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421 Cumulus Ave, Sunnyvale, CA 94087 Property Records

Santa Clara County property record for 421 Cumulus Ave, Sunnyvale, CA 94087

Property Summary

Property TypeSingle Family Home
Details4 bd · 4 ba · 2,629 sqft · built 2012
Lot Size0.155 acres (6,783 sqft)
OwnerTrust Name on Record
Last Sale$400,000 (Apr 2010)
Tax Bill$13,646 (2025)
Deeds & MortgagesAug 2020 Transfer
Aug 2020 Transfer
Flood ZoneZone X (moderate risk)
APN211-19-045

Property Details

APN / Parcel Number

Primary APN211-19-045

Interior

Bedrooms4 Beds
Full Baths4 Baths
Total Rooms8 Rooms
Stories2 Stories
Building Area2,629 sqft Living Area
1st Floor Area1,553 sqft
2nd Floor Area1,076 sqft
Family RoomFamily Room
FireplaceFireplace
ElevatorElevator

Exterior

Year BuiltBuilt 2012
Architectural StyleOther
Construction TypeWood
Lot Area6,783 sqft (0.155 acres)
Lot Dimensions119 ft deep x 57 ft wide
Garage Area447 sqft
Parking Spaces2 Parking Spaces

Utilities, Heating & Cooling

Cooling SystemHVAC
Heating SystemHVAC

Location & Zoning

Street Address421 CUMULUS AVE
CitySUNNYVALE
StateCA
Zip94087-1450
Property CategoryResidential
Property TypeResidential > Single Family > Home
Local Zoning CodeR1
Legal DescriptionLOT 3 BOOK 382 PAGE 26
Legal SubdivisionWALNUT ARBOR
Legal Lot Number3
JurisdictionSANTA CLARA CA
Township / Civil DivisionSAN JOSE
Census Block Group1
Census Block1008
Census Tract508503

Owner

Source: Santa Clara County records, as of October 20, 2025

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of RecordTrust Name on Record
Co-ownerCo-owner on Record
Mailing Address421 CUMULUS AVE, SUNNYVALE, CA 94087-1450
OccupancyOwner Occupied
Owner TypeIndividual
VestingTrust

Deeds, Mortgages & Sale History

DateDocument
Aug 12, 2020Quit Claim Deed, Transfer
ATTORNEY ONLY
Aug 27, 2020Quit Claim Deed, Transfer
ATTORNEY ONLY

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleApr 15, 2010 · Amount on Record
Deed SaleApr 15, 2010 · Amount on Record
Prior SaleAug 12, 2020
Deed Document Number0020678615
Last Transfer DateAug 27, 2020
Transfer Doc0024591917
Record UpdatedJun 8, 2026

August 2020: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionSANTA CLARA CA
Recording DateAug 12, 2020
Property Address421 CUMULUS AVE, SUNNYVALE, CA 94087-1450
Document Number0024573650
Instrument DateJul 23, 2020
Instrument24573650
Transaction TypeTransfer
Record UpdatedAug 31, 2020
Title CompanyATTORNEY ONLY

Transaction

Tax$0.00
Amount AccuracyFull Value
Additional
  • Quitclaim
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address421 CUMULUS AVE SUNNYVALE CA 940871450, SUNNYVALE, CA 94087-1450

August 2020: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionSANTA CLARA CA
Recording DateAug 27, 2020
Property Address421 CUMULUS AVE, SUNNYVALE, CA 94087-1450
Document Number0024591917
Instrument DateJul 23, 2020
Instrument24591917
Transaction TypeTransfer
Record UpdatedSep 15, 2020
Title CompanyATTORNEY ONLY

Transaction

Tax$0.00
Additional
  • Quitclaim
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipLiving Trust
Address421 CUMULUS AVE SUNNYVALE CA 940871450, SUNNYVALE, CA 94087-1450

Tax Assessment & Valuation

Source: Santa Clara County assessment roll, as of July 1, 2025

Property Jurisdictions

TypeName
StateCalifornia
CountySanta Clara County
MunicipalitySunnyvale City
Secondary School DistrictFremont Union High School District (09 - 12)
Elementary School DistrictSunnyvale Elementary School District (KG - 08)

Tax Bill & Assessment History

YearTax BillAssessed Value
2025$13,646.00 (+5.03%) Homeowner's exemption$1,162,818 (+4.04%) Land $516,324 Building $646,494
2023$12,993.00 (+1.97%) Homeowner's exemption$1,117,666 Land $496,275 Building $621,391
2022$12,742.00

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

Flood

Source: FEMA National Flood Hazard Layer, effective January 18, 2026

FEMA Flood ZoneZone X
moderate risk
500-Year FloodplainYes
0.2% annual chance
Flood Insurance RequirementNot required
lenders may require it

Values are read at the parcel center point; lenders make the official flood determination.

Wildfire

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

Wildfire RiskNot rated
no burnable land 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 SystemCITY OF SUNNYVALE
serves 157,566 people · EPA ID CA4310014
Water SourcePurchased surface water from several systems
Last State InspectionSep 2024
LeadUnder 1 ppb (2023–2025)
action level 15 ppb

Violations Reported to EPA

Water QualityNone
last 10 years
Treatment and ProcedureNone
last 10 years
Monitoring and Reporting63
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 281 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
Xfinity
Cable		2,000 / 250
Etheric Networks
Fixed Wireless		250 / 100
Ridge Wireless
Fixed Wireless		100 / 60
T-Mobile
Fixed Wireless		100 / 20
AT&T
DSL · Fiber, Fixed Wireless in parts of the area		100 / 20

May also be available: GeoLinks, Sail Internet, Verizon.

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