Our Story, Mission & Dedication to Excellence
Built from the ground up by Rosa Nelly Castro on the timeless principles of honesty, rigorous attention to detail, and client reliability.
Primary Business Owner & Director
Rosa Nelly Castro
15+ Years Commercial & Post-Construction Experience
"When You Hire RNC, You Hire Our Personal Commitment"
Fifteen years ago, Rosa Nelly Castro began commercial cleaning with a simple but fierce belief: Colorado businesses, developers, and property managers deserve a cleaning partner who genuinely cares about their deadlines, their brand reputation, and their safety.
Over the past decade and a half, RNC Commercial Cleaning Services LLC has grown into one of the most reliable post-construction and commercial cleaning providers across Denver and all of Colorado. We have scrubbed, sanitized, and detailed millions of square feet—from towering commercial office complexes to high-end residential lofts and newly framed medical facilities.
15+ Years
In Business & Job Site Leadership
100%
Client Punch-List Guarantee
Core Values That Guide Every Clean
How we approach every job site across Colorado.
Uncompromising Precision
Drywall dust travels into every vent, window seam, and light fixture. We take the extra time to extract, wipe, and polish every inch so you pass turnover inspection on the first walkthrough.
Transparent Relationships
Clear communication, honest walkthrough estimates, and no surprise charges. When we commit to a deadline, our crews stay until the work is 100% complete.
Health & Eco-Safety
We safeguard indoor air quality with HEPA air filtration and biodegradable, green cleaning solutions that leave commercial facilities fresh, clean, and non-hazardous.
The RNC Standard of Commercial Excellence
Every square foot we clean is backed by our owner-led quality management system, designed specifically for strict commercial handoffs and ongoing facility upkeep.
1. Punch-List Audits
Every project concludes with a multi-point audit covering all high-reach surfaces, fixtures, window tracks, and flooring before handover.
2. Compliance & COI
Full licensing, active workers' comp, and commercial general liability insurance guarantee compliance on every Colorado job site.
3. Pro Grade Equipment
We bring industrial HEPA extractors, commercial auto-scrubbers, floor burnishers, and specialized scrapers for all heavy residue.
4. Eco-Safe Solutions
Safe, hospital-grade green disinfectants maintain superior air quality without harsh, irritating chemical fumes in occupied spaces.
Company & Experience FAQs
Learn more about our licensing, experience, and operational standards.
Founder and primary business owner Rosa Nelly Castro brings over 15+ Years of hands-on commercial, post-construction, and facility cleaning leadership throughout Denver and Colorado.
See the Quality of Our Work in Action
Browse our project gallery showcasing recent post-construction turnovers and corporate commercial transformations across Colorado.