4873 Mason St, Pleasanton, CA 94588 Property Records

Alameda County property record for 4873 Mason St, Pleasanton, CA 94588

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,489 sqft · built 1976
Lot Size	0.142 acres (6,200 sqft)
Owner	2 Individual Names on File
Last Sale	$1,255,000 (Mar 2021)
Tax Bill	$15,901 (2025)
Deeds & Mortgages	Mar 2021 Sale & Mortgage
Flood Zone	Zone X (moderate risk)
APN	`941-1305-40`

Property Details

APN / Parcel Number

Primary APN	`941-1305-40`
Alternative APN	`941-1305-040-00`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	7 Rooms
Stories	1 Story
Building Area	1,489 sqft Living Area

Exterior

Year Built	Built 1976
Effective Year Built	Effective 1977
Architectural Style	L-Shape
Construction Type	Wood
Lot Area	6,200 sqft (0.142 acres)
View / Lot	Average
Parking Spaces	2 Parking Spaces

Location & Zoning

Street Address	4873 MASON ST
City	PLEASANTON
State	CA
Zip	94588-3844
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT: 00020 BLK: TR: 3311
Legal Subdivision	2952 VALVISTA UN 3
Legal Tract	3311
Legal Lot Number	20
Legal Unit	8
Jurisdiction	ALAMEDA CA
Township / Civil Division	LIVERMORE-PLEASANTON
Census Block Group	4
Census Block	4019
Census Tract	450603

Owner

4873 Mason St is owned and occupied by two individuals who bought it in March 2021.

Source: Alameda County records, as of August 5, 2026

Owner of Record	2 Individual Names on File
Mailing Address	4873 MASON ST, PLEASANTON, CA 94588-3844
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

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

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Mar 12, 2021 · Amount on File
Deed Sale	Mar 12, 2021 · Amount on File
Deed Document Number	2021101967
Prior Transfer Date	Jan 5, 2013
Prior Transfer Doc	0000008791
Record Updated	Oct 29, 2026

March 2021: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	ALAMEDA CA
Recording Date	Mar 12, 2021
Property Address	4873 MASON ST, PLEASANTON, CA 94588-3844
Document Number	0000101967
Map Reference	MB 77 PG 96
Instrument Date	Mar 2, 2021
Instrument	2021101967
Transaction Type	Transfer
Record Updated	Aug 19, 2021
Title Company	OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	4873 MASON ST, PLEASANTON, CA 94588-3844

Mortgage

Document Number	0000101968
Date	Mar 12, 2021
Instrument	2021101968

Lender

Name	US BANK NA
Type	Bank

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Apr 1, 2051

Interest

Rate Type	Adjustable Rate
Rate	2.12%
Type Change Date	Apr 1, 2026
Change Frequency	Annually
Index	1-Year CMT
Max Rate	7.12%

Tax Assessment & Valuation

The 2025 property tax bill for 4873 Mason St was $15,901 with a homeowner's exemption.

Source: Alameda County assessment roll, as of August 5, 2026

Property Jurisdictions

Type	Name
State	California
County	Alameda County
Municipality	Pleasanton City
Unified School District	Pleasanton Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$1,378,594 (+1.48%) Land $415,678 Building $969,916
2025	$15,901.00 Homeowner's exemption	$1,358,436 Land $407,531 Building $950,905
2023	$14,159.00	$1,305,701 Land $391,710 Building $913,991	$1,359,810

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Flood

FEMA maps place 4873 Mason St in Zone X, an area of moderate flood risk, within 500 ft of a high-risk flood zone.

Source: FEMA National Flood Hazard Layer, effective May 25, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X moderate risk
500-Year Floodplain	Yes 0.2% annual chance
Nearest Special Flood Hazard Area	Zone A, within 500 ft
Flood Insurance Requirement	Not required lenders may require it
Community Rating System	Class 7 (15% premium discount)
Nearby Flood Policies	4 in force
Nearby Flood Claims	3 (1983–1992)
Claims Outside the SFHA	1 of 3
Most Recent Claim	Aug 1992 · other causes

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 4873 Mason St is low, with a 0.01% annual chance of wildfire.

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

Wildfire Risk	Low lower than 80% of the US · lower than 88% of California
Wildfire Likelihood	0.01% 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	CITY OF PLEASANTON serves 76,689 people · EPA ID CA0110008
Water Source	Purchased surface water from ZONE 7 WATER AGENCY
Last State Inspection	May 2024
Lead	Under 1 ppb (2023–2025) 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.

Internet Providers

Source: FCC Broadband Data Collection, based on 629 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Unwired Fixed Wireless	300 / 25
Verizon Fixed Wireless	300 / 20
Etheric Networks Fixed Wireless	250 / 100
AT&T Fixed Wireless · DSL	100 / 20
T-Mobile Fixed Wireless	100 / 20