Our Story
Core Building Maintenance was built on a foundation that goes back more than 40 years. What started as Romero Maintenance LLC—a family business founded by my father—has served Southern California businesses since the mid-1980s. For over three decades, my father built a reputation for reliable, quality cleaning services that clients could count on, year after year.
In 2016, I took over the business and continued that same commitment to excellence. After years of running operations and learning every aspect of commercial cleaning firsthand, I made the decision to modernize the company and build something that will last for the next 40 years. Core Building Maintenance represents that next chapter—the same reliability our clients have always known, with a renewed focus on growth and long-term partnerships.
Proven Track Record
We don't just talk about reliability—we prove it. Our longest-standing client is a municipal facility that we've serviced continuously since the mid-1980s. That's nearly four decades of trust, built through consistent quality, responsive service, and showing up every single day.
When you partner with Core Building Maintenance, you're not working with a company that disappears after six months. You're working with a team that understands what it takes to maintain a relationship for years, even decades.
Local Ownership, Personal Accountability
Core Building Maintenance is locally owned and operated. When you call us, you're reaching the owner—not a call center, not a franchise manager, not a middleman.
I'm personally involved in every account we take on because your facility's cleanliness reflects directly on my name and my family's legacy. That level of accountability is something larger companies simply can't offer.
What We Stand For
Reliability — We show up, every time, on time.
Quality — We take pride in the details others miss.
Communication — Problems get addressed immediately, not ignored.
Long-term partnerships — We're not chasing quick contracts. We're building relationships that last.
Let's Talk About Your Facility.
We'd love to learn about your building and show you what reliable cleaning looks like.