Extension Builders in Knebworth | MyBuilder

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Some of our top rated extension builders in Knebworth

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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.
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.
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.
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.
Ervis
Rating: 5 out of 5
Extension Builder in Knebworth
I’m a reliable and skilled handyman with several years of experience in the construction industry. I specialise in carpentry, joinery, hard flooring, and a wide range of general home repairs and maintenance. I take pride in delivering high-quality workmanship, completing every job to a professional standard and exactly to my clients’ requirements. I’m always happy to offer honest advice and practical solutions to help you get the best results for your project. Whether it’s assembling furniture, fitting doors, installing flooring, repairing woodwork, or tackling general handyman tasks, I’m committed to providing a dependable, friendly, and competitively priced service. Customer satisfaction is my top priority, and I always leave every job clean, tidy, and completed to the highest standard.
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Latest review:
Carpentry- 6 May 2024
Ervis is a consummate professional. I have been in the property business for 15 years, and every now and then, you come across a great tradesman - someone who is professional, hardworking, punctual, and passionate about their craft. I will definitely use Ervis for my future projects. Thank you, Ervis."
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- 5 Jan 2026
Would thoroughly recommend Dan. He was friendly, prompt and did a great job repairing our brick wall.
Devi
Rating: 5 out of 5
Extension Builder in Knebworth
Shehu builders With many years of experience in construction industry, I work to very high standards and my customers are always extremely satisfied with my work.
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Latest review:
Restoration & Refurbishment- 3 Oct 2025
Devi is a very nice, polite and more importantly calm man. He has just finished renovating our entire flat to a very good standards. Thank you Devi!
Go&Ko Services Ltd
Rating: 5 out of 5
Extension Builder in Knebworth
Go&Ko Services LTD is a 24 hours Property maintenance company for the Public and Commercial with trust and confident in quality and high standard services. Our offers the following services on a residential and commercial basis: - General Building/Extension - Loft conversion - Refurbishment - Kitchen/bathroom installation - Carpentry - Tiling/Flooring - Plumbing - Drainage - Metal restoring/welding - Electrical - Decorating - Handyman - Fencing/Decking -
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Latest review:
VERY PROFESSIONAL WORK AND GOOD COMMUNICATION
Cc brickwork
No reviews yet
Extension Builder in Knebworth
Brickwork Repointing Extensions Any aspect of building
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JK carpentry & Loft Conversion Specialist
Rating: 5 out of 5
Extension Builder in Knebworth
We have over 14 years of experience in the field of carpentry, joinery, roofing and loft conversions. We are based in Hertfordshire and are likely to have seen our name about. With having the experience and qualifications we take huge pride in our work making sure all jobs are carrried out to a high and reliable standard. We offer a free no obligation quote and advice to all potential customers.
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Latest review:
Carpentry- 17 Nov 2019
Really impressed with how reliable and professional Josh was. He visited to quote the job, turned up when he said he would and was really friendly. I've already recommended him to my parents as they need some fitted wardrobes.
RDP Construction
Rating: 5 out of 5
Extension Builder in Knebworth
Small building company covering all aspects of building specialising in bathroom & kitchen installations , experienced tradesman with a huge knowledge of the building trade with polite free advice given & free quotations. If you require more pictures of my works then drop me an email and I can send them . Regards Mr R D Pulfer
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Latest review:
Bathroom Fitting- 24 Feb 2020
Russell finished our bathroom in high standard. We are so happy that we found him. I trust his work and I would recommend him over and over. Thank you Russell!