Extension Builders in Harpenden | MyBuilder

Describe your job with details to view a tailored list of tradespeople.

Some of our top rated extension builders in Harpenden

1705 Results

Sort by:

R Rexha Builders
Rating: 5 out of 5
Extension Builder in Harpenden
Extensions - Porches - Garages - Lofts conversion - Kitchen fitting - Bathrooms - Carpentry - Repointing - Painting -Decorating (interior / exterior)
Get in touch
Latest review:
Extensions- 21 Sep 2019
Ray has done an outstanding job with the new extension. He has shown great attention to detail and accommodated every request. The result is one that we are extremely happy with. He installed a new bathroom downstairs complete with all necessary pipework and a new utility closet with exits for the washing and dryer. Clearly Ray has a very broad set of skills, from electricity to building to carpentry, plumbing and roofing. He really was the one stop shop to make this extension a reality and has a network of people he can call onto if required. He is certainly someone that takes pride in his work and wants a job well done as evidenced by his work. I recommend Ray without a doubt and I'm sure our paths will cross again. Thank you Ray!
St albans plastering ltd
Rating: 5 out of 5
Extension Builder in Harpenden
Hello, I have over 10 years experience in building and plastering. I undertake all types of plastering, rendering and refurbishment jobs. In the last year I have done lofts conversions, garage conversions, sky lights, media walls and much more. I have a good team who are reliable and professional. Please shortlist me so that I can provide you with a free quote. I am also happy to provide you with photos of my work.
Get in touch
Latest review:
Conversions - General- 13 Dec 2018
Tony was superb. Very professional in quoting for the job, discussing different options and keeping us informed all the way through of progress and costs. The quality of the work is very high and the job was done in really good time. Highly recommended.
n-vico ltd
Rating: 4.8 out of 5
Extension Builder in Harpenden
Marius, as owner of N-Vico LTD has over 17 years experience in the construction industry starting out as a carpenter. Now we are a highly skilled team of builders that provides a complete residential refurbishment service
Get in touch
Latest review:
Extensions- 21 Jun 2017
COWBOYS! Absolute Nightmare! Marius left the job incomplete, after repeatedly demanding more money before completion! Not to be trusted! Workmanship wasn't as good as he would lead you to believe, I have pics & videos of: Cigarette butts in mortar. Bricklaying in the rain, not water-tight roof/felt work, drainage, unsafe electrical work which needs to be redone. Left my neighbour side of roof damaged + with a hole now for a month. Damaged door/table/gate. Of course, he denies any wrongdoing Please be very careful if you have to use this fraud. Get a FULLY detailed itemised quote! Draw up your own contract - do not use his. Do NOT ever pay CASH. Produce a schedule of works - pay him ONLY when the specific task is 100% complete - leaves lots of work unfinished but then lies claiming its complete at interim payments. Get a FIXED price for every aspect of work - do not have "TBC" or ambiguous costs - if he can charge more - he will. Do NOT use his electrician, cringeworthy attempt to "price up" a simple job and damaged roof. Buy ALL Materials yourself OR require receipts for anything he buys. Request ALL Invoices. Ensure he follows specs - offered me £250 off total job cost, if I used a inferior type of rooflight to the one required in spec. Ensure he doesn't keep rubbish on site, Hire a skip. Keep all communication on record, email, text, even voice record him as he is a pathological liar. Very dishonest, delusional and frankly embarrassing.
ReformWorks Design Limited
Rating: 4.8 out of 5
Extension Builder in Harpenden
ReformWorks Design Ltd We have been in the building industry for more then 25 years. we refurbish huoses and build extensions your project can be as small as a kitchen or bathroom, or as large as a complete renovation
Get in touch
Latest review:
Extensions- 19 May 2026
Very good builder, done a good job. You can 100% trust him to do the job.
GpmBrickwork ltd
Rating: 5 out of 5
Extension Builder in Harpenden
GpmBrickwork Ltd Extension garden walls all types of Brickwork Patios Chimney repairs New builds
Get in touch
Latest review:
Bricklaying- 8 May 2026
Gordon was amazing. He came within a few days on a weekend to repair the steps as they were dangerous. He did a great job, also repairing loose brickwork on a wall at no extra charge. Very reasonable price too. I can recommend him and will definitely contact him again for brickwork jobs.
Integral Innovations Ltd
Rating: 5 out of 5
Extension Builder in Harpenden
Renovations, Extensions, Conversions - with a holistic approach to building. We specialise in renovating period properties, cottages, barns and historic buildings. Offering damp and thermal consultations, we can help you to set up short term and long term building/renovation strategies for best results.
Get in touch
Latest review:
Restoration & Refurbishment- 9 Aug 2020
Fantastic work done and the working relationship was excellent. High quality standard with ‘outside the box’ suggestions which worked in our favour. Highly recommended for unique listed/old properties with techniques to ensure in keeping with the style and characteristics of the property.
Gibbons Groundworks Limited
Rating: 4.4 out of 5
Extension Builder in Harpenden
