Extension Builders in Knebworth | MyBuilder

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Some of our top rated extension builders in Knebworth

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JDL Construction
Rating: 5 out of 5
Extension Builder in Knebworth
JDL Construction Limited are a Hertfordshire based building company offering both domestic and commercial services. We specialise in all aspects of construction including Home Extensions, New Builds, Garage Conversions as well as specialist Brickwork Contractors. Our company is fully insured and our tradesman are all fully qualified. JDL are members of many trade associations including Constructionline, CHAS, Federation of Master Builders and Federation of Small Businesses.
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Latest review:
The project was to construct a 15m2 extension to our rear lounge on the ground floor plus a 4m2 extension to the bathroom on the first floor. This involved foundations, walls and roof tiling in addition to the installation of a 5m long RSJ to support the first floor bedroom. Jamie was selected because of his recent training and apparent enthusiasm. He planned and carried out the work very well. Problems when encountered were discussed and resolved with professionalism and enthusiasm. The resulting work has been completed to a high standard and I am well satisfied with the result. The time taken was as planned, he worked on a daily rate which was to my budget. Jamie' strengths are a good basic knowledge of the building regulations, good communication skills with other workers, suppliers and inspectors and excellent basic brick laying skills with a eye for dimensional regularity and excellent final appearance. I would strongly recommend this young and enthusiastic tradesman for any similar project work involving use of his excellent bricklaying skills.
R.H. Plumbing & Heating
Rating: 5 out of 5
Extension Builder in Knebworth
20 years experience in the trade, I have worked with 24 hour maintenance and emergency companies gaining untold amount of knowledge on all sorts of plumbing systems. More recently I have been working on big building sites installing from new, house refurbishments, bathrooms and boiler changes.
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Latest review:
Plumbing- 24 Sep 2024
Ross did a fantastic job replacing our very dodgy main stop cock with a new quarter turn valve for a very reasonable price and on the same day we called him out to quote for it. He was courteous and polite and I would have no hesitation recommending him to anyone who needs plumbing work.
Milestone Brickwork
Rating: 5 out of 5
Extension Builder in Knebworth
Local bricklayer based in herts and Essex, we also undertake patios and fences.
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Latest review:
Jack came and quoted to lay a new patio and a shed base. He listened to exactly what I wanted (something other workmen didn’t do!) and came back with a very reasonable quote and said he would complete the job on a weekend as I wanted it done asap. From start to finish Jack was really polite and friendly and worked really hard to get the job finished - so much so, I’m adding more bits to the garden and will get Jack back over to do it!
My Craft Building Solutions Ltd
Rating: 5 out of 5
Extension Builder in Knebworth
My Craft Building Solutions Limited are a family run business, and we offer all aspects of building services. No job too big or too small with a lot of our work done for Anglian home improvements we understand the importance of customer care We specialise in: Extensions Conversions Porches Bricklaying
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Latest review:
Groundwork & Foundations- 27 Sep 2023
A team of 3 bothers, nice guys and did a good job. maybe a little over priced but I did agree the price before, so really I cannot complain.
ELITE UPGRADE SOLUTIONS
Rating: 5 out of 5
Extension Builder in Knebworth
With two decades of hands-on experience, I bring a wealth of expertise to every home improvement, maintenance, and handyman job. As a solo trader, I offer a personalized approach, ensuring each project receives the attention and care it deserves. From indoor renovations to outdoor garden buildings, I am proficient in a range of skills, delivering high-quality results that exceed expectations. Trust me to enhance your living space with precision and dedication, backed by 20 years of proven craftsmanship.
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Latest review:
Handyman- 28 Oct 2024
Martin was responsible, punctual, and good at what he does. He explains things well and the communication was great, considering that I have been remotely managing this project, never on site! Will use again.
BUILD ON TIME LTD
Rating: 4.9 out of 5
Extension Builder in Knebworth
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!
Mars Building
Rating: 5 out of 5
Extension Builder in Knebworth
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.
Choice Build
Rating: 5 out of 5
Extension Builder in Knebworth
We are a small team specialising in plastering, carpentry and building. We can carry out full refurbishments, removal of load bearing walls, extensions, garden rooms, garage conversions and much more. With over 15 years each in our trades we strive to complete every job to the highest finish and feel combing plastering and carpentry we have the skill sets to do this. Electric and plumbing works are carried out by qualified tradesmen
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Latest review:
Restoration & Refurbishment- 14 Aug 2020
Excellent work ethic and attention to details. All-round nice guys to have around, finished the job on time and left in a tidy manner.
