100 Underhill Rd, Orinda, CA 94563 Property Records

Contra Costa County property record for 100 Underhill Rd, Orinda, CA 94563

Property Summary

Property Type	Single Family Home
Details	3 bd · 2.5 ba · 1,887 sqft · built 1964
Lot Size	0.436 acres (19,000 sqft)
Owner	2 Trust Names on File
Last Sale	$850,000 (Jun 2014)
Tax Bill	$13,988 (2025)
Deeds & Mortgages	Mar 2019 Transfer Mar 2019 Transfer
Flood Zone	Zone X (minimal risk)
APN	`273-043-003-6`

Property Details

APN / Parcel Number

Primary APN	`273-043-003-6`
Alternative APN	`273-043-003`

Interior

Bedrooms	3 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	8 Rooms
Stories	1 Story
Building Area	1,887 sqft Living Area
1st Floor Area	1,887 sqft

Exterior

Year Built	Built 1964
Effective Year Built	Effective 1964
Lot Area	19,000 sqft (0.436 acres)
Garage Type	Attached
Garage Area	528 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	100 UNDERHILL RD
City	ORINDA
State	CA
Zip	94563-3342
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	RESUB ENCINAS DE MORAGA LOT 3
Legal Subdivision	ENCINAS DE MORAGA
Legal Lot Number	3
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	2
Census Block	2004
Census Tract	353001

Owner

100 Underhill Rd is held in a trust since March 2019.

Source: Contra Costa County records, as of July 14, 2026

Owner of Record	2 Trust Names on File
Mailing Address	100 UNDERHILL RD, ORINDA, CA 94563-3342
Owner Type	Company
Vesting	Trust

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Date	Document
Mar 19, 2019	Quit Claim Deed, Transfer NOT AVAILABLE
Mar 19, 2019	Quit Claim Deed, Transfer NOT AVAILABLE

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jun 10, 2014 · Amount on File
Deed Sale	Jun 10, 2014 · Amount on File
Prior Sale	Mar 27, 2013 · Amount on File
Deed Document Number	201494150
Last Transfer Date	Mar 14, 2019
Transfer Doc	0000037548
Record Updated	Oct 29, 2026

March 2019: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Mar 19, 2019
Property Address	100 UNDERHILL RD, ORINDA, CA 94563-3342
Document Number	0000037548
Instrument Date	Mar 14, 2019
Instrument	37548
Transaction Type	Transfer
Record Updated	Apr 16, 2019
Title Company	NOT AVAILABLE

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	100 UNDERHILL RD ORINDA CA 945633342, ORINDA, CA 94563-3342

March 2019: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Mar 19, 2019
Property Address	100 UNDERHILL RD, ORINDA, CA 94563-3342
Document Number	0000037547
Instrument Date	Mar 14, 2019
Instrument	37547
Transaction Type	Transfer
Record Updated	Apr 16, 2019
Title Company	NOT AVAILABLE

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Community Property
Address	100 UNDERHILL RD ORINDA CA 945633342, ORINDA, CA 94563-3342

Tax Assessment & Valuation

The 2025 property tax bill for 100 Underhill Rd was $13,988.

Source: Contra Costa County assessment roll, as of July 14, 2026

Property Jurisdictions

Type	Name
State	California
County	Contra Costa County
Municipality	Orinda City
Secondary School District	Acalanes Union High School District (09 - 12)
Elementary School District	Orinda Union Elementary School District (KG - 08)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$1,067,141 (+2%) Land $906,520 Building $160,621
2025	$13,988.00	$1,046,218 Land $888,746 Building $157,472
2023	$13,544.00 (+3.41%)	$1,005,594 Land $854,236 Building $151,358
2022	$13,098.00

Assessed value is set for property tax purposes and is not a market price estimate.

Flood

FEMA maps place 100 Underhill Rd in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.

Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Nearest Special Flood Hazard Area	Zone AE, within 500 ft
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	9 in force
Nearby Flood Claims	22 (1978–2005)
Claims Outside the SFHA	2 of 22
Most Recent Claim	Dec 2005 · Severe Storms, Flooding, Mudslides, And Landslides
Claims by Event	Severe Storms, Flooding, Mud And Landslides, Jan 1997 · 6 claims Severe Winter Storms, Flooding, Landslides, Mud Flows, Jan 1995 · 4 claims Coastal Storms, Floods, Slides & Tornadoes, Mar 1983 · 3 claims

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.

Wildfire

Wildfire risk around 100 Underhill Rd is low, with a 0.03% annual chance of wildfire.

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Low lower than 65% of the US · lower than 79% of California
Wildfire Likelihood	0.03% annual chance
Exposure	None beyond ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	EAST BAY MUD serves 1,468,000 people · EPA ID CA0110005
Water Source	Surface water
Last State Inspection	Dec 2021
Lead	Under 1 ppb (2022–2024) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	None last 3 years

Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes. This system sells water to local utilities; the supplier billing this address may be one of them.

Internet Providers

Source: FCC Broadband Data Collection, based on 312 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20
AT&T Fixed Wireless · Fiber in parts of the area	100 / 20

May also be available: Etheric Networks, Unwired.

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