| Adam-Derby House | Oyster Bay | Building | 1979 |
| Aldred, John E., Estate | Lattingtown | Building | 1979 |
| Barkin House | Long Beach | Building | 2015 |
| Barstow, William, Mansion | Kings Point | Building | 2014 |
| Beekman, James William, House | Oyster Bay | Building | 1973 |
| Bellarose Village Municipal Complex | Bellerose | District | 2006 |
| Building at 390 Ocean Avenue | Massapequa | Building | 2017 |
| Cedarmere-Clayton Estates | Roslyn Harbor | District | 1986 |
| Central Hall | Sea Cliff | Building | 1988 |
| Christ Building | Sea Cliff | Building | 2012 |
| Christ Church | Oyster Bay | District | 2018 |
| Church of Our Lady of Kazan | Sea Cliff | District | 2016 |
| Clapham-Stern House | Roslyn Harbor | Building | 2005 |
| Clifton | Roslyn Harbor | Building | 1999 |
| Cobble Villa | Long Beach | Building | 2015 |
| Cock-Cornelius House | Locust Valley | Building | 2006 |
| Cold Spring Harbor Laboratory Historic District | Laurel Hollow | District | 1994 |
| Cornell-Van Nostrand House | New Hyde Park | Building | 2007 |
| Crowell House | Sea Cliff | Building | 1988 |
| Denton Homestead | East Rockaway | Building | 2014 |
| Denton, George W., House | Flower Hill | Building | 1985 |
| Dodge, Lillian Sefton, Estate | Mill Neck | Building | 1979 |
| Dodge, Thomas, Homestead | Port Washington | Building | 1986 |
| DuPont-Guest Estate | Brookville | Building | 2009 |
| East Williston Village Historic District | East Williston | District | 1985 |
| Eastman Cottage | Roslyn | Building | 1986 |
| Elmwood | Oyster Bay | Building | 1975 |
| Execution Rocks Light Station | Port Washington | Structure | 2007 |
| Felix, Pauline, House | Long Beach | Building | 2005 |
| First Presbyterian Church of Oyster Bay | Oyster Bay | Building | 1976 |
| Fort Massapeag Archeological Site NHL | Oyster Bay | Site | 1993 |
| Franklin Square National Bank | Franklin Square | Building | 2015 |
| Glen Cove Post Office | Glen Cove | Building | 2010 |
| Goodyear, A. Conger, House | Old Westbury | Building | 2003 |
| Gould-Guggenheim Estate | Port Washington | District | 2006 |
| Grace and Thomaston Buildings (Additional Documentation) | Great Neck Plaza | Building | 1978 |
| Grace Church Complex | Massapequa | Building | 1983 |
| Granada Towers | Long Beach | Building | 1984 |
| Greenridge-Arthur Williams House | Roslyn Harbor | Building | 1999 |
| Harding, Stephen, House | Sea Cliff | Building | 2011 |
| Haviland-Davison Grist Mill | East Rockaway | Building | 1998 |
| Heitz Place Courthouse | Hicksville | Building | 1974 |
| Hempstead Town hall | Hempstead | Building | 2018 |
| Hicks Lumber Company Store | Roslyn | Building | 1986 |
| House at 103 Roslyn Avenue | Sea Cliff | Building | 1988 |
| House at 112 Sea Cliff Avenue | Sea Cliff | Building | 1988 |
| House at 115 Central Avenue | Sea Cliff | Building | 1988 |
| House at 137 Prospect Avenue | Sea Cliff | Building | 1988 |
| House at 173 Sixteenth Avenue | Sea Cliff | Building | 1988 |
| House at 176 Prospect Avenue | Sea Cliff | Building | 1988 |
| House at 18 Seventeenth Avenue | Sea Cliff | Building | 1988 |
| House at 19 Locust Place | Sea Cliff | Building | 1988 |
| House at 195 Prospect Avenue | Sea Cliff | Building | 1988 |
