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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County Town Building Services
Rating: 5 out of 5
Extension Builder in Horsham
Extensions, alterations, refurbihments Brick work, Flint work, Structural alterations, Garden walls, porcelain, stone, brick paving
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Latest review:
Landscaping- 30 Sep 2023
Absolutely amazing work, really cared about the work that was being done. Went from just a garden wall being rendered to also constructing a patio area and steps due to a great price. We absolutely love the new area. Will be using them again for the front garden!! Thanks again Nick!
Ferguson building services Ltd
No reviews yet
Extension Builder in Horsham
We are a family run construction building company, We have in house trades to cover all aspects of a project. It’s very important to us at FBS to ensure the highest standards and care for our customers.
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J Unwin Property and Construction Ltd
No reviews yet
Extension Builder in Horsham
*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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Brighton Builds
No reviews yet
Extension Builder in Horsham
At Brighton Builds, we don’t just build; we create exceptional spaces that enhance your lifestyle. Specializing in loft conversions, carpentry, extensions, renovations, landscaping, and more, we bring your vision to life with unmatched craftsmanship and attention to detail. Whether you’re looking to expand your living space, revitalize your home, or create stunning outdoor environments, we’re here to deliver results that exceed expectations. What sets us apart? It’s our commitment to quality, reliable timelines, and transparent pricing. Our expert team works closely with you at every step, ensuring that your project is completed to perfection—on time, within budget, and exactly as you imagined. We take pride in treating every project as if it were our own, with a dedication to excellence that ensures the highest standards of design and construction. When you choose Brighton Builds, you’re choosing a company that listens, understands, and delivers. Our customer-first approach and meticulous attention to detail make us the preferred choice for homeowners who demand nothing less than the best.
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PETER HANDYMAN
No reviews yet
Extension Builder in Horsham
Hi, I run a small business making home improvements. I work alongside some established estate agents doing small jobs from a faulty lock door to full home refits. I am a sole trader and have a small team of experienced guys for any big jobs that need undertaking. I have many years of experience in the following. Dry lining.Joinery/carpentry .painting and decorating .pvc windows and doors.Roof and gutter repairs/ new installations.Plumbing/bathroom refits. Patios/Decking.Small Extension No Job too Big or Small. For a free, no-obligation quote, feel free to contact Many Thanks PETER
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Chambers Property Maintenance
Rating: 4.8 out of 5
Extension Builder in Horsham
We offer a comprehensive range of Property Maintenance and Construction services to include Extensions, Loft Conversions, Interior and Exterior Painting and Decorating,Plastering and Render Systems,Sash Window Refurbishment, Stud Walls, Kitchen Fitting, Flat Roofs, Chimney Removal and so much more a family run business with exceptional attention to detail we can help restore and maintain your property all year round. We appreciate your business so contact us today for a friendly quotation.
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Latest review:
Restoration & Refurbishment- 15 Jul 2024
Good work in the end and good people. Thanks Steve and Frank.
Langley Groundwork Ltd
Rating: 5 out of 5
Extension Builder in Horsham
Welcome to Langley Groundworks Ltd I’m Rich Langley, founder of Langley Groundworks Ltd, and we’re proud to offer a reliable, experienced service in all aspects of groundworks, foundations, drainage, demolition, and site clearance. With years of hands-on expertise and a strong reputation for quality, we ensure every project—big or small—is completed safely, efficiently, and to the highest standards. In addition to our core groundworks services, we also manage full property refurbishments and alterations, offering a complete start-to-finish solution tailored to your needs. Whether you’re preparing a new build site, upgrading existing infrastructure, or transforming a property, Langley Groundworks Ltd brings the right skills, equipment, and attitude to get the job done properly. We’re here to make the process as straightforward and stress-free as possible—reliable, professional, and ready to deliver.
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Latest review:
Groundwork & Foundations- 3 Aug 2025
Richard was incredible- excellent at his craft, very precise and very hard working. He knows his concrete! We couldn’t recommend him enough!
Creative Space
No reviews yet
Extension Builder in Horsham
Highly skilled tradesmen ready to Complete your building needs.
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Brockwitz Interiors
Rating: 5 out of 5
Extension Builder in Horsham
I am a passionate cabinet maker and joinery specialist with over 15 years experience. I have trained and worked for one of londons most reputable bespoke furniture and cabinetry companies and am able to provide the full Profesional package from design to installation. Above all i believe in honesty and in doing the job the right way, the first time. work garaunteed and references avaliable upon request.
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Latest review:
Carpentry- 21 Nov 2016
George designed, built, installed a set of custom-made doors for under my stairwell. Lovely guy, very courteous and pleasant to have around, and the work was precise and pleasing. I had one or two tweaks I needed done to the doors after the job had been completed which he helpfully came back and did for me. Happy to recommend him.
Highgrove construction
Rating: 4 out of 5
Extension Builder in Horsham
Hi my names
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Latest review:
Bathroom Fitting- 25 Aug 2024
Quick, tidy, friendly, polite will definitely use again and recommend
Luxe signature build Ltd
No reviews yet
Extension Builder in Horsham
Luxe Signature Homes is a bespoke building company specialising in high-quality timber frame extensions, new builds, and garden rooms across Sussex and the surrounding areas. We combine modern building methods with traditional craftsmanship to deliver premium results on time and on budget. From the initial concept to the final finish, we take pride in offering a seamless, stress-free experience with meticulous attention to detail and a strong focus on customer satisfaction. Whether it’s extending your home, creating a standout garden space, or building from the ground up — we deliver every project with care, clarity, and precision. Let us help bring your vision to life.
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JC Kitchens and Bathrooms Ltd
No reviews yet
Extension Builder in Horsham
We are a small company with over 25 years of experience in the trades. Specialising in kitchens and bathrooms but with capacity to take on all kinds of jobs of different sizes from tiling and plumbing to full scale extensions we can do it all
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Cosmin Construction & Consulting LTD
No reviews yet
Extension Builder in Horsham
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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Oracle glazing & repairs ltd
Rating: 4.8 out of 5
Extension Builder in Horsham
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.
Southern extensions
Rating: 4.1 out of 5
Extension Builder in Horsham
We have over 30 years experience in all aspects of building. Starting in London and now covering the south coast. This includes the maintaining of residential properties as well as loft conversions/ extension's /basement's / kitchens / bathrooms/ decorating (internal and external) /brickwork / plastering / plumbing. All trades workers are fully qualified. Properties are left clean and tidy at the end of each day. Work is guarenteed and fully insured. we only fully compleat one project at a time are based in Hove / eastgrinstead / Eastbourne We cover from Eastbourne to Worthing and up to Crawley
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Latest review:
Extensions- 13 Nov 2019
Mark managed the whole job (which was complex and involved three different rooms; change of use and new build) effectively and efficiently and engaged family members and friends in various trades as needed. With extensive experience Mark was able to make suggestions and put forward many ideas to improve the basic plans that we had which was most helpful. This included raising a ceiling level to a better height than we had envisaged possible and removing the need for a pier so that a wall could be flat throughout the new kitchen. Mark has a good eye for the aesthetics of a job. He is also very amenable to adding on extra smaller jobs in the process and even procuring some materials that I wanted in order to do something myself ! The workmanship and finish is high quality for a competitive price. I would not hesitate to recommend Mark and have, in fact, already done so for another couple of potential jobs. Finally, Mark is a really nice guy and great to have a chat and cup of tea with (two sugars!)
K.T Building Services
Rating: 5 out of 5
Extension Builder in Horsham
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.

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.