Penngrove is a census-designated place in unincorporated Sonoma County, California.
Sonoma County · census-designated place
Penngrove
Penngrove is a census-designated place in unincorporated Sonoma County, in the North Bay. 4.03 sq mi of land. Zoning is set by the county, not a city government. Screen any APN in or near Penngrove for zoning, FEMA flood, CAL FIRE / WUI wildfire hazard, soils, geology, and planning — every finding linked to the official source — then verify with Sonoma County planning before you buy or entitle.
Updated 2026-08-29
Useful sources for searching Penngrove: Official sources to verify buildability in Penngrove ↓
About Penngrove land diligence
Penngrove is a census-designated place in unincorporated Sonoma County, in the North Bay. 4.03 sq mi of land. Zoning is set by the county, not a city government.
Penngrove is a census-designated place in unincorporated Sonoma County—confirm zoning with the county. Most deals need both a fast multi-layer screen and a follow-up with local planners—especially where city limits, specific plans, hillside fire standards, or floodplain rules apply.
Search intents this page answers: zoning in Penngrove, FEMA flood near Penngrove, CAL FIRE hazard severity, APN lookup, and whether a vacant lot is buildable before you spend on surveys or design.
Community snapshot
Climate: Mediterranean — mild wet winters, warm dry summers (North Bay).
Regional context: wine-country influence can shape land use, tourism, and edge-lot values.
Housing & land patterns
Median home
$1.20M
Median income
$107k
Ownership
76%
Median year built
1972
vs California
+57%
Terrain
Coastal bluffs · Russian River · Santa Rosa Plain
Penngrove is a California community with a high-value housing market well above the California ACS median, household incomes near the state average, a owner-heavy housing mix, and housing stock primarily built during the mid- to late-20th century.
Housing market
Median home value
$1.20M
$1,196,000
Much higher than CA
Median rent
$2,130/mo
Median household income
$107k
$107,147
Somewhat higher than CA
Vacancy rate
8.2%
+57% vs California ACS median
Housing characteristics
1972
19202025
Typical home age signal — not a forecast of new construction.
Affordability & housing mix
Home value ÷ income
11.2×
ACS proxy — median home value divided by median household income
Rent ÷ income
24%
Annual median gross rent as share of median household income
Rent burden 30%+
45%
Share of renter households paying 30% or more of income on gross rent
Derived ACS ratios for market context — not a proprietary cost-of-living index or lender qualification standard.
Units-in-structure mix from ACS — shares of total housing units, not new construction pipeline.
Lifestyle & investment
Families
- Household incomes support a relatively affluent profile
- Neighborhood amenities and lot hazards still decide fit
- Confirm attendance boundaries on the specific APN
Retirees
- Housing stock centered around 1972 — maintenance needs vary
- Walkability and healthcare access differ street to street
- Review HOA rules, insurance, and parcel hazards before buying
Investors
- Owner-heavy markets still need local rental comps
- ACS median gross rent about $2,130/mo
- Zoning, ADU rules, and insurance drive outcomes more than ACS averages
Builders
- Valley lots can be gentle yet flood-exposed—pair topography with FEMA
- Verify zoning, setbacks, and utility access early
- Geotechnical and grading reviews are common on hillside lots
Terrain & geography
Sonoma County spans Pacific coast, foggy river valleys, volcanic highlands, and Mayacamas ridges. Petaluma and Santa Rosa flats sit near steep coastal and mountain terrain within the same county.
Elevation Sea level along the coast to roughly 4,000+ ft in the Mayacamas and Geysers area
01Coastal bluffsCoastal bluffs, terraces, and Sonoma Coast headlands
02Russian RiverRussian River and Petaluma River valleys and floodplains
03Santa Rosa PlainSanta Rosa Plain and other inland valley floors
04Mayacamas MountainsMayacamas Mountains, Sonoma Mountain, and volcanic highlands
Development checklist
- Slope and grading feasibility
- Flood exposure and drainage
- Wildfire / WUI hazard
- Liquefaction and geology where mapped
- Zoning, setbacks, and overlays
- Utility access (water, sewer/septic, power)
- Geotechnical conditions on hillside or fill lots
Screen slope and elevation on the APN in Parcel View, then confirm grading, driveway grades, and pad feasibility with Sonoma County planning and a licensed surveyor/engineer.
