Extension Builders in Hertfordshire

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.9 (15 reviews)

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Some of our top rated extension builders in Hertfordshire

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F.A.D plastering and home improvements
No reviews yet
Extension Builder in Hertfordshire
Been doing my job for 20+ years now so lots of experience and happy customers , my main trade is plastering but I also cover lots of other jobs to help improve people homes, and know it’s been done properly,and to a high standard,based in Hertford but can travel
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R m Walker
Rating: 5 out of 5
Extension Builder in Hertfordshire
Qualified Builder/Brickwork Specialist Hi, i’m a qualified builder. I do extensions, renovations and new builds, also hard and soft landscaping, patios, drive ways and fencing. Also have a good professional team behind him and with over 20 years experience. Please feel free to contact me if you need any of the following work doing and I will be happy to come and provide a free quotes and estimates and any advise. I also have excellent references
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Latest review:
Bricklaying- 20 Feb 2020
very good. honest and reliable
Newstar Building Services Ltd
Rating: 4.9 out of 5
Extension Builder in Hertfordshire
HI my name is Bill and I run a building company. All our work is base on recommendations costumers We work all around London.
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Latest review:
Hard Flooring- 22 Oct 2025
Enea did an incredible job, and we’re beyond happy with the final result. He was very accommodating, helped us choose the right tone of varnish beforehand, and kept us updated throughout the day by sending pictures of his progress (as we were both at work). Enea is trustworthy, and even though we didn’t have the chance to meet him in person, he left the flat securely, taking care of our keys and door. We highly recommend Enea!
Vertex Projects
Rating: 5 out of 5
Extension Builder in Hertfordshire
Vertex Projects is a professional and trusted construction partner dedicated to bringing your vision to life. We specialise in a comprehensive range of services, including painting and decorating, building extensions, expert demolition, and plastering. Our expertise also extends to new fencing and the custom construction of bespoke balconies. At Vertex Projects, we pride ourselves on being a respectful team that treats every home and site with care, ensuring high-quality craftsmanship and a seamless experience from start to finish.
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Latest review:
Hard Flooring- 7 Jul 2026
Straight forward process with no hiden costs. The work was completed to a good quality with the new flooring in the garden outhouse and the waste removed. Will hire again in the future.
D inch property development
No reviews yet
Extension Builder in Hertfordshire
I have 30 yrs in the building industry from fitting kitchens & bathrooms to building houses from the first brick upwards, extensions loft conversions . I pride myself in being very professional at all times .
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Jales construction
No reviews yet
Extension Builder in Hertfordshire
Hi my name is Marcelo, I have been in the building trade for over twenty years. I’m good at what I do and I take pride in my work. I always make sure I do it right and up to a professional standard.
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Lighthouse Crew Limited
Rating: 5 out of 5
Extension Builder in Hertfordshire
We are new business on the market although we are in construction for over 20 years. We are bringing experience from projects that we were working on throughout many years of service for commercial, domestic and insurance clients. We are offering kitchen and bathroom installation, hard floor fitting, refurbishments, complete remodeling, masonry repairs and structural repairs.We are aiming at complete refurbishments, extensions and conversions, including underpinning and structural strengthening.
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Latest review:
Joinery & Cabinet Making- 28 Oct 2022
Rafal was very helpful, and came up with alternative solutions to the job too from what I'd first suggested. He was prompt, cleaned up each day, and did a really good job which I'm very happy with. It was slightly worrying not to get a confirmed price for the work beforehand, just an estimate, but it turned out that was because it was hard to tell the time the job would take, and in the end what he did charge produced a really good result. I'd highly recommend him.
Homebuild Solutions (UK) Ltd.
No reviews yet
Extension Builder in Hertfordshire
Im the director of Homebuild Solutions (UK) Ltd, born in the UK with a Greek Cypriot back ground, we are known for our quality of builds. We are specialists in our field for over 25 years. Known for bespoke builds and of how clean and conscientious we work on site with attention to detail from start to finish. I project manage and I am hands on alongside my in -house hand picked team, we are more like a family and have a great repore with our clients. Always willing to show you around some of our jobs and talk with our previous clients.
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Herts sparks ltd
No reviews yet
Extension Builder in Hertfordshire
At Herts Sparks, we specialize in delivering high-standard electrical installations and bespoke designs tailored to your needs. With a keen eye for detail and a commitment to quality, we work closely with our customers to bring their vision to life-whether it’s a stylish home renovation, a cutting-edge commercial fit-out, or a complex industrial project. Our expert team ensures every installation meets the highest safety and efficiency standards while maintaining competitive pricing. From concept to completion, Herts Sparks is your trusted partner for reliable, professional, and innovative electrical solutions. Quality. Precision. Affordability. That’s the Herts Sparks promise.
