Parcel Maps in Piedmont, CA

Piedmont deserves a candid assessment up front: this small enclave city has some of the strictest design review in the East Bay, few remaining subdividable parcels, and a planning process that examines land-division proposals closely. Some of Piedmont's older estate properties do sit on hillside lots large enough that a division into two parcels is worth investigating — but we tell clients honestly that feasibility here is a genuine question, not a formality. The analysis starts with the zoning district's minimum lot size, frontage, and access standards, then moves to the practical constraints: slope, driveway grades, and whether a second building site actually exists once setbacks are applied. SB 9's ministerial lot-split provisions apply in single-family zones statewide, Piedmont included, though the statutory minimums and the City's objective standards still control what a given parcel can yield.

Where a division or a lot line adjustment does pencil, the Subdivision Map Act governs the process: a tentative parcel map approved with conditions, then a final map examined and recorded with the Alameda County Recorder. Piedmont's estate lots carry their own fieldwork challenges — mature trees and dense landscaping that block conventional line-of-sight measurements, old garden walls and hedges that have long stood in for the true boundary. Our Trimble terrestrial laser scanner works through these conditions well: from a handful of setups, it captures the terrain, canopy, walls, and structures in a survey-grade point cloud, so the boundary resolution and the topographic base for the tentative map come from one mobilization rather than repeated visits through someone's garden.

Even when a full split does not pencil, a lot line adjustment between neighboring owners — moving a shared boundary to match a driveway, wall, or landscaped area — is often achievable and records far more simply than a map.