Parcel Maps in Alameda, CA

Alameda's flat terrain removes the grading obstacles that complicate hillside splits, which makes lot division here mostly a question of zoning math and boundary evidence. The island's large Victorian-era parcels — some deep enough to support a rear lot — and its stock of older narrow lots each raise different feasibility questions: minimum lot size, minimum frontage, and legal access for any new parcel. On a deep lot, a flag-lot configuration with a narrow access strip to the street is sometimes the only geometry that works, and whether the City's standards allow it is the first thing we check. SB 9 has added a ministerial path for urban lot splits in Alameda's single-family zones, and on the island's flat, regular lots it is often the most direct route to two parcels — subject to the statute's minimum parcel sizes and the City's objective standards.

The Subdivision Map Act governs either way: divisions of four or fewer lots proceed by parcel map, with a tentative map approved by the City subject to conditions, then a final parcel map examined and recorded with the Alameda County Recorder. Alameda's bay-fill margins and mapped liquefaction zones can surface geotechnical conditions of approval, and lagoon-area lots carry water-frontage boundary questions that deserve careful research. Original monuments on nineteenth-century blocks are frequently gone; where our retracement finds them disturbed or at risk, Business and Professions Code §8771 obligates their preservation, and we file the appropriate record.

Our Trimble terrestrial laser scanner captures the whole parcel — structures, fences, curbs, and grades — in one visit, giving the tentative map a survey-grade existing-conditions base and giving you a point cloud that also serves later design work. For division of former Naval Air Station ground at Alameda Point, larger-scale mapping rules apply and we scope those separately.