Extension Builders in Knebworth | MyBuilder

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Some of our top rated extension builders in Knebworth

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B D construction
Rating: 5 out of 5
Extension Builder in Knebworth
Have been a builder for forty years family run business with my son’s working with me.
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Latest review:
Brad and his company have done various jobs in my house including painting and decorating - refurbing my bathroom (which is amazing) and putting a new roof on my shed. He also does a lot of conversion and refurbing work for the Property Investment company that I work for and all to a very high standard. He is professional and hardworking and wouldnt hesitate to use his company for future work as well
JR Brickwork
Rating: 5 out of 5
Extension Builder in Knebworth
I take on work covering all aspects of bricklaying, repointing, patio laying and any general maintenance work.
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Latest review:
Jack was punctual and professional and finished the work to a high standard. I will happily be recommending him to friends and family.
J Howard Construction
Rating: 5 out of 5
Extension Builder in Knebworth
J Howard Construction covers all aspect of building work to a high standard and Customer satisfaction is our main priority. We offer free no obligation quotes and advice.
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Latest review:
Joinery & Cabinet Making- 23 Oct 2023
I was excited about working with Josh as he had such great feedback from other clients, and he did not disappoint. Excellent communication right from the off and very clear about what was involved, so was able to provide a detailed quote all of which made sense. He thought through what was needed in advance so there were no surprises or delays on the day. His price was reasonable although I’d have been happy to pay a bit over the odds for someone who didn’t mess me around, as has sadly so often been my experience in the past. He arrived on time to do the work, did it, cleaned up - and even did a few extra little jobs for me around the house (putting up shelves and a guitar hanger) while waiting for the paint to dry. A lovely guy, clearly skilled at what he does, and definitely someone I’ll be calling on again. Don’t hesitate to hire him!
Pat Mcgeough
Rating: 4.9 out of 5
Extension Builder in Knebworth
McGeough & Sons Ltd is a family run business based in Bedfordshire. I am a time served carpenter with 27 years extensive experience in all aspects of refurbishments and building. Fully insured, contact us for a non obligated quote or advice
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Latest review:
Conversions - General- 4 Jan 2026
Pat was a pleasure to deal with from beginning to end he had everything covered and made the whole project a seamless experience. He provided me with a professional quote and had the patience to deal with my questions. He started the project on time svd no thing was too much trouble, when I needed a roofer to fix some issues with a leak he had someone on the job within a day. He handled every aspect of my garage conversion effortlessly and had the job finished on time right before Xmas. Would 100% use Pat again. Great guy who also knows good trades people. Thanks Pat.
OFIX Ltd
Rating: 5 out of 5
Extension Builder in Knebworth
With over 34 years experience I offer a complete design and build package as well as providing specific services for smaller contracts. I have been vetted by the Federation of Master Builders and strive to provide excellence. I am an extremely competent multi trader with a good eye for detail. With a team of experienced subcontractors I will deliver incredible quality installations on time within budget.
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Latest review:
Carpentry- 8 Mar 2025
Absolutely over the moon with Mike, he did a fabulous job. Would definitely recommend him!
Jay Truslove
No reviews yet
Extension Builder in Knebworth
Been roofing for 20+ years and went into building about 15 years ago. All aspects of work undertaken.
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schertel build Ltd
Rating: 5 out of 5
Extension Builder in Knebworth
we will always ensure quality service and respect to your property at the best available price. 7 years experience in brickwork, specializing mostly in garden walls
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Latest review:
Connor re-pointed my patio and I’m really pleased with the results. The finish looks fantastic and has made a big difference overall. He worked efficiently, kept everything clean and tidy, and was great to deal with from start to finish. Very reasonably priced too. I wouldn’t hesitate to recommend him. I will definitely be calling him back when I need other work.
Sinevir Construction
Rating: 5 out of 5
Extension Builder in Knebworth
Sinevir Construction Ltd is a trusted construction company based near London, proudly serving the capital and surrounding areas. We specialise in residential and commercial projects, including new builds, extensions, refurbishments, and structural works. Our team of qualified professionals is committed to: High standards of workmanship Full regulatory compliance Clear and honest communication throughout every stage of the project Whether it's a small private renovation or a complex public contract, we approach each project with care, precision, and professionalism. What sets us apart: ✅ Construction Online Gold Member ✅ Skilled and experienced workforce ✅ NEBOSH-certified site safety supervision ✅ CHAS and SSIP-accredited for health & safety standards ✅ Fully insured, giving clients peace of mind ✅ Transparent pricing and realistic scheduling ✅ Respect for architectural heritage and local communities ✅ Competitive rates without compromising on quality We believe every property deserves thoughtful construction and reliable service — and at Sinevir Construction Ltd, we proudly deliver both.
