With over 25 years of experience, NZR Windows and Doors delivers high-quality installations across London, Kent, Essex, and surrounding areas. Whether you’re upgrading a single window or fitting out a full new build, our in-house team handles every job with care — no subcontractors, no shortcuts.
🔧 Aluminium and uPVC Window Installation
We supply and fit modern, energy-efficient windows for homes, flats, and new builds. Choose from slimline aluminium or secure uPVC double glazing. All installations are clean, fast, and compliant with building regulations.
🚪 Composite and Aluminium Door Installation
Front and back doors built for strength, style, and long-term performance. We install composite and aluminium doors for houses, flats, porches, and refurbishment projects.
🪟 Bifold, Sliding and French Door Systems
Upgrade your space with high-performance aluminium bifolds, sliding doors, and classic French doors. Ideal for extensions, gardens, patios, and open-plan living — fitted with secure locking and thermal glass.
🌡️ Double and Triple Glazing Installation
Boost insulation, security, and noise reduction. We supply and fit A-rated double and triple glazed units for all types of homes.
🌍 Areas We Cover
We install windows and doors across: London, Kent, Essex, Bexley, Dartford, Sidcup, Orpington, Bromley, Eltham, Greenwich, Blackheath, Beckenham, Chislehurst, Whitstable, Gravesend, Canterbury, Maidstone, Tunbridge Wells, South East London, East London, North Kent, and all surrounding areas.
✅ FENSA Registered
Certified for residential and commercial installations
✅ CHAS Accredited
Compliant with industry health and safety standards
✅ IOSH Certified
Trained in site safety and risk management
✅ Fully Insured
Public and employer’s liability covered
✅ 10-Year Guarantee
Included with every installation
✅ DBS and CSCS-Cleared Teams
Approved for schools, homes, and construction sites
✅ Clean, Tidy Workmanship
Trusted by housing associations and developers
✅ Same-Day Emergency Response
Covering London, Kent and surrounding areas
✅ Fast, Competitive Quotes
No delays. No excuses.
Upgrade your home with a new composite, uPVC, or aluminium front door — built for security, energy efficiency, and kerb appeal. Choose your style, colour, and material.
Bring in more light, air, and space with smooth-folding aluminium bifold doors — perfect for rear openings, kitchen extensions, or garden rooms. Built to order and installed with precision.
We supply and fit top-quality uPVC and aluminium windows, along with sleek sliding doors that suit all types of homes. Whether it’s a full property upgrade or replacing a few tired units, NZR delivers sharp, secure results with minimal disruption — all carried out by our experienced in-house team.
We supply and install quality uPVC and aluminium sliding doors that glide smoothly and look the part. Perfect for garden access, extensions, or open-plan spaces. Every install is handled by our in-house team
Roof lights are a brilliant way to brighten interiors and make rooms feel bigger. Our systems are sleek, secure, and energy-efficient — ideal for extensions, orangeries, and flat roof builds.
💬 We respond fast — usually within 1 hour.
The Old Barn Off Wood Street, Kent, BR8 7PA
📞 24/7 Emergency Line: 07503 379215 📞 Office: 020 8970 7013
Mon | 06:30 – 19:30 | |
Tue | 06:30 – 19:30 | |
Wed | 06:30 – 19:30 | |
Thu | 06:30 – 19:30 | |
Fri | 06:30 – 19:30 | |
Sat | 08:00 – 17:30 | |
Sun | 08:00 – 17:30 |
All residential window and door installations carried out by NZR Windows and Doors are fully compliant with current UK building regulations, including thermal performance, ventilation, fire safety, and structural standards.
We are FENSA-registered (Reg. No. 20435), meaning all relevant works are certified, insured, and registered with local authorities — with no need for customers to apply for approval themselves.
Installations are carried out by qualified, experienced professionals and come with a 10-year guarantee. We only use high-quality systems that meet or exceed British Standards for glazing, energy efficiency, and security.
For listed properties or conservation areas, we work closely with local planning teams to ensure full heritage compliance.