Skip to content
Skip to content
TopHapOpen in map

Portola Valley 94028

ZIP codeThe kind of area this report covers. Neighborhood areas nest inside each other, from broad districts down to small pockets.CaliforniaBalanced market
Market temperatureA 0 to 100 score comparing this area with every similar area nationwide each month. 0 is the strongest buyer's market, 100 the strongest seller's market.Balanced market · 56
Buyer's marketBalancedSeller's market
$3.5M
Median sale priceThe middle sale price each month, counting normal open-market sales. The average runs above the median when a few expensive sales pull it up. Bars show how many homes sold.
-6.1%
1-yr changeHow much prices and sales counts changed since the same time last year, using a 3-month average to smooth out noise. Above the dashed line means growth.
90
Sales (12 mo)How many homes sold here in the last 12 months. More sales make the other numbers more reliable.
$3.7M
Median valueThe middle estimated value of all homes here, not just the ones that recently sold.

Deed records through Jun 2026Counties take time to publish deeds, so the newest months can be incomplete and may shift as more records arrive.

Market Trends

Market temperature (0–100)How the 0 to 100 market score moved over time. It blends price growth, sales pace, how often homes change hands, and seller profits.Temperature
20162018201920202022202320252026
Sale pricesThe middle sale price each month, counting normal open-market sales. The average runs above the median when a few expensive sales pull it up. Bars show how many homes sold.MedianSales
20162018201920202022202320252026
Growth (year over year)How much prices and sales counts changed since the same time last year, using a 3-month average to smooth out noise. Above the dashed line means growth.PriceSales
20162018201920202022202320252026
Price per square footThe middle price per square foot, for sales where the size is known. It adjusts for homes being different sizes.$/ft²
20162018201920202022202320252026
Sale premium vs estimated valueHow sale prices compare with our estimated values at the time of sale. Above the dashed line, homes sold for more than the models expected — a sign of competitive bidding. Below it, buyers paid under model value.Premium
20162018201920202022202320252026
Annual turnover (share of homes sold)The share of all homes here that sold in the trailing 12 months. Higher turnover means a more liquid market where homes trade hands more often.Turnover
20162018201920202022202320252026
Buyer mixWho is buying. Cash means no mortgage was recorded, investor means the buyer looked like an investor, and flip means the home resold within a year.CashInvestorFlip resale
20162018201920202022202320252026
Financing (share of purchase price)For buyers who borrowed: the middle share of the price they financed, and the middle share they paid up front.Loan (LTV)Down payment
20162018201920202022202320252026
Sellers who sold at a gainThe share of sellers each month who sold for more than they originally paid.Sold at gain
20162018201920202022202320252026
Typical hold before sellingThe middle number of years sellers owned their home before selling.Median hold
20162018201920202022202320252026
Median annualized return at resaleThe middle yearly gain sellers earned, spread across the years they owned the home. Only counts homes held at least a year.Annualized gain
20162018201920202022202320252026
Preforeclosure filingsForeclosure notices filed each month. A rise can be an early sign that more owners are struggling. Auction stage counts the filings that reached a scheduled foreclosure auction.FilingsAuction stage
2016201720192023202420252026

Housing Stock

HomesHow many homes we have records for in this area.2,382
Median value (AVM)The middle estimated value of all homes here, not just the ones that recently sold.$3.7M
Median sizeThe middle home size here, measured in square feet.2,720 ft²
Median bedroomsThe middle bedroom count for homes here.4
Median year builtThe middle build year for homes here. A recent year means most housing is newer.1964
Single familyThe share of homes here that are single-family houses.100%

Equity & Ownership

Equity rich (LTV ≤ 50%)The share of owners who owe half or less of what their home is worth, meaning they hold a lot of equity.74%
Underwater (LTV ≥ 125%)The share of owners who owe at least 25% more than their home is worth.1.0%
Owner occupiedThe share of homes lived in by their owner rather than rented out or left empty.72%
Company ownedThe share of homes owned by a company or trust instead of a person.75%
Median loan-to-valueThe middle share of home value still owed on loans across all owners here.29%
Typical ownership tenureHow long the typical owner here has held their home.20.0 yrs

CommunityThese are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.75
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.83
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.708

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.91%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.32%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.6,086
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.365 / mi²
Median household incomeThe middle household income here — half of households earn more, half earn less.$235K
Average household incomeThe average household income. It runs higher than the median when a few high earners pull it up.$376K
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.33 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.67%

Market metrics are derived from recorded arms-length deeds and refreshed nightly. Temperature blends price momentum, sales velocity, turnover and resale outcomes, ranked against all ZIP codes nationally.

