Extension Builders in Harpenden

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.5 (11 reviews)

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Some of our top rated extension builders in Harpenden

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Horwood homes and construction Ltd
Rating: 5 out of 5
Extension Builder in Harpenden
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. ⭐️⭐️⭐️⭐️⭐️
Adi
Rating: 5 out of 5
Extension Builder in Harpenden
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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Aston Brickwork
Rating: 5 out of 5
Extension Builder in Harpenden
My name is Sean Aston I have been a bricklayer for 6 years now. I have all kinds of experience, from working on a large construction site to smaller jobs such as extensions ,porch's and garden walls. Any and all tradesmen I use will be full qualified I also have all relevant insurance .
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Latest review:
Bricklaying- 30 May 2019
Sean was on time and very polite at all times. He completed the work very efficiently with no disruption whatsoever. He went out of his way to make sure the job was completed to our satisfaction. He cleared up afterwards and left the site very tidy. We would happily recommend Sean.
WOODLEY RAY LTD
Rating: 5 out of 5
Extension Builder in Harpenden
Woodley Ray was formed early this year by David Ray and Sam Woodley, both expirenced in all forms of construction for over 15 years. Mainly concentrating on domestic extentions, alterations and loft conversions. With already several happy customers happy to provide references. A limited company, VAT registered.
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Latest review:
Committed to delivering great work, and being a successful construction business owner. Strives to grow and get better at what they do there work is excellent. Had work completed both internal and external over a few years would highly recommend Woodley Ray Ltd they are very reliable & extremely professional.
Maytrix Construction Limited
Rating: 5 out of 5
Extension Builder in Harpenden
Maytrix Construction Ltd was formed in 2012, our management team and key staff has over 90 years of combined experience delivering high end construction projects, so you can be confident that our unique blend of expertise and experience means we deliver schemes to the exact level of detail demanded by our clients. Our Professional services include (not limited to): New Build Residential Property. Extensions and Alterations. Commercial Property. Educational & Public Sector.
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Latest review:
New build brickwork and block work done on budget and on time. Workmanship excellent. Maytrix kept me informed on progress and were very helpful tradesmen who were always on time.
Cinnamon Design Studios Limited
Rating: 4 out of 5
Extension Builder in Harpenden
Avenue Developments is a development consultancy, taking projects from inception to completion, in time and within budget. We offer our clients a tailored service, by evaluating each project to identify where value can be added and where potential problems may arise. We are committed to the quality of our professional service and have proven to satisfy our client's expectations.
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Latest review:
CAD / Drawings- 6 Dec 2019
Lack of professionalism! Called me at 2150 to say was interested in job, warning signal but said far enough so booked an appointment. He didn’t turn up nor respond to my texts asking if he was held up somewhere. I am not sure how trustworthy he is.
4 Seasons Construction Ltd
Rating: 5 out of 5
Extension Builder in Harpenden
Here at Four Seasons Construction we like to pride ourselves on delivering projects exactly to our customers requirements and expectations. We have over 20 years of experience within the building industry covering everything from garden walls to new build bespoke homes, so what ever your project might be rest assured you'll be in safe hands. Thank you for viewing our profile and we look forward to hearing from you about your next project!
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Latest review:
Bricklaying- 3 Jun 2017
Carl did some work to our brickwall. I found him to be very punctual, polite and professional throughout. He is competitively priced, cleared up after himself, kept within timescale and budget. I would be happy to recommend Carl to others seeking similar work.
Grand Improvements Ltd
Rating: 5 out of 5
Extension Builder in Harpenden
My business partner Jake and I have been in the building trade for over 15 years. We undertake projects of all sizes, giving professional advice to meet your renovation needs. Our customers are aways highly satisfied, which intern leads to repeat business. The Grand Improvements team are polite, tidy, efficient, and take pride in completing every job to a high standard.
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Latest review:
Plastering- 24 Aug 2020
Byron replied to a job quickly, quote was what we have expected and he accomodated specific date we needed this done by. Communication from the beginning until the end was great, he explained everything clearly, advised day before what time will they be arriving and arrived in time. Did a fantastic job plastering living room ceiling and cleaned up the floor afterwards as well. Very pleased and will definitelly be employing again for any future jobs. Thank you!
Asset Construction UK
Rating: 5 out of 5
Extension Builder in Harpenden
Asset Construction will assist with all your building needs, worries and liaise with all professional bodies from the start of your project no matter how large or small, we will construct your build to a high standard then on completion have it inspected by governing bodies. We are a one stop shop.
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Latest review:
Conversions - General- 19 Aug 2026
Andy did a wonderful job and transformed our garden. Our new paved garden and office/garden shed look amazing and much better than we expected. I highly recommend Andy and his team, we had a very pleasant experience overall.
Breheny building and landscaping
Rating: 5 out of 5
Extension Builder in Harpenden
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
P W Wall and Son Construction
Rating: 5 out of 5
Extension Builder in Harpenden
