Extension Builders in Waltham Cross

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.3 (18 reviews)

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Some of our top rated extension builders in Waltham Cross

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Propertkare
Rating: 5 out of 5
Extension Builder in Waltham Cross
Propertkare is service run building and refurbishment group. We undertake all forms of building work and maintenances, kitchen and refurbishment, painting and tiling. We have been trading for past 10yrs with great success.
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Latest review:
Carpentry- 14 Oct 2025
Mr Williamson did a fantastic job installing and repairing fire doors in my HMO property to the exact standard required by the council. He was very professional, punctual, and highly attentive to detail throughout the entire project. The quality of his work was exceptional, and he ensured the job was completed within the agreed deadline. I’m very pleased with his service and would gladly recommend him to anyone looking for a reliable and skilled carpenter.
Arder Engineering and Surveying Ltd
Rating: 5 out of 5
Extension Builder in Waltham Cross
We are a structural engineering and surveying practice founded by engineers with over 10 years of industry experience. We provide reliable, practical, and cost-effective structural engineering solutions for residential and commercial projects across the UK. Our structural engineering services include: Structural design for new-build projects in steel, concrete, timber, and masonry. Structural design for extensions, loft conversions, refurbishments, alterations, and basement projects. Structural calculations for Building Regulations approval. Structural inspections and assessments. Feasibility studies and pre-planning structural advice. Our RICS-registered surveyors also provide: Level 2 Home Surveys Level 3 Building Surveys We are committed to delivering clear communication, fast turnaround times, and high-quality engineering solutions. We'd be pleased to discuss your project and provide a competitive quotation.
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Latest review:
I recommended Arder Engineering to my client and had an excellent experience working with them. Their pricing was competitive, and the drawings were consistently delivered with a very quick turnaround, helping to keep the project on schedule. My architectural feedback was carefully incorporated throughout the project. The final drawings were clear, professional, and easy to work with.
A J Keating
Rating: 5 out of 5
Extension Builder in Waltham Cross
Hello we are a family firm based in north London. With more than15 years experience doing mostly exterior work. We enjoy difficult jobs and like a problem to be solved. Retaining walls, drainage, foundations are our bread an butter.We pride ourselves on a great job at a fair price.
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Latest review:
Groundwork & Foundations- 30 Aug 2022
Axel & his team have done a huge amount of work for us through 2022. They started by building the foundations, and then also built the block walls and the structure for the roof. They also constructed an entire extra timber framed shed. After more than four months of working for me constantly I can say that I'm very happy with the quality and speed of Axel's work. He has worked through all the work we have given him, and all the extra issues that came up, with a pragmatic and competent approach. The site today is unrecognisable from when he arrived (he also removed several tonnes of soil for us etc), and I would hire him again without reservation.
UPGRADE PROPERTY SERVICES LTD
No reviews yet
Extension Builder in Waltham Cross
Upgrade Property Services Ltd is a private limited company incorporated in England and Wales on 1 September 2015 (Company No. 09756192), with its registered office at 121 Swanfield Road, Waltham Cross, Hertfordshire, EN8 7JE, UK. The company is currently active and primarily operates in construction of domestic buildings and property improvement services.� Companies House It provides a wide range of property and building services for residential and commercial clients, including general building work, extensions, loft and garage conversions, refurbishments, kitchen and bathroom installations, and other construction-related projects. The business also offers property maintenance and related services such as electrical work, plumbing, plastering, roofing, landscaping and waste/rubbish removal. Its team focuses on delivering quality craftsmanship, tailored solutions and customer satisfaction across Hertfordshire, Essex and North London. The company has built a reputation locally for professional service and reliable project delivery, often emphasising free quotations and personalised project planning.
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U & A Builder
Rating: 4.9 out of 5
Extension Builder in Waltham Cross
We've been ground-workers for over 16 years now and we've got lots of experience. We specialise in many aspects such as groundwork, driveways, landscape gardening, underpinning, paving, foundations, extensions, fencing and general building work. Our jobs have a warranty and also guarantee to complete all jobs to a high standard.
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Latest review:
Landscaping- 19 Mar 2024
Completely professional from start to finish. Urim and Aryam are both excellent communicators, which made a huge difference in planning the drainage for our patio, and rebuilding our front steps. We had every confidence in them from the outset and they fulfilled all our expectations. A great team!
BUILD ON TIME LTD
Rating: 4.9 out of 5
Extension Builder in Waltham Cross
