Extension Builders in Harefield | MyBuilder

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

Some of our top rated extension builders in Harefield

2493 Results

Sort by:

DRJ Homeimprovements
Sponsored
Rating: 4.9 out of 5
Extension Builder in Harefield
DRJ Home Improvements Ltd provides reliable and trustworthy service completed to a high level of standards because I believe you don't need to move, Just improve. I have got 20 years experience in the building trade satisfying clients. We are a team that will get your job done from start to completion.
Get in touch
Latest review:
Extensions- 17 Mar 2026
I would not use Dan again. Complete lack of expertise on certain aspects of this build resulting in a lot of stress for me. Failure to gain necessary permissions despite Dan's reassurances at the time. An error on Dan's part related in the entrance to my property having to become much smaller than I needed. Disappointed overall.
CTS Solutions Ltd
Rating: 5 out of 5
Extension Builder in Harefield
A specialist loft conversion company that has been in business for 20 years, however, we have since branched out to all types of projects (extensions, refurbs, garage conversions etc). We can prepare and submit drawings on your behalf, for Planning Permission and Building Regulation Approval. Also, we can carry out the structural design, meaning you don't need to employ an architect! However, if you have drawings done already, we are happy to price your project and build from these.
Get in touch
Latest review:
Asset Lofts came to our rescue when another company had let us down. They were professional and genuinely supportive right from the outset. The loft conversion (inc. full chimney removal) and patio works were completed in 5 weeks and this in our eyes was a building miracle. The workmanship and finish is of the highest standard. They hold accreditation with many of the industries leading bodies and that sets them apart from others. We highly recommend them.
Zenstruction
Rating: 5 out of 5
Extension Builder in Harefield
Established in 2005, we are a trusted building company with extensive experience in all aspects of construction, from new builds to fascia and gutter installations. Known for delivering high-quality projects on time and within budget, we maintain the highest standards of workmanship, safety, and reliability. Our expertise spans a wide range of services, ensuring that each project is completed to exceptional standards, meeting both client expectations and industry regulations.
Get in touch
Latest review:
Extensions- 3 Sep 2018
Zen has helped transform our home, we’ve drawn a lot of confidence from his considered approach and thorough work ethic. He’s so far addressed the cause of cracks to exterior walls of our property and has provided lasting solutions. We also asked him to plaster our hallway and update the banisters for us, Zen has done a great job of reinforcing the strength of the original features whilst retaining the property’s character. Very good with pets too. Looking forward to the next project.
Hancock Developments ltd
Rating: 5 out of 5
Extension Builder in Harefield
Builders with over 20 years experience in Building and Groundworks. No job too big or too small. From concept to complete build. Groundworks, Brickwork, Carpentry, Plumbing, Landscaping, Driveways,Patios,Demolitions, Extentions, Interiors, Loft Extensions/Conversions, Clearance, Electrics, Roofing
Get in touch
Latest review:
Carpentry- 13 Oct 2019
Jake and his brother Robbie are both friendly trustworthy individuals. They completed my loft conversion swiftly and both demonstrated they know what they are doing. Have had them back for other work since and would use again.
SJC Construction & Interiors
Rating: 5 out of 5
Extension Builder in Harefield
SJC Construction & Interiors, Is a family ran construction company based in Rickmansworth, Herefordshire. we pride ourselves on top quality work , completed by our expert tradesman, to specification and on budget time and time again.
Get in touch
Latest review:
Extensions- 22 Dec 2021
We could not be happy with the work that has been done by SJC Construction. They have gone above and beyond and very true to their word! The work was completed to a high standard in exactly the quoted time frame, exactly to the quoted price! They have made the whole process stress free and genuinely are a lovely group of guys, polite and efficient! Will be continuing to use them now for the rest of our work on our property and would be our first choice if in the future any more building work/ renovations need to be done :)
MNR
Rating: 5 out of 5
Extension Builder in Harefield
House renovator
Get in touch
Latest review:
Handyman- 22 May 2026
I recently had building work completed by Marcus Rus and was very pleased with the overall standard of workmanship and professionalism shown throughout the project.The work was completed efficiently, communication was good, and any issues that arose were treated promptly. I found Marcus to be polite, hardworking, and kept my property tidy at all times. I would happily recommend him to anyone looking for reliable building services and would use him again in the future.
RSJ.BUILDERS
Rating: 4.3 out of 5
Extension Builder in Harefield
I AM FIFTY OD YEARS OLD LIVE IN NORTHWOOD.AND AM WILLING.TO TAKE ON ANY JOB TO SMALL .OR BIG
Get in touch
Latest review:
Extensions- 23 Aug 2019
Very knowledgeable and many thanks for your time.
McMahon Brickwork
Rating: 5 out of 5
Extension Builder in Harefield
I specialise in extensions, new builds, front garden walls, patios, Block paving heritage work and any Brickwork repairs. I can Guarantee very high standards of work.
Get in touch
Latest review:
Bricklaying- 18 Jan 2026
Luke was very flexible with planning and did a nice job rebuilding the wall with the existing bricks
Simon Dunn Groundworks
Rating: 5 out of 5
Extension Builder in Harefield
We are a groundworks company with over 30 experience in all aspects of the building industry. We do foundations, drainage, soak aways, rainwater harvesters, concrete bases, brickwork and paving. We have all our own plant supplying diggers with drivers.
Get in touch
Latest review:
Groundwork & Foundations- 18 Feb 2016
Quick quote, friendly guy. Ended up choosing someone to do the whole build instead.
