Kentfield and Greenbrae Share a ZIP Code. Their Home Prices Do Not.

Type 94904 into a national listing site and you'll get everything from a two-bedroom condo near Bon Air priced under $700,000 to a Kent Woodlands estate on five wooded acres well past $4 million. Same three digits. Same search results page. Two markets that have almost nothing in common once you look past the mailing address.

Buyers relocating to central Marin often start here, filtering by ZIP because that's what the search box asks for, then wondering why the "average price for 94904" they saw online has no relationship to the home they're actually touring. The confusion isn't a glitch. It's the predictable result of two distinct, unincorporated Marin communities, Kentfield and Greenbrae, sharing a postal boundary that has nothing to do with how either one prices.

One ZIP, Two Places That Don't Behave the Same

Neither Kentfield nor Greenbrae has a city hall. Both are unincorporated pockets of Marin County, which means planning and permits route through county government rather than a mayor's office. That shared administrative status is about the only thing the two communities have in common.

Kentfield's identity splits into two halves. Kent Woodlands, the wooded estate enclave on the lower slopes of Mount Tamalpais, is governed by county planning plus a second layer of design review from the Kent Woodlands Property Owners Association, a body that oversees roughly 570 residential lots ranging from half an acre to five acres. Below the Woodlands sit the Kentfield flats, the walkable blocks around College of Marin, Bacich Elementary, and Kent Middle School, where Corte Madera Creek's flood-control channel runs out near the campus. Woodlands Market and the Half Day Café anchor the daily rhythm down there. Up on the mountain, the anchor is the Crown Road gate, which opens directly into the Mount Tam watershed trail network.

Greenbrae, a short drive down Sir Francis Drake Boulevard, is its own patchwork of subareas: South Eliseo, Bon Air Hill, Bon Air Landing, Madrone Woodlands, and Greenbrae Hills, clustered around Bon Air Center and MarinHealth Medical Center. It's a mix of condos, townhouses, and single-family homes that trades at a meaningfully different price tier than Kent Woodlands, even though a letter carrier delivering to both would use the same ZIP code all day.

The confusion runs deeper than most buyers realize. Some national listing portals, including Realtor.com's own neighborhood breakdown, file Kent Woodlands as a Greenbrae subarea. The Kent Woodlands Property Owners Association and Marin County's own planning records place it firmly inside Kentfield. If the platforms that aggregate this data can't agree on which community a Kent Woodlands parcel belongs to, a buyer relying on an automated ZIP-level median has even less reason to trust the number on the screen.

What 94904 Actually Sold For in 2026

The spread becomes concrete once you look at closed transactions rather than portal averages.

Kentfield's fastest-moving listings this spring closed at 111.7 percent of their original asking price, the highest overbid recorded among Marin's towns for that period, a sign of just how much competition concentrates at the top of the Kent Woodlands market. Greenbrae's first half of 2026 told a calmer but still competitive story: 25 homes sold, up from 18 during the same stretch in 2025, with 48 percent closing above asking and an average premium of 11.4 percent over list.

Individual sales make the gap harder to wave away. A newly built home on Via Hermosa in Greenbrae closed at $4.05 million after listing at $3.895 million, a price that would fit comfortably in Kent Woodlands. A few blocks away, a three-bedroom condo on Corte Oriental listed at $895,000 and closed in April 2026 at $875,000. A unit on Via Casitas closed at $680,000. Homes on Almenar and Via la Cumbre closed at $1.45 million and $2.15 million respectively. One waterfront townhouse on South Eliseo Drive marketed its private boat dock as the headline feature, a reminder that Greenbrae's own internal range runs from entry-level condo to genuine waterfront luxury, all before you even cross into Kentfield's estate tier.

Why the Same Three Digits Mislead Buyers

A ZIP-code filter treats all of that as one dataset. It isn't. Blend a $680,000 Greenbrae condo with a $4 million Kent Woodlands estate and the resulting "94904 average" describes neither property and misleads anyone trying to gauge what their specific budget reaches.

The practical fix is to search by neighborhood name, not postal code, and to confirm which governing bodies actually apply to a given parcel before assuming the comps around it are relevant. A remodel in Kent Woodlands answers to the county and to the Kent Woodlands Property Owners Association's design review. A remodel three-quarters of a mile away in Greenbrae answers only to the county. Kentfield carries no Mello-Roos tax district anywhere in the community, and the diligence items that actually move a Kentfield deal are the flood map on the flats, where the concrete channel behind College of Marin marks the boundary of that risk, and the wildfire map higher in the Woodlands. Sewer service in Kentfield runs through the Ross Valley Sanitary District, and fire protection comes from the independent Kentfield Fire Protection District, both details worth confirming rather than assuming carry over identically once you cross into Greenbrae.

The county backdrop this spring makes precise pricing even more important than usual. Across Marin, homes that sold within 30 days between March and June 2026 closed around 5 percent over their original asking price, while listings that sat past 120 days closed nearly 16 percent under, a swing of more than $380,000 on a typical Marin home. Marin County's broader single-family median sat near $1.58 million for the three months ending April 2026, which means both Kentfield and Greenbrae are premium markets relative to the county as a whole, just at very different multiples of that floor. In a market this sensitive to timing and this fractured by micro-geography, guessing at value from a ZIP-code average is the fastest way to either overpay for a Greenbrae condo or underbid on a Kent Woodlands estate.

Kentfield's own history adds a footnote to all this. The community began as Ross Landing, the head of navigation for steamboats on Corte Madera Creek, and took its name from the Kent family, whose William Kent donated the land that became Muir Woods National Monument in 1908. That legacy shows up today in the low-density feel of Kent Woodlands and in a community that has never needed a city hall to protect what makes it valuable.

Quick Answers for 94904 Buyers

Is Kentfield or Greenbrae an incorporated city? Neither. Both are unincorporated Marin County communities. Kentfield projects route through the county's Kentfield Planning Advisory Board, and anything in Kent Woodlands adds a second review from the Kent Woodlands Property Owners Association.

Does a Kent Woodlands address always show up as Kentfield online? Not consistently. Some listing portals categorize Kent Woodlands under Greenbrae's neighborhood list, while the KWPOA and county planning records place it inside Kentfield. Confirm which jurisdiction actually governs a specific parcel rather than trusting a portal's category label.

Should I trust a "94904 median price" I find online? Treat it as a starting point, not a budget. That ZIP code blends Kent Woodlands estates, the Kentfield flats, and Greenbrae's full range of condos and single-family homes into one number that accurately describes none of them.

If you're weighing a move between Kentfield and Greenbrae and want to know what your specific budget actually reaches on each side of that shared ZIP code, Raquel Newman can walk you through the current comps street by street. Request your private market valuation and get a read on the numbers that actually apply to the home you're picturing.