The Greenbrae Property Owners Association (GPOA), a non-profit corporation, was formed in 1948 by the early residents of Greenbrae, with jurisdiction over the first subdivision, as well as any contiguous subdivisions subsequently developed in Greenbrae.  At present, this includes approximately 1,250 parcels on the hills north of Sir Francis Drake Boulevard. Among other powers,  the corporation was qualified to accept from the Schultz Company, the power to administer Covenants, Codes and Restrictions (CC&Rs') .  In 1970, the Schultz Company assigned the all rights to enforce and administer the CC&Rs to the GPOA.

The Greenbrae Community has four entrances on Sir Francis Drake Boulevard, three public park areas, and numerous median strips which contain extensive landscaping.  The entrances, parks and landscaped median strips provide a unique and complimentary appearance to the Greenbrae neighborhood.  The Schultz company had, for many years, maintained these common areas.  However in 1970, upon assigning its rights to administer the CC&Rs to the GPOA, the Schultz Company halted their efforts in this regard, passing the task on to the GPOA Board.

In 1971, the Marin County Board of Supervisors passed a resolution establishing County Service Area No. 16, whose purpose was to provide local park and recreation facilities and services, including maintenance of the common areas in Greenbrae.  The City of Larkspur consented to the inclusion of their incorporated territory within the County Service Area.  An election was held and the residents of Greenbrae voted to impose an assessment on their property taxes to maintain the area.  In 1989 residents voted to increase the assessment to between $45 and $75 per parcel, followed by another resident vote approval approved increase in 1993 to its current level of $150 per parcel, per year.  

In 1975, the GPOA and the County of Marin entered an agreement whereby the GPOA agreed to administer CSA #16 under the direction of the Marin County Board of Supervisors.

The GPOA Architectural Review Committee (ARC) is a committee of GPOA Board members responsible for reviewing development and improvement proposals including fences, decks, additions, new construction and related matters.  In addition to reviewing plans for proposed improvements within the community, ARC maintains a liaison with the Kentfield Planning Advisory Board, and the Planing and Building departments of both County of Marin and the City of Larkspur.