Contact Us Search
Organization Title

The Land Conservation (Williamson) Act

The California Land Conservation Act of 1965--commonly referred to as the Williamson Act--enables local governments to enter into contracts with private landowners for the purpose of restricting specific parcels of land to agricultural or related open space use. In return, landowners receive property tax assessments which are much lower than normal because they are based upon farming and open space uses as opposed to full market value. The Open Space Subvention Act of 1971 provided local governments an annual subvention of forgone property tax revenues from the state through the year 2009; these payment have been suspended in more recent years due to revenue shortfalls.

New and Frequently Requested Information

Open Space Subventions - 2014 Survey of Participation

The FY 2014 Survey of Participation is now available on the Open Space Subvention Payments page.  Despite elimination of the 2014 OSSA payments, this information is critical in order to document the level of participation in the program and the impact the loss of OSSA payments is having on local governments.  It is the basis for the biennial Land Conservation Act Status Report, which provides information to the Legislature and general public on the status of the Williamson Act Program among counties and cities.

Solar-Use Easements - Senate Bill 618 Offical Regulations - Effective February 1, 2014

In December 2013, the Department of Conservation submitted official regulations to the Office of Administrative Law to adopt 18 sections to Title 14 of the California Code of Regulations, which establishes the procedures, fees, standards, and criteria for solar-use easements. The regulations clarify SB 618 language and the Department of Conservation’s role in implementing the solar-use easement statute.  Through these procedures, solar-use easement agreements may be approved between cities or counties and agricultural landowners that are parties to Land Conservation and Farmland Security Zone Act contracts, as provided in SB 618.  Please see the Solar-Use Easements page for more information.  

2012 Land Conservation (Williamson) Act Status Report

The 2012 Land Conservation (Williamson) Act Status Report is now available!   The purpose of these reports is to provide information to the Legislature and general public on the implementation of the Act by counties and cities.  Data is collected through the yearly Land Conservation Act and Open Space Subvention Act Survey.  Please see the Enrollment Statistics page for more information.

Guidance for Cancellation of Williamson Act Contracts

The Department has compiled a general cancellation outline and a Cancellation Petition Advice Paper to assist the public in understanding what is involved in the process of cancelling a contract and what materials might be necessary.  Please see the  Contract Cancellations page for further information.  

Guidance for the Public Acquisition of Williamson Act Land

When there is a need for a public agency or other eligible entity to acquire land enrolled in a Williamson Act contract, or located in an agricultural preserve, the Department of Conservation must be notified as set forth in Government Codes §51290 through §51295 and §51296. 

The Department has created a number of example documents that may be useful if you are compiling a public acquisition notice.  Please see the Public Acquisitions page for further information.

Working with the LESA Model

The Land Evaluation and Site Assessment (LESA) Model evaluates agricultural characteristics of specific sites, as indicated in California Environmental Quality Act (CEQA) guidelines.

Legislation and Policy

        Data and Maps