Middletown's housing stock reflects both its rural roots and its post-wildfire rebuilding. The community mixes older single-family homes and ranch properties with newer construction that replaced homes lost in the 2015 Valley Fire. Lot sizes tend to be generous, and the surrounding hills and oak woodlands give many properties a country feel. As a small, unincorporated CDP, Middletown has no large tract developments; housing is a mix of custom homes, modest cottages, and larger parcels. The area appeals to retirees and Bay Area commuters seeking space at a distance from the region's urban core.

Middletown is a small community centered on its Highway 29 corridor, where shops, the post office, and civic buildings cluster, with residential streets and rural lanes radiating outward into oak-dotted hillsides. Nearby Hidden Valley Lake, a larger planned community with its own lake and recreational amenities, sits just to the northeast, while the hamlet of Cobb lies to the northwest in the mountains toward The Geysers. Together these communities form a loose network around Middletown's downtown core, sharing schools, services, and the Highway 29 corridor.

Life in Middletown is shaped by its rural Lake County setting and its position between two tourist destinations. Downtown is compact and low-key, with local cafés, markets, and services along Highway 29. Residents make short drives to Calistoga for wine tasting and hot springs or to Clear Lake for boating and fishing. The community has a strong small-town identity, reinforced by school events and the shared experience of rebuilding after the 2015 fire. A notable share of the population is made up of retirees, while others commute over the mountain to Napa Valley jobs.

Middletown Unified School District serves the community and the surrounding areas of Cobb and Hidden Valley Lake, providing K-12 education through elementary, middle, and high school campuses. Middletown High School anchors the district's secondary program. The district's small size fosters close ties between schools and families, and it functions as a community gathering point. Families moving to southern Lake County generally enroll through Middletown Unified, which draws students from across the mountain communities south of Clear Lake.

State Route 29 is Middletown's lifeline, running north toward Lower Lake, Kelseyville, and Lakeport and south over Mount St. Helena into Calistoga and the Napa Valley. The two-lane mountain highway is the primary route for commuting, commerce, and tourism through southern Lake County, and it can be heavily traveled during spring and summer. There is no rail or fixed-route transit serving the community, so residents depend on private vehicles. The climb over Mount St. Helena defines the daily commute for those working in Napa and Sonoma counties.

Outdoor recreation and nearby resorts define leisure around Middletown. Clear Lake, the largest natural freshwater lake wholly within California, lies a short drive north and offers boating, fishing, and lakeside recreation. Mount St. Helena rises to the south, with trails and sweeping views across Napa and Lake counties. Harbin Hot Springs, a long-established retreat set among the hills, draws visitors to the area's geothermal waters. To the south, Calistoga provides spas, mud baths, and wineries. The combination of lake, mountain, and hot springs gives Middletown outsized access to Northern California's recreational landscape.