As-Built Surveys in San Leandro, CA

San Leandro sits directly on the Hayward fault, and the fault here does something unusual: it creeps. Offset curbs and sidewalks across the city visibly record slow, continuous ground movement, and buildings near the trace accumulate distortion year after year without a single dramatic event. For seismic-retrofit engineers, that makes trustworthy existing-conditions documentation essential — not the building as drawn in 1952, but the building as it stands after seventy years of creep and settlement. Our Trimble terrestrial laser scanner captures that reality in one visit: floor levels, wall plumbness, foundation geometry, and framing, resolved to millimeters across the whole structure and delivered as plans, sections, and elevations in DWG/DXF, Revit models at LOD 200 or 300, or E57/RCP point clouds.

The flat postwar tracts that make up most of San Leandro's housing were built quickly and altered often, so residential remodels and ADU projects here start from the same problem — no reliable drawings — at smaller scale, and a short scanning visit solves it economically. Meanwhile the city's industrial corridors are seeing warehouses and light-manufacturing buildings converted to residential and mixed use. These conversions lean hard on as-built data: column grids, clear heights, and roof structure drive unit layouts, and west of I-880, where mapped liquefaction zones underlie the old industrial land, scan-derived slab-elevation data shows structural engineers how much settlement has already occurred. Any element missed in scoping is pulled from the archived cloud later, without remobilizing to an occupied or secured building.

San Leandro is in Alameda County, so records of survey and maps connected to these projects are filed with the Alameda County Surveyor and Recorder — and where fault creep has displaced fences or survey monuments, restoration is governed by Business and Professions Code section 8771.