Ever since the establishment of the Law Offices of Marc Grossman in 1998, it has been my foremost privilege and duty to serve our community through our law firm. I embrace this role with both pride and the responsibility of upholding a family legacy characterized by trust, integrity, and respect. This legacy can be traced back to my grandparents, who settled in Ontario nearly a century ago. As a young child accompanying my father around town some 50 years ago, I frequently encountered individuals who shared stories about my remarkable grandparents, emphasizing the profound impact they had made by offering assistance to those in need. That sense of admiration and respect continued to drive me 30 years later as a young attorney when community members would recount how my father had provided valuable support during challenging times. Up until his passing in 2021, my father dedicated his professional life to serving as an Elder Law Attorney, assisting local clients with estate and end-of-life matters during periods when trust was paramount.
My roots are firmly planted in Upland, where I attended Upland High School and even served as a substitute teacher during my time in law school. I have raised my children in Upland, making them the fourth generation of my family to carry the legacy of a respected name within the community. In addition to my strong local ties, I am guided by my Jewish faith, which underscores the principle of “Tikkun Olam,” highlighting my duty to engage in actions aimed at repairing and enhancing the world. I fulfill this duty by infusing trust, integrity, and respect into the professional services I provide, thus honoring my family’s esteemed name and reputation, a responsibility I bear with pride.
Why Do We Offer Free Consultations? It is both my business philosophy and a commitment to every individual who walks through our doors. I promise to provide them with the same advice I would give if they were my sibling, best friend, or family member. Unlike firms that specialize exclusively in one practice area, my business practice and philosophy revolve around creating the broadest range of opportunities to assist people, giving them the best advice even when it may not serve my immediate self-interest. When there are alternative, cost-effective, or more suitable solutions to address a situation, I will always strive to help my clients explore the options that are in their best interest. Clients are often pleasantly surprised when I present them with better or alternative approaches to solving their problems, even if it means not hiring me. While it may be uncommon in today’s local professional landscape, prioritizing my clients’ interests is how we ensure that the legacy of Trust, Integrity, and Respect continues.
Marc is dedicated to upholding a cherished family heritage by embedding Trust, Integrity, and Respect into the way professional services are delivered.
Serving our community's most critical concerns through our Law Firm and Brokerage has been both our privilege and our honor.
We create ample opportunities to provide people with the best advice, even when it might contradict our own best interests.
Our clients are not just clients, but our foremost inspirations, where their objectives become ours, and their battles become our battles.
Specializations: Buyer’s Agent, Listing Agent, Foreclosure, Legal, Divorce, Trust, Probate, Landlord
Hector Rafael Castaneda was born and raised in Upland, California, located in the western region of San Bernardino County. He is the youngest child of Carlos and Irma Castaneda, who immigrated from Chihuahua, Mexico to California in the mid-1950s. Mr. Castaneda received his education in local schools and proudly graduated from Upland High School. He furthered his studies at New Mexico State University (NMSU) in Las Cruces, New Mexico, where he earned a Bachelor of Business Administration in Sales Marketing.
During his time at NMSU, Mr. Castaneda held significant leadership roles, serving as the President of the Hispanic Business Student Association, the Head Coordinator of the Special Olympics at NMSU, and a member of Delta Sigma Pi, a professional business fraternity.
With 27 years of experience, Mr. Castaneda has made a significant impact on the Real Estate industry since 1995. He has enjoyed success as a Realtor for local brokers, providing mentorship and recruitment. In 2004, he was entrusted with the role of Branch Manager at a local Century 21, becoming the youngest manager in the region for that system. During his tenure, he transformed the branch from the 13th to the 3rd position in the region. He also ventured into radio advertising, assuming the persona of “Hectorthehomefinder,” featured on Wild 96 FM and KDAY 93.5 FM.
In 2007, Mr. Castaneda assumed the leadership at MGR Real Estate in Upland, California. His guiding philosophy is based on the principle: “We are what we repeatedly do. Excellence, then, is not an act, but a habit.” He is dedicated to propelling the staff at MGR Real Estate to achieve new levels of success. As a full-time manager, he is available to his staff for over 45 hours per week, with a strong focus on professionalism, knowledge, and supervision in the Inland Valley.
In 2013, Mr. Castaneda joined Keller Williams in Rancho Cucamonga, California, as a Broker Associate, representing clients not only statewide but nationwide. In addition, he administered and consulted on property rehabilitation, sales, and leasing for over 2,000 properties in more than 40 states for a non-profit organization called Homestrong USA, dedicated to assisting veterans nationwide. Learn more about their mission at www.homestrongusa.org.
In January 2016, Mr. Castaneda assumed the role of Managing Broker at Tarbell Realtors in Corona, California. Alongside his responsibilities in recruiting, training, and retaining the finest agents in the Inland Empire, he remains actively engaged as an active Listing/Buyers Broker.
Today, Mr. Castaneda takes immense pride in his position as the Managing Broker for Grossman Real Estate in Upland, California. Their specialization lies in providing real estate services dedicated to Probate, Trust, Dissolution, Divorce, and properties with lien or title issues.
Mr. Castaneda is fluent in Spanish, actively participates in community events, engages with his church, exercise groups, and enjoys community theater. He resides locally, raising his son Evan.
Specializations: Listing Agent, Buyer’s Agent, Divorces, Probate, Trust, and Foreclosures
Dehaven Leniger, a native of Los Angeles, California, was raised in Pismo Beach, California. In 1991, she made the Inland Empire her home, where she raised her two children and now revels in the joy of being a grandmother to five.
With nearly 25 years of experience, Dehaven has been an integral part of the Real Estate industry since 1999. She embarked on her real estate journey by working with a title company, where she gained a profound understanding of real estate transactions.
This experience equipped Dehaven with the expertise needed to smoothly navigate real estate deals. In 2011, she transitioned from the title industry to become a Realtor with Century 21 Beachside in Upland, where she remained until 2015. During her tenure at Century 21, she honed her negotiation skills and emerged as a leader in closing deals within her office.
From 2016 onwards, Dehaven was honored to be part of the Agent Leadership Council (ALC) for top-selling agents, a role she held for four years. In addition to her ALC role, Dehaven also dedicated her time to the Grievance Committee at the Citrus Valley Association of Realtors, where she served for three years. In 2018, Dehaven was elected to the Board of Directors at the Citrus Valley Association of Realtors, where she served a two-year term as a Director while also participating on the Professional Standards Committee. Before the onset of the Covid pandemic, Dehaven also taught real estate classes at CA RealtyTraining, sharing her passion for real estate with the next generation.
Dehaven brings her unwavering dedication to her family, community, and clients with real estate needs. Her interests include travel, fitness, quality time with family, creating lasting memories, and cherishing life experiences.
