Extension Builders in Horsham

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.7 (10 reviews)

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Some of our top rated extension builders in Horsham

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Southwater Building Company
Rating: 5 out of 5
Extension Builder in Horsham
We are a building company specialising in extensions, brickwork, carpentry, landscaping, and driveways. We are a small company and most of the work is undertaken by us and the small group of other trades that we have worked with for a long time (electricians and plumbers). We offer a personal service and always stay on site until the job is completed.
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Latest review:
Tim carried out repairs to our flat roof and extension roof. The work was done to a high standard and Tim and team were polite, tidy and reliable. I wouldn’t hesitate to recommend Southwater Building Company.
Signature Lofts
Rating: 5 out of 5
Extension Builder in Horsham
Signature lofts is a small family Loft conversion company with 25 years experience . We specialise in Loft conversions and extensions in Sussex Kent & Surrey. Have a browse through our Website & Facebook.
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Latest review:
Loft Conversion- 1 Apr 2026
We recently had a loft conversion and extension done by signature lofts All the work they done looks great. They were very friendly, And at times worked very late into the evening and also some weekends I would definitely recommend Dave and his team for loft conversions and extensions. Best, Scott
Canterwood Partnership Limited
Rating: 5 out of 5
Extension Builder in Horsham
Canterwood Partnership are a professional, experienced building firm, specialising in renovations, residential and commercial projects within Sussex, Surrey and Kent. We have a team of highly skilled in-house craftsmen to create perfect solutions for our clients. We pride ourselves on superior quality buildings, delivering on time and on budget. We communicate with you every step of the way ensuring a solid partnership.
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Latest review:
Groundwork & Foundations- 29 May 2021
This was a small job but it was completed quickly. No mess left behind very tidy work. I would recommend.
tops developments
Rating: 4.9 out of 5
Extension Builder in Horsham
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
Gaffney Builds
Rating: 5 out of 5
Extension Builder in Horsham
I am a sole trader with a carpentry background who takes pride in their work and ultimately, the finished product.
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Latest review:
Carpentry- 8 Oct 2017
Jack done an excellent job on hanging my door. Good customer and takes great pride in his work. Jack was very helpful and gave me good advice due to his wide range of experience and knowledge on new builds. He helped me pick out the correct hinges, latches and doors. I am very grateful to have Jack work for me and would recommend him to others
Callum cranfield
Rating: 4.9 out of 5
Extension Builder in Horsham
I am a carpenter tradesman, I have 8+ years in the trade. I have a team of well trained carpenters and we take on a great variety of projects. This work includes: Refurbs, extensions, loft conversions, external wood work, 1st and 2nd fix. have excellent time
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Latest review:
Carpentry- 12 May 2026
Went really well. Would hire him again, definitely.
Eva build & landscaping ltd
Rating: 5 out of 5
Extension Builder in Horsham
We specialise in the building & landscaping , we take on all sized jobs . We’re fully insured. We have all our own plant to keep the cost down for the client.
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Latest review:
Extensions- 3 Sep 2025
Great job. Very happy with the finished product. These guys are solutions driven. No issues were too big to solve
SKA Building and Construction LTD
Rating: 5 out of 5
Extension Builder in Horsham
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.
The builder
Rating: 4.8 out of 5
Extension Builder in Horsham
I am a skilled workman with over 30 years of expertise. Here is an extensive list of many but not all the things I can do... Building, maintenance, gardening, pluming decorating, tiling, roof cleaning, presure washing, painting,pluming, kitchen or bathroom fitting etc
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Latest review:
Painting & Decorating- 10 Jul 2024
I recently had the pleasure of hiring Daniel to paint the ground floor of my house, including the kitchen, hallway, and living room. Not only did he do an exceptional job with the painting, but he also took the time to fix issues left over from a previous plasterer, all within the price we agreed on. Daniel truly went above and beyond my expectations. His attention to detail and dedication to delivering high-quality work was evident in the finished product. The walls look fantastic, and I couldn't be happier with the result. If you're looking for a reliable and skilled painter, I highly recommend Daniel.
Mapleleaf Brickwork
Rating: 3.7 out of 5
Extension Builder in Horsham
Local family run business, we have been in the industry for 25 years and have built a very good reputation. We provide a friendly and professional service and our work ranges from garden walls to new builds. We have a wide range of knowledge and offer advice on many aspects of building. Our portfolio covers a majority of building projects.
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Latest review:
Groundwork & Foundations- 13 Mar 2024
James was efficient, punctual and polite during the quotation process and provided a very competitive price. He gave me a high degree of confidence. On the day of the work, he team arrived as agreed, worked hard throughout the day and did a very neat and professional job. They also left the site clean and tidy. James checked in on them regularly throughout the day as well. I would thoroughly recommend this company. Thanks for a great job done.
