Santa Clara County  »  990 Helen Ave

990 Helen Avenue, Sunnyvale, CA 94086 - Property report

Also known as: 990 Helen Ave

Property image for 990 Helen Avenue, Sunnyvale, CA 94086
static Mapbox map

Property type

Three and Four Family (03)

Year built

1961

Acreage

0.19

Sale price

$1,800,000

General Information

Address
Primary address
990 Helen Ave
Sunnyvale, CA 94086
Alternate address(es)
992 Helen Ave
Zip code
94086
County
Santa Clara
Municipality
Sunnyvale
Parcel ID
213-35-019
Tract
2384

Owner

Find out who owns 990 Helen Avenue, Sunnyvale, CA 94086. Uncover corporate and individual owners with a free account.

Sales
Sale date
12/30/2022
Sale price
$1,800,000
Arm's length
Tax
Tax year
2025-2026
Property tax
$21,634
Tax per sq. ft.
$8
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 990 Helen Avenue, Sunnyvale, CA

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

Sales history for 990 Helen Avenue, Sunnyvale, CA 94086

Sale date Sale price Buyer name Seller name
12/30/2022 $1,800,000 XXXX, XXXX; XXXX, XXX XXX XXXX XXX XXXXXXX XXX
04/17/2012 $917,000 XXXX & XXXXXXX XXX XXX, XXXXX; XXXX, XXXXXX XXX
01/19/2007 $895,000 XXXX, XXXXXX XXX XXXX, XXXXX X

*Most recent sales on record for this property.

More about Santa Clara County property records.

Title documents

Date Type Amount Party 1 Party 2
10/27/2025 Agreement
Assignment of Rents and Leases
Deed of Trust
Fixture Filing		 XXXX, XXX XXX XXXXXXXX XXXXXXXXXX XXXXXXXXXXXX XXXXXXX XXX
12/30/2022 Grant Deed XXXX XXX XXXXXXX XXX XXXX, XXX XXX
12/17/2012 Deed of Trust/Mortgage/Securit XXXX, XXXX XX XXXXX XXXXX XX
04/17/2012 Grant Deed XXXX, XXXXXX XXX XXXX & XXXXXXX XXX
08/30/2011 Deed of Trust/Mortgage/Securit XXXX, XXXXXX XXX XXXXXXXX XXXXX XX
01/19/2007 Deed XXXX, XXXXX X XXXX, XXXXXX XXX
12/21/2004 Deed XXXXXX XXXX XXXXX XXXX, XXXXX XX XXXX
12/21/2004 Deed XXX, XXXXXXX X XXXX, XXXXX X
12/21/2004 Deed XXXXXX, XXXX X XXXX, XX X X
12/07/1998 Deed XXXXXX, XXXX X & XXXXX X XXXXXX XXXXX

*Most recent recorded documents on file for this property.

R: Recorded date
D: Document date

Tax

Property taxes for 990 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
2025-2026
Property tax
$21,634
Tax per sq. ft.
$8
Recent tax assessments
Market value
$1,872,720
Land value
$1,456,560
Building value
$416,160

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 $1,872,720 1.1552 $21,634 +1.36%
2024-2025 $1,836,000 1.1625 $21,344 +1.02%
2023-2024 $1,800,000 1.1738 $21,128 +65.45%
2022-2023 $1,085,359 1.1766 $12,770 +0.35%
2021-2022 $1,064,078 1.196 $12,726 +1.84%
2020-2021 $1,053,169 1.1865 $12,496 +0.13%
2019-2020 $1,032,520 1.2086 $12,479 +7.90%
2018-2019 $1,012,276 1.1425 $11,565 -0.36%
2017-2018 $992,429 1.1696 $11,607 +3.02%
2016-2017 $972,971 1.158 $11,267 +0.35%
Permits

Permit information for 990 Helen Avenue, Sunnyvale, CA

Issued date Permit number Permit type Sub type Valuation Finaled date Status
05/04/2026
04/15/2026
07/22/2013

