Emerald Lake Hills

Living in Emerald Lake Hills

Emerald Lake Hills is an unincorporated community in San Mateo County, occupying the oak-and-chaparral hillside above Redwood City and below the Woodside plateau. It sits between the better-known Emerald Hills district to the south and the Farm Hill estates to the north, sharing the 94062 zip code and a distinctly more rural sensibility than either of the flatland Redwood City neighborhoods below.

The community takes its name from a small reservoir — Emerald Lake — that sits in the canyon at the community's center. The lake is private and visible only from certain upper lots, but its presence defines the hydrology of the neighborhood: seasonal creeks and intermittent drainages run through the canyon draws, sustaining a riparian character — willows, alders, coast live oaks — that contrasts sharply with the chaparral on the exposed south-facing ridges.

Lots in Emerald Lake Hills average 0.5–1.5 acres, substantially larger than anything available in flat Redwood City neighborhoods. The housing stock spans original 1950s ranch compounds on larger parcels that have remained in single-family ownership for decades, through mid-century contemporaries remodeled in the 1980s and 1990s, to a smaller number of newer custom homes built on infill parcels or as complete teardowns. The density is low by Peninsula standards — typical road segments have 8–15 homes per quarter mile rather than the 20–30 that characterize suburban Redwood City flatland.

Because it is unincorporated, Emerald Lake Hills is governed by San Mateo County rather than the City of Redwood City. This matters for development: permits go through the County Community Development Department, which applies County standards rather than Redwood City's more urban-scale code. For buyers planning additions, ADUs, or rural outbuildings (horse facilities exist on some of the larger parcels), understanding the County versus City development framework is important.

The school pathway is Redwood City Elementary School District for K–8 (most students attend Fair Oaks or Roy Cloud, depending on exact address), followed by Woodside High School under the Sequoia Union High School District. Woodside High draws from Woodside, Redwood City's hillside communities, and parts of Portola Valley, giving it a distinctive mix of tech-family, old-money rural, and established professional demographics.

Edgewood Park and Natural Preserve — more than 1,000 acres of County open space immediately adjacent to the neighborhood — provides Emerald Lake Hills residents with trail access rivaling anything you'd find in Marin or the Santa Cruz Mountains. The Franciscan Loop and Ridgeview Loop trails start within a 10-minute walk from many addresses.