Key takeaways
- Housing prices in Penngrove sit well above the California ACS median.
- Terrain shifts across several landscapes — from coastal bluffs to mayacamas mountains.
- Parcel-specific screening for zoning, flood, wildfire, soils, and slope matters more than any countywide average.
What Parcel View checks in Penngrove
Parcel & APN
Boundary and assessor parcel number context so you can confirm you are looking at the right lot inside or near Penngrove.
Zoning & land use
Reference zoning and general plan overlays from public GIS—verify final district with Sonoma County planning.
FEMA flood
National Flood Hazard Layer zones across the parcel, including Special Flood Hazard Areas that affect insurance and building rules around Penngrove.
Wildfire hazard
CAL FIRE Fire Hazard Severity Zones and WUI context for insurance and defensible-space diligence around Penngrove.
Soils
USDA SSURGO map units for a first look at septic suitability, drainage, and grading constraints where mapped near Penngrove.
Geology & slope
Mapped liquefaction, fault, landslide, and terrain screens where the state publishes them for Sonoma County.
Verify locally
Parcel View is a first-pass public GIS screen. City or county planning makes official determinations for Penngrove.
- Sonoma County planning ↗ — zoning, general plan, and permit rules.
- Sonoma County Assessor ↗ — parcel numbers and lot records.
- Sonoma County Parcel View page — county-wide layers and nearby context.
- Sonoma FEMA flood screen
- Sonoma wildfire hazard screen
- Sonoma zoning screen
- FEMA Map Service Center ↗ — flood zones and base flood elevations.
- CAL FIRE Fire Hazard Severity Zones ↗ — state wildfire hazard mapping.
Living and buying land in Penngrove
Penngrove is a census-designated place in unincorporated Sonoma County, California.
Climate: Mediterranean — mild wet winters, warm dry summers (North Bay).
Regional context: wine-country influence can shape land use, tourism, and edge-lot values.
Wildfire, flood, and insurance diligence in Penngrove
Hazard diligence is parcel-specific in Penngrove, but community patterns matter for underwriting and timeline.
Wildfire: community screening level is moderate — Sonoma County has extensive WUI history — screen CAL FIRE on every APN.
Flood: community screening level is moderate — Flood risk varies by floodplain, alluvial fan, and local drainage. Screen FEMA layers on the APN and ask about drainage history.
Seismic: California is seismically active. Review Alquist-Priolo / fault maps and local geologic hazards for the APN..
Insurance diligence often focuses on wildfire underwriting, defensible space, and flood determination where mapped.
FAIR Plan / insurance context: Homeowners insurance can be constrained by wildfire, brush, and sometimes flood. FAIR Plan appears more often in higher wildfire zones — verify early in diligence.
Commute, transit, and utilities in Penngrove
Commute times depend on destination and time of day — map drive times rather than a single citywide average.
Visit the parcel at the hours you would actually commute — last-mile access varies street-by-street.
Sewer vs septic: Often septic — verify..
Wells: Common.
Electric/gas utility context is typically PG&E territory in this part of Sonoma County — confirm the serving utility on the meter.
Broadband availability varies by street — confirm cable, fiber, fixed wireless, or satellite for the exact address.
Penngrove subareas and lot patterns
Penngrove is often searched as a single community name on listings and county maps.
Even without a long published neighborhood list, lot-level zoning, hazards, utilities, and school boundaries still vary.
When comparing two lots in Penngrove, weight WUI/fire, FEMA flood, septic vs sewer, slope/access, and easements carefully.
Lifestyle context for Penngrove
Lifestyle in Penngrove is shaped by Sonoma County’s mix of neighborhoods, commercial corridors, and nearby open space.
Separate lifestyle preferences from lot-level buildability — a great street can still fail on fire insurance, flood zone, slope, or septic capacity.