We are a family run construction business that typically take on projects such as new builds, extensions, refurbishments, conversions, landscaping and roofing. We will take on any job from small garden walls or patios to New build developments. The business was established in 1985 and has built a good reputation in and around Hertfordshire. We take on both domestic and commercial projects and cover areas in Hertfordshire and surrounding counties including London.
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Latest review:
Extensions- 20 Jan 2025
The team completed a large single storey extension approximately 12 months ago. The quality of the work carried out was of a very high standard and it still looks as good as it did when it was completed. The additional tradespeople that were brought in for specific tasks were all highly skilled and professional. The work quoted for was carried out on budget. As the work progressed, various additional tasks were needed but options for each of these were discussed and costed before they were undertaken. Communication was straight forward. We would not hesitate to use the company again if we need any further building work carrying out. before being undertaken,
Mars Building
Rating: 5 out of 5
Extension Builder in Harpenden
Mars Building is a local family run business with four generations of experience in the building and carpentry trade, all our workers are fully qualified and all our work is fully insured so if we're in your house you know you're in safe hands
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Latest review:
Carpentry- 19 May 2014
Ricky did an excellent job of removing and replacing my rear garage door, as quoted and kept it clean.
Tivadar
Rating: 4.8 out of 5
Extension Builder in Harpenden
To pleased the customers and quality of my Jobs it's my first priority. This is what have been doing for several years. My experience includes full refurbish. For any questions do not hesitate to contact me
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Latest review:
Restoration & Refurbishment- 26 Mar 2024
I hired him because he seemed very nice and honest. However, there was an issue with something that It wasn't done as I asked him and instead of trying to solve it he came to pick up the tools and leave me hanging with the job. I payed him for a job that he didn't finish and had to finish myself as I could. No attention to detail and wanted to finish things fast so he could move on to another job, which means the job was poorly done. His English is not very well so the communication was poor.
Roberts Plastering Services
Rating: 5 out of 5
Extension Builder in Harpenden
Hello everyone! My name is Robert, of Roberts Plastering Services LTD. We started by undertaking plastering, rendering and screeding works. Then, as the team increased, we undertake buliding projects as extensions and loft conversions. We focus on the high quality of the works as well as on the customer services provided. We provide quotes and advice for free and we are prepared to travel the extra mile to get the job done: friendly, on time and at high standard! Thank you!
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Latest review:
Extensions- 8 Nov 2019
Robert & Bobby did a great job for us! They've been honest, precise and patient. When we had unexpected situations on site they helped us to solve them professionally and in good time. They went the extra mile when we had a need, they were able to advise us and help us with our decisions as well. I lived in the house while they were working and they have always been careful in minimizing all the disruptions for myself and for my family. The extension that they built for us looks beautiful! I would definitely recommend them to others and personally I will try to work with them again in the future whenever I'll have a need. Thank you guys!
SJC Buiders
Rating: 4.4 out of 5
Extension Builder in Harpenden
GENERAL BUILDER
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Latest review:
Extensions- 13 May 2025
Steve and his team are great. From the initial enquiry through to completion Steve was prompt, professional, friendly and communicated continuously. Completed the job to a high standard and Im really happy with the finished porch. I would definitely use Steve again if I need any further work done. Very reliable. Thank you
Renov8BuildingContractorsLtd
Rating: 5 out of 5
Extension Builder in Harpenden
We are a professional,registered,fully insured construction company who carry out numerous projects annually,often exceeding client expectation. We repeatedly achieve this via our fully qualified tradesmen’s attention to detail and professionalism from start to finish. Along with our expertise in working alongside architects,engineers and building control to compliantly deliver projects certified upon completion we are 100% assured and confident that our clients will be too.
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Latest review:
Conversions - General- 26 Mar 2024
Steve and his team worked quickly and reliably on our project and were pleasant to deal with. Every time there was a difficulty, they found a way to overcome it. They were always on site when they were supposed to be and worked hard, so we made really fast progress. They also made adjustments because we were living on site and needed access to some facilities. All in all, we were really happy with the outcome and would highly recommend them.

3.5

Top rated Extension Builders

Our Extension Builders in Harpenden, are rated 3.5 out of 5 based on 11 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Harpenden?

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

Find extension builders in Harpenden with MyBuilder

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

Step 2: Compare different extension builders in Harpenden

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

Step 3: Hire Harpenden extension builders with confidence

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

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

What to ask a Harpenden extension builder before hiring?

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

An extension builder in Harpenden 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 Harpenden 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 Harpenden?

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 Harpenden 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 Harpenden 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 Harpenden

Can an extension builder in Harpenden help with planning permission?

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

Many Harpenden 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 Harpenden help with materials and finishes?

Yes, most extension builders in Harpenden 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.