Parcel Maps in Oakland, CA

Oakland has two very different subdivision markets. In the hills — Montclair, Rockridge, and the 1991 firestorm rebuild areas — large, irregular lots on steep terrain can sometimes support a split into two or more parcels, but feasibility is never automatic. Oakland's S-11 hillside overlay layers additional site-development standards onto the base zoning, and the Hayward fault's Alquist-Priolo Earthquake Fault Zone runs through the hills, restricting where new structures for human occupancy can sit relative to the fault trace. Before we draw a single lot line, we check the zoning district's minimum lot size, frontage, and access requirements against what the ground can actually deliver. On a downslope or upslope lot, a paper split that ignores driveway grades and buildable area is worthless.

For splits of four or fewer lots, the Subdivision Map Act prescribes the parcel map route: a tentative parcel map goes to the City for approval with conditions, and once those conditions are satisfied we prepare the final parcel map for examination and recordation with the Alameda County Recorder. Most Oakland tentative map submittals require a topographic base showing existing grades, trees, and improvements — and this is where our Trimble terrestrial laser scanner earns its keep. One mobilization captures the boundary evidence, the slope, the retaining walls, and the canopy in a survey-grade point cloud, so the tentative map exhibit and the boundary and topographic survey come from a single site visit instead of repeated trips up a steep driveway.

On flatter West Oakland blocks, SB 9 urban lot splits have opened a second path for single-family-zoned parcels, subject to the City's objective standards. We advise on which vehicle — SB 9 ministerial split, standard parcel map, or lot line adjustment — actually fits the property before you spend money on the wrong application.