Santa Clara County  »  991 Helen Ave

991 Helen Avenue, Sunnyvale, CA 94086 - Property report

Also known as: 991 Helen Ave

Property image for 991 Helen Avenue, Sunnyvale, CA 94086
static Mapbox map

Property type

Three and Four Family (03)

Year built

1961

Acreage

0.19

Sale price

$900,000

General Information

Address
Primary address
991 Helen Ave
Sunnyvale, CA 94086
Zip code
94086
County
Santa Clara
Municipality
Sunnyvale
Parcel ID
213-36-025
Tract
2384

Owner

Find out who owns 991 Helen Avenue, Sunnyvale, CA 94086. Uncover corporate and individual owners with a free account.

Sales
Sale date
04/24/2006
Sale price
$900,000
Arm's length
Tax
Tax year
2026-2027
Property tax
$14,492
Tax per sq. ft.
$5
Building
Property type
Three and Four Family
Building sq. ft.
2,764
Stories
2
Year built
1961
Pool
N
Lot
Acreage
0.19
Zoning & use
Zoning
Medium Density Residential (R3)
Units
4

Area overview

Walk score
80 /100.  Very Walkable
Transit score
42 /100.  Some Transit
Bike score
66 /100.  Bikeable
School district
09023
Ownership

Ownership information for 991 Helen Avenue, Sunnyvale, CA

Property owner name
Registered owner
Source
Deed
Owner contact information
Phone number
Owner address
Documents

Sales history for 991 Helen Avenue, Sunnyvale, CA 94086

Sale date Sale price Buyer name Seller name
04/24/2006 $900,000 XXXXXXX, XXXXX X XX, XXXXXXX & XXXXX
04/18/2003 $803,000 XX, XXXXXXX & XXXXX XXXXXX, XX

*Most recent sales on record for this property.

More about Santa Clara County property records.

Title documents

Date Type Amount Party 1 Party 2
03/14/2013 Grant Deed XXXXXXX, XXXXX XXXXXXX XXXXXX XX
03/13/2013 Deed of Trust/Mortgage/Securit XXXXXXX, XXXXX XXXXX XXXXXXXX XXXXX XXX
03/13/2013 Grant Deed XXXXXXX XXXXXX XX XXXXXXX, XXXXX
11/15/2010 Deed XXXXXXX, XXXXX X XXXXXXX XXXXXX XX
09/10/2010 Deed of Trust/Mortgage/Securit XXXXXXX, XXXXX XX XXX XXXXXXX
04/24/2006 Deed XX, XXXXXXX & XXXXX XXXXXXX, XXXXX X
04/18/2003 Deed XXXXXX, XX XX, XXXXXXX & XXXXX
02/22/1999 Deed XXXXX, XXXXXXX XXXXX, XXXXXXX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 991 Helen Avenue, Sunnyvale, CA

Property tax data includes tax amount, market value and assessed value, exemptions, abatements and assessment history.

Current property tax
Tax year
2026-2027
Property tax
$14,492
Tax per sq. ft.
$5
Recent tax assessments
Market value
$1,254,506
Land value
$1,045,429
Building value
$209,077

More about Santa Clara County Property Taxes

Assessment history

See the assessment and property tax history, including the evolution of the total tax rate and corresponding property tax amount.

Tax year Assessed value Tax rate Property tax Y-o-Y change
2025-2026 $1,229,909 1.1552 $14,208 +1.36%
2024-2025 $1,205,794 1.1625 $14,017 +1.02%
2023-2024 $1,182,152 1.1738 $13,876 +1.76%
2022-2023 $1,158,973 1.1766 $13,636 +0.34%
2021-2022 $1,136,249 1.196 $13,590 +1.85%
2020-2021 $1,124,599 1.1865 $13,343 +0.13%
2019-2020 $1,102,549 1.2086 $13,325 +7.90%
2018-2019 $1,080,931 1.1425 $12,350 -0.36%
2017-2018 $1,059,737 1.1696 $12,394 +3.02%
2016-2017 $1,038,958 1.158 $12,031 +0.35%
Permits

Permit information for 991 Helen Avenue, Sunnyvale, CA

Issued date Permit number Permit type Sub type Valuation Finaled date Status
04/03/2025

*Most recent permit on record for this property.

Neighborhood

Risk

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FEMA flood zones

FEMA flood zones
0.2
Landslides and liquefaction map

Fire hazard zones

Faults and tsunami inundation zones map

Transportation

Daily traffic map
View daily traffic map

Access the detailed traffic volume map for 991 Helen Avenue, Sunnyvale, CA 94086 to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.