BuildOnTime LTD is a family business and one of the fastest growing building companies in London.We have over 20 years of experience in all types of building and construction works.Our team is structured from highly qualified, friendly and ambitious workers.We are your builders in North London.
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Latest review:
Extensions- 30 Aug 2024
We recently used Build on Time Ltd to build a ground floor extension and remove chimney breasts from 4 rooms on a home renovation project. Paul and his team delivered within budget and ahead of time. This did not compromise their attention to detail or care taken with their work. All were extremely hard working and committed to getting as much out of each day as possible. They were reliable, trustworthy and a pleasure to be around. We would definitely recommend!
Rkay Property Services Limited
Rating: 5 out of 5
Extension Builder in Waltham Cross
Hello to all potential new customers. Rkay Property Services Ltd are a team of highly motivated and skilled tradesmen who enjoy nothing more than completing a project for a customer in the residential or commercial area. Be it larger works such as building houses, extensions, loft conversions, kitchen design and installation, bathroom installation, full refurbs and renovations or smaller works such as painting and decorating, flooring, plumbing and electrics we have the right team for the job!
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Latest review:
Extensions- 9 Oct 2020
Ryan and his team built a kitchen extension and installed an en suite bathroom for us. Their quote was competitive compared to others and they completed the work in the original 12 week time frame promised. They were friendly and approachable throughout and happily adapted to our changing plans as the project progressed, making suggestions to help us solve problems that came up. The work has been finished for a few weeks now and we're really pleased with the quality of the finish and have had no teething issues to address. We'd happily use them again for any future projects.
Sinevir Construction
Rating: 5 out of 5
Extension Builder in Waltham Cross
Sinevir Construction Ltd is a trusted construction company based near London, proudly serving the capital and surrounding areas. We specialise in residential and commercial projects, including new builds, extensions, refurbishments, and structural works. Our team of qualified professionals is committed to: High standards of workmanship Full regulatory compliance Clear and honest communication throughout every stage of the project Whether it's a small private renovation or a complex public contract, we approach each project with care, precision, and professionalism. What sets us apart: ✅ Construction Online Gold Member ✅ Skilled and experienced workforce ✅ NEBOSH-certified site safety supervision ✅ CHAS and SSIP-accredited for health & safety standards ✅ Fully insured, giving clients peace of mind ✅ Transparent pricing and realistic scheduling ✅ Respect for architectural heritage and local communities ✅ Competitive rates without compromising on quality We believe every property deserves thoughtful construction and reliable service — and at Sinevir Construction Ltd, we proudly deliver both.
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Latest review:
Extensions- 27 Mar 2026
Ruslan was excellent at his craft. Very hard working, very clean and professional with a great attitude. Would highly recommend this company
W&T Building Maintenance LTD
Rating: 5 out of 5
Extension Builder in Waltham Cross
WT Construction Service LTD. has been in business since 2002 and we`re specialists in design, planning, structural, building service, house extensions, loft conversions, joinery and renovation work covering whole of London.We guaranteed high quality finish on competitive price. We`re signed FMB,TRUSTMARK
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Latest review:
William and his company fitted a new kitchen for me and did the painting and wallpapering as well. They did a professional high quality job within a short time. I was absolutely satisfied with their service and their prices. They work fast, clear and precisely. I would highly recommend them to anyone.
Devi
Rating: 5 out of 5
Extension Builder in Waltham Cross
Shehu builders With many years of experience in construction industry, I work to very high standards and my customers are always extremely satisfied with my work.
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Latest review:
Restoration & Refurbishment- 3 Oct 2025
Devi is a very nice, polite and more importantly calm man. He has just finished renovating our entire flat to a very good standards. Thank you Devi!
N Flack building services Ltd
No reviews yet
Extension Builder in Waltham Cross
I’m very good builder with 30years experience. I work all over north London and Hertfordshire. I’m a multi trader also with a team of experienced tradesmen to cover all areas. You can find my business on facebook and instagram.
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KKH Construction LTD
No reviews yet
Extension Builder in Waltham Cross
KKH Construction LTD is a well established building company that has build an enviable reputation over the last 15 years. We pride ourselves on our commitment to provide a professional and speedy service at all times.We take on all types of jobs from small domestic work to larger projects , all carried out to the highest standards, and at very competitive prices.
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City Seven Group Ltd
Rating: 4 out of 5
Extension Builder in Waltham Cross