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Latest review:
Extensions- 27 Mar 2026
Ruslan was excellent at his craft. Very hard working, very clean and professional with a great attitude. Would highly recommend this company
O D Thomas Builders Limited
No reviews yet
Extension Builder in Knebworth
Experienced and reliable local builder with over 15 years building trade experience. Based in Datchworth, Hertfordshire covering all aspects of building work including extensions, new builds, refurbishments, groundwork, carpentry. Established for over 10 years working in the local area.
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CNR Bricklaying & Building Services
Rating: 5 out of 5
Extension Builder in Knebworth
CNR Bricklaying & Building Services. A friendly, family run brickwork business who speialise in all types of brickwork and restoration.
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Latest review:
Bricklaying- 19 Apr 2016
We have always found it a problem trying to match the correct tradesman to any work we have needed doing, so much so that many jobs have been left undone. You either end up with a personality clash, or just plain bad workmanship, well not this time. The entire process was a joy from start to finish, from the initial quoting process, to the completion and the standard of work was exemplary. Nothing seemed to be a problem for them and they were very pleasant to have around. We are busy drawing up a fresh list of jobs we need doing and would certainly thoroughly recommend them. If you have had any bad experiences in the past, give them a try, you will be very satisfied.
Kev home improvement
Rating: 5 out of 5
Extension Builder in Knebworth
15+ years of building experience ! We are new on MyBuilder Garden design Paving, Driveway specialist Foundation Porch Extension General building Complete refurb
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Latest review:
Landscaping- 24 Jun 2025
Razvan and his team were incredible! Really polite, lovely guys. Kept the site clean and tidy. Did an incredible job - absolutely in love with our new patio!! Cannot recommend enough!
UK NAMA Constructions Ltd
Rating: 5 out of 5
Extension Builder in Knebworth
Garden Fencing, Garden Decking, Artificial Grass, Wooden Floor Laminating, Decorating, Partitions.
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Latest review:
Carpentry- 1 Sep 2026
Ali did a great job from start to finish and will definitely invite him back in the future!
U & A Builder
Rating: 4.9 out of 5
Extension Builder in Knebworth
We've been ground-workers for over 16 years now and we've got lots of experience. We specialise in many aspects such as groundwork, driveways, landscape gardening, underpinning, paving, foundations, extensions, fencing and general building work. Our jobs have a warranty and also guarantee to complete all jobs to a high standard.
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Latest review:
Landscaping- 19 Mar 2024
Completely professional from start to finish. Urim and Aryam are both excellent communicators, which made a huge difference in planning the drainage for our patio, and rebuilding our front steps. We had every confidence in them from the outset and they fulfilled all our expectations. A great team!
Ladkarn Construction Limited
Rating: 5 out of 5
Extension Builder in Knebworth
We are a well established construction company with very high expectations and standards of work. We are fully insured and carry out groundworks and landscaping and have a very professional team of operatives ensuring the quality of the works completed match our very high standards. We can carry out larger projects relating to the full construction of houses, extensions or conversions.
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Latest review:
Groundwork & Foundations- 11 Jul 2026
James is just brilliant! Did a great job.
Zak longthorpe
Rating: 5 out of 5
Extension Builder in Knebworth
I’ve been in the building industry for 12 years. Originally building/ renovating different projects in wales Untill I moved to London 7 years ago. Up until recently I was a project manager for a large brickwork company building projects across central London. I have recently bought a house and moved to letchworth so now relocating my work. with a close team of guys we ensure all work is done to an extremely high standard. Would be happy to give a quote. reliable!
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Latest review:
Extensions- 1 Jan 2022
Definitely the best tradesperson I have ever had to deal with. Zak took great pride in every stage of the job and advised on changes required as the job progressed. Nothing was too much trouble. The quality of the work was really good and we are really pleased with the completed job. We would highly recommend Zak to anyone requiring building work done. Additionally the price quoted and paid was extremely competitive. Zak is also very easy to deal with and always has a friendly face to brighten your day.
imsbuilders
Rating: 5 out of 5
Extension Builder in Knebworth
I have over 40 years of experience in the industry. I am a fully qualified bricklayer and also a fully qualified carpenter. I have had the pleasure of constructing many extensions new builds and home renovations for my clients, ensuring the whole project runs smoothly and safely
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Latest review:
Carpentry- 28 Apr 2024
Great experience. Bill was very nice, knowledgable and quickly fixed an issue with our unsupported floorboards, for excellent value too. Would definitely recommend!