learnportola valley neighborhoodspublic parcel records, october 2026boyenga team at compass
Portola Valley neighborhoods, side by side
Each of our 8 Portola Valley neighborhood guides in one table: its single-family homes, their median lot (and age and size, where the records publish them), and how many sit in FEMA flood, CAL FIRE fire and state earthquake zones, counted parcel by parcel from public records.
- neighborhoods8Boyenga Team guides
- homes counted2,273houses and single-family lots
- median lot range12,290to 112,170 sq ft
- in a fire hazard zone2,12994% of homes counted
side by side
Every Portola Valley neighborhood, side by side
One row per neighborhood guide. Select a column heading to sort; each name opens its guide.
| Alpine Hills | 250houses | 49,4801.1 acres | 1963 | 31% | 250100% | 125% | 229% | 0 |
| Arrowhead Meadows & Stonegate | 289houses | 45,6101.0 acres | 1964 | 31% | 289100% | 7526% | 124% | 103% |
| Ladera | 533lots | 12,2900.28 acre | — | 0 | 41778% | 82% | 428% | 0 |
| Los Trancos Woods & Vista Verde | 252lots | 26,6900.61 acre | — | 0 | 252100% · 119 very high | 0 | 22690% | 14056% |
| Portola Road & Town Center | 282houses | 17,6900.41 acre | 1963 | 104% | 25490% | 6623% | 31% | 5620% |
| Portola Valley Ranch & Blue Oaks | 226houses | 22,3500.51 acre | 1984 | 0 | 226100% | 94% | 5022% | 11450% |
| Westridge | 275houses | 112,1702.6 acres | 1964 | 41% | 275100% | 187% | 3011% | 0 |
| Woodside Highlands & Hayfields | 166houses | 13,9600.32 acre | 1952 | 0 | 166100% | 2917% | 6740% | 2213% |
Homes = single-family houses where the records identify them, otherwise lots zoned or coded single-family (marked “lots”). Percentages are shares of the homes counted in that neighborhood. Year built and house size are medians, shown only where the records publish them for at least 80% of the homes (— otherwise).
what stands out
What stands out
- Lot sizesMedian lots run from 12,290 sq ft in Ladera to 112,170 sq ft (2.6 acres) in Westridge.
- Year builtWhere the records publish it, the median year built runs from 1952 in Woodside Highlands & Hayfields to 1984 in Portola Valley Ranch & Blue Oaks.
- Flood zones (FEMA)4 of the 8 neighborhoods have homes in a FEMA high-risk flood zone; the highest share is in Portola Road & Town Center (10 of 282, 4%), followed by Westridge (1%).
- Fire zones (CAL FIRE)All 8 neighborhoods have homes with part of the lot in a fire hazard severity zone; the highest share is in Arrowhead Meadows & Stonegate (289 of 289, 100%), followed by Westridge (100%). 119 of the 2,129 homes are in Very High zones.
- Liquefaction zones7 of the 8 neighborhoods have homes in a liquefaction zone; the highest share is in Arrowhead Meadows & Stonegate (75 of 289, 26%), followed by Portola Road & Town Center (23%).
- Landslide zonesAll 8 neighborhoods have homes in an earthquake-induced landslide zone; the highest share is in Los Trancos Woods & Vista Verde (226 of 252, 90%), followed by Woodside Highlands & Hayfields (40%).
- Fault zones (Alquist-Priolo)5 of the 8 neighborhoods have homes in an Alquist-Priolo fault zone; the highest share is in Los Trancos Woods & Vista Verde (140 of 252, 56%), followed by Portola Valley Ranch & Blue Oaks (50%).
prices
What homes are selling for
Prices move every week, so they live on pages that read the MLS each time they load.
- Neighborhood RankingEach Portola Valley neighborhood ranked by median price per square foot from the last 180 days of sales.
- Price per Sq Ft MapEvery recent Portola Valley sale plotted where it happened, shaded by price per square foot.
the method
How we counted
- Neighborhoods
- Our Portola Valley neighborhood guides, using the outline drawn for each guide (approximate; neighboring outlines can overlap). Guides with fewer than 20 counted homes are left out.
