Single-family ranches beside townhome clusters near the light-rail station — the HOA boundary is the story.
The single-family stock runs on the mid-century set: galvanized and copper supply lines, cast-iron drains and clay laterals, with full basements under the ranches and partial basements under the split-levels. The townhome and condo clusters run on PEX and PVC in later builds, on slab or podium foundations. The two stocks sit side by side, and the pipe answer flips between them.
The defining question is responsibility. In the multi-family clusters, common stacks and shared lines sit on one side of an HOA boundary and the unit's own plumbing on the other, so the first step on a townhome call is establishing whose line the problem is in. The standalone ranches beside them are ordinary phased-repipe jobs. The HOA-boundary question, not the pipe age, is what makes Southmoor Park different from the other southeast 1950s neighborhoods.