• Showroom & Head Office

    01923 231 111

Welcome to Harp – celebrating 31 fantastic years

Our factory and showroom are open for business! **New showroom hours: Monday-Friday 10am-3pm and Saturday 10am-2pm. Other times are available by appointment.** We’re here to deal with any enquiries and questions you may have and look forward to hearing from you soon! #readywhenyouare

Established in 1989, Harp Windows 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 Harp Windows, we do everything possible to ensure our customers are delighted with their new windows, doors or conservatory. We are fully endorsed by WHICH as a Trusted Trader, plus you can read many reviews about us on Checkatrade – and for further peace of mind our customers are always welcome to visit us at our showroom in St Albans Road Watford, or our factory in Watford, where we manufacture many of our products.

There are many good reasons to choose Harp Windows as your installer, including:

  • Fully endorsed as a WHICH Trusted Trader and Hertfordshire Trading Standards approved.
  • We are a FENSA registered company, 10912.
  • Our products are fully guaranteed for ten years.
  • We offer guarantee protection insurance backed warranties.
  • We are members of The Consumer Protection Association and Checkatrade.
  • Comprehensive Aftersales Service.

Based in Watford, we install high quality replacement windows, doors and conservatories in Watford, St Albans, Harrow, Pinner, Northwood, Hemel Hempstead, Berkhamsted, Amersham, Beaconsfield, High Wycombe and throughout Hertfordshire, Buckinghamshire, Middlesex and North London.

If you would like to receive a free, no obligation quotation please call us on 01923 231 111 or use our online “Quick Quote” service – we’re here to help. PLUS: Our blog features a range of articles about our products and exciting new developments within the industry.

Our Watford showroom

We have moved from Bushey to larger premises with more parking spaces at 91-93 St Albans Road, Watford, WD17 1UL. Entrance and parking via West Street – satnavs use postcode WD17 1RY.

Privacy and data protection: In accordance with the General Data Protection Regulation, we have updated our Privacy Policy accordingly.

Get a Quick Quote

Our Products

  • BI-FOLDING DOORS

    Transform your living space with our market leading bifold doors and open up a multitude of possibilities in your home.

  • PREMIUM SLIDING DOORS

    A modern take on the traditional sliding patio door with the perfect blend of aesthetics and functionality.

  • STYLISH FRONT DOORS

    High specification composite, uPVC, timber alternative and aluminium front doors that will complement any home.

  • TIMBER ALTERNATIVE WINDOWS

    Featuring timber-look mechanical joints with traditional internal timber aesthetics and deep wood-like cills, our Evolution windows look just like wood.

  • SLIDING SASH WINDOWS

    Virtually indistinguishable from timber, our sash collection offers many advantages including increased thermal and acoustic performance, ease of operation, and low maintenance.

  • CASEMENT WINDOWS

    Available in uPVC, aluminium and engineered timber, our casement windows offer better security features, more style choices and exceptional energy efficiency for your home.

Read our customer questionnaires
  • A Banks, Bushey, Herts

    “Just a short note to thank all at Harp Windows for a job carried out efficiently and professionally and to my complete satisfaction. I shall have no problem with recommending Harp Windows to anyone, and in fact have already done so”

  • M Long, Hemel Hempstead, Herts

    “I had my windows and porch installed by yourselves and was very pleased with the service, so much so I Recommended them to two people who have since had installations from you …”

Latest From Our Blog
  • Integral sealed unit blinds can be fitted inside any window or door in sizes from 300mm to 2600mm wide and in any frame – timber, aluminium or uPVC – and can even be

  • The Georgian window is the original multi paned window which became popular in the Georgian Period 1714 -1811 and was designed to bring in light, especially in darker

    https://harp-windows.co.uk/blog/

  • view more

Endorsements & Reviews

Watch Our Videos

  • Harp Windows (Watford) Ltd
  • 91-93 St Albans Road
  • Watford
  • Hertfordshire
  • WD17 1UL

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