421 Medio Ave, Half Moon Bay, CA 94019 Property Records

San Mateo County property record for 421 Medio Ave, Half Moon Bay, CA 94019

Property Summary

Property Type	Single Family Home
Details	3 bd · 4 ba · 3,290 sqft · built 1974
Lot Size	0.287 acres (12,500 sqft)
Owner	2 Trust Names on File
Last Sale	$775,000 (Jun 2004)
Tax Bill	$22,502 (2025)
Deeds & Mortgages	Mar 2021 Mortgage Mar 2021 Transfer
Flood Zone	Zone X (minimal risk)
APN	`048-046-240`

Property Details

APN / Parcel Number

Primary APN	`048-046-240`

Interior

Bedrooms	3 Beds
Full Baths	4 Baths
Total Rooms	9 Rooms
Stories	2 Stories
Building Area	3,290 sqft Living Area
1st Floor Area	1,910 sqft
2nd Floor Area	1,380 sqft
Family Room	Family Room

Exterior

Year Built	Built 1974
Effective Year Built	Effective 1974
Lot Area	12,500 sqft (0.287 acres)
Lot Dimensions	100 ft deep x 125 ft wide
View / Lot	Corner
Garage Area	900 sqft
Parking Spaces	4 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Street Address	421 MEDIO AVE
City	HALF MOON BAY
State	CA
Zip	94019-5120
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R10006
Legal Description	LOTS 25 26 27 28 29 BLK 8 SOUTH BALBOA TRACT RSM 5/6
Legal Subdivision	SOUTH BALBOA
Legal Block	8
Legal Lot Number	25
Jurisdiction	SAN MATEO CA
Township / Civil Division	HALF MOON BAY
Census Block Group	2
Census Block	2003
Census Tract	613502

Owner

421 Medio Ave is held in a trust since March 2021.

Source: San Mateo County records, as of July 15, 2026

Owner of Record	2 Trust Names on File
Mailing Address	421 MEDIO AVE, HALF MOON BAY, CA 94019-5120
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 11, 2021	Deed of Trust, Mortgage · Conventional Mortgage UNITED WHOLESALE MORTGAGE
Mar 11, 2021	Correction Deed FIDELITY NATIONAL TITLE

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jun 8, 2004 · Amount on File
Deed Sale	Jun 8, 2004 · Amount on File
Deed Document Number	2004118684
Last Transfer Date	Mar 3, 2021
Transfer Doc	0000039879
Record Updated	Oct 29, 2026

March 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	SAN MATEO CA
Property Address	421 MEDIO AVE, HALF MOON BAY, CA 94019-5120
Transaction Type	Mortgage
Record Updated	May 30, 2023
Title Company	FIDELITY NATIONAL TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	421 MEDIC AVE, HALF MOON BAY, CA 94019-5120

Mortgage

Document Number	0000039880
Date	Mar 11, 2021
Instrument	2021-039880

Lender

Name	UNITED WHOLESALE MORTGAGE
Type	Mortgage Company
Address	PONTIAC, MI 48341

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	181 Months
Due	Apr 1, 2036

March 2021: Correction Deed

Document Type	Correction Deed
Jurisdiction	SAN MATEO CA
Recording Date	Mar 11, 2021
Property Address	421 MEDIO AVE, HALF MOON BAY, CA 94019-5120
Document Number	0000039879
Map Reference	MB 5 PG 6
Instrument Date	Mar 3, 2021
Instrument	2021-039879
Record Updated	May 30, 2023
Title Company	FIDELITY NATIONAL TITLE

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	421 MEDIO AVE, HALF MOON BAY, CA 94019-5120

Tax Assessment & Valuation

The 2025 property tax bill for 421 Medio Ave was $22,502.

Source: San Mateo County assessment roll, as of July 15, 2026

Property Jurisdictions

Type	Name
State	California
County	San Mateo County
Unified School District	Cabrillo Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$1,892,301 (+2%) Land $561,954 Building $1,330,347
2025	$22,502.00	$1,855,199 Land $550,936 Building $1,304,263
2023	$20,475.00 (+1.82%)	$1,783,163 Land $529,544 Building $1,253,619	$2,120,130
2022	$20,109.00

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

Flood

FEMA maps place 421 Medio Ave in Zone X, an area of minimal flood risk.

Source: FEMA National Flood Hazard Layer, effective September 10, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on File median of 16 policies
Community Rating System	Class 8 (10% premium discount)
Nearby Flood Policies	16 in force

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 421 Medio Ave is low, with a 0.05% annual chance of wildfire.

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

Wildfire Risk	Low lower than 62% of the US · lower than 77% of California
Wildfire Likelihood	0.05% annual chance
Exposure	Indirect within 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	COASTSIDE COUNTY WATER DISTRICT serves 19,033 people · EPA ID CA4110011
Water Source	Surface water
Last State Inspection	Jul 2023
Lead	2 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.

Internet Providers

Source: FCC Broadband Data Collection, based on 234 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Cruzio Fixed Wireless	1,000 / 1,000
Verizon Fixed Wireless	300 / 20

May also be available: AT&T.

Cell Coverage

5G (outdoors only) and 4G LTE

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