The League seeks to preserve Sonoma’s historic structures through six main activities

  • The League’s Sonoma/Valley of the Moon Historic Survey, begun in 1977 and updated several times since, covers nearly all local structures 50 years old and older. It is now accessible online through this website for easy reference.
  • The League’s Archive, with its collection of maps, documents, news clippings and photographs, is maintained in Maysonnave House.
  • The League’s Advocacy Program protects historic Sonoma structures from demolition or significant change through neglect or redevelopment.                                                   
  • The League’s Awards Programs through which it recognizes leaders in local historic preservation efforts in both public and private activities.
  • The League’s Sonoma Walking Tour Brochure highlighting historic commercial and private properties on and around the Plaza for residents and visitors to find and appreciate our preserved heritage.
  • The League’s Historic Facade Easement Program by which the League protects the exterior of iconic buildings around the Plaza through deeded rights under California law.



Upcoming Events


After years of work, our Historical Resources database is now online. The Preservation Guidelines are available on this site. 

Address & Map


291 First Street East

Sonoma, CA 95476

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