Parcel Maps in Vallejo, CA

Vallejo's Victorian districts — downtown and St. Vincent's Hill — hold some of the Bay Area's most character-rich small lots, and they generate steady lot line adjustment work. Narrow Victorian parcels were platted for a nineteenth-century city, and today's owners routinely need a few feet of a neighbor's side yard to legalize a garage, fit an addition, or resolve a fence line that has stood in the wrong place for generations. Under the Subdivision Map Act, an adjustment can move that line without creating a new parcel — but on lots this old, the survey behind it matters more than the paperwork. Original plat dimensions, chains of deeds, and long-standing occupation must be reconciled, surviving monuments recovered, and anything we disturb perpetuated under Business & Professions Code §8771, so the adjusted line is defensible at the next sale.

Mare Island frames the other end of Vallejo's mapping story. The West Coast's first naval shipyard is now a major adaptive-reuse district, and converting a former federal installation into private parcels is parcelization on a scale few cities ever see — dry docks, machine shops, and officers' quarters being fitted into a modern parcel fabric, often where original drawings are lost or incomplete. For owners and tenants on or near the island, that context raises practical questions we help answer: how a leasehold or parcel relates to the evolving record map, and how a proposed adjustment or division fits land that is still being remapped. Waterfront and fill areas here carry mapped liquefaction zones under the Seismic Hazards Mapping Act, which we flag during feasibility because they can shape conditions of approval.

Vallejo is in Solano County, so every parcel map and adjustment is examined by the Solano County Surveyor and recorded with the Solano County Recorder in Fairfield — a cycle we manage on every project. Our Trimble terrestrial laser scanner captures the boundary evidence and a survey-grade topographic base in one mobilization, which on a tight Victorian lot means the adjustment plat, the addition design, and the drainage plan all come from a single verifiable dataset. Where historic structures are involved, our as-built surveys extend that same scan data into the building itself.