Robert Bielat
Rating: 5 out of 5
Extension Builder in Harefield
I am a 44 year old qualified plumber and Gas Safety engineer. I have 14 years of experience in the UK alone. I will offer appropriate advice before undertaking any work, and I always stay as long as it takes for the job to be done properly. I am also happy to work as part of a team if needed.
Get in touch
Latest review:
Central Heating- 23 May 2016
I hired Robert to remove a radiator and do a boiler service. Rob did a good job and was punctual. He also took the time to explain what he was doing and why he was doing it. I would hire him again.
Pithadiya Construction
Rating: 5 out of 5
Extension Builder in Harefield
We are new to MyBuilder but not new to building! We have over 12 years’ experience in the trade. Specializing in New Builds, Extensions, Loft conversion, Complete renovation and we are a professional, caring, and high quality building services. We are based in Hounslow, and we cover West London, North West London, South West London and all surrounding
Get in touch
Latest review:
Extensions- 17 Jun 2022
I have my rear house extension completed and a brand new kitchen installed by this firm. The project went brilliantly from start to finish despite the bad weather. The workers always turn up on time, rain or shine. Mr Ram and his team were pleasant to work with and they were always willing to listen to suggestions for improvement. They have eye for details making sure the works are completed to the highest standard without compromising the budget. I am pleased with the work and would highly recommend this firm unreservedly.
Florin
Rating: 5 out of 5
Extension Builder in Harefield
I am passionate about my work.Because I love what I do, I have a steady source of motivation that drives me to do my best.
Get in touch
Latest review:
Carpentry- 27 Jul 2025
Florin was great, he arrived promptly and got to work straight away. We had a really tricky door to fit to a wonky frame. Rather than trimming the door (which was pre finished in a semi gloss paint), he painstakingly chiselled back the frame to make it fit. Other people wouldn’t have done that and the finish would have been terrible if the door was trimmed. Well done Florin! He also fitted a recessed handle and lock system for a pocket door. We’ve already hired him again for some more work.
PROPERTY REFURBISHMENT LONDON LIMITED
Rating: 5 out of 5
Extension Builder in Harefield
We are a construction company based in London and operating within the M25 area. We were proudly established in 2014, specializing in the refurbishment of residential properties. We offer a comprehensive range of services tailored to meet the unique needs of each client. Whether it's updating a bathroom, refreshing interior walls, restoring original features, or undertaking major home renovations, extensions, or loft conversions — our team is dedicated to enhancing and improving existing homes with care, quality, and attention to details. We are qualified members of: Constructionline, CHAS, Considerate Construction, TrustMark, FMB, Gas Safe. Fully insured up to 10,000.000 Cover and All work is guaranteed.
Get in touch
Latest review:
First floor extension and refurbishment of Victorian house: The standard of work provided by Adrian, Julian and the team was excellent. They always arrived around 8 am every day and worked tirelessly on site. Despite various supply delays, they worked extremely efficiently and their attention to detail and use of quality products were evident in all of their work. They are excellent communicators and kept us informed with progress every step of the way. Adrian was a great site manager and great at liaising with building controls and structural engineers too.
Moraru building
Rating: 5 out of 5
Extension Builder in Harefield
Hi,my name is Ionut, I m Romanian man and general builder I can do lot of jobs . I m profesional,prompted and quality jobs. Free quote for all the possible customers.
Get in touch
Latest review:
Roofing (Flat)- 13 May 2026
Was punctual, explained everything clearly and was reasonable on price. Will use again, Thanks!
M j design and building ltd
Rating: 5 out of 5
Extension Builder in Harefield
Construction.
Get in touch
Latest review:
Extensions- 25 Jul 2020
Fantastic team, they took the idea I wanted and exceeded my expectations, fantastic job and fantastic team. I would highly recommend them to anybody.
Upgrade Interiors Ltd
Rating: 5 out of 5
Extension Builder in Harefield
We’ve focused in the last 26 years, on improving our skills and how can we be better professionals. It has been a long journey, a time in which we have developed every day as professionals, to put everything in value, for the clients we have today. We believe that, when you do everything with great passion, the results will be fantastic and you can be proud of the final result.
Get in touch
Latest review:
Carpentry- 17 Oct 2025
Nico did a fantastic job. The new wardrobe doors look amazing and fit perfectly after adjusting to fit the older door frames which had settled and moved slightly out of alignment over the years. Better than the original ones. The bedroom doors were replaced and fitted to open to the correct side of the rooms. The broken stair was expertly cut and fitted and matched perfectly to the rest of the stariway. Very solid and completely squeek free. Built to last a very long time. Nico is very reliable, dependable and highly skilled. I highly recommend him for any carpentry work needed.
Hills builders
Rating: 5 out of 5
Extension Builder in Harefield
Hi I'm Lee a general builder with 25+ years experience, specialising in: * Landscaping * Groundwork’s * Brickwork * Roofing * Carpentry * Extensions/ Refurbishments * Emergency call outs I pride myself on being being highly knowledgeable and reliable, focusing on clear communication from the start to enable projects to be completed exactly what is envisioned by you, on time and within budget. Get in touch for a free no- obligation quote Regards Hill's builders
Get in touch
Latest review:
This lovely gentleman that carried out my works carried out exactly what I envisaged he was extremely polite tidy & professional I was so happy with the finished work Quite refreshing to have found this young man