Pets: Generally pet-friendly communities; confirm HOA/rental rules per property.
How to screen a parcel in Penngrove
Enter the address or APN on Screen and confirm jurisdiction (Sonoma County planning (unincorporated) vs Sonoma County).
Review zoning, FEMA flood, CAL FIRE / WUI, soils, geology, and slope/elevation overlays.
Short-term rentals: STR rules vary by city and often require permits — verify with the local code enforcement / planning desk.
- Median home value (ACS)
- $1,196,000 (about 57% above the California statewide ACS median) · ACS 2020-2024
- Median gross rent (ACS)
- $2,130/mo · ACS 2020-2024
- Median household income (ACS)
- $107,147 · ACS 2020-2024
- Homeownership (ACS)
- 76% owner-occupied
- Housing stock age
- About 1972
- Market context
- Median home $1,196,000 (about 57% above the California statewide ACS median); vacancy about 8.2% · ACS 2020-2024 context
- County elevation range
- Sea level along the coast to roughly 4,000+ ft in the Mayacamas and Geysers area
- Fire risk (community)
- moderate
- Flood risk (community)
- moderate
Common Penngrove buyer questions
Short screening answers for searches buyers actually type. These are community-level notes — confirm on the parcel and with Sonoma County planning.
Is this area expensive?
Median owner-occupied home value is about $1,196,000 (about 57% above the California statewide ACS median); median gross rent about $2,130/mo. Neighborhoods vary — confirm current listings with a local agent.
Is it a buyer's market?
Median home $1,196,000 (about 57% above the California statewide ACS median); vacancy about 8.2% · ACS 2020-2024 context
Is it family friendly?
High household incomes (about $107,147) suggest a relatively affluent community, but school quality, commute, parks, and parcel hazards still decide family fit. Confirm attendance boundaries and screen fire/flood on the APN.
Is it good for retirees?
Housing built around 1972 means maintenance needs vary. Walkability, healthcare access, HOA rules, and insurance costs should be reviewed before purchasing.
Is it good for investors?
Tenure mix is about 76% owner-occupied. Median gross rent about $2,130/mo. Rental demand may help, but zoning, ADU rules, STR ordinances, and insurance ultimately determine investment potential.
Are rentals in demand?
Median gross rent is about $2,130/mo. Confirm vacancy, comps, and any rent-stabilization or STR rules before underwriting.
Is there new construction?
Typical stock ages to around 1972; newer tracts and Housing Element sites still need local planning maps. Check current applications with Sonoma County planning for unincorporated land.
Can I build an ADU?
California ADU law is strong; confirm city ordinance standards and parcel hazards with planning.
Is there public sewer?
Often septic — verify.
Are wells common?
Common.
Are short-term rentals allowed?
STR rules vary by city and often require permits — verify with the local code enforcement / planning desk.
Is it pet friendly?
Generally pet-friendly communities; confirm HOA/rental rules per property.
Screen a parcel in Penngrove Local planning ↗ Sonoma County guide
Profile confidence: medium · Updated 2026-08-05. Informational screening only.
Frequently asked questions about Penngrove parcels
Is land in Penngrove buildable?
Buildability is not a single map label. Screen zoning, flood, wildfire hazard, access, and soils for the specific APN near Penngrove, then ask Sonoma County planning whether your proposed use can be entitled and permitted.
How do I check zoning in Penngrove?
Run a Parcel View screen for a first-pass zoning/general-plan reference, then confirm the controlling district with Sonoma County planning. Overlays and specific plans can change what is allowed.
Does Penngrove have FEMA flood risk?
Flood risk is parcel-specific. Parcel View intersects the FEMA National Flood Hazard Layer with the lot polygon. Always verify Special Flood Hazard Areas and base flood elevations on the FEMA Map Service Center before financing or building.
How do I screen a parcel in Penngrove?
Enter the address or APN in Parcel View. Penngrove is a census-designated place in unincorporated Sonoma County—confirm zoning with the county.
Is Parcel View a substitute for Sonoma County planning?
No. It is a first-pass public GIS screen with source links. City or county planning makes official determinations.