A commercial glazing contractor built for FM teams
From reactive repairs and aluminium hardware replacement to complete facade installations, we’re the trusted glazing partner for facilities managers, schools, councils and commercial properties across London and the South East.
Family-run. Commercially serious.
NZR Windows & Doors was founded on a simple belief: commercial clients deserve the same care and attention as residential customers, backed by the speed and capability their buildings demand.
Over two decades later that principle still drives everything we do. From our base in Swanley, we’ve grown into a trusted partner for facilities managers, schools, retail brands and property developers across London, Kent, Surrey and Essex.
We’re still family-run at heart — which means you’ll speak to people who care about your project, know your building, and will be there when you need us.
“Do it right. Do it once. Leave it clean.”
Professional. Certified. No excuses.
Every accreditation an FM team needs to put us on the approved list.
FENSA Registered
Certified for residential and commercial installations.
CHAS Gold Accredited
Compliant with industry health & safety standards.
Constructionline Gold
Pre-qualified contractor for public-sector work.
DBS-Cleared Teams
Approved for schools and sensitive environments.
Fully Insured
£10m public, employer and PI cover.
Sector knowledge that works on site
Every sector has its own access constraints, compliance standards and tolerances. We work to all of them — quietly, cleanly, on programme.
Clients We've Worked With
Trusted by leading brands across retail, corporate, education and public sectors
Logos shown for reference
Serving London & the South East
From our Swanley base — usually on site within the hour.
What our clients say
"Reliable, professional, and always available when we need them. Their planned maintenance keeps our stores running smoothly across multiple sites."
James Thompson
Facilities Manager • Multi-site Retail
"Highly recommend NZR. Complex shopfront requirements delivered exactly as needed. Great communication throughout."
George Meco
Business Owner • Retail
"Zach's team handled a difficult curtain walling repair on a live office building with zero disruption to tenants. Spot on."
Sarah Williams
Property Manager • London
"Called them out for an emergency board-up after a smash — on site in under two hours, glazing replaced the next morning."
Mark Davies
Site Manager • Main Contractor
"Professional, communicative and tidy. Even when things got complicated they handled it brilliantly. Highly recommend."
Beckie Anderson
Homeowner • London
"Went above and beyond on a tricky window repair. On time, clean, professional team."
Jim Mcfarlane
Homeowner • Kent
"Quoted, installed and handed over inside two weeks. Tidy site, clear comms, fair price."
Daniel Okafor
Operations • Hospitality
"Used NZR for two school holiday installs — both finished on time with all paperwork in order."
Priya Shah
Estates Officer • Education
Ready to work together?
Site survey, tender response, planned maintenance contract or reactive call-out — speak to the team direct.
Swanley, Kent
BR8 7PA
- Mon – Fri07:00 – 18:00
- Saturday08:00 – 14:00
- Emergency24/7