Condo Conversions in Orinda, CA

Orinda’s housing stock is almost entirely single-family — semi-rural lots on winding roads — so we’ll say plainly that existing-building condominium conversions here are rare. Where condominium mapping genuinely comes up in Orinda is in the small downtown, split by Highway 24 and BART into its two villages, where infill and town-center projects near transit are the realistic candidates for attached housing. Whether the project is a conversion of an existing small building or a new-construction condominium, the legal mechanics are the same: a subdivision map processed under the Subdivision Map Act through the city and Contra Costa County, and a condominium plan under the Davis-Stirling Common Interest Development Act that defines the three-dimensional units, the common area, and exclusive-use areas like decks, patios, and assigned parking.

Orinda adds a consideration most flatland cities never face: the ground itself. The town lends its name to the Orinda Formation, a weak siltstone and claystone unit that hosts slow-moving landslides across the area, and many building sites are cut-slope lots graded for mid-century subdivisions. For a condominium plan tied to an existing structure, that history matters — buildings on creeping or settling ground drift out of plumb, and unit boundaries defined by walls and floors have to reflect where those surfaces actually are. Our Trimble terrestrial laser scanner captures the full structure in one visit at millimeter-level accuracy, giving us floor elevations, wall planes, and ceiling heights as a measured point cloud rather than a chain of hand measurements, and giving the project a scan-based as-built that architects and attorneys can rely on.

All maps and condominium plans for Orinda record with the Contra Costa County recorder after review by the county surveyor’s office, and we manage that map-check correspondence as part of the work. We also resolve the underlying boundary — which on Orinda’s large, older lots frequently means recovering monuments that predate the subdivision era — so the airspace units sit on a defensible land base.