Since the inception of the Law Offices of Marc Grossman in 1998, it has been my greatest privilege and honor to serve our community through our law firm. I undertake this responsibility with both pride and the weight of upholding a family legacy of trust, integrity, and respect. This legacy traces its origins 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 would often encounter people who would share stories about my wonderful grandparents, who had been incredibly helpful and had made a positive impact on their lives. That sense of awe and admiration continued to motivate me 30 years later as a young attorney when community members would approach my children, recounting how much my father had assisted them during challenging times. Up until his passing in 2021, my father dedicated his professional life to serving as an Elder Law Attorney, helping local clients with estate and end-of-life matters at a time when trust was paramount.
My roots are deeply embedded in Upland, where I attended Upland High School and even worked as a substitute teacher during law school. I have raised my children in Upland, making them the fourth generation of my family to carry the legacy of a good name in the community. In addition to my local heritage, I am guided by my Jewish faith, which underscores the principle of “Tikkun Olam,” signifying my duty to engage in various actions aimed at repairing and improving the world. I fulfill this duty by infusing trust, integrity, and respect into the professional services I provide, thereby honoring my family’s esteemed name and reputation, a duty I bear with pride.
Why Offer Free Consultations? It is both my business philosophy and a commitment to every individual who walks through my door. I promise to offer them the same advice I would give if they were my sibling, best friend, or family member. Unlike firms that focus solely on a single practice area, my business practice and philosophy center around creating the widest range of opportunities to assist people, providing them with 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 endeavor 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.
Our Vision
Marc upholds a cherished family legacy by infusing Trust, Integrity, and Respect into the delivery of professional services, ensuring that these traditions endure.
Integrity
We create extensive opportunities to offer individuals the best advice, even when it may not align with our immediate self-interest.
Trust
Serving our community's most vital concerns through our Law Firm and Brokerage has been our privilege and duty.
Respect
Our clients are not just clients but our guiding lights, with their objectives becoming our objectives and their battles becoming our battles.
Hector Rafael Castaneda
REAL ESTATE BROKER (27 years experience)
Buyer’s Agent, Listing Agent, Foreclosure, Legal Matters, Divorce, Trust, Probate, Landlord Representation
Hector Rafael Castaneda is a Upland, California native, hailing from 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 attended local schools and proudly graduated from Upland High School. He then pursued his Bachelor of Business Administration in Sales Marketing at New Mexico State University (NMSU) in Las Cruces, New Mexico. During his time at NMSU, he held the roles of President of the Hispanic Business Student Association, Head Coordinator of the Special Olympics at NMSU, and was an active member of Delta Sigma Pi, a professional business fraternity.
Hector Rafael Castaneda
Real Estate Broker
Mr. Castaneda has been actively involved in the Real Estate industry since 1995. He enjoyed years of successful mentorship, stewardship, and recruitment as a Realtor for local brokers. In 2004, he took the helm as a Branch Manager for a local Century 21, becoming the youngest manager in the region for that system. During his tenure, he propelled the branch from the 13th to the 3rd position in the region. He was also introduced to radio advertising as the “on-air” character and personality, “Hectorthehomefinder,” on Wild 96 FM and K
Dehaven Leniger
LICENSED REAL ESTATE AGENT
Specializations: Listing Agent, Buyer’s Agent, Divorces, Probate, Trust, and Foreclosures
Dehaven Leniger was born in Los Angeles, California, and raised in Pismo Beach, California. She relocated to the Inland Empire in 1991, where she raised her two children and now enjoys the company of five grandchildren.
With nearly a quarter-century of experience, Dehaven has been an integral part of the Real Estate industry since 1999. She initiated her real estate journey by working with a title company, gaining comprehensive knowledge of real estate transactions.
This experience equipped Dehaven with the tools to navigate real estate deals successfully and smoothly. 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 time at Century 21, she honed her negotiation skills and emerged as a leader in closing deals within her office.
Dehaven Leniger
LICENSED REAL ESTATE AGENT
In 2016, and for the subsequent four years, Dehaven was selected to serve on the Agent Leadership Council (ALC) for top-selling agents. In addition to her role on the ALC, Dehaven also volunteered for the Grievance Committee at the Citrus Valley Association of Realtors, where she contributed her expertise for three years. In 2018, Dehaven was elected to the Board of Directors at the Citrus Valley Association of Realtors, serving 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.
