About Hillary Castillo, Realtor®

Hillary Castillo is a dedicated North Texas Realtor® proudly serving clients as part of the Chrissy Mallouf Real Estate Group powered by REAL, a brokerage built on the belief to Work Hard. Be Kind.

An Argyle native who has spent her entire adult life in Denton, Hillary knows this community inside and out. She’s deeply passionate about serving the place she calls home — not only through real estate, but also through active involvement in local nonprofits and community initiatives that strengthen Denton County.

With more than two decades of leadership experience in finance, operations, and client service, Hillary brings strategic thinking and strong negotiation skills to every transaction. Before stepping fully into real estate, she worked extensively in property management alongside residents, owners, and investors — giving her a well-rounded understanding of both the emotional and investment sides of buying and selling property.

Today, as part of the Chrissy Mallouf Real Estate Group at REAL, Hillary combines cutting-edge tools, collaborative expertise, and a client-first philosophy to deliver exceptional results. Her approach is simple: personalized service, local expertise, and real results. Whether you’re purchasing your first home, selling a property, or building your investment portfolio, she guides you with clarity, honesty, and unwavering commitment from contract to close.

Outside of real estate, you’ll likely find Hillary at a youth sporting event cheering on her three boys — Dewayne, Jace, and Cruz — or hosting friends and family in the backyard with her husband, Mando. A proud sports mom and community advocate, she believes relationships are the foundation of everything — in business and in life.