- Homes
- Single-family houses where the records identify them, otherwise lots zoned or coded single-family. Condos and townhomes are not counted. These are the same homes as on our Flood & Fire, Lot Size and Earthquake Zones pages.
- Lot size
- The median parcel lot area: the parcel record’s lot area where the source publishes one, otherwise the area of the mapped parcel outline. Approximate; confirm a parcel’s size with the county assessor or a title report.
- Flood
- FEMA high-risk flood zones (A, AE, AH or AO) at each parcel’s center, on FEMA’s flood maps as of October 2026.
- Fire
- Any part of the lot inside a CAL FIRE fire hazard severity zone (Moderate, High or Very High), counted once in its highest zone, on CAL FIRE’s current maps as of October 2026.
- Earthquake zones
- The California Geological Survey’s liquefaction, earthquake-induced landslide and Alquist-Priolo fault zones as published in October 2026, judged at each parcel’s center.
- Source for Portola Valley
- County assessor records (Town of Portola Valley layer), and the San Mateo County parcel layer (use codes as of June 2020) for guides outside the city limits.
questions
Questions we hear
Which Portola Valley neighborhood has the biggest lots?
Among our 8 Portola Valley neighborhood guides, Westridge has the largest median lot, about 112,170 square feet (2.6 acres), and Ladera the smallest, about 12,290 square feet. Lot sizes come from public parcel records as of October 2026.
Do any Portola Valley neighborhoods have homes in a flood zone?
4 of the 8 neighborhoods have homes in a FEMA high-risk flood zone; the highest share is in Portola Road & Town Center (10 of 282, 4%), followed by Westridge (1%). That’s judged at each parcel’s center on FEMA’s maps as of October 2026.
Are any Portola Valley homes in an earthquake fault zone?
342 of the 2,273 homes counted are in an Alquist-Priolo Earthquake Fault Zone, in Los Trancos Woods & Vista Verde, Portola Valley Ranch & Blue Oaks, Portola Road & Town Center and 2 more. New buildings for people generally can’t be built across an active fault trace, and sellers must disclose when a home is in a zone.
Where can I see home prices by neighborhood?
Our Neighborhood Ranking page ranks each Portola Valley guide by median price per square foot from the last 180 days of sales, live from the MLS, and the Price per Sq Ft Map plots each sale where it happened.
more to learn
Keep going
- Portola Valley homes and neighborhoodsHomes for sale and the full list of our Portola Valley neighborhood guides.
- Lot Size by NeighborhoodThe same lot sizes next to every other city’s neighborhoods.
- Flood & Fire ZonesFlood and fire zone counts with zone-by-zone detail.
- Earthquake ZonesLiquefaction, landslide and fault zone counts for 415 neighborhoods.
- Outside Mapped Hazard ZonesThe neighborhoods where no counted home sits in a flood, fire or earthquake zone.
- One-Story HomesThe share of one-story houses in each Portola Valley neighborhood where the records list stories.
- Year Built by NeighborhoodHow old the homes are in each Portola Valley neighborhood where the records publish it.
- Earthquake Retrofit GrantsState grants to brace and bolt an older house on a raised foundation.
- Neighborhood RankingEach Portola Valley neighborhood ranked by price per square foot, live from the MLS.
- Property Nerds Data LibraryThe datasets behind these numbers (PN-DS-27 to PN-DS-29) as CSV downloads.
Counts from public parcel records and FEMA, CAL FIRE and California Geological Survey maps as published in October 2026 (San Mateo County use codes as of June 2020). Neighborhood outlines are our own and approximate. Not a substitute for a property-specific report or the disclosures in a sale.
talk to a property nerd
Weighing a few Portola Valley neighborhoods?
We’ll pull the parcel facts, hazard maps and recent sales for the streets you’re considering, and walk you through what they mean for price. Commissions are negotiable, and we offer bundled services, so ask us what’s included.
