| Ainsworth, Lewis, House | Orange | Building | 1981 |
| Anaheim Orange and Lemon Association Packing House | Anaheim | Building | 2015 |
| Artz Building | Tustin | Building | 1994 |
| Backs, Ferdinand, House | Anaheim | Building | 1980 |
| Balboa Inn | Newport Beach | Building | 1986 |
| Balboa Pavilion | Balboa | Building | 1984 |
| Bank of Balboa-Bank of America | Newport Beach | Building | 1986 |
| Beckman Instruments Inc. Administration Building | Fullerton | Building | 2017 |
| Bixby-Bryant Ranch House | Yorba Linda | Building | 1997 |
| Bradford, A. S., House | Placentia | Building | 1978 |
| Brea City Hall and Park | Brea | District | 1984 |
| Builders Exchange Building | Santa Ana | Building | 1982 |
| Carnegie Library | Anaheim | Building | 1979 |
| Casa de Esperanza | San Juan Capistrano | Building | 1990 |
| Casa Romantica | San Clemente | Building | 1991 |
| Chapman Building | Fullerton | Building | 1983 |
| Christ College Site | Irvine | Site | 1993 |
| Clark, Dr. George C., House | Fullerton | Building | 1976 |
| Congdon, Joel R., House | San Juan Capistrano | Building | 2002 |
| Consolidated Orange Growers Precooling & Ice Plant | Orange | Building | 2021 |
| Crystal Cove Historic District | Laguna Beach | District | 1979 |
| Culver, C. Z., House | Orange | Building | 1986 |
| Cypress Street Schoolhouse | Orange | Building | 2015 |
| Dewella Apartments | Fullerton | Building | 2009 |
| Downtown Santa Ana Historic Districts (North, Government/Institutional and South, Retail) | Santa Ana | District | 1984 |
| Easley, Oscar, Block | San Clemente | Building | 1983 |
| Ebell Society of Santa Ana Valley | Santa Ana | Building | 2001 |
| Egan, Richard, House | San Juan Capistrano | Building | 2017 |
| ELECTRA (motor yacht) | Huntington Beach | Structure | 2023 |
| Elephant Packing House | Fullerton | Building | 1983 |
| Esslinger Building | San Juan Capistrano | Building | 1988 |
| Fairview Indian Site | Costa Mesa | Site | 1972 |
| Farmers and Merchants Bank of Fullerton | Fullerton | Building | 1994 |
| Fender's Radio Service | Fullerton | Building | 2013 |
| First Baptist Church of Orange | Orange | Building | 1996 |
| Floral Park Historic District | Santa Ana | District | 2023 |
| Forster, Frank A., House | San Juan Capistrano | Building | 1986 |
| Fox Fullerton Theatre Complex | Fullerton | District | 2006 |
| Frances Packing House | Irvine | Building | 1977 |
| French Park Historic District | Santa Ana | District | 1999 |
| Fullerton City Hall | Fullerton | Building | 2003 |
| Fullerton College Historic District | Fullerton | District | 2023 |
| Fullerton First Methodist Episcopal Church | Fullerton | Building | 2001 |
| Fullerton Odd Fellows Temple | Fullerton | Building | 2002 |
| Fullerton Post Office | Fullerton | Building | 2012 |
| Fullerton Union High School Auditorium (Additional Documentation) | Fullerton | Building | 1993 |
| Fullerton Union Pacific Depot | Fullerton | Building | 1983 |
| Goldschmidt House | San Clemente | Building | 2004 |
| Greystone Villa-Cabin 18 | Cleveland National Forest | Building | 2002 |
| Griffith, Edward and America, House | Laguna Beach | Building | 2021 |
| Hansen, George, House | Anaheim | Building | 2013 |
| Harmon-McNeil House | Santa Ana | Building | 1985 |
| Harrison House | San Juan Capistrano | Building | 1979 |
| Helme-Worthy Store and Residence | Huntington Beach | Building | 1987 |
| Hetebrink House | Fullerton | Building | 1993 |
| Hewes, David, House | Tustin | Building | 2017 |
| Hillcrest Park | Fullerton | District | 2004 |
| Hotel San Clemente | San Clemente | Building | 1989 |
| Howe-Waffle House and Carriage House | Santa Ana | Building | 1977 |
| Hunt Center and Library | Fullerton | District | 2019 |
| Huntington Beach Elementary School Gymnasium and Plunge | Huntington Beach | Building | 1994 |
| Huntington Beach Municipal Pier | Huntington Beach | District | 1989 |
| Huntington Beach Public Library on Triangle Park | Huntington Beach | Building | 2013 |
| Irvine Bean and Growers Association Building | Irvine | Building | 1986 |
| Irvine Blacksmith Shop | Irvine | Building | 1986 |
| Irvine Park | Orange | Site | 1983 |
| Johnson, Hugh Edgar, House | Fullerton | Building | 2021 |
| Key, George, Ranch | Placentia | District | 1975 |
| Killefer, Lydia D., School | Orange | Building | 2015 |
| Kraemer, Samuel, Building (American Savings Bank/First National Bank) | Anaheim | Building | 1983 |
| Kroger-Melrose District | Anaheim | District | 1985 |
