Extension builders in Hertfordshire

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.6 (18 reviews)

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Some of our top rated extension builders in Hertfordshire

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CHURCH CONSTRUCTION LIMITED
Rating: 4.9 out of 5
Extension Builder in Hertfordshire
We are a highly experienced team specialising in all aspects of building. We carry out full commercial and residential refurbishments incl. extensions, garden renovations, kitchens, bathrooms and everything in between. We have been in the industry for over 30 years and our team consists of various trades incl. qualified electricians and gas safe engineers. We are able to help from initial design through to completion. All of our work is carried out to the highest possible standard.
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Latest review:
Extensions- 15 May 2024
From the initial quote to the finished building Church Construction have been reliable and conscientious.The workmanship has been of a very high quality. Barry Church is an excellent project manager and always puts the customer first. His team is brilliant, each member highly skilled and attention to detail has been meticulous. The quote was accurate with no hidden extras. Barry was very patient and always willing to talk things through. We would definitely use Church construction again and be happy to recommend them.
D Tuley Carpentry And Building
No reviews yet
Extension Builder in Hertfordshire
Hello there! Look no further, because our team at D Tuley Carpentry And Building is here to make it happen! With 35 years of experience in the industry, we pride ourselves on being a trusted and reliable building company dedicated to bringing your dreams to life. What sets us apart is our commitment to creativity and innovation. Our team of skilled carpenters, craftsman, and builders work closely with you to understand your vision and create a space that reflects your style and personality.
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Liven Up London
No reviews yet
Extension Builder in Hertfordshire
Hi, we are a team of highly skilled, highly qualified tradespeople that provide a range of services from plumbing, roofing, electrical work, plastering, joinery and carpentry work. Members of the team have worked on projects large and small all around the UK, they have seen it all and accomplished a ton, so you can be sure that you are in more than capable hands.
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Iusi Stroy Limited
No reviews yet
Extension Builder in Hertfordshire
Iusi Stroy is a construction company based in the heart of United Kingdom, in London. We boast with an experience of more than two decades in the industry not only in UK but in Eastern Europe as well. You can definitely choose us for quality, adequate prices and fast timing!
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Leonidas Simakou
New on MyBuilder
Extension Builder in Hertfordshire
Leosim Construction Ltd provides professional construction, refurbishment and property improvement services across London and the surrounding areas, backed by more than 15 years of hands-on experience. Our services include painting and decorating, bricklaying, joinery and cabinet making, carpentry, house extensions, fencing, flooring installation of all types, loft conversions, flat and pitched roofing, and the fitting of windows and doors. Whether you need a small repair, a single-room improvement or a larger renovation or extension project, we aim to deliver reliable workmanship, a high-quality finish and a tidy, professional service from start to finish.
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SAM DESIGN & BUILD LTD
Rating: 4.4 out of 5
Extension Builder in Hertfordshire
Having a wide range of experiences in designing and constructing extensions, loft conversions, alterations and new buildings with planning, structural drawings and calculation, we provide full range of service from planning and design to construction. Electrical, gas safe, plumbing and heating are also part of our wide range of services. Load bearing wall removal, chimney breasts removal, refurbishing kitchen and bathroom were also one of the most accomplished projects in last year. Look forward to hear from you.
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Latest review:
Extensions- 3 Oct 2025
Job was to convert WC in outbuilding into a full bathroom, do walls and ceiling in outbuilding to convert into an office space. Price was agreed with things planned, still with some issues towards later part of job, It worked out in the end. Overall I am giving 3-4 stars as quality of work is good. Just need to have things written down with him, and a thorough discussion on plan before commencing work and agree on payment plan. suggested to keep 20% to be paid at completion.
Jpsingh
No reviews yet
Extension Builder in Hertfordshire
Good price good quality
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FS CONSTRUCTION DESIGN
No reviews yet
Extension Builder in Hertfordshire
We are a professional and reliable team with experience. Our team offer a wide variety of affordable property maintenance throughout London. We specialise in: * Loft conversions * Extension * Carpentry * Bathroom instalment * Door Lock * Electrician work * Furniture instalment/fitting * Gardening * House renovation * Flooring * Painting * Plastering * Plumbing * Roof work (leakage etc) * Tiling fittings * Wallpaper
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Equity Eco Services
No reviews yet
Extension Builder in Hertfordshire
In the world of construction and bespoke carpentry, experience isn’t just an asset—it’s the foundation upon which lasting quality is built. For over three decades, Richard Parker has exemplified this principle, bringing his passion, skill, and unwavering commitment to every project he undertakes. As a master carpenter and general builder, Richard’s career is a testament to the value of traditional craftsmanship, steady innovation, and the importance of family legacy.Comprehensive Services: Carpentry, Joinery, and General Building Richard Parker offers a comprehensive range of services that cover every aspect of domestic and light commercial construction: Bespoke Carpentry: From custom shelving and wardrobes to hand-crafted staircases, doors, and windows, Richard creates pieces that are both beautiful and built to last. Joinery: Precision joinery for both structural and decorative purposes, including timber framing, roof structures, and intricate moldings. Extensions and Renovations: Complete home extensions, loft conversions, and property refurbishments that enhance both space and value. Kitchen and Bathroom Installations: End-to-end service for modernizing and upgrading the most important rooms in your home.
