The Hammer Group blends Diana's knowledge and experience with Callie's fresh, dynamic perspective and technical skills. Company statistics say the Hammer Group is a top producer, but the team's utmost goal is to provide a consistent, thoughtful, caring, dynamic real estate experience with the client’s needs foremost. Their business comes from satisfied clients and their friends.

Diana, who has worked full time in Marin County since 1987, brings her legendary reputation to real estate, having navigated every town and price range, learning the nuances of neighborhoods, microclimates, and schools. Her expertise extends from guiding young families with their first home to orchestrating complex estate situations. Diana’s a UC Berkeley alumna, and after sailing the Pacific for several years, became a Marin resident in 1977. She cherishes the variety and intimacy in her work and speaks French, Spanish, and Tahitian.

Callie is a Marin native with an infectious spirit complementing Diana's seasoned approach with her genuine care and down-to-earth demeanor. Her roots in Ross imbue her with a deep appreciation for Marin's great outdoors and family-friendly atmosphere. Drawing from a successful career in restaurant operations, Callie offers exceptional project management and hospitality skills that enhance every facet of real estate. She loves hiking and capturing moments through photography in the company of her husband, Nick, and their rescue dog, Indy.

Both Diana and Callie love the peace and beauty of Marin County open space, both spending many hours on Mt. Tam's trails and beaches.

The Hammer Group’s team of specialists-- inspectors, contractors, stagers and title people--enhance their transactions. Diana's reputation precedes her, elevating your offers and adding value to your listings by her strong network of fellow agents. Partnered with Callie's marketing expertise, passion for preparing homes and genuine devotion to helping clients achieve their dreams, their synergy brings an unparalleled package of energy, knowledge and caring.

Diana and Callie value the supportive culture and the cutting-edge marketing of their representatives at Golden Gate Sotheby’s International Realty. They are delighted to be a part of this well-regarded Bay Area brokerage.

The Hammer Group is your gateway to an exceptional real estate journey in Marin County.

Diana Hammer Lic.# 00973276 / Callie Hammer Lic.# 02113283

Callie is a genuinely positive, caring, and down-to-earth Marin native with an infectious spirit that makes her a joy to work with. She loves to laugh, have fun and create authentic relationships with her clients, always keeping their best interest at heart. Raised in the beautiful town of Ross, Callie grew up enjoying the unique outdoor lifestyle that Marin offers, the perfect place for nature lovers and raising a family. Professionally, Callie is known for her dedication, diligence and exceptional project management skills from her career as director of operations for three successful southern California restaurants. After having worked in the real estate field for over five years, she has returned to the Bay Area to join Diana Hammer forming The Hammer Group. Together, with Diana’s vast 36-year knowledge and expertise and Callie’s fresh energetic perspective, they are a great combination of experience and technological agility! Callie’s passions lie in preparing homes for the market and the hunt for the perfect dream home for her buyers.

In her free time Callie enjoys time on Mt. Tam exploring new trails, photography, camping and spending time with her husband Nick and their rescue dog Indy.

I offer you knowledge, experience, and reputation as your realtor. I've been working full time since 1987. I have sold houses in every price range throughout Marin. I know the nuances of neighborhoods, of mini climates and of schools. My experience makes me equally comfortable in dealing with a young family with children just starting out or a death in a family requiring the organization of a large estate. I cherish the variety and intimacy in my work—it is always meaningful, never superficial. My reputation precedes me and is perhaps my most important asset. When I am writing an offer for you, the listing agent will know me or about me—your offer will gain value due to my reputation. When I represent you as a seller, other agents will know they can trust what I say about your property and that I have been fair in helping you place a value on it. I have a large network of specialists who help me do my job including termite inspectors, stagers and contractors. I have built relationships with them and the different town inspectors over the years. I am partnered with Callie Hammer and together we formed The Hammer Group in 2020. I appreciate her tech and marketing skills. Her energy makes everything more fun! I work for Golden Gate Sotheby's International Realty, a highly esteemed Bay Area company. We have been impressed by their supportive nature and cutting-edge market knowledge. The office culture is kind and supportive. A University of California at Berkeley graduate, I lived in Ross in Marin County for 40+ years and raised my four children there. I have recently moved to San Geronimo Valley where I love the beauty and peace. I speak French, Spanish and Tahitian. I love living in Marin. Although company statistics state I am a top producer, my ultimate goal is to provide a consistent, thoughtful, caring, dynamic kind of real estate experience with my client’s needs foremost. My business comes from satisfied clients and their friends.