Business Details
37 Years
experience
Trusted Window and Door Installations in Watford Since 1989
Established in 1989, Harp Windows is a family-run business specialising in the manufacture and installation of high-quality replacement windows, doors, and conservatories. Our commitment to professional integrity, efficient customer service, and value for money has earned us a reputation as a trusted provider in the industry. We are endorsed by Which? as a Trusted Trader and hold memberships with Checkatrade, FENSA, and The Consumer Protection Association, ensuring rigorous standards of craftsmanship and customer care.Our products come with a 10-year guarantee backed by insurance, and we offer a comprehensive after-sales service for complete peace of mind. Based in Watford, we serve Hertfordshire, Buckinghamshire, Middlesex, and North London, with a showroom showcasing our full range of products. Our team prioritises transparency, punctuality, and attention to detail, ensuring every installation meets the highest standards of quality and customer satisfaction.
Services
Windows
Doors
Conservatories
Bi-Folding Doors
Sliding Sash Windows
Casement Windows
Composite Doors
Timber Alternative Windows
Patio Doors
Conservatory Installations
Details
- Year established: 1989
Highlights and features
- We have over 35 years of experience in window and door installations.
- Our products are fully guaranteed for ten years with insurance-backed warranties.
- We are endorsed by Which? as a Trusted Trader and approved by Hertfordshire Trading Standards.
- Our comprehensive after-sales service ensures prompt resolution of any issues.
- We operate with transparency, offering no hard sell and honest pricing.
Associations and certifications
- Which? Trusted Trader
- FENSA
- The Consumer Protection Association
- Checkatrade
What people say
Fantastic service
Excellent service
Quality window
Highly recommend
No fuss, no mess
Services
Bi-Folding Doors
Our market-leading bi-folding doors transform living spaces by seamlessly connecting indoor and outdoor areas. Designed for durability and aesthetics, they feature advanced thermal insulation and low-maintenance materials. Ideal for modernising homes while enhancing natural light and accessibility.
Sliding Sash Windows
Virtually indistinguishable from traditional timber, our sliding sash windows offer superior thermal efficiency and acoustic performance. They combine classic aesthetics with modern functionality, including easy operation and minimal maintenance requirements.
Composite Doors
High-specification composite doors provide enhanced security and energy efficiency. Available in uPVC, timber alternative, and aluminium finishes, they are designed to complement any property while offering long-term durability and style.
Casement Windows
Available in uPVC, aluminium, and engineered timber, our casement windows offer improved security and energy efficiency. They feature customisable designs to suit both traditional and contemporary homes, with exceptional thermal performance.
Conservatory Installations
We design and install bespoke conservatories that extend living spaces with natural light. Using premium materials, our conservatories provide year-round comfort, combining structural integrity with energy-efficient glazing solutions.
Questions
What services does Harp Windows offer?
We specialise in replacement windows, doors, and conservatories, including bi-folding doors, sliding sash windows, and composite doors.
Do your products come with guarantees?
All products include a 10-year insurance-backed guarantee for complete peace of mind.
Which areas do you serve?
We operate in Watford, St Albans, Harrow, Hemel Hempstead, and across Hertfordshire, Buckinghamshire, and North London.
How long does installation take?
Most installations are completed within six weeks from order, with urgent cases prioritised.
Are your installers certified?
We are FENSA-registered and endorsed by Which? as a Trusted Trader, ensuring industry compliance.
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Reviews (5)
Reg Lopez
Dec 02, 2021
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The team from Harp did a great job with our windows . From providing all the info needed to comply with the landlords 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 , its been a pleasure to deal with knowledgeable, good people before and during the installation . Thank you - we are really pleased and wouldnt hesitate to recommend.
Alex Jones
Oct 16, 2021
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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
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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
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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
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Just had two bay windows renewed. Excellent work by careful and thoughtful installers, and reasonable prices. Highly recommended.
