GROUNDSOURCE is a Los Angeles based full-service commercial real estate firm that specializes in representing tenants, landlords and investors. Experience in the L.A. marketplace lets it combine extensive insider knowledge with trusted partnerships to create unparalleled value. A boutique firm, it offers clients prestigious service with an intimate, hands-on approach.

It isn’t just about satisfied clients. It’s about repeat clients. Therefore, Groundsource spends whatever time it takes to close the deal the right way. Good business is about a connection, not a commission, which is why Groundsource is by the client’s side from fact-finding to lease execution to signing of a purchase and sale agreement.


Chris Keller has represented tenants and landlords in Los Angeles for over 18 years, between Madison Partners and Cushman and Wakefield, an international commercial real estate firm.


Daniela Winter brings over 30 years of experience in office administration in the legal, interior design, restaurant, branding and non-profit fields.


Mark Dalton, born and raised in Rancho Palos Verdes, CA, graduated from the University of Southern California with a B.S. in Real Estate Development and a Minor in Business Finance.