Endorsed by Which?

Harp Windows (Watford) Ltd


62 Reviews

Opening Hours
Today - 09:30–17:00
  • 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

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62 reviews
Customer Service
Sort by
New side door and window
Customer Service
All done on time in accordance with the quote. They cut down a window opening to put in an aluminium door with tall window beside, and removed the rubble etc. leaving some good re-usable spare bricks. Not too much dust etc. left, and everything ready for final finishing and decorating which I've done. Looks good, works well, wife and daughter happy! And, I think, a fair price. A straightforward no-nonsense local company I'm happy to recommend. Competent, friendly, and helpful.
Tim in Hertfordshire Posted on 04/04/2023 , work completed 03/03/2023
New windows and French doors
Customer Service
The Company was very professional from the showroom to completion of the job. The fitters were extremely courteous and carried out all works in a professional manner and left everything clean and tidy on completion. I would highly recommend Harp Windows.
Customer in Hertfordshire Posted on 02/04/2023 , work completed 06/03/2023
efficient process with excellent workmanship
Customer Service
The whole process was friendly and stress-free. The installation was done quickly and to a very high standard. I would use Harp again and thoroughly recommend them.
Customer in Hertfordshire Posted on 30/03/2023 , work completed 24/03/2023
Great work , great price , great service! Thanks
The team from Harp did a great job . From providing all the info needed to comply with the landlord’s licensing requirements to installation . The windows look lovely and the guys did an amazing job with so little mess. Very pleased indeed . Given the windows industry suffers a bit in terms of reputation , it’s been a pleasure lovely to deal with knowledgeable, good people before and during the installation . Thank you - we are really pleased and wouldn’t hesitate to recommend .
Customer in Essex Posted on 24/11/2021 (Reviewer did not use service)
Outstanding service
Customer Service
The service from start to finish was impeccable. This included first contact, measuring service, install and final payment. An incredibly professional company and kept high standards throughout. Special mention must go to the window fitters who arrived on time, were extremely polite, worked quickly and efficiently and left it absolutely spotless. A minor error in communication along the line was that we added on two window boards which the fitters were unaware of. However they made a trip back to collect them and fit them on the final day. I would highly recommend Harp windows to friends and family.
Customer in Hertfordshire Posted on 16/11/2021 , work completed 16/11/2021
Great work - very reliable
Customer Service
What fantastic service I have received from the start of engaging with Harp until completion of the job. Everyone was an absolute pleasure to deal with and the windows look great - the left so little to sort out and cleaned up so nicely. I would highly recommend Harp to anyone!
Alex in Hertfordshire Posted on 15/10/2021 , work completed 14/10/2021
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