Endorsed by Which?

ZEN Windows & Conservatories

5.0

42 Reviews

Opening Hours
Today - 09:00–17:00
  • Monday 09:00–17:00
  • Tuesday 09:00–17:00
  • Wednesday 09:00–17:00
  • Thursday 09:00–17:00
  • Friday 09:00–17:00
  • Saturday 09:00–17:00
  • Sunday 10:00–15:00

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About

We specialise in replacement windows, doors and conservatories. All of our windows are A-rated as standard and our products covered by solid guarantees which are insurance backed. We are Certass registered and approved to carry out installations in accordance with current building regulations. We supply the superb Duraflex Diamond Suite PVCU system, and specify Ultraframe for all of our conservatory roofs; both of which are second to none in terms of quality and durability.

What we do

  • Double glazing

    • Double glazing installation
    • Double glazing suppliers
    • Double glazing repairs
  • Conservatories

  • Glaziers

    • Replacement window services and repairs
    • Window consultants
    • Double glazed units
    • Double glazing installation
    • Double glazing repair
    • Sash windows
    • UPVC Windows
  • More Services

    • window installation
    • window installers
    • window company

Customer reviews

Why you can trust these reviews

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100% of the reviews we publish have been through our stringent moderation process.

5.0
42 reviews
Customer Service
5.0
Quality
5.0
Value
5.0
Sort by
Exceptional service
Customer Service
Quality
Value
A friend highly recommended Zen, and we’re extremely pleased we chose them to install our new windows and doors. From start to finish, the process was great. During the installation, we raised a couple of concerns because a few things didn’t look quite as we expected, but after discussing them with the installers, the changes were made promptly and everything still finished on time. Big shout-out to Matt in the office and our installers, Steve and Jamie - you guys were great!
Customer in South Gloucestershire Posted on 14/11/2025 , work completed 17/10/2025
Excellent service from start to finish
Customer Service
Quality
Value
We are extremely happy with Zen windows this is the second lot of window we have had installed by this company, from our first contact with Matt for our quote, Jeff who booked the installation and Andy and Archie who fitted the windows they explained everything that need doing and cleared up afterwards. Excellent work and the windows look amazing
Customer in Bristol City Posted on 09/11/2025 , work completed 06/11/2025
High Quality, Clean, and Efficient
Customer Service
Quality
Value
Had new french doors fitted. The communication was excellent from the outset, and the work completed was to a very high standard. The fitters were also very clean, and left no mess behind at all. A great service overall, and would recommend.
Customer in Bristol City Posted on 01/11/2025 , work completed 30/10/2025
Good experience with Zen
Customer Service
Quality
Value
Zen replaced all my windows with new PVC ones. It was a good experience from initial contact through to the quote and actual work. I changed my mind on a couple of things and it was all fine. Information was clear and Zen were flexible and good at communication throughout. Work was done considerately and on time. I’m very happy with the new windows!
Customer in Bristol City Posted on 01/11/2025 , work completed 29/10/2025
Quality work & outstanding craftsmanship
Customer Service
Quality
Value
Zen Windows & Conservatories replaced a wooden-framed conservatory, sash bay windows and front door. The entire experience, from start to finish, was exemplary, from Ben visiting the house to explain Zen's products and process and provide a quote, right through to the installation team. Our conservatory is a non-standard shape, and I gather it was quite a challenge to fit. However, Andy & Archie did a beautiful job of installing the new one, going above & beyond to ensure everything was done properly, finishing it off to a very high standard. We had a Warmer Roof installation, which is already significantly better than the old plastic roof. The plasterer & electrician were also both great. Everyone involved was respectful of our home and left it tidy each day throughout the works. The finished conservatory looks amazing and more like an extension. We could not be more pleased with it. We also had replacement sash bay windows. Again, this wasn't a straightforward job, with not a single straight wall in the house. However, Andy & Archie did a lovely job. Finally, the front door was replaced with a stunning composite door. It all looks absolutely fantastic and is finished off beautifully, both internally and externally. We've had so many comments about how lovely the house looks! Overall, the project was a great experience, and I wholeheartedly recommend this company. They were so good that I've just had Ben back to quote for replacing our remaining sash windows!
Customer in Bristol City Posted on 03/10/2025 , work completed 05/09/2025
Replacement Bathroom Window
Customer Service
Quality
Value
Zen Windows replaced a window in our bathroom. From the first visit for a quotation to the final completion of the work everyone we dealt with was professional, helpful and a pleasure to deal with. Stacey, in the office called to keep us up to date with progress and called after completion to check that we were happy with the results. The quality of the window is excellent. This is the fourth time we have had work done by Zen and I would highly recommend them.
Customer in Bristol City Posted on 24/08/2025 , work completed 08/08/2025
Excellent work
Can not fault this company quick efficient service all staff polite good work done quickly and site left tidy would highly recommend will go back when we need more windows etc fitted
