Business Details
37 Years
experience
Your Trusted Home Builders in Watford
Established in 1989, Harp Windows is a family-run business with decades of experience in manufacturing and installing 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 installer endorsed by Which? Trusted Trader and Hertfordshire Trading Standards. We operate from our Watford showroom and factory, serving Hertfordshire, Buckinghamshire, Middlesex, and North London. Our products come with a 10-year guarantee backed by insurance, and we maintain memberships with the Consumer Protection Association and Checkatrade.Our comprehensive after-sales service ensures prompt resolution of any issues, with a dedicated service engineer available for urgent repairs. With over 250 customer reviews highlighting our attention to detail, punctuality, and clean workmanship, we prioritise customer satisfaction at every stage of the process. Our partnerships with Origin Premium Partners and FENSA registration further demonstrate our dedication to quality and compliance with industry standards.
Services
Replacement Windows
Conservatories
Bi-Folding Doors
Sliding Sash Windows
Composite Front Doors
Timber Alternative Windows
Casement Windows
Premium Sliding Doors
Door Replacements
After-Sales Service
Details
- Year established: 1989
Highlights and features
- Family-run business with 36 years of industry experience since 1989
- Endorsed by Which? Trusted Trader for proven reliability and service
- FENSA-registered with 10-year insurance-backed product guarantees
- Comprehensive after-sales service with rapid response times
- Over 250 verified customer reviews highlighting exceptional workmanship
Associations and certifications
- Which? Trusted Trader
- FENSA
- The Consumer Protection Association
- Hertfordshire Trading Standards
- Origin Premium Partners
- Checkatrade
What people say
Fantastic service
Quality products
Excellent workmanship
No fuss
Highly recommend
Services
Bi-Folding Doors
Transform living spaces with our market-leading bi-folding doors that combine aesthetic appeal with functional design. These doors create seamless transitions between indoor and outdoor areas while maintaining thermal efficiency. Ideal for modernising homes, they feature robust construction and smooth operation mechanisms that enhance property value and usability.
Sliding Sash Windows
Our sliding sash windows replicate traditional timber aesthetics while offering modern performance benefits. With enhanced thermal and acoustic insulation, these low-maintenance windows provide authentic charm alongside improved security features. They are virtually indistinguishable from classic wooden sashes but require minimal upkeep.
Composite Front Doors
Upgrade home entrances with our high-specification composite doors that blend security and style. Available in uPVC, timber alternative, and aluminium options, these doors offer enhanced insulation properties and durable construction. Each design complements various architectural styles while providing superior protection against forced entry.
Timber Alternative Windows
Evolution timber alternative windows deliver traditional internal aesthetics with modern mechanical joints and deep wood-like cills. These windows maintain the visual appeal of natural timber while offering the advantages of low-maintenance materials. They provide excellent thermal performance and long-lasting durability without compromising on style.
Conservatories
Create additional living space with custom-built conservatories that maximise natural light and energy efficiency. Our installations feature advanced glazing systems and thermally efficient frames that ensure year-round comfort. Designed to complement existing property architecture while adding functional space for homeowners.
Questions
What guarantees do you offer with your window and door installations?
All products come with a 10-year insurance-backed guarantee covering both materials and workmanship, registered through FENSA and the Consumer Protection Association.
Which areas do you serve for window and door installations?
We operate across Hertfordshire, Buckinghamshire, Middlesex, and North London, including Watford, St Albans, Harrow, and Hemel Hempstead.
Are your installers certified professionals?
Yes, we are FENSA-registered and Which? Trusted Trader-endorsed, with fully trained installers maintaining industry standards and building regulations compliance.
Can I visit your showroom before purchasing?
Our Watford showroom offers product displays and expert advice, open Monday-Friday 10am-3pm and Saturday 10am-2:30pm by appointment.
How long does the installation process typically take?
Most window and door installations complete within 1-2 days, with manufacturing lead times typically around 6 weeks from order confirmation.
Do you offer after-sales support for installed products?
We provide comprehensive after-sales service including warranty claims, repairs, and maintenance support with rapid response times for urgent issues.
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