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Endorsed by Which? Trusted Traders

Harp Windows (Watford) Ltd

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57 Reviews

Opening Hours
Today - 09:30–16:30
  • Monday 09:30–17:00
  • Tuesday 09:30–17:00
  • Wednesday 09:30–17:00
  • Thursday 09:30–17:00
  • Friday 09:30–16:30
  • Saturday 10:00–14:30
  • Sunday - Closed

What is a Which? Trusted Traders Hertfordshire Trading Standards Approved Endorsement?

Which? Trusted Traders has partnered with Hertfordshire Trading Standards to create a Hertfordshire Trading Standards Approved endorsement. In addition to our standard trading standards assessment, this trader has had a DBS check and is subject to a Trading Standards intelligence check


Established in 1989, Harp Windows (Watford) Ltd is a family run company manufacturing and installing high quality replacement windows, doors and conservatories. Over the years, we've worked hard to build a reputation for professional integrity, efficient customer service, high quality products and value for money. Customer satisfaction is paramount to us, we do everything possible to ensure our customers are delighted with their new windows, doors or conservatory. For further peace of mind our customers are always welcome to visit us at our St Albans Rd showroom, or our factory in Watford, where we manufacture many of our products. There are many good reasons to choose us as your installer, including:

* Long established and local,
* Members of FENSA, The CPA and Checkatrade,
* Hertfordshire Trading Standards Approved,
* Our products are fully guaranteed for ten years,
* We offer guarantee protection insurance backed warranties,
* Comprehensive aftersales service for complete peace of mind.

What we do

  • Conservatories

    • Conservatory maintenance
    • Conservatory glass heat reduction film
    • Conservatory repairs
    • Hardwood conservatories and orangeries
  • Doors

    • Bi-fold doors
    • Patio doors
    • Fire doors
    • French doors
    • Orangeries
    • Composite doors
    • UPVC doors
    • Front door
  • Double glazing

    • Double glazing installation
    • Double glazing suppliers
    • Double glazing repairs
  • Glaziers

    • Aluminium Windows
    • Sash windows
    • UPVC Windows
  • More Services

    • window installations
    • upvc sash evolution timber replacement

Customer reviews

Why you can trust these reviews

All reviews are verified as being genuine and a true customer of this trader.

How can we be so sure?

