and will use them again in the future for any other jobs I need doing.
DANCY BUILDING CONTRACTORS
Rating: 5 out of 5
Extension Builder in West Sussex
Dancy Building Contractors Limited is based in Steyning, West Sussex, we specialise in large-scale home extensions and conversions involving structural works. Whether you're a homeowner looking to transform your space or an architect seeking a trusted construction partner, our team brings the experience, precision, and reliability required to deliver exceptional results. A building contractor that cares, and priorities your requirements and expectations.
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Latest review:
Groundwork & Foundations- 4 Jan 2023
Work has not commenced yet due to first the ice and now the rain. But we have been communicating. But can follow through as soon as work complete. Thank you.
Power construction
Rating: 5 out of 5
Extension Builder in West Sussex
Hi, I’m Lloyd. I have over 25 years worth of experience in carpentry work, building, loft conversions, extensions, kitchen fitting, bathroom fitting and other building work. I take great pride in my work and in completing all work to a high standard, to ensure the customer is satisfied.
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Latest review:
An excellent job at the right price. Highly recommend.
Renov8 construction ltd
Rating: 5 out of 5
Extension Builder in West Sussex
Renov8 Construction Ltd specialise in repair, refurbishment, maintenance and extending of residential and commercial properties. Renov8 Construction prides itself on customer satisfaction and are setup to manage small, medium and large projects, from home alterations to large scale extensions and refurbishment projects. Our aim is to provide a service that is designed to work alongside our clients to ensure a stress free, pleasant and enjoyable building experience.
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Latest review:
Fencing- 2 Jun 2021
Great service, done quickly, kept informed. Good work.
AF Bespoke
Rating: 5 out of 5
Extension Builder in West Sussex
AF Bespoke is a business is made up by two friends who have teamed up and brought their skills in together. The type of work that we do is bespoke to improve your outdoor space. The work we normally undertake goes from deckings to outdoor garden structures, bespoke outdoor buildings, garden sheds, fencing and patios and any other outdoor maintenance.
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Latest review:
Fencing- 20 Mar 2022
Freddie and Austin are reliable, friendly and helpful and did a great job with the replacement and fitting of a fence panel. Wouldn't hesitate to recommend or hire AF Bespoke again.
Hedgehog Home Improvements
Rating: 5 out of 5
Extension Builder in West Sussex
We are a family run business based in Barns Green, west sussex. Our tradesmen have over 20 years experience in the building trade and are fully insured. We undertake all types of extensions,conversions and property maintenance, along with bespoke timber framed buildings, oak framed buildings and garden rooms.
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Latest review:
Roofing (Pitched)- 8 May 2019
arrived promptly and completed the job satisfactorily
Buildtech Construction
Rating: 5 out of 5
Extension Builder in West Sussex
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.
SD Carpentry & Construction
Rating: 5 out of 5
Extension Builder in West Sussex
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.
Get in touch
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.

4.2

Top rated Extension Builders

Our Extension Builders in West Sussex, are rated 4.2 out of 5 based on 5 reviews from customers like you.

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

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 West Sussex 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 West Sussex who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in West Sussex?

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

Find extension builders in West Sussex with MyBuilder

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

Step 2: Compare different extension builders in West Sussex

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

Step 3: Hire West Sussex extension builders with confidence

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

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

What to ask a West Sussex extension builder before hiring?

Before hiring an extension builder in West Sussex or extension building company in West Sussex, 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 West Sussex?

An extension builder in West Sussex 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 West Sussex 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 West Sussex?

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 West Sussex 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 West Sussex 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 West Sussex

Can an extension builder in West Sussex help with planning permission?

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

Many West Sussex 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 West Sussex help with materials and finishes?

Yes, most extension builders in West Sussex 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.