Customer in Bristol City Posted on 08/08/2025 (Reviewer did not use service)
Outstanding Service and Craftsmanship from Zen Windows – Highly Recommended
Customer Service
Quality
Value
We used Zen Windows in Bristol to replace our old, broken wooden sash windows and had a brilliant experience from start to finish. Ben, the General Manager, was excellent – clear, helpful, and never pushy. He priced the job fairly and explained everything in a professional and approachable way, giving us total confidence in the service. Matt, who handled the scheduling, was also fantastic – always quick to respond, clear in his communication, and helpful throughout. The whole process felt smooth and well-managed. The fitters – Mitch, Dan, and Kieran – were outstanding. They were polite, friendly, tidy, and extremely skilled. The job involved fitting a large number of sash windows, many of them irregular and tricky to install, but the team worked with great care and precision. The finishing was just as impressive – from the bath stone patching to the interior carpentry, including window surrounds and architraves, everything was done to a very high standard. Their attention to detail and pride in their work really showed. We’re absolutely thrilled with the end result – the windows look fantastic and have transformed our home. Zen Windows were a pleasure to deal with at every stage, and we would highly recommend them to anyone looking for quality windows and outstanding service.
Customer in Bristol City Posted on 05/08/2025 , work completed 31/05/2025
Sturdy, elegant, well fitted windows
Customer Service
Quality
Value
Zen had previously installed a conservatory for us, with good aftercare. This time, they installed six windows (including two bay windows), with acoustic glass. They were incredibly helpful in arranging an advanced date that fitted in with our complicated family arrangements and completed the work quickly. The guys were prompt, very helpful, hard working, tidy, and clean. They carefully discussed the work with me as they went along and were willing to make some adjustments to the way they were fitted. This resulted in me being delighted with the appearance of the windows, the way they were installed and their acoustic quality.
Customer in Bristol City Posted on 11/07/2025 , work completed 10/07/2025
Zen Windows - top service for fitting new windows
Customer Service
Quality
Value
I had high hopes of Zen Window, an established and local family run business, having been recommended them by a friend. But they more than exceeded my expectations. The helpful, professional and personal service was exceptional from the first point of contact until the completion of the installation of 4 high spec quality windows in two rooms. The fitters were diligent throughout the two days it took to complete the job, and left the window surrounds in a spotless condition with no need for any reparation work. In addition they arranged the installation and, with no delays, the removal of the scaffolding. Massive thanks from a delighted customer!
Customer in Bristol City Posted on 28/05/2025 , work completed 07/03/2025
Conservatory and windows
Customer Service
Quality
Value
This is the second time we have engaged Zen to undertake work for us, again they were very professional throughout the entire process. This time Zen replaced the house guttering, facia boards and soffits front and back and four rear windows, conservatory windows, doors and roof. The build was finished in good time and to the highest standards. Andy and Archie were on site for nearly four weeks and were unfailingly courteous, helpful and their workmanship was first class. We are really pleased with the results and highly recommend Zen Windows.
Customer in South Gloucestershire Posted on 10/05/2025 , work completed 09/05/2025
An excellent installation
Customer Service
Quality
Value
We asked Zen Windows to quote for replacement double glazed windows mainly due to the many good reviews we read here and our own experience reflected this. The quotation process was straightforward, the format of each window finely detailed and the contract clearly laid out. Our nitpicky queries were patiently dealt with. From the quotation visit to completion of the work, everyone arrived when they said they would, with regular updates on progress. We are very pleased with the quality of the installation and the windows themselves and the house was always left clean and tidy. Zen don’t have a showroom so we were very dependent on the information they provided verbally and online which isn’t something I would choose to do, I didn’t ask if there were any opportunities to view their work. My only concern related to making payment. Zen prefer payment by bank transfer and although payment can be made by credit card, payment of anything other than the deposit incurs a charge (clearly shown in the contact). I would prefer a more secure way to make the final payment
Customer in South Gloucestershire Posted on 28/08/2024 , work completed 16/08/2024
Great installation, even better support
Customer Service
Quality
Value
Zen fitted our windows in February 2021, they were great. Polite, professional and had great communication from start to finish. The price was very competitive for good quality. They arrived when they said they would and completed on time, leaving the place tidy when finished. But the real plus was in the support after the installation. We only had a small issue with one of the windows not opening. But when the manufacturer was going to make us wait for 5 weeks for the repair, Paul came quickly and was able to identify and sort the issue within 1 hour. I highly recommend Zen windows, they are very easy to work with and, as I have found, very reliable and trustworthy.