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

57 reviews
Customer Service
Sort by
Professional service
Customer Service
Harp windows replaced all our windows and doors and were very helpful from the start. We are very pleased with the service and get people knocking on our door all time asking who fitted our windows and front door.
Ed in Greater London Posted on 19/07/2021 , work completed 26/03/2021
The trader replied (on 28/07/2021)
Thank you for taking the time to leave your feedback Ed. We really appreciate it! We are delighted you are so happy with our products and service and if we can be of any further assistance to you please don't hesitate to get back to us at any time. Thank you for choosing Harp Windows! :-)
Bi-Fold doors - purchase & installation
Customer Service
I wanted to get Bi-Flold doors fitted and am so glad I used Harp Windows for this service. I was made to feel comfortable in the show room and was given clear explanations regarding my options - there was no pressure of influence given with my order. Harp Windows visited my house in conjunction with the builder carrying out the work to ensure all requirements were in place and understood so no issues would arise with the door opening and fitment. I was given clear timescales for ordering so knew what to expect and when which were met. The fitting team arrived with the door and were polite. They worked quickly, were clean and the overall result was excellent - the doors fit perfectly and they operate just as expected. I am really happy with the overall look and quality of the door.
Customer in Hertfordshire Posted on 09/07/2021 , work completed 22/06/2021
Great Service & Highly recommend the company
Customer Service
Great Service and High Quality Bi Fold Doors Fitted. Harp Windows provided an excellent service from start to finish and we are very happy with the end result. Our new Bi-Fold doors were fitted on time by friendly, professional staff. We are very happy with both the fitting and the quality of our new the doors and will def. use Harp Windows for any future work.
Sam in Greater London Posted on 09/07/2021 , work completed 25/06/2021
The trader replied (on 10/07/2021)
Thank you for taking the time to leave your feedback, we really appreciate it! We are delighted you are so happy with our products and service and if we can be of any further assistance to you please don't hesitate to get back to us at any time. Thank you for choosing Harp Windows! :-)
Complete House Double Glazing Windows + Bi-fold Doors
Customer Service
I had redone my house in 2016 with extension and Harp Windows have installed double glazed windows throughout the house together with Bi-fold doors for the living room. I do not recall if I left a review back then but the reason to do now are as follows: 1. All suppliers promise the earth n the stars when taking an order but lack afterwards in after-sales service. It has been now more than 3 years and on 2 occasions Harp representative have come to attend even a small problem without any hesitation and without any reminders. Gary has been the man behind it and would recommend him highly. 2. Unlike other Double Glazing Companies Harp never pushed for an order. They were straight forward and upright and defined clearly what they can do and what they can't. I personally like this approach and was very happy with the final result. 3. My experience with them is such that I would recommend them very highly without any drawbacks.
Customer in Greater London Posted on 01/02/2021 , work completed 15/11/2016
Outstanding service
Customer Service
Harp windows fitted new windows, front door & a porch on my parents house. All work was carried out to a high standard. They arrived on time & were courteous & professional. They advised of progress & went over & above to ensure there was minimal disruption. All areas were kept clean & tidy. They were truly outstanding. My parents are extremely happy with their new fittings & would definitely use Harp Windows again. We highly recommend & thank them very much.
Customer in Greater London Posted on 21/12/2020 , work completed 09/11/2020
Courteous, efficient and tidy
Customer Service
Replaced 4 windows and fitted a new door to the rear of the garage. This was the second time I have used Harp. The first time they supplied a patio door and widow to a new rear extension. The work was done to the agreed budget but was delayed by the Corona virus lockdown. A revised date was agreed and kept to. The fitters were very courteous, considerate (keeping a social distance) and very clean. At the end of the job you could not tell that they had been, everything cleaned up neat and tidy. Very satisfied with product quality based on my previous experience. I would definitely recommend this company.
Customer in Hertfordshire Posted on 30/06/2020 , work completed 03/06/2020
Excellent Company and customer ethos
Customer Service
My wife and I used Harp windows to replace the windows in our house some years ago. They delivered on time and on budget exactly as quoted with a lovely team of people. The product (aluminium internally glazed) has held up really well over the last few years and when we extended we used them again. They matched the windows and installed in the same way, on time and budget while sourcing bifold doors for us as well. The team responded to our queries in a very fast and efficient way revising any quotes quickly for us to evaluate and ensuring we had the correct window layouts (bars and leading etc...) The new windows are of the same high quality as was the installation team. We have used a lot of contractors as part of the extension and had our original builder go bust. In an industry with many variables HARP and its team (particularly Gary Hays) are outstanding and we would not hesitate to recommend them.
Andrew & Kath Posted on 18/03/2020 , work completed 16/01/2020
Two back doors: kitchen and garage
Customer Service
Harp Windows fitted two back doors, to replace old wooden, half glazed units. It was a pleasure to do business with them throughout. The installation team excelled themselves to be helpful.
Customer in Hertfordshire Posted on 11/02/2020 , work completed 11/02/2020
New door fitted
Customer Service
Used Harp windows previously to replace double glazed window. This time we was looking for replacement front door. As always staff very friendly, helpful, informative, professional. Always happy to respond to any issues that arise and when they make an appointment to visit always on time, pleasant & can sort any problem out. Highly recommend them.
Customer in Greater London Posted on 22/01/2020 , work completed 09/12/2019
Excellent Windows & Service
Customer Service
We set out to have our ancient double glazed units replaced with some trepidation as we are in an older property. We needn't have worried, the service and more importantly, the fitting, was excellent. Our fitter didn't stop from the moment he arrived, he took a real care in making sure the finish was just right and we were also pleased that Harp had recognised on their survey that our old windows were substantially out of fit, hence the reason it was so draughty! We have no hesitation in recommending them, they were to budget and accommodated the date we wanted them to be fitted. Many thanks!
Customer in Greater London Posted on 03/11/2019 , work completed 07/10/2019