| Lighter-than-Air Ship Hangars | Santa Ana | Structure | 1975 |
| Los Rios Street Historic District | San Juan Capistrano | District | 1983 |
| Lovell Beach House | Newport Beach | Building | 1974 |
| Mariona | Laguna Beach | Building | 1984 |
| Masonic Temple | Fullerton | Building | 1995 |
| Melrose-Backs Neighborhood Houses | Anaheim | Building | 1986 |
| Minter, George W., House | Santa Ana | Building | 1980 |
| Mission San Juan Capistrano | San Juan Capistrano | Building | 1971 |
| Modjeska House NHL | Modjeska | Building | 1972 |
| Montanez Adobe | San Juan Capistrano | Building | 1975 |
| Muckenthaler House | Fullerton | Building | 1980 |
| New Lynn Theater | Laguna Beach | Building | 2023 |
| Newland House | Huntington Beach | Building | 1985 |
| Nixon, Richard, Birthplace NHL | Yorba Linda | Building | 1971 |
| North Beach Historic District | San Clemente | District | 2020 |
| Odd Fellows Hall | Santa Ana | Building | 1983 |
| Old Backs House | Anaheim | Building | 1980 |
| Old Towne Orange Historic District | Orange | District | 1997 |
| Olive Civic Center | Orange | Building | 1993 |
| Orange County Courthouse | Santa Ana | Building | 1977 |
| Orange Intermediate School-Central Grammar School | Orange | Building | 1993 |
| Orange Union High School | Orange | Building | 1975 |
| Pacific Electric Railway Company Depot | Yorba Linda | Building | 1979 |
| Pacific Electric Sub-Station No. 14 | Santa Ana | Building | 1983 |
| Parker House | Orange | Building | 1989 |
| Parra, Miguel, Adobe | San Juan Capistrano | Building | 1978 |
| Pickwick Hotel | Anaheim | Building | 1979 |
| Pierotti, Attlio and Jane, House | Fullerton | Building | 1993 |
| Plaza Historic District | Orange | District | 1982 |
| Plaza, The | Orange | Site | 1978 |
| Pomona Court and Apartments | Fullerton | District | 2017 |
| Porter-French House | Orange | Building | 1994 |
| Rankin Building | Santa Ana | Building | 1983 |
| San Clemente Beach Club | San Clemente | Building | 1981 |
| Santa Ana City Hall | Santa Ana | Building | 1982 |
| Santa Ana Fire Station Headquarters No. 1 | Santa Ana | Building | 1986 |
| Santa Fe Railway Passenger and Freight Depot | Fullerton | Building | 1992 |
| Santiago Orange Growers Association Packing House | Orange | Building | 2022 |
| Santora Building | Santa Ana | Building | 1982 |
| Seal Beach City Hall | Seal Beach | Building | 1983 |
| Serrano, Jose, Adobe | El Toro | Building | 1976 |
| Smith and Clark Brothers Ranch and Grounds | Villa Park | Building | 1983 |
| Smith-Tuthill Funeral Parlors | Santa Ana | Building | 1978 |
| Southern Counties Gas Co. | Santa Ana | Building | 1983 |
| Spurgeon Block | Santa Ana | Building | 1979 |
| St. Francis by-the-Sea American Catholic Church | Laguna Beach | Building | 1988 |
| St. Isidore Catholic Church | Los Alamitos | Building | 2022 |
| St. John's Lutheran Church | Orange | Building | 1991 |
| St. Michael's Episcopal Church | Anaheim | Building | 2004 |
| Stanton, Phillip Ackley, House | Anaheim | Building | 1980 |
| Stevens, Sherman, House | Tustin | Building | 1984 |
| Stroschein, Carl, House | San Juan Capistrano | Building | 2009 |
| Truxaw-Gervais House | Anaheim | Building | 1982 |
| US Post Office Station-Spurgeon Station | Santa Ana | Building | 1985 |
| Villa Park School | Villa Park | Building | 2003 |
| VIRGINIA (sloop) | Dana Point | Structure | 1991 |
| Walkers Orange County Theater | Santa Ana | Building | 1982 |
| WILD GOOSE (yacht) | Newport Beach | Structure | 2011 |
| Williams, Roger Y., House | San Juan Capistrano | Building | 2007 |
| Woelke, John, House | Anaheim | Building | 2013 |
| Wright, George L., House | Santa Ana | Building | 1982 |
| Yorba, Domingo Adobe and Casa Manuel Garcia | San Juan Capistrano | Building | 1982 |
| Yost Theater-Ritz Hotel | Santa Ana | Building | 1986 |
| Young Men's Christian Association-Santa Ana-Tustin Chapter | Santa Ana | Building | 1993 |
Modjeska House NHL Modjeska · Building · listed 1972 
Nixon, Richard, Birthplace NHL Yorba Linda · Building · listed 1971 
Ainsworth, Lewis, House Orange · Building · listed 1981 
Artz Building Tustin · Building · listed 1994 
Backs, Ferdinand, House Anaheim · Building · listed 1980 
Balboa Inn Newport Beach · Building · listed 1986 
Balboa Pavilion Balboa · Building · listed 1984 
Bradford, A. S., House Placentia · Building · listed 1978 
Brea City Hall and Park Brea · District · listed 1984 
Builders Exchange Building Santa Ana · Building · listed 1982