The shape of Danville
Two things define cleaning here, and neither one is square footage. The first is trees. This town kept its valley oaks, and a house under a mature canopy gets catkins in spring, leaf litter through summer, acorns in fall and a steady fine debris on every horizontal surface near a door. The second is the Iron Horse Trail, which runs the length of the valley floor. Households backing onto it live half outdoors, and all of it comes in through one rear slider.
The building stock is genuinely mixed, which is unusual around these parts. Near the Museum of the San Ramon Valley there are cottages and small older houses with low ceilings and original hardwood. Greenbrook and Sycamore are 1960s-to-1980s tracts, ranch and two-story, well kept and heavily remodeled. The eastern end runs to large custom homes. Each gets quoted from its own room count instead of assuming the town has one shape.
The building stock here
Median local housing is a 2,000 to 2,900 square foot two-story from the sixties through the eighties, with a family room addition and a pool out back. Old Town homes are far smaller and full of original detail. Newer eastern houses are far larger. Common to all three: heavy tree cover, exterior doors that open straight into living space, and ground-floor hard flooring that shows organic debris within a day. Pools mean summer visits deal with wet footprints and chemical residue on the back rooms.