What is MSCP and when does it affect my remodel?

The Multiple Species Conservation Program (MSCP) is a regional Habitat Conservation Plan covering roughly 900 square miles across San Diego County, jointly administered with the U.S. Fish and Wildlife Service under Section 10(a)(1)(B) of the federal Endangered Species Act and with the California Department of Fish and Wildlife under the Natural Community Conservation Planning Act (Fish and Game Code §2800 et seq.). Inside the City of San Diego it is implemented through the MSCP Subarea Plan, the Environmentally Sensitive Lands ordinance at SDMC §143.0101, and the Biology Guidelines published by Development Services.

MSCP review attaches when a parcel sits inside a Multi-Habitat Planning Area (MHPA), within 100 feet of an MHPA boundary, in a designated biological core area, or on a canyon rim adjacent to preserved habitat. Triggers include parcels in Carmel Valley, Black Mountain Ranch, Otay Mesa, Mission Trails fringe, Tierrasanta canyon-edge lots, and the rim parcels in Pacific Beach and La Jolla. A qualified biologist must prepare a Biological Resources Report following the City Biology Guidelines, identifying covered species (California gnatcatcher, San Diego fairy shrimp, Quino checkerspot butterfly), narrow endemics, and sensitive vegetation communities like coastal sage scrub or southern maritime chaparral.

If vernal pools are present or suspected, Vernal Pool Habitat Conservation Plan review under the City's adopted VPHCP layers on top, with USFWS coordination required for any unavoidable impacts to listed branchiopods. Construction noise abutting MHPA must observe a February 15 to August 31 breeding-season restriction for gnatcatcher, and grading is typically blocked or fenced during that window.

Most in-footprint interior remodels are exempt because they do not extend the building envelope or disturb native vegetation. Expansions, new ADUs sited toward a canyon edge, pool installations, and any grading into native habitat are not exempt and add 6 to 16 weeks for biology, plus mitigation costs that can range from $15,000 to $150,000 depending on impacted acreage and habitat tier.