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Harp Windows (Watford) Ltd Transform your living space with our market leading bifold doors and open up a multitude of possibilities in your home. A modern take on the traditional sliding patio door with the perfect blend of aesthetics and functionality. High specification composite, uPVC, timber alternative and aluminium front doors that will complement any home. Featuring timber-look mechanical joints with traditional internal timber aesthetics and deep wood-like cills, our Evolution windows look just like wood.

Virtually indistinguishable from timber, our sash collection offers many advantages including increased thermal and acoustic performance, ease of operation, and low maintenance.
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Our commitment to our customers does not simply end once your installation is complete. We provide a comprehensive aftersales service which provides total peace of mind for all our customers. In the unlikely event that any problem should arise after your installation, then we are fully committed to rectifying it, and at a time that's convenient to you.
We offer our customers an advanced range of internally beaded double glazed windows incorporating a wide range of styles, designs and options from modern to traditional - and all with the same high specification as standard. A selection of colours and woodgrain effect finishes are available across all of our window ranges and we only install quality products from trusted names such as Rehau and Kommerling uPVC casement windows, Ultimate Rose and EcoSliders box sash windows, Evolution Storm and Flush timber replacement windows, Aluk and Origin aluminium windows, and Bereco timber windows.
Combines traditional design, advanced manufacturing and versatile premium grade aluminium. By combining the finest grade aluminium with precision engineering and exceptional craftsmanship, Origin Global has a proven track record in delivering high quality, functional yet sophisticated products that are built to last.
Our range of doors is unsurpassed and we believe we offer the very best in design and manufacturing excellence. By using the latest modern materials, our long lasting highly durable doors need very little maintenance, boast excellent thermal and soundproofing properties and extremely efficient security features.
Reviews (14)
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Reg Lopez
Dec 02, 2021
The team from Harp did a great job with our windows. 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 to deal with knowledgeable, good people before and during the installation. Thank you - we are really pleased and wouldn't hesitate to recommend.
Alex Jones
Oct 16, 2021
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!
Terry Jones
Jul 23, 2021
Fantastic job, v professional results. And it was the cheapest quote too. The guys took pride in their work & seemed to enjoy it. Replaced all our windows & a door & it looks great. Wish they'd worn ear defenders to protect themselves though! Not enough people look after themselves on the job.
David Elliott
Sep 13, 2020
Just to thank John & his colleague from Harp Windows Watford who responded today to a team member's emergency when a door would not lock. Visited very quickly & sorted out the problem with expertise & good humour on a very hot day Harp Windows Highly recommended
Jimviv
Dec 24, 2019
Just had two bay windows renewed. Excellent work by careful and thoughtful installers, and reasonable prices. Highly recommended.
F. Sh
Nov 30, 2018
Fantastic service and price. Reliable, clean and tidy install. Highly recommend, I wouldn't use anyone else.
Nicola Rogers
Nov 03, 2018
Very professional service - My mum loves her new windows. Staff friendly and courteous at all times - Would definately recommend.
John Williams
Jul 30, 2018
Outstanding company from the start, the quality of the windows and service I received was brilliant, communication from the installations manager kept me informed all the way through the process, fitters were polite and courteous and very clean and tidy. I would highly recommend harp windows to all my family and friends
Jeff Dalton
Jul 16, 2018
Very reliable professional company really pleased with my new conservatory
Andrew Dalgliesh
Jun 11, 2018
Quite simply excellent. Harp made the whole process of putting in our sash windows so simple and the product we have had installed looks amazing. The job was not the most straight forward however the installation team took everything in their stride. Could not be happier to be honest.
Magenta Flag
Mar 22, 2018
Harp Windows have installed replacement windows and doors in three consecutive properties and I can honestly say that each time they have done an excellent job (which is why I keep using them every time I move!). They explained the process to me clearly, gave me a realistic lead time, showed me the different product choices I could have and even allowed me to take home a sample window for a few days.

The installation process was a breeze - removing the old windows was not nearly as "major" as I had anticipated and there was a lot less mess than I had feared. The fitters were friendly and polite and explained how the mechanisms worked and cleared up after themselves very well. If I need new windows and doors next time I move I will be choosing Harp yet again.
Purple Star
Mar 22, 2018
We were extremely pleased with the quality of the workmanship carried out by Gary and his team of fitters. We had a new composite front door and french doors fitted and were very impressed with the service received, from the initial contact right through to the day of fitting. They completed each fitting within the same day as advised and were meticulous with making good and cleaning up after the job. I wouldn't hesitate to recommend Harp Windows. Thanks guys.
Colin A.
Aug 04, 2016
We have been using Harp Windows for over 4 years now initially as a recommendation from our local builder for windows and doors for our extension. Since then we have gradually replaced all of our remaining windows and are more than happy with the service and the products that have been used. We would certainly recommend them to others.
Tattanya
Oct 07, 2015
This is a very good company. They put customers first, they are efficient, professional and do a very good job. I would not hesitate to use them again. A job well done and we are very pleased. In our opinion the best double glazing company in the Watford area.