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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Ovi
Rating: 5 out of 5
Extension Builder in Hertfordshire
Ovi the builder offers a comprehensive service specialising in loft conversions, extensions and refurbishments. We hold over 20 years experience within the construction industry, providing a high standard of work focusing on quality and ensuring a job well done.
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Latest review:
Plastering- 8 Sep 2026
Tidy and professional finish.
Adi
Rating: 5 out of 5
Extension Builder in Hertfordshire
Hi, I'm a bricklayer living in Luton I'm part of a team of bricklayers, we can work for you if you wish it . We did already a lot's of extenshions and houses in differents sites .
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Redrose construction (Herts) Ltd
No reviews yet
Extension Builder in Hertfordshire
I am an experienced builder with a passion for providing excellent customer service and high quality work. I have been in the building trade for over 15 years, branching off a successful family building company I have started Red Rose construction. Red Rose Construction specialises in brickwork and covers all areas of general building. We also offer services in the traditional side of the industry ie. Repointing of heritage houses, traditional brickwork, heritage brick cleaning and damp surveying. Red Rose Construction prides themselves on reliability, hard work and attention to detail. All our work is fully insured. Reach out for a chat or quote with one of us, we will be happy to help.
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H P JONES BRICKWORK LIMITED
Rating: 5 out of 5
Extension Builder in Hertfordshire
With over 15 years experience, H P Jones Brickwork Ltd prides itself on providing a trustworthy and efficient service to the highest standard. We understand having work carried out can be stressful. But whilst providing you with top workmanship throughout your project, our team aim to keep disruption to a minimum. Customer care is paramount in our service and we believe that regular communication with our customers is key to ensuring they are happy with the service provided.
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Latest review:
Harry was a wonderful contractor to use. Polite, friendly, kept us informed on how the work would take and how it was progressing. Extremely professional, I wouldn't hesitate in using him again and recommending him to family and friends.
Miro Builder's UK Limited
New on MyBuilder
Extension Builder in Hertfordshire
Hello! My name is Mirosław, and I am the founder of a trusted local construction company. With over 20 years of hands-on experience in the building industry, I take pride in delivering top-quality craftsmanship and stress-free service to every client. We handle every project with complete care, precision, and dedication. What We Specialize In: Turnkey Home Builds: From laying the foundation to the final decorative touches, we build complete custom homes from the ground up. House Extensions: Need more room for your growing family? We design and build seamless single- or multi-story additions that perfectly match your existing home. Driveways & Paving: Durable, beautifully finished block paving, resin, and gravel driveways that instantly boost your property's curb appeal. Gardens & Landscaping: Complete outdoor transformations, including patios, retaining walls, fencing, and custom garden layouts. Why Work With Us? 20+ Years of Experience: Solid expertise you can count on at every stage of the build. Complete Project Management: We handle everything from start to finish so you don't have to stress about coordinating different contractors. Quality & Reliability: Clear communication, honest timelines, and high-standard workmanship.
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Sami
Rating: 5 out of 5
Extension Builder in Hertfordshire
Hi, I am a fully skilled plastering with 15 years of experience delivering quality work to your home.I also have experience in all other relating trades like external wall insulation,silicon rendering ect.
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Latest review:
Plastering- 9 Aug 2026
Excellent job. Samis quality of work is second to none , he really cares about his work and is confident he can deliver , which he did. Extremely happy with the render and would highly recommend .
Soraya Construction Ltd
Rating: 4.2 out of 5
Extension Builder in Hertfordshire
I am running construction projects for over 25 years. My projects include: construction houses, extensions, lift conversion, comercials, external and internal renovation, pavements.
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Latest review:
Restoration & Refurbishment- 28 Apr 2024
I highly recommend these people if you want to be fleeced, taken advantage of, treated appallingly and work left unfinished. The standard of work is below average. If you want high quality finishing do not come here. I’ve had to spend a lot to redo a lot of their mistakes and mess. If Jerzy could charge you for every single nail he would, so beware. And when you challenge, they get aggressive and nasty. Very unprofessional. Do yourself a favour and keep away. So thanks Jerzy and co for a load of stress and rubbish. I am happy to talk to anyone and advise against these people.
p&d building services
Rating: 5 out of 5
Extension Builder in Hertfordshire
We are a professional Building Company,specialising in house extensions, loft conversions,refurbishments,new builds,etc.With over 18 years of working experience in UK,we have gained a good name through hard work,professionally done and a good working relationship with our customers.
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Latest review:
Roofing (Pitched)- 11 Jun 2015
Paul has done a good job quickly with reasonable price.
Dash Carpentry & Construction
Rating: 5 out of 5
Extension Builder in Hertfordshire
Refrubishments, extentions loft conversions All aspects of first and second fix carpentry to a high quality standard. All aspects of roof works including tiling, slating, roofing membranes and lead work
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Latest review:
Carpentry- 24 Mar 2019
Amazing turn around time on the build of the cabin. Full of knowledge and advise to help make the right decision and helped make a room inside the cabin with work being so clean and accurate. Looking forward to having him back for future projects. His work shows his skills in carpentry are very good! Everyone loves the cabin, thank you!