Welcome to City Seven Group – Your Trusted Partner in Construction and Home Renovations. At City Seven Group, we believe that your home is more than just a structure; it’s a reflection of your lifestyle and personality. With over 14 years experience, our dedicated team is committed to transforming your vision into reality. Whether you're dreaming of a modern kitchen, a cosy living room, an additional living space or anything down to experienced wallpaper installation, we have the expertise to bring your ideas to life. Why Choose Us? Our skilled professionals bring a wealth of knowledge and hands-on experience to every project to ensure that your renovation meets the highest standards. We understand that every client has unique needs and preferences. From the initial consultation to project completion, we work closely with you to tailor our services to fit your specific requirements and budget. We take pride in attention to detail and commitment to quality. Our goal is to deliver results that not only meet your expectations but exceed them, ensuring lasting craftsmanship in your home. Whether it's a small renovation or a large-scale project, we offer a range of services including design, remodelling, project management and more. Contact us today to discuss your next project.
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Latest review:
Painting & Decorating- 22 Apr 2025
Workmanship is excellent, city seven group are professional, polite, kept me updated, gave excellent advice and I would definitely recommend them. The job took a fair bit longer as there were things that came up along the way but overall I am really pleased with the work. I will also be hiring them again for another job 😊 They have turned my living room into a lovely relaxing place to be which is so important for my kids and me, I can’t thank Jonah and his team enough!
RMR Building & Renovation
Rating: 5 out of 5
Extension Builder in Waltham Cross
We are now on My Builder! Please checkout our reviews on Rated People & Trust a Trader by searching our company name. Our building services company RMR Building & Renovation Ltd has over 15 years’ experience in the industry. We have been helping customers in London/Essex and the surrounding 10-mile radius by providing professional, trustworthy building services. RMR Building & Renovation Ltd has a wealth of experience and is known as one of the best builders in Essex.
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Latest review:
Restoration & Refurbishment- 24 Aug 2025
Rez and the Team have done an excellent job with the complete bathroom renovation and additional decorating works, laminate flooring in the hall and living room, along with plumbing and electric tasks. Very professional, with great communication and finished all works to a high standard within the estimated time, accommodating all changes as the works went. Very grateful also for tackling the bathroom wall tiles pattern, which turned out to be exactly as planned.
Unico Develop ltd
No reviews yet
Extension Builder in Waltham Cross
At Unico Develop LTD, we offer quality services from small projects up to new builds for all clients at reasonable prices. Our courteous Construction Company staff have the professional tools and experience necessary to help with all your needs. With over 25 Years experience!
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HNL Construction Limited
Rating: 5 out of 5
Extension Builder in Waltham Cross
Home improvement company. Experience since 2005.Our job is our passion.Let us make Your dream project.Every job its important to us from small to big. We do: -kitchen -bathroom -loft conversion -extension -refurbischments -electric -plumbing -gardening …and many more
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Latest review:
Conversions - General- 23 Mar 2026
Pawel and his team are great - got them in for a few things now, from damp repair, knocking through an internal brick wall, moving a fuse box, installing a wood floor. Always good workmanship, easy comms and decent value! Have recommended to a few friends who are equally pleased.

4.3

Top rated Extension Builders

Our Extension Builders in Waltham Cross, are rated 4.3 out of 5 based on 18 reviews from customers like you.

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

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 Waltham Cross 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 Waltham Cross who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Waltham Cross?

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

Find extension builders in Waltham Cross with MyBuilder

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

Step 2: Compare different extension builders in Waltham Cross

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

Step 3: Hire Waltham Cross extension builders with confidence

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

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

What to ask a Waltham Cross extension builder before hiring?

Before hiring an extension builder in Waltham Cross or extension building company in Waltham Cross, 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 Waltham Cross?

An extension builder in Waltham Cross 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 Waltham Cross 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 Waltham Cross?

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 Waltham Cross 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 Waltham Cross 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 Waltham Cross

Can an extension builder in Waltham Cross help with planning permission?

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

Many Waltham Cross 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 Waltham Cross help with materials and finishes?

Yes, most extension builders in Waltham Cross 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.