Council partially grants appeal on Landmarks’ amplified‑music request; requires third‑party sound monitoring plan

The Town Council on May 21 partially granted an appeal filed by neighbors of the Belvedere‑Tiburon Landmarks Society’s Art & Garden Center and amended the Planning Commission’s recent approval of limited amplified music by adding clearer third‑party monitoring requirements.

The Planning Commission had earlier approved allowing moderate amplification for outdoor events at the Landmarks Art & Garden Center, conditioned on a 60‑decibel limit measured at property lines, on‑site monitoring at every event, an 8:30 p.m. music curfew and vendor/guest removal times, and a mandatory status report and a full review within nine months.

Neighbors appealed, saying the Planning Commission relied on an incomplete sound study, failed to limit the number and frequency of amplified events, and did not adequately address crowd noise, parking, late‑night impacts and rodent control. Neighbors presented short‑term decibel readings from two wedding events showing readings above 60 dB at times and raised concerns about blocked sight lines, curbside parking on narrow local streets and the cumulative impact of frequent events.

Landmarks representatives said amplified music has been used at weddings for decades; the 1997 CUP restricting amplification had been overlooked and staff and the society moved quickly to ask for a formal amendment. Landmarks said amplified audio is essential for outdoor ceremonies and receptions, noted the organization’s public‑benefit mission and the revenue the venue generates to maintain several historic properties. Landmarks submitted simulated sound tests and offered on‑site monitoring and additional contract language to require DJs to aim speakers toward Richardson Bay and to coordinate with on‑site docents.

After extended public comment from residents, Landmarks volunteers and preservation advocates, the council partially granted the appeal on a narrow point: it accepted the Planning Commission’s approach but directed that the sound‑monitoring plan required by the commission must be objectively measured and must incorporate third‑party monitoring or an agreed, continuous recording method so that traffic noise can be separated from event noise and the results be verifiable by staff and the public. The council asked staff to return with a draft condition specifying monitoring standards and a process for third‑party verification to be in place before a full slate of 2026 bookings is permitted. The council also encouraged the parties to meet in the weeks ahead and to present any negotiated agreements to staff for inclusion with the formal monitoring plan.

The council’s vote to partially grant the appeal and require an objective third‑party monitoring plan was unanimous. Council members noted the difficulty of balancing a nonprofit’s fundraising needs with neighbors’ rights to quiet enjoyment; they instructed staff and the Planning Commission to review the monitoring data after the summer season and consider further modifications in November.