Parcel Maps in San Leandro, CA

San Leandro's flat postwar tracts are seeing steady SB 9 interest, and the terrain cooperates: level, regular lots where a ministerial urban lot split avoids the grading and access complications hillside cities face. The feasibility questions are the statutory ones — each resulting parcel must meet SB 9's minimum size and proportionality requirements, and the City's objective standards govern setbacks and configuration. Deeper tract lots sometimes support a conventional split with a flag-lot rear parcel instead, and we compare both routes against the zoning before recommending one. What makes San Leandro unusual for boundary work is the Hayward fault, which runs directly through the city with visible aseismic creep — offset curbs and cracked sidewalks mark its trace. Within the Alquist-Priolo Earthquake Fault Zone, new structures for human occupancy face setbacks from the fault, which can remove the second building site a split depends on; near the trace, decades of creep can also have carried fences and monuments off the record line, a discrepancy we resolve from recorded evidence and preserve under Business and Professions Code §8771 where monuments are affected.

All divisions run under the Subdivision Map Act: SB 9 splits through the City's ministerial process, other divisions of four or fewer lots by tentative parcel map with conditions of approval, and in every case a final map or document recorded with the Alameda County Recorder. West of I-880, mapped liquefaction zones can add geotechnical conditions, and the corridor's industrial-to-residential conversion sites often need merger or remnant-parcel cleanup before a new map can even be filed.

Our Trimble terrestrial laser scanner covers a tract lot in a single short mobilization — boundary evidence, structures, fences, and grades in one survey-grade point cloud — so the split exhibit and the topographic survey base come from one visit, with the offset curb lines near the fault captured at millimeter accuracy if the trace is nearby.