Mack Thomson Carpentry
Rating: 5 out of 5
Extension Builder in Horsham
I’m a qualified carpenter based in south east England with a huge passion offering expert carpentry and joinery services for both homes and businesses. I specialise in kitchens, second fix carpentry, garden houses and roofs. However, I can also provide all other forms of carpentry including: First fix carpentry: Framing floors, Walls, Roofs, door linings etc. Second fix carpentry: Wardrobes, Cabinetry, Shelving, Skirting, Architraves, Doors, Flooring and Bespoke joinery. Whether it’s a just a small fix or a full renovation, I’ll deliver a reliable service and a professional finish.
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Latest review:
Joinery & Cabinet Making- 24 Mar 2026
Mack did a fantastic job with chest of drawers, bedside drawers and bookshelf. Very professional and goes out of his way to get the job done perfectly, and also cleaned up at the end too. I would definitely recommend him.
MPC Plastering
Rating: 5 out of 5
Extension Builder in Horsham
We have been going for some 20 years and have worked on prestigious builds for high profile customers.
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Latest review:
Extensions- 23 Nov 2019
A truly exceptional builder that far exceed expectations. Mark has an eye for detail that ensures the finished build does not disappoint! I would highly recommend Mark for any building project. You can be confident that Mark will convert your vision in to reality!
JGP Plastering & Brickwork Ltd
Rating: 5 out of 5
Extension Builder in Horsham
JGP Plastering & Brickwork is a Surrey based company, specialising in brickwork & plastering, extensions & refurbishments. I have worked in the construction industry for 16 years, we pride ourselves on being professional, friendly, clean and reliable. Our extensive knowledge and expertise in the trade means you can be confident you will recieve quality workmanship, competitive pricing and communication throughout.
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Latest review:
Plastering- 24 Nov 2022
Excellent Job by Josh. Transparent, Timely and a great plasterer. Would recommend.
RJC Carpentry
No reviews yet
Extension Builder in Horsham
We are a carpentry company from horsham. We are trustworthy and reliable. Please feel free to contact us for a quote or for guidance on a project, whatever the size.
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N Young Builders Ltd
Rating: 5 out of 5
Extension Builder in Horsham
I have over 30 years experience in the building trade and the ability to take on all types of building work to a high standard. Myself and my experienced team of tradesmen can see your project through from groundworks to decoration, all at competitive rates and a high standard of completion. I give a competitive no obligation quote, am fully insured as are all our tradesmen, and we always aim to finish to programme on budget and safely.
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Latest review:
Extensions- 31 Jul 2016
Nick built a two storey extension which added two bedrooms, bathroom, utility room, downstairs toilet and much extended kitchen. All work was completed to a high standard and all workers were very polite; no problems whatsoever. The extension was delivered mostly to budget with extras clearly explained. I would highly recommend Nick for a trouble free build.
Petrichor construction
No reviews yet
Extension Builder in Horsham
Petrichor construction is a company who take pride in their work. We have close working relationships with designers, architects, engineers and a wide range of subcontractors and tradesmen. Our primary goal is 100% client satisfaction. We provide right-first-time solutions and as a result, benefit from recommendation and repeat business. We provide a fully insured and comprehensive construction service for every client. We are known for constantly delivering a high level of service which is a critical element of our success. Our core principle is to deliver flawless project management and a remarkable result every time. Our skillful team pride themselves on being highly professional, respectful and efficient. These values come from a minimum of 15 years’ experience from each tradesman, all of whom know the high standard required of them. We offer expertise and experience in the following specific areas: Refurbishment specialist Bespoke new build homes Single and Double Storey extensions Garages Porches Open plan designs Wall removal & Structural alterations Kitchens & Bathrooms Boundary walls Garden offices Landscapes
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3.7

Top rated Extension Builders

Our Extension Builders in Horsham, are rated 3.7 out of 5 based on 10 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Horsham?

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

Find extension builders in Horsham with MyBuilder

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

Step 2: Compare different extension builders in Horsham

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

Step 3: Hire Horsham extension builders with confidence

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

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

What to ask a Horsham extension builder before hiring?

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

An extension builder in Horsham 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 Horsham 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 Horsham?

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 Horsham 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 Horsham 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 Horsham

Can an extension builder in Horsham help with planning permission?

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

Many Horsham 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 Horsham help with materials and finishes?

Yes, most extension builders in Horsham 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.