| House at 199 Prospect Avenue | Sea Cliff | Building | 1988 |
| House at 207 Carpenter Avenue | Sea Cliff | Building | 1988 |
| House at 226 West Penn Street | Long Beach | Building | 2008 |
| House at 240 Sea Cliff Avenue | Sea Cliff | Building | 1988 |
| House at 251 Rocklyn Avenue | Lynbrook | Building | 2008 |
| House at 285 Glen Avenue | Sea Cliff | Building | |
| House at 285 Sea Cliff Avenue | Sea Cliff | Building | 1988 |
| House at 290 Eighth Avenue | Sea Cliff | Building | |
| House at 332 Franklin Avenue | Sea Cliff | Building | 1988 |
| House at 362 Sea Cliff Avenue | Sea Cliff | Building | 1988 |
| House at 378 Glen Avenue | Sea Cliff | Building | 1988 |
| House at 474 Ocean Avenue | Lynbrook | Building | 2008 |
| House at 52 Eighteenth Avenue | Sea Cliff | Building | 1988 |
| House at 52 Frost Mill Road | Mill Neck | Building | 2011 |
| House at 65 Twentieth Avenue | Sea Cliff | Building | 1988 |
| House at 73 Grove Street | Lynbrook | Building | 2008 |
| House at 9 Locust Place | Sea Cliff | Building | 1988 |
| Jackson, John II, House | Wantagh | Building | 2022 |
| Jackson, Samuel and Elbert, House | Wantagh | Building | 2006 |
| Jericho Friends Meeting House Complex | Jericho | Building | 2002 |
| Jerusalem District No. 5 Schoolhouse | Levittown | Building | 1996 |
| Jones Beach State Park, Causeway and Parkway System | Wantagh | District | 2005 |
| Justice Court Building | Glen Cove | Building | 1990 |
| Kellogg, George Sumner, House | Baldwin | Building | 2017 |
| Landsberg, William, House | Port Washington | Building | 2014 |
| Long Island Rail Road Station at Farmingdale | Farmingdale | Building | 1991 |
| Lynbrook Public Library | Lynbrook | Building | 2025 |
| Mackay Estate Dairyman's Cottage | East Hills | Building | 1991 |
| Mackay Estate Gate Lodge | East Hills | Building | 1991 |
| Mackay Estate Water Tower | East Hills | Building | 1991 |
| Main Street Historic District | Roslyn | District | 1974 |
| Main Street School | Port Washington | Building | 1983 |
| Manhasset Monthly Meeting of the Society of Friends | Manhasset | Building | 2009 |
| Matinecock Friends Meetinghouse | Locust Valley | Building | 1976 |
| Mitchel Air Base and Flight Line | Uniondale | District | 2018 |
| Monfort Cemetery | Port Washington | Site | 1988 |
| Moore, Benjamin, Estate | Muttontown | Building | 1979 |
| Moore's Building | Oyster Bay | Building | 1996 |
| Mudge Farmhouse | Roslyn Harbor | Building | 1999 |
| Nassau County Courthouse | Mineola | Building | 2021 |
| North Hempstead Town Hall | Manhasset | Building | 2006 |
| Old Nassau County Courthouse | Garden City | Building | 1978 |
| Old Westbury Gardens | Westbury | Building | 1976 |
| Old Westbury Gardens-Phipps, John S., Estate (Boundary Increase) | Old Westbury | District | 2011 |
| Onderdonk, Horatio Gates, House | Manhasset | Building | 1980 |
| Oyster Bay Long Island Rail Road Station | Oyster Bay | Building | 2005 |
| Oyster Bay Long Island Rail Road Turntable | Oyster Bay | Structure | 2005 |
| Pagan-Fletcher House | Valley Stream | Building | 1983 |
| Pine Hollow Cemetery | Oyster Bay | Site | 2018 |
| Planting Fields Arboretum | Oyster Bay | Building | 1979 |
| Raynham Hall | Oyster Bay | Building | 1974 |