How Portola Valley 94028 compares

By median home value, Portola Valley 94028 is the 2nd most expensive of 28 ZIP codes in San Mateo County, and its typical home is worth more than 93% of all homes in San Mateo County.

Home values in Portola Valley 94028

Share of homes at each estimated value.

Median
$1.5M$8M
ZIP codes in San Mateo County ranked by median home value
#San Mateo CountyMedian valueHomes
1Atherton 94027$6.6M2,584
2Portola Valley 94028$3.7M2,382
3Burlingame 94010$3.3M12,201
4Menlo Park 94025$2.8M12,143
5Redwood City 94062$2.7M8,855
6San Mateo 94402$2.4M7,885
7San Carlos 94070$2.4M10,500
8Belmont 94002$2.1M7,604
9Redwood City 94061$2M9,188
10Millbrae 94030$1.9M6,507
11Palo Alto 94303$1.9M10,568
12Redwood City 94065$1.8M4,247
13San Mateo 94403$1.7M11,704
14San Mateo 94404$1.6M10,362
15Half Moon Bay 94019$1.5M4,360
16Moss Beach 94038$1.5M993
17Montara 94037$1.4M1,045
1894018$1.4M1,671
19Redwood City 94063$1.3M4,668
20Pacifica 94044$1.2M11,853
21San Bruno 94066$1.1M12,156
22San Mateo 94401$1.1M8,111
23Pescadero 94060$1M369
24Daly City 94015$1M14,558

28 ZIP codes in San Mateo County are ranked; the most valuable are listed here.

About the Portola Valley 94028 market

What is the median home price in Portola Valley 94028, CA?

The median sale price in Portola Valley 94028, CA is $3,537,333 (data through June 2026), based on deeds recorded with the county. That is down 6.1% from a year earlier.

How many homes sell in Portola Valley 94028, CA each year?

90 homes sold in Portola Valley 94028, CA over the last 12 months (data through June 2026). TopHap counts recorded arm's-length deeds, not listings, so the figure is not affected by which brokerage handled the sale.

Is Portola Valley 94028, CA a buyer's or seller's market?

Portola Valley 94028, CA is currently a balanced market, scoring 56 out of 100 on TopHap's market temperature index (data through June 2026). The score weighs sales velocity and price direction; above 60 favours sellers, below 40 favours buyers.

How many homes are there in Portola Valley 94028, CA?

Portola Valley 94028, CA contains 2,382 residential properties, with a median of 2,720 square feet, 4 bedrooms, built around 1964. The median TopHap Estimate is $3.7M.

How does Portola Valley 94028, CA compare to the rest of San Mateo County?

By median home value, Portola Valley 94028, CA is the 2nd most expensive of 28 ZIP codes in San Mateo County. Its typical home is worth more than 93% of all homes in San Mateo County. Atherton 94027 ranks just above it and Burlingame 94010 just below. The ranking is rebuilt nightly from the county assessor record of every home in each area.

Do people own or rent in Portola Valley 94028, CA?

72% of homes in Portola Valley 94028, CA are owner-occupied. 75% are held by a company rather than an individual.

How much equity do owners in Portola Valley 94028, CA hold?

74% of mortgaged homes in Portola Valley 94028, CA are equity-rich, meaning the loan balance is under half the home's value. 1.0% owe more than the home is worth.

Nearby markets

Browse addresses

Every street and address TopHap holds is browsable by state, county and city. Browse CA property records.

Explore Portola Valley 94028 on the map

See every recorded sale, price heat map, school zone and flood overlay across Portola Valley 94028in TopHap’s interactive 3D map.

Open in map