AJ Construction
Rating: 4.8 out of 5
Extension Builder in Knebworth
Me and my team are very friendly, hard working, dedicated and ambitious builders who always put the customers wishes first. our motto is "create a space to enjoy” We specialise in carpentry and brickwork however we have a lot of experience in every aspect of building.
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Latest review:
Carpentry- 25 Jun 2026
Joe came to fit skirting, fix floorboards and lay mdf flooring. Joe was always willing to answer any query I had, being a novice myself. I would recommend him and his team. Happy with the work he has done.
Hertford Build Ltd.
Rating: 5 out of 5
Extension Builder in Knebworth
Hertford Build Ltd specialises in all aspects of building, including bespoke carpentry, extensions, garage conversions, kitchens and garden out buildings. We pride ourselves on being reliable, efficient and professional and can offer free quotations and advice on all your building needs. We understand that work being completed at your home can be stressful. For this reason we carry out every job as if it were our own and ensure it runs smoothly, on time and completed to the highest standard.
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Latest review:
Quick and efficient workmanship. Quality of work exceptional at a great price.
TPS Groundwork & constrution
Rating: 5 out of 5
Extension Builder in Knebworth
extensions, driveways,paving,groundwork
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Latest review:
Bricklaying- 6 Nov 2020
Tony gave me a competitive quote, not the cheapest but everything about him was professional and gave me confidence. His team arrived on time the day of the build and were helpful and pleasant. They worked all day and cleaned up and covered their work until they arrived on time the next morning. They worked hard all day. After the wall and piers were build all the brickwork and joints were left clean and crisp. I am very happy with the wall. I have renovated many properties over the years and the standard of this job was excellent. I highly recommend them.
PS Brick Block &Home Improvement LTD
Rating: 4.7 out of 5
Extension Builder in Knebworth
All type of building works to high standards. - extensions - lofts - plumbing - electric - decorating - new build - patios - driveways
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Latest review:
Extensions- 4 Nov 2023
Overall me and my husband are very satisfied with the workmanship and with the final result of our my fake cladded garage door with the new aluminium framed window. The original garage was converted into a habitable room 7 years ago with only a rooflight to bring light into the room, which is now my husband's office and this new window will make a lot of difference therefore we are very happy with the finished work. The work was done very quickly, the builders turned up on time and they were very efficient and helpful, they took particular care when installing the composite slatted panels to the marine plywood. The main contractor Pawel Speiwak also came on site to inspect the works during construction. The quote was also very competetive, a good value for money. I would definetely use them again for any future work in my house and recommend them to other people.
SFL Construction Ltd
Rating: 5 out of 5
Extension Builder in Knebworth
SFL Construction is a Hertfordshire-based construction company, building a wide range of structures and completing all construction phases from the foundation to the roof and everything in between. Our team brings years of experience and expertise to every project we undertake.
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Latest review:
Ryann and his team first completed a multiple room ground floor extension for us, including the installation of a new kitchen and bathroom. We were so pleased with the work that we asked him to build an outdoor garden room from scratch and completely refurbish our other bathrooms. We have always found Ryann to be friendly, punctual, knowledgeable and honest and I am more than happy to give my recommendation.
Jgs carpentry
Rating: 5 out of 5
Extension Builder in Knebworth
Jgs carpentry & building services. We are hardworking, trustworthy carpentry and building company based in Hoddesdon. With 20 years experience in the building trade doing anything from hanging a few doors to loft conversions and extensions
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Latest review:
Carpentry- 23 Nov 2019
We had 7 new internal doors fitted. Really great job, very pleased. Would highly recommend.
T & J Services
Rating: 5 out of 5
Extension Builder in Knebworth
T & J Services are experienced construction and demolition specialists. We specialise in the following: •General Building •Extensions •Conversions •Demolition •Strip Outs •Driveways •Landscaping •Groundwork
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Latest review:
Demolition- 31 Oct 2025
Came on time & supplied a reasonable price. Started the job in good time & when additional work was needed, gave a very competitive additional sum. Completed in good time. A good job was done. Well definitely consider them for any other work & have recommended them to a friend.
D Halpin
Rating: 5 out of 5
Extension Builder in Knebworth
Hi my name is Dan I have been bricklaying for over 20 years.i don’t mind what the job is small or big and I am responsible priced
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Latest review:
Bricklaying- 12 Sep 2026
Great guy. Great job