| Rectory of St. George's Episcopal Church | Hempstead | Building | 1988 |
| Rescue Hook & Ladder Company No. 1 Firehouse | Roslyn | Building | 1991 |
| Rock Hall | Lawrence | Building | 1976 |
| Rockville Cemetery and Bristol and Mexico Monument | Lynbrook | Site | 2015 |
| Roosevelt, James Alfred, Estate | Cove Neck | Building | 1979 |
| Roslyn Cemetery | Roslyn | Site | 1991 |
| Roslyn Grist Mill | Roslyn | Building | 1986 |
| Roslyn House | Roslyn Heights | Building | 1990 |
| Roslyn National Bank and Trust Company Building | Roslyn | Building | 1986 |
| Roslyn Savings Bank Building | Roslyn | Building | 1986 |
| Roslyn Village Historic District | Roslyn | District | 1987 |
| Saddle Rock Grist Mill | North Hempstead | Building | 1978 |
| Sagamore Hill National Historic Site | Oyster Bay | Building | 1966 |
| Saint Mary's Chapel | Carle Place | Building | 2005 |
| Sands Family Cemetery | Sands Point | Site | 1992 |
| Sands-Willets Homestead | Port Washington | Building | 1985 |
| Schenck-Mann House | Syosset | Building | 2005 |
| Schmidlapp-Humes Estate Historic District | Locust Valley | District | 2020 |
| Sea Cliff Firehouse | Sea Cliff | Building | 2003 |
| Sea Cliff Railroad Station | Glen Cove | Building | 1988 |
| Sea Cliff Village Hall, Library and Museum Complex | Sea Cliff | Building | 2005 |
| Seawanhaka Corinthian Yacht Club | Oyster Bay | Building | 1974 |
| Shell House, The | Glen Cove | Building | 1988 |
| Smith, Almeron and Olive, House | Plandome | Building | 2006 |
| Smith, Stephen and Charles, House | Roslyn Harbor | Building | 1999 |
| Sousa, John Philip, House NHL | Port Washington | Building | 1966 |
| Springbank | Roslyn Harbor | Building | 1999 |
| St. George's Church | Hempstead | Building | 1973 |
| St. Lukes Protestant Episcopal Church | Sea Cliff | Building | 1988 |
| St. Paul's German Presbyterian Church and Cemetery | Elmont | Building | 2008 |
| Stepping Stones Light Station | Kings Point | Building | 2005 |
| Stewart, A. T., Era Buildings | Garden City | District | 1978 |
| Swan, Edward H., House | Oyster Bay | Building | 1976 |
| Titus, Willet, House | Roslyn | Building | 1986 |
| Toll Gate House | Greenvale | Building | 1977 |
| Trinity Church Complex | Roslyn | Building | 1986 |
| Underhill, George, House | Locust Valley | Building | 2003 |
| United Stated Merchant Marine Academy | Kings Point | District | 2014 |
| US Post Office-Freeport | Freeport | Building | 1989 |
| US Post Office-Garden City | Garden City | Building | 1989 |
| US Post Office-Glen Cove | Glen Cove | Building | 1989 |
| US Post Office-Great Neck | Great Neck Plaza | Building | 1989 |
| US Post Office-Hempstead | Hempstead | Building | 1988 |
| US Post Office-Long Beach | Long Beach | Building | 1989 |
| US Post Office-Mineola | Mineola | Building | 1989 |
| US Post Office-Oyster Bay | Oyster Bay | Building | 1989 |
| US Post Office-Rockville Centre | Rockville Centre | Building | 1989 |
| Vaisberg, Samuel, House | Long Beach | Building | 2005 |
| Valley Road Historic District | Manhasset | District | 1977 |
| Wantagh Railroad Complex | Wantagh | Building | 1983 |
| Warner, Samuel Adams, House | Roslyn | Building | 1986 |
| Willowmere | Roslyn Harbor | Building | 1999 |
| Woolworth Estate | Glen Cove | Building | 1979 |