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Mjb
No reviews yet
Extension Builder in Hertfordshire
I'm Mike been in the building trade for 16years. Met some extremely talented trades along the way who I've picked up alot from. Brickie by trade, love hard landscaping and building extension.
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BMR piling and foundations Ltd
Rating: 4.7 out of 5
Extension Builder in Hertfordshire
Hi my name is Baden and we specialise in piling and foundations from new builds to under pins no job is to big or to small. We are competitive prices to most other companies.
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Latest review:
Groundwork & Foundations- 3 Aug 2026
BMR has turned my dream self-build into a nightmare. An independent structural engineer has confirmed that the foundations BMR constructed are not in accordance with the approved structural drawings and require remedial structural works before my house can even be built. Defects in BMR's work: 200mm lost from both the front and rear elevations of the approved footprint. Internal load-bearing foundations constructed in the wrong location. Foundation levels between 30mm and 75mm out across the build. Thousands of pounds in remedial engineering, bricklaying and construction costs, plus weeks of delays. The setting-out engineer was appointed and paid by BMR as part of the contract I paid for, yet Baden tried to shift responsibility instead of taking ownership. I gave Baden every opportunity to inspect the site with my contractor and discuss a solution. Instead, he denied liability, refused to discuss the issues any further, and simply walked away from the problem.
Spearsons Building Services
No reviews yet
Extension Builder in Hertfordshire
We at Spearsons Group Ltd offer a quick reliable service at the highest standard. We cover all aspects of extensions. Kitchens ,Bathrooms ,Carpentry , Joinery , Plumbing and Heating , Plastering, Electrical. (Where Quality Matters !!)
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Hill Building Services
Rating: 5 out of 5
Extension Builder in Hertfordshire
We are a professional building services company that will carry out general building work including installing kitchens, bathrooms and loft conversions/extensions. We also provide decorating, tiling, landscaping, plumbing and drainage services. No job is too big or too small for us to carry out. Fully Insured and references can be supplied if required.
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Latest review:
Extensions- 9 Mar 2018
Kenny has just finished building a porch at my address. From the beginning, Kenny has been excellent with regards to providing advice, arranging the job to suit us and providing a very competitive and reasonable quote. Whilst on site, Kenny arrived early, was always extremely polite and the finished job was even better than we imagined it would be. On a scale of 1-10 we would honestly give Kenny an 11 and will definitely use his company again. Would definitely recommend him to others.
ROA HOMES LTD
No reviews yet
Extension Builder in Hertfordshire
Based in Bedfordshire, Great Barford. On our small family company Roa Homes LTD, I am a skilled and experienced bricklayer with over 14 years in the trade. Known for my neat and tidy work, I have served as a supervisor with top companies, giving me extensive expertise in reading drawings and managing technical aspects of construction. I specialize in a wide range of bricklaying services, including repointing, garden walls, flower beds, garages, extensions, and retaining walls, delivering quality craftsmanship in every project.
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Strongwell Construction LTD
No reviews yet
Extension Builder in Hertfordshire
We are an experienced family-run construction team specialising in extensions, renovations, and new builds. With years of hands-on expertise, we pride ourselves on delivering high-quality workmanship, attention to detail, and excellent customer service. From the first consultation to the final touches, we work closely with our clients to ensure every project is completed on time, on budget, and to the highest standards. No job is too big or too small — your satisfaction is our top priority.
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Crasia Building Limited
No reviews yet
Extension Builder in Hertfordshire
Bathroom and floor tiling, kitchen fitting, laminated floor fitting, doors fitting, painting
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4.6

Top rated Extension Builders

Our Extension Builders in Hertfordshire, are rated 4.6 out of 5 based on 18 reviews from customers like you.

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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 Hertfordshire?

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

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

What are the hourly rates of extension builders in Hertfordshire?

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

Find extension builders in Hertfordshire with MyBuilder

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

Step 2: Compare different extension builders in Hertfordshire

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

Step 3: Hire Hertfordshire extension builders with confidence

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

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

What to ask a Hertfordshire extension builder before hiring?

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

An extension builder in Hertfordshire 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 Hertfordshire 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 Hertfordshire?

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 Hertfordshire 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 Hertfordshire 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 Hertfordshire

Can an extension builder in Hertfordshire help with planning permission?

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

Many Hertfordshire 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 Hertfordshire help with materials and finishes?

Yes, most extension builders in Hertfordshire 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.