*Most recent permits 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 990 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 0.45
St. Lawrence Elementary and Middle School NR Private PK-8 236 0.45
Silicon Valley Academy NR Private K-12 121 0.58
Silicon Valley Academy NR Private PK-8 146 0.63
Silicon Valley Academy NR Private PK-8 146 0.63
Ponderosa Elementary School 5 Public K-5 501 0.67
Briarwood Elementary School 4 Public K-5 287 0.75
Pomeroy Elementary School 3 Public K-5 300 0.84
Laurelwood Elementary School 8 Public K-5 521 0.86
Nearest middle schools

Name Rating Type Grade range No of students Distance (miles)
St. Lawrence Elementary and Middle School NR Private PK-8 236 0.45
Marian A. Peterson Middle School 6 Public 6-8 729 0.58
Silicon Valley Academy NR Private K-12 121 0.58
Silicon Valley Academy NR Private PK-8 146 0.63
School of Choice NR Private 6-12 0 0.68
Stratford Middle School NR Private 6-8 443 0.80
Santa Clara Community Day NR Public 6-12 10 1.02
Juan Cabrillo Middle School 5 Public 6-8 817 1.59
Nearest high schools

Name Rating Type Grade range No of students Distance (miles)
New Valley Continuation High School 3 Public 9-12 169 0.31
Silicon Valley Academy NR Private K-12 121 0.58
School of Choice NR Private 6-12 0 0.68
Llatino High School NR Private 9-12 0 0.90
Santa Clara Community Day NR Public 6-12 10 1.02
Live Oak Academy NR Private 1-12 120 1.11
Adrian Wilcox High School 7 Public 9-12 1,859 1.15
Santa Clara High School 7 Public 9-12 1,849 1.18
Cedarwood Sudbury School NR Private 1-2, 9-12 0 1.59
Fremont High School 7 Public 9-12 2,171 1.84

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

Neighbors for 990 Helen Avenue, Sunnyvale, CA

1184 Myrtle Dr, Sunnyvale 902 Suntree CT, Sunnyvale 926 Tamarack Ln, Sunnyvale 954 Helen Ave, Sunnyvale 916 Suntree CT, Sunnyvale 920 Tamarack Ln, Sunnyvale 1136 Myrtle Dr, Sunnyvale 974 Helen Ave, Sunnyvale 901 Suntree CT, Sunnyvale 994 Helen Ave, Sunnyvale 986 Helen Ave, Sunnyvale 978 Helen Ave, Sunnyvale 929 Tamarack Ln, Sunnyvale 947 Tamarack Ln, Sunnyvale 1012 Helen Ave, Sunnyvale 902 Tamarack Ln, Sunnyvale 1196 Myrtle Dr, Sunnyvale 1190 Myrtle Dr, Sunnyvale 849 Sweetbay Dr, Sunnyvale 914 Tamarack Ln, Sunnyvale

Nearby ZIP codes for 990 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 990 Helen Avenue, Sunnyvale, CA 94086?

The development at 990 Helen Avenue, Sunnyvale, CA 94086 was built in 1961.

What is the total square footage of 990 Helen Avenue, Sunnyvale, CA 94086?

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

When was 990 Helen Avenue, Sunnyvale, CA 94086 last sold and what was the sale price?

990 Helen Avenue, Sunnyvale, CA 94086 was last sold on 12/30/2022 for $1,800,000.

What is the assessed value of 990 Helen Avenue, Sunnyvale, CA 94086?

990 Helen Avenue, Sunnyvale, CA 94086 is currently assessed at $1,872,720.

What are the property taxes for 990 Helen Avenue, Sunnyvale, CA 94086?

The property taxes for 990 Helen Avenue, Sunnyvale, CA 94086 total $21,633.

How many residential units does this building have?

This building has 4 residential unit(s).

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