94028 homes for sale Portola Valley

What sold in 94028 lately

Median sale price by month for the last 12 months, then the latest closed sales.

Loading recent sales…

Closed sales reported to the MLS. Homes that sold privately don’t appear, and a few listings leave out square footage.

94028 by the numbers

71 houses sold in 94028 in the year to October 27, 2026, at a median of $4.03M, down 9% on the year before. Half of them sold between $3.26M and $5.88M.

• median house price$4.03Mdown 9% on the year before
• houses sold, 12 months7166 the year before
• median $ per sq ft$1,424houses
• sold over asking35%of houses with a list price
• median house size3,320 sq ft
• median lot43,560 sq ft
• highest house sale$56M

From the listing descriptions of those houses: 14% were called single-story, 13% mentioned an ADU, in-law unit or guest cottage, 28% a pool and the most common size was 4 bedrooms.

Among the 69 ZIP codes in Santa Clara and San Mateo counties with 20 or more house sales, 94028’s median ranks 7th, just below 94010 Burlingame and Hillsborough ($4.2M) and above 95030 Los Gatos and Monte Sereno ($4M).

Next to its neighbors

The 7 ZIP codes ranked next to 94028, of 8 in South San Mateo County. Whole ZIP codes, houses only, same 12 months.

San Mateo County housing market by city and ZIP · The most expensive ZIP codes in Silicon Valley

How we counted: closed sales reported to the MLS from October 28, 2025 to October 27, 2026, read through the IDX feeds behind our home search on October 28, with repeat records removed. Houses are the MLS’s detached-home type; condos and townhomes are counted apart. “The year before” is the 12 months to October 27, 2025. Price per sq ft leaves out houses under 400 sq ft and condos under 300. Single-story, ADU and pool counts come from the words in each listing. The figures at the top of this page are live and cover 6 months, so they differ. Past sales aren’t a forecast or the value of any one home.

Where 94028 is

Our guides go street by street, with live listings, a map and what to check before you buy.

More neighborhood guides in 94028

Homes near landmarks in and around 94028

More South San Mateo County ZIP codes

Every San Mateo County ZIP code

Buying or selling by ZIP code

• A ZIP code isn’t a city lineZIP codes are mail routes. Check the city or county on the parcel itself, since it sets the tax rate, the permit office and local services.
• Flood and fire maps go by parcelFEMA flood zones and the state’s fire hazard maps follow the land, not the ZIP code. Check the exact address, since a zone can change what insurance costs.
• Price from the right compsWhen we price a home, we compare sales on the same side of those lines and in the same neighborhood, not just the same ZIP.
• Earthquake retrofit grantsZIP code 94028 is on the state’s 2025 Earthquake Brace + Bolt list, which can pay up to $3,000 toward bracing and bolting an older house on a raised foundation. How it works