Black Diamond's housing stock reflects its two distinct eras. The older core near the historic town site holds modest, mid-century and earlier single-family homes on established streets, while newer growth has concentrated in the Ten Trails master-planned community east of downtown, where homes built since the 2010s line tree-lined sidewalks with parks and trail connections. Additional suburban subdivisions built from the 1980s onward ring the older center, and lakefront and larger-lot properties near Lake Sawyer add variety. The city's blend of historic character and newer planned development gives buyers a range of housing ages and neighborhood styles.

Black Diamond's residential areas divide between the historic town site near the museum and depot and the newer planned communities to the east. Ten Trails is the city's signature master-planned neighborhood, built around a village-center concept with parks, trails, and tree-lined streets. Older subdivisions from the 1980s through the 2000s occupy the western and southern parts of the city, while properties near Lake Sawyer include lakefront homes and larger lots. The Black Diamond Historical Society and museum anchor the downtown, preserving the coal-mining heritage that still defines the city's identity.

Black Diamond combines small-town heritage with access to outdoor recreation and regional employment. The Black Diamond Historical Society and Museum celebrate the city's coal-mining past, and community events at the historic depot and downtown keep that history present. Residents have direct access to Lake Sawyer for boating, swimming, and fishing, plus the trails of Lake Sawyer Regional Park. The city's position in the Cascade foothills places hiking and mountain biking close at hand, while shopping and dining in nearby Maple Valley and Covington supplement the city's own commercial offerings.

Black Diamond is served by the Enumclaw School District, a South King County district that serves Enumclaw, Black Diamond, Ravensdale, and surrounding unincorporated areas. Black Diamond Elementary School is located in the city on Baker Street, and students continue to middle and high schools in Enumclaw. The district's small, community-oriented scale and its connection to the foothill towns of southeast King County are notable features for families considering the area.

Black Diamond sits southeast of Seattle at the edge of the metropolitan commute. State Route 169, the Maple Valley Highway, links the city to Maple Valley and Renton, while Highway 18 provides routes toward Interstate 90 and the Puget Sound corridor to the north. Commuters to Seattle, Bellevue, and Eastside employment centers typically travel through Maple Valley or via Highway 18. The city's foothill setting means most residents rely on personal vehicles, with park-and-ride and transit options available in nearby Maple Valley and Covington.

Lake Sawyer, one of King County's larger natural lakes, is the centerpiece of Black Diamond's outdoor life, offering swimming, boating, and fishing. Lake Sawyer Regional Park provides a network of walking and mountain-biking trails around the lake, maintained for both recreation and habitat restoration. The city's parks department oversees additional neighborhood parks, and the Cascade foothills and Green River valley offer hiking opportunities within a short drive. The Black Diamond Historical Society and museum add a cultural dimension to the city's recreational and community offerings.