The I.O.O.F. Building, Mason Valley, located at 1 S. Main St. in Yerington, Nevada, is a building designed by prominent Nevada architect Frederick J. DeLongchamps that was built in 1913–14. It was listed on the National Register of Historic Places in 1983.[1]
I.O.O.F. Building, Mason Valley | |
   | |
| Location | 1 S. Main St., Yerington, Nevada |
|---|---|
| Coordinates | 38°59′2″N 119°10′11″W / 38.98389°N 119.16972°W |
| Area | less than one acre |
| Built | 1913-14 |
| Architect | DeLongchamps, Frederick J. |
| NRHP reference No. | 83001111[1] |
| Added to NRHP | August 4, 1983 |
It was deemed significant for its association with the community development of Yerington, in which the International Order of Odd Fellows group played a role, and for being designed by DeLongchamps.[2]