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Golden Eagle roofing and building contractors
No reviews yet
Extension Builder in Hertfordshire
Golden Eagle Roofing and Building Contractors prides itself on integrity, transparency, and a professional approach to every project, no matter the size. Our team of skilled professionals works closely with clients from the initial concept and planning stages to final execution, ensuring a seamless and stress-free construction process. We use only the finest materials and latest techniques to guarantee durable, high-quality results that stand the test of time. Why Choose Us? Experienced Professionals: Years of industry experience and a wealth of knowledge brought to every project. Quality Craftsmanship: A dedication to upholding the highest standards of workmanship and using quality materials. Customer-Focused Approach: Committed to understanding unique requirements and exceeding expectations with open communication and transparency. Licensed & Insured: For your complete peace of mind, all work is performed by a properly insured and licensed team. For your next roofing or building project, contact Golden Eagle Roofing and Building Contractors to discuss your requirements and discover the difference that quality and dedication can make.
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BUILDING BLUEPRINTS
Rating: 5 out of 5
Extension Builder in Hertfordshire
A highly experienced and qualified contractors from a Carpentry & Joinery background. Taking on diverse scoped projects ranging from Domestic to Commercial.In the residential sector from renovations and refurbishments at the same time carrying many trades in house. We are ready for your project
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Latest review:
Carpentry- 19 Sep 2015
Not only was Ian's quote to do the loft conversion very reasonable, he was very reliable, tidy & very helpful when we had a difficult situation. The work was done in a quick time, when he said he was going to be on site he was, at no time did he let me down. The standard of work was excellent, I would recommend Ian & wouldn't hesitate to use him in the future.
EM Precision Construction
New on MyBuilder
Extension Builder in Hertfordshire
Professional and reliable loft conversion and carpentry specialists. We provide high-quality workmanship, honest pricing and excellent customer service. We are committed to delivering every project safely, on time and to the highest standard. Free quotes available.
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J J Kelly & Sons Ltd
No reviews yet
Extension Builder in Hertfordshire
J J Kelly & Sons Ltd is a distinguished family-run business nestled in the vibrant community of Round Green, proudly extending its exceptional services throughout Bedfordshire for over 35 years. As experts in the field, we specialise in a comprehensive range of trades, including building, extension building, loft conversions, garage conversions, and renovations. Our proficiency also encompasses new builds, construction, and civil engineering, making us the go-to choice for projects of any scale.
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Mbalau Construction LTD
Rating: 5 out of 5
Extension Builder in Hertfordshire
Builder with 20 years of experience . I provide a wide range of building services such as: loft conversion, extensions,bathroom refurbishment,house refurbishment , plumbing and electric etc . I have the tools,knowledge and team to build a house from start to finish . I can provide references and pictures of previous work upon request .
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Latest review:
Complete refurbishment of 2 bed 1100 sq ft flat. Including removal internal walls Ripping out and renovating 2 bathrooms. Involving new layout replumbng and relocation of #electrics. Tileing Preparing and laying wood flooring throughout. Fitting shelving and book case. The work over 2 months involved all building skills. Throughout Marcel and his highly skilled crew were efficient clean and resourceful. I would highly recommend for all building and decoration work.
BOTNARI CONSTRUCTION
Rating: 4.4 out of 5
Extension Builder in Hertfordshire
We provide a service of maximum quality and client satisfaction . Having over 25 years experience in the field we have completed jobs big and small to the best standard .
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Latest review:
Electrical- 26 Jul 2026
Genuinely one of the worst builders we have come across. David rewired the flat and Stefan plastered the hallway. David is NOT qualified as an electrician and cut corners wherever he could. David leveraged us for money mid job and in the end left the job without finishing and without providing a certificate. David ran cables behind door frames (awful idea), got the cheapest material, forgot where holes were for spotlights and switches among many issues which meant we had to constantly ask our builders to fill the holes and make good. Stefan did the hallway plastering without putting on mesh. The plaster cracked within 2 weeks and the paint keeps cracking and will be a constant problem. When asked to come back and fix the issue - he point blank refused. They were the cheapest quote but we really hope we had gone to someone else
IAC LTD
No reviews yet
Extension Builder in Hertfordshire
Hard working and responsible person
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3.9

Top rated Extension Builders

Our Extension Builders in Hertfordshire, are rated 3.9 out of 5 based on 15 reviews from customers like you.

Quality screening

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.