The Truckee Meadows is a valley floor ringed by foothills, and the two behave differently. On the flat, most of the post-1970s subdivision building went up slab-on-grade, so a good number of houses have no basement at all. On the slopes west and south of Reno, grade change means daylight and walkout basements are often part of the original design, which usually makes them easier and cheaper to finish.
Then there are the specifics. Lemmon Valley sits beside Swan Lake and part of it is mapped floodplain. Damonte Ranch was built over ranch land with wetlands delineations. The Virginia City Highlands are on wells at nearly 6,000 feet and in a different county. Incline Village is at 6,350 feet with roughly three times the annual precipitation of Sparks and an extra regulatory layer at the lake.
Each page below goes into what that means for a basement in that particular place.