We’re San Mateo County’s chapter of YIMBY Action — local activists advocating for abundant housing at all income levels, stronger tenant protections, and better transit across the Peninsula.
This site hosts open-source data tools built by P4E volunteers. For campaigns, endorsements, and how to get involved, visit peninsulaforeveryone.org.
Projects
Peninsula Permit Tracker →
How long does your city take to approve housing? Peninsula jurisdictions ranked by a friction score combining RHNA progress, application-to-permit conversion rates, median approval timelines, and ADU statutory compliance under AB 68/881. Built on HCD Annual Progress Report data.
Enrollment vs. Housing →
K-12 enrollment in most San Mateo County districts peaked around 2015–2017 and has fallen since — including in the districts building the most units. A direct rebuttal to “new housing will overwhelm our schools.”
SB 79 Analysis →
Interactive map showing which parcels California SB 79 would upzone near high-quality transit, with potential housing capacity calculated by transit-proximity tier (200ft, ¼-mile, ½-mile). Currently scoped to Berkeley as a methodology proof.
Everything here is open source under the PeninsulaForEveryone GitHub organization. Issues and pull requests welcome.