Schools

Nearest elementary schools

Name Rating Type Grade range No of students Distance (miles)
St. Lawrence Elementary and Middle School NR Private PK-8 236 0.48
St. Lawrence Elementary and Middle School NR Private PK-8 236 0.48
Silicon Valley Academy NR Private K-12 121 0.57
Silicon Valley Academy NR Private PK-8 146 0.62
Silicon Valley Academy NR Private PK-8 146 0.62
Ponderosa Elementary School 5 Public K-5 501 0.65
Briarwood Elementary School 4 Public K-5 287 0.79
Laurelwood Elementary School 8 Public K-5 521 0.86
Pomeroy Elementary School 3 Public K-5 300 0.87
Braly Elementary School 5 Public K-5 352 1.18
Nearest middle schools

Name Rating Type Grade range No of students Distance (miles)
St. Lawrence Elementary and Middle School NR Private PK-8 236 0.48
Marian A. Peterson Middle School 6 Public 6-8 729 0.55
Silicon Valley Academy NR Private K-12 121 0.57
Silicon Valley Academy NR Private PK-8 146 0.62
School of Choice NR Private 6-12 0 0.67
Stratford Middle School NR Private 6-8 443 0.79
Santa Clara Community Day NR Public 6-12 10 1.04
Juan Cabrillo Middle School 5 Public 6-8 817 1.63
Adult And Community Education NR Public 0 2.00
Nearest high schools

Name Rating Type Grade range No of students Distance (miles)
New Valley Continuation High School 3 Public 9-12 169 0.34
Silicon Valley Academy NR Private K-12 121 0.57
School of Choice NR Private 6-12 0 0.67
Llatino High School NR Private 9-12 0 0.94
Santa Clara Community Day NR Public 6-12 10 1.04
Live Oak Academy NR Private 1-12 120 1.15
Adrian Wilcox High School 7 Public 9-12 1,859 1.18
Santa Clara High School 7 Public 9-12 1,849 1.21
Cedarwood Sudbury School NR Private 1-2, 9-12 0 1.63
Fremont High School 7 Public 9-12 2,171 1.81

Data provided by GreatSchools.org © 2026. All rights reserved.

Neighbors for 991 Helen Avenue, Sunnyvale, CA

1053 E El Camino Real, Sunnyvale 954 Henderson Ave, Sunnyvale 993 Helen Ave, Sunnyvale 1073 E El Camino Real, Sunnyvale 987 Helen Ave, Sunnyvale 902 Suntree CT, Sunnyvale 953 Helen Ave, Sunnyvale 971 Helen Ave, Sunnyvale 916 Suntree CT, Sunnyvale 1063 E El Camino Real, Sunnyvale 1051 E El Camino Real, Sunnyvale 920 Tamarack Ln, Sunnyvale 1232 Henderson Ave, Sunnyvale 900 Henderson Ave, Sunnyvale 947 Tamarack Ln, Sunnyvale 929 Tamarack Ln, Sunnyvale 995 Helen Ave, Sunnyvale 973 Helen Ave, Sunnyvale 1246 Henderson Ave, Sunnyvale 965 Helen Ave, Sunnyvale

Nearby ZIP codes for 991 Helen Avenue, Sunnyvale, CA

94024, Santa Clara County, CA 94041, Santa Clara County, CA 94043, Santa Clara County, CA 95002, Santa Clara County, CA 95014, Santa Clara County, CA 95117, Santa Clara County, CA 95126, Santa Clara County, CA 95128, Santa Clara County, CA 95129, Santa Clara County, CA 95130, Santa Clara County, CA

Frequently asked questions

What is the year built for 991 Helen Avenue, Sunnyvale, CA 94086?

The development at 991 Helen Avenue, Sunnyvale, CA 94086 was built in 1961.

What is the total square footage of 991 Helen Avenue, Sunnyvale, CA 94086?

991 Helen Avenue, Sunnyvale, CA 94086 has a total of 2,764 square feet.

When was 991 Helen Avenue, Sunnyvale, CA 94086 last sold and what was the sale price?

991 Helen Avenue, Sunnyvale, CA 94086 was last sold on 04/24/2006 for $900,000.

What is the assessed value of 991 Helen Avenue, Sunnyvale, CA 94086?

991 Helen Avenue, Sunnyvale, CA 94086 is currently assessed at $1,254,506.

What are the property taxes for 991 Helen Avenue, Sunnyvale, CA 94086?

The property taxes for 991 Helen Avenue, Sunnyvale, CA 94086 total $14,492.

How many residential units does this building have?

This building has 4 residential unit(s).

Disclaimer

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Do not rely on this report to support investment decisions. The only authoritative source for the information in this report is the government agencies from which the data was acquired.

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