P C Bondea Limited
Rating: 4.7 out of 5
Extension Builder in Hertfordshire
I'm very punctual, reliable and sociable. Attention is paid to every detail. I always treat customers with respect, and my moto is: If a job is worth doing, it is worth doing properly. Everything is left clean and tidy. My focus is on ensuring a quality job and making the customer happy.
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Latest review:
Carpentry- 19 Oct 2015
Paul came to repair the wardrobe doors. He did an excellent job, very accurate and professional, arriving on time and communicating well. Without asking he also changed the screws in wardrobe to make it more strong. Highly recommended.
M.Timmins & Son
No reviews yet
Extension Builder in Hertfordshire
We are a family-run business with over 40 years of experience in the construction industry. Specialising in brickwork and hard landscaping, our team of skilled builders takes pride in undertaking all aspects of these crafts. With a long-standing history of successful trading, we bring a wealth of expertise and dedication to every project we undertake.
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Vb builders ltd
Rating: 5 out of 5
Extension Builder in Hertfordshire
I have over 25 years’ experience in the construction industry. I am the Managing Director of VB builders and I work hands on with a small team completing a variety of projects including extensions and loft conversions. Trust and customer service are the utmost importance to us.
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Latest review:
Extensions- 25 Feb 2020
I was hesitant at first to ask VB builders to quote, as they had no reviews but now I know why - he gets work through word of mouth, so doesn't need to advertise! I chose Vedat because he seemed trustworthy and attentive, he didn't let us down. He was happy to give references and took a keen interest in our plans. Vedat worked continuously to complete our job. He and his team worked very hard to complete our work to a really high standard. We'd be happy to recommend him.
Horwood homes and construction Ltd
Rating: 5 out of 5
Extension Builder in Hertfordshire
At Horwood Homes and Construction we aim to work with our customers to achieve projects to the highest standard, using our experienced team of brickwork specialists, we help you to plan and build any job size from garden walls to complete new build projects. After many years of working with bespoke builders we have gained the ability to complete the most challenging of builds and we believe any job is possible with good communication, a clear understanding and a passionate team. Please get in contact with us today for any advice or a free quotation. Please check us out on Instagram (horwood_brickwork) Or Facebook and Checkatrade (Horwood homes and Construction) Thanks Horwood_hc
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Latest review:
Highly recommend Phil. He took time to understand my requirements and offered a competitive price for the job. Work was completed in a timely manner and to a very high standard. Thanks Phil I will be using you again in the future for any building projects. ⭐️⭐️⭐️⭐️⭐️
ERIC GROUP LTD
Rating: 5 out of 5
Extension Builder in Hertfordshire
Eric Group Ltd has been trading for over 10 years and has completed numerous refurbishment and fit-out projects. We offer free survey and estimates and free specialist advice. If you want a new kitchen, a new bathroom, a house extension or a full house refurb, get in touch for a chat.
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Latest review:
The Job was to extend the rear of the house on the ground floor, open up the kitchen and reception room into one open plan living area, to refresh the rest of the house which included new plaster skim, doors and frames and to fit new bathrooms and kitchen as well as an rewire on the whole house and the construction of a retaining wall in the garden to accommodate the extension. Florins team were excellent from start to finish, the whole project was completed in record time to a very high standard. The 10 weeks turnaround was incredible, we were very happy that Florin was always here at the property or on the end of the phone throughout the process, his professional advice and smart ideas made for a smooth transition from room to room. The team were very hard working, polite and knowledgeable, these guys worked very hard and very quickly which was amazing to see and I was very grateful we were able to move into the property earlier than planned which even saved us money on the temporary accommodation we had! Can’t thank you enough Florin, any small issues we had were dealt with quickly and smoothly, I love the house, the level of work and would 100% use Florin and his team on my next project!
L R Harvey (Builders) Ltd
Rating: 5 out of 5
Extension Builder in Hertfordshire
I am a local builder with 35 years experience in the trade. I am reliable and trustworthy with a reputation for being clean & tidy. I specialise in brickwork, hard landscaping, extensions from start to finish & internal alterations. I work closely with all my clients to ensure that they are pleased with the results.
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Latest review:
Groundwork & Foundations- 5 Mar 2021
Very professional and all round lovely person punctual, professional and honest Would highly recommend L R Harvey builders, don’t hesitate give him a call.
Breheny building and landscaping
Rating: 5 out of 5
Extension Builder in Hertfordshire
We are professional builders with 4o years experience and 3 generations in the profession, pride our selves on providing good communication and quality of work , and we try to use environmental efficiency on all our projects . 40+ years experience in the building and landscaping trade , friendly and reasonably priced . We have folling certificates Level 2 brick work Street works licence All machinery licenses digger dumper etc Water civils and electric civils license Can supply grab lorry and have waste carrying license .
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Latest review:
Breheny builders visited my property gave me a quote and did a very good good job of the patio exactly in the time frame needed also within my budget they were well mannered and reliable I would definitely recommend and I will be using again to do my drive way

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.

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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.