Patios Driveways Fencing Drainage Foundations All Aspects of Groundworks
Get in touch
Latest review:
Fencing- 3 Aug 2020
Price - Standard Punctuality - Excellent Materials - Basic Satisfying job, will hire again
D&N construction
Rating: 5 out of 5
Extension Builder in Harpenden
D&N CONSTRUCTION ARE A POTTERS BAR BASED BUILDING AND HOME IMPROVEMENT COMPANY WITH MANY YEARS OF PROFESSIONAL EXPERIENCE. Whether it’s improving your outdoor space, or extending your home, D&N Construction is here to help you every step of the way. We have many years of experience in renovations and all building work At D&N Construction , we’ve built our livelihoods on building peoples’ dreams across Hertfordshire. we’ve experienced it all we can help you . No job is too small or too big!
Get in touch
Latest review:
Carpentry- 8 Oct 2025
Nick fitted a single pine internal door for me in the Letchworth area. He was very easy to work with, communicated promptly and clearly throughout, and was neat and tidy during the installation. I’d happily recommend his services.
MCQ Building Services
Rating: 4.8 out of 5
Extension Builder in Harpenden
40 years experience in the building trade, Time served as a Plasterer and structural repairs, Damp Proofing, Extensions, renovations and Conversions.
Get in touch
Latest review:
Extensions- 15 Oct 2019
Excellent service,the different trades that Martin used were in my opinion the best of the lot. I would rate them all as Craftsmen and not just tradesmen. The quality of the whole job is outstanding and comments from neighbours about how good it all looks is very gratifying. I would thoroughly recommend Martin without hesitation.
Raghbir Singh
Rating: 5 out of 5
Extension Builder in Harpenden
Carpenter with 15 years of experience providing reliable, high-quality workmanship across Dunstable, Luton, Leighton Buzzard and surrounding areas. Specialising in all aspects of carpentry including first fix, second fix, doors, skirting, architraves, flooring, kitchen fitting and bespoke work. From small jobs to full renovations, all work is completed to a high standard with attention to detail. Reliable, punctual and tidy, with a focus on getting the job done properly and keeping customers satisfied.
Get in touch
Latest review:
Carpentry- 17 May 2026
Raghbir did an excellent job and completed the work on time, exactly as agreed. What stood out most was his honesty and professionalism there were no hidden charges or unexpected costs, which can often happen with some tradesmen. He also didn’t cut corners and delivered quality workmanship throughout. I would highly recommend him for any carpentry work.
A. D. Builders
Rating: 5 out of 5
Extension Builder in Harpenden
Hi , I’m Aaron Davis of AD builders, I Have been in the building trade for 20 years. Orginally worked for my father in a family run business. I take a lot of pride in my work , references are available at any time. I'm a bricklayer by trade and ground worker. I have built many extensions over the years, and enjoy it now just as much as I did when I began. My work is of a very high quality , thanks for taking the time to read through my profile.
Get in touch
Latest review:
Extensions- 23 Dec 2021
We originally asked Aaron to come look at the property before we purchased to understand the possibilities of a large extension. Since that point over a year ago Aaron has worked with us in refurbishing the existing house as well as building a large wrap around extension. The core team we had on site of Aaron, Dan, Karl are hard working, they care about what they do, and they are good fun to be around. Aaron also has a broad network across all the other trades - all of which did a great job on the project. I would certainly recommend them for any work you are considering.
KW Electrical Services
Rating: 5 out of 5
Extension Builder in Harpenden
Hi my name is Kevin and I have been an electrician since 2002. I run a small electrical business called KW Electrical. I am a Which Trusted Trader, Hertfordshire County Council Approved, Part P Registered, over 150 reviews on Checkatrade and all round nice guy. I look forward to quoting competitively on your job.
Get in touch
Latest review:
Kevin did the electrical work in my extension. He fitted new plug sockets, aerial socket and sky socket, also LED ceiling lights and outdoor PIR light. Kevin was very professional, polite and reliable. He worked efficiently and was tidy. He was also very helpful and explained things clearly to me. I have recommended Kevin to a friend and I will be using him again next year.
Charge utilities
Rating: 5 out of 5
Extension Builder in Harpenden
Experience machine Operator. Who comes with digger and sum tools breaker petrol saw cable locater. Digging foundations for buildings and drive ways and garden levelling also i can prepare for utilities such as gas water electricity and drainage etc
Get in touch
Latest review:
Groundwork & Foundations- 17 Feb 2026
Great work with. Honest and reliable.
P C Bondea Limited
Rating: 4.7 out of 5
Extension Builder in Harpenden
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.
Get in touch
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.
Dash Carpentry & Construction
Rating: 5 out of 5
Extension Builder in Harpenden
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
Get in touch
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!
Mantas Gurskas
Rating: 5 out of 5
Extension Builder in Harpenden
Little jobs and larger projects.
Get in touch
Latest review:
Demolition- 21 Apr 2021
Mantas was really helpful and hard working.A great job,thankyou.