- Commercial Window Cleaning
Window cleaning and maintenance
Professional cleaning & maintenance that keeps your premises pristine & safe. Expert care, guaranteed shine.
01206 237971
Trusted Reviews
Get free quote
Please fill out the form below we’ll get back to you.
- Our Services
Professional Cleaning Services
Complete maintenance solutions designed to keep your property, clean, and operating efficiently.
Call us today to get started.
- About Us
About C21 Window Cleaning & Maintenance Ltd
At C21 Window Cleaning & Maintenance, we provide complete commercial cleaning services designed to keep your premises clean, safe, and presentable all year round. Our trained operatives combine professional expertise with modern equipment to deliver dependable results for offices, shops, retail units, and blocks of flats across Chelmsford, Essex and London.
Our fully insured specialists ensure every site receives professional attention and thorough care.
We prioritise reliable service, clear communication, and long term client relationships.
We use pure water systems and modern machinery for outstanding cleaning performance.
- How It Works
From Grimy To Gleaming
Our streamlined approach takes the guesswork out of commercial cleaning, delivering consistent results through careful assessment, professional cleaning, thorough finishing, and a final quality check.
Assess
We start by reviewing your building’s access points, surfaces, glazing, and overall condition to identify what needs attention.
Clean
Dirt, moss, algae, and buildup are removed from windows, frames, gutters, hard surfaces, and surrounding areas.
Finish
We detail the areas that get missed, from sills and cladding to entrance glass, leaving the whole building presentable.
Check
Before we leave, we carry out a final inspection to make sure everything is clean, safe, and up to standard.
- Service area
Professional Commercial Cleaning In Chelmsford, Essex & Across London
C21 provides dependable commercial cleaning and maintenance services for offices, shops, retail units, blocks of flats, and block management companies throughout Chelmsford, Essex and London.
- Client feedback
What our clients say about working with us
C21 have made keeping our offices presentable completely straightforward. The windows are spotless every visit and the team works around our staff without any disruption. Reliable, tidy, and always on the day they say they'll be here. We haven't had to chase them once.
Property Manager / Danbury
We manage several blocks across mid Essex and C21 handle the lot. Communal windows, gutters, and the car park power washing are all done to a consistent standard. Residents have stopped complaining, which is the best endorsement I can give any contractor. Genuinely easy to deal with.
Retail Unit Owner / Chelmsford
Our shopfront gets filthy from the road and C21 keep it looking sharp week in, week out. The gutter clearance they did last autumn sorted a leak we'd been ignoring for months. Fair pricing, proper communication, and they spotted the problem before we did.
Real feedback from homeowners and businesses who trusted us to bring their construction projects to life.
- Have Questions?
Before You Reach Out.
Which areas do you cover?
We provide commercial cleaning across Chelmsford, Essex and London, covering offices, shops, retail units, and blocks of flats. If you’re just outside our usual patch, get in touch and we’ll let you know honestly whether we can service you properly.
How often should our windows be cleaned?
We offer window cleaning on 4, 6, 8 or 12 weekly schedules, so you can keep glass looking sharp without paying for visits you don’t need. High street shops often want more frequent attention, including weekly internal and external cleans. We’ll recommend a schedule based on your building and how it’s used rather than selling you a fixed package.
Are you insured, and do your team work safely at height?
Yes. We carry full public liability insurance and our operatives are trained for working at height. We use water fed pole systems for most upper floor glazing, which avoids ladders entirely and means less disruption and less risk on your site, whether that’s an office, a shop, or a block of flats. Certificates are available on request.
Do you work with block management companies?
Yes, this is a large part of what we do. We clean blocks of flats across Chelmsford, Essex and London, handling communal window cleaning, gutter clearance, bin store and car park power washing, and general exterior maintenance. We can work to a fixed annual schedule with agreed reporting so you have a clear record for residents and freeholders.
Sarah WhitfieldOffice Manager / Springfield