San Mateo AAC Tables After‑the‑Fact Request to Legalize 3‑story Shipping‑container Structure at 350 Madera Lane

San Mateo County’s Agricultural Advisory Committee on Jan. 13 reviewed an after‑the‑fact planned agricultural development (PAD) application for 350 Madera Lane in unincorporated San Gregorio and voted to table the matter pending additional information from county staff and state agencies.

The application, filed as PON202300112 by applicant Eric Markegaard, seeks to legalize a three‑story, approximately 2,299‑square‑foot shipping‑container storage structure, a pond and a 5,000‑gallon plastic water tank on a 25,253‑square‑foot parcel (APN 081‑320‑030). The proposal also references a separate 10,000‑gallon tank used for a fire water supply. County planner Sonal Agarwal told the committee that the project remains incomplete and is under active review by environmental health, geotechnical and drainage reviewers.

Why it matters: Neighbors and committee members raised water‑rights, public‑health and land‑use concerns that could affect adjacent agricultural operations if the county approves a legalization without resolving state water‑rights and code‑compliance issues. The committee requested follow‑up from planning staff before making a recommendation to the Planning Commission.

Public concerns and code issues

Neighbor Ronnie Cardoza, who lives immediately west of the parcel, said the property…