Customer in Bristol City Posted on 10/08/2022 , work completed 01/03/2021
Replacement of french door window pane
Customer Service
Quality
Value
Paul did a fantastic job replacing the broken window. He replied promptly to the quote request and came out to look over what needed to be done prior to doing the work. The new window looks great and Paul took away all the waste material and left the area of work very clean.
Customer in South Gloucestershire Posted on 28/03/2021 , work completed 06/02/2021
Replacement windows and doors
Customer Service
Quality
Value
Replaced all windows and a french door. Zen fitted in the job early to enable me to have other booked work carried out. Paul (owner) kept in regular communication and was always extremely polite and helpful. The fitters arrived on time and were friendly, very helpful and courteous. Nothing was too much trouble and they helped replace curtains, blinds etc. I would highly recommend Zen. They’re lovely to deal with.
Customer in City of Bristol Posted on 14/03/2020 , work completed 07/03/2020
New windows and doors
Customer Service
Quality
Value
Paul and the team at Zen windows did a great good. We are very pleased with the windows / doors and the fitting. Great communication with Paul and tidy working which is always pleasure. The window and door quality they fit is excellent and I would not hesitate to recommend them. A good small business which take pride in their work and customers. Thanks for a great job.
Steve, Bath and North East Somerset Posted on 01/08/2019 , work completed 31/07/2019
First rate
Customer Service
Quality
Value
Five windows of different shapes and sizes fitted to 1930's semi. Great people, great job. Highly recommended.
John, Avon Posted on 03/10/2018 , work completed 03/10/2018
Excellent job
Customer Service
Quality
Value
Paul did an excellent job! He came out to quote quickly the price was extremely competitive. The lead time was short in my case. Zen fitted my windows beautifully and very fast. They also left my house very clean and tidy. Very highly recommended!
Samantha, Avon Posted on 01/06/2018 , work completed 01/06/2018
Superbly professional
Customer Service
Quality
Value
From my first phone call to the company they have been efficient and effective. They arrived on time, worked diligently and got the job done, not finishing until everything was complete and the area completely cleaned up and tidied away.
Susan, Avon Posted on 25/05/2018 , work completed 25/05/2018
Fantastic Service
Customer Service
Quality
Value
Paul kept in touch with me RE prices & the order. He turned up when he said he would. He replaced misted up windows/door & then completed 5 other little jobs that I either asked him about or he saw. e.g. sorted a sticky handle, sealed a leaking gutter. He was polite, friendly & respectful. I recommend him 100% Thank you Paul!
Elaine, Avon Posted on 14/05/2018 , work completed 14/05/2018
First rate work - Quick and very Efficient
Customer Service
Quality
Value
I had 5 double glazed windows installed. Paul visited my house and did a quick survey for the quote. During the visit he answered all my questions and advised where necessary, at no stage did he try to "sell" anything, he just measured, advised and left, it was all done in about 30 minutes. His quote was roughly in line with 2 previous quotes I had received so the only decision I needed to make was which one? Paul won the contract for the following reasons: 1. As described in the first paragraph 2. Paul came across as a very personable person, easy to talk to, very polite and not all "pushy". All the work was done very efficiently and completed in two days. While he was in my home he was polite, quiet and just got on with the job in a very professional manner. The work was done to a very high standard and the work area was always cleaned up after each stage. I am very pleased with my new windows and as a result I have invited him back price up replacement French doors and a back door. I can happily recommend Zen windows and I feel confident you will be pleased with any work they do.
Jacqueline Anderson Posted on 06/05/2018 , work completed 06/05/2018
Highly Recommend - Great Job
Customer Service
Quality
Value
Great customer service from enquiry to completion. Paul, our contact, has been extremely helpful and accommodating and our appointments have been easy to make and have been fitted in around our lifestyle. The installers, Tim & Mark, were friendly and professional. They cleaned up after their work well and were hard working & trustworthy. Would definitely recommend ZEN to anyone looking for new windows!
Jo, Avon Posted on 23/03/2018 , work completed 23/03/2018
Excellent Service
Customer Service
Quality
Value
From the first contact until completion Paul could not have been more helpful. The work was completed on time (fitting it into my schedule of availability!) to an excellent standard and was very good value. At the end, apart from a lovely new back door, you would not have known he'd been there. I cannot speak highly enough!
Duncan, Hampshire Posted on 16/03/2018 , work completed 16/03/2018
Happy customer
Customer Service
Quality
Value
Zen have fitted a new porch for me. They were cheaper, quicker and more friendly than the other 2 companies that quoted. We are really pleased with the service and product!
Which? Trusted Traders Consumer Posted on 16/03/2018 , work completed 16/03/2018
Perfect
Customer Service
Quality
Value
Excellent customer service from start to finish. I've never known such clean and tidy workman, really impressed with the finished product. Paul was very flexibly and managed to work a tight deadline. Would definitely recommend them and use them again.
Sazzerlou Posted on 09/03/2018 , work completed 09/03/2018