| Primary address | 971 Helen Avenue, Sunnyvale |
| Zip code | 94086 |
| County | Santa Clara |
| Tract | 2559 |
| Parcel ID | 213-36-019 |
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Property tax | $4,938 |
| Building sqft | 3,366 |
| Building class | Five or More Family (04) |
| Acreage | 0.2 |
| Lot sqft | 8,978 |
| Units | 6 |
| Year built | 1961 |
| Stories | 2 |
| Zoning district | Register |
| School district | 09023 |
View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.
Property reports include comprehensive occupancy, improvement and development information (where available).
Create a free account to access valuable data points such as:
971 Helen Avenue, Sunnyvale, CA 94086 was built in 1961 and has a total of 3,366 square feet.
What is the assessed value of 971 Helen Avenue, Sunnyvale, CA 94086 and the property tax paid?Assessed at $427,431, the tax amount paid for 971 Helen Avenue, Sunnyvale, CA 94086 is $4,937.
When was 971 Helen Avenue, Sunnyvale, CA 94086 last sold?971 Helen Avenue, Sunnyvale, CA 94086 was last sold in 08/23/2019.
How many residential units does this building have?This building has 6 residential unit(s).
View detailed property contacts like owners, building management, representatives from permits and tenants with a free account.
Create a free account to view the complete sales history for 971 Helen Avenue, Sunnyvale, including title documents, transfer conditions, mortgages and liens.
To view the complete history of deeds, mortgages, assignments of leases and rents, and more, sign up for free. Available data goes back to 1966.
R: Recorded date
D: Document date
Access detailed property tax data for 971 Helen Avenue, Sunnyvale, CA 94086. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year: | 2025-2026 |
| Property tax | $4,938 |
| Market value | $427,431 |
Here's the assessment & property tax history for 971 Helen Avenue, Sunnyvale, including the evolution of the total tax rate and corresponding property tax.
| Year | Assessment value | Total tax rate | Property tax | Year over year change |
|---|---|---|---|---|
| 2025-2026 | $427,431 | 1.1552 | $4,938 | +1.36% |
| 2024-2025 | $419,051 | 1.1625 | $4,871 | +1.02% |
| 2023-2024 | $410,836 | 1.1738 | $4,822 | +1.76% |
| 2022-2023 | $402,781 | 1.1766 | $4,739 | +0.34% |
| 2021-2022 | $394,884 | 1.196 | $4,723 | +1.85% |
The complete history of permits filed for 971 Helen Avenue, Sunnyvale, including new construction or demolition permits, plus any work pertaining to plumbing, heating and sprinkler systems is available with a free account. Available data goes back to 1990.
| Total population | 49,746 |
| Median age | 33.5 |
| Average household income | $233,401 |
| Family households | 54.9% |
| Occupied housing units | 20,832 |
| Owner occupied units | 30.5% |
| Average number of people per household | 2.38 |
| Median year structure built | 1977 |
| Median value for units with a mortgage | $1,869,300 |
| Median value for units without a mortgage | $1,684,500 |
Create a free account to unlock extended information for 971 Helen Avenue, Sunnyvale, including whether it's located in FEMA flood zones, floodways or special flood hazard areas, as well as the Coastal barriers resources system area (COBRA).
| FEMA flood zone(s) | 0.2 (See more on map) |
| Fire hazard zone | See more on map |
| Faults and tsunami inundation zone map | Register |
| Landslides and liquefaction map | Register |
Access the detailed traffic volume map for 971 Helen Avenue, Sunnyvale to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.
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Here are the neighbors for 971 Helen Avenue, Sunnyvale.
| Address | Square feet | Purchase date | Purchase price |
|---|---|---|---|
| 1053 E El Camino Real, Sunnyvale | 10,900 | 01/23/2001 | $1,596,500 |
| 987 Helen Ave, Sunnyvale | 3,380 | 03/12/2021 | |
| 993 Helen Ave, Sunnyvale | 2,764 | 10/19/2021 | $1,950,000 |
| 1073 E El Camino Real, Sunnyvale | 1,000 | 02/25/2022 | |
| 902 Suntree CT, Sunnyvale | 3,125 | 07/05/2022 | |
| 953 Helen Ave, Sunnyvale | 9,782 | 07/18/2014 | |
| 916 Suntree CT, Sunnyvale | 2,803 | 11/18/2014 | |
| 954 Helen Ave, Sunnyvale | 5,180 | 10/01/2025 | |
| 1063 E El Camino Real, Sunnyvale | 1,176 | 01/23/2001 | $1,596,500 |
| 1051 E El Camino Real, Sunnyvale | 2,751 | 12/10/2019 | |
| 920 Tamarack Ln, Sunnyvale | 4,102 | 12/20/2012 | |
| 901 Suntree CT, Sunnyvale | 2,564 | 07/01/1997 | $370,000 |
| 974 Helen Ave, Sunnyvale | 2,764 | 01/28/1998 | |
| 991 Helen Ave, Sunnyvale | 2,764 | 03/14/2013 | |
| 947 Tamarack Ln, Sunnyvale | 4,004 | 02/25/2004 | |
| 929 Tamarack Ln, Sunnyvale | 13,608 | 02/24/2021 | |
| 978 Helen Ave, Sunnyvale | 2,764 | 10/29/2019 | |
| 973 Helen Ave, Sunnyvale | 2,764 | 07/03/2025 | |
| 995 Helen Ave, Sunnyvale | 2,764 | 03/21/2008 | |
| 965 Helen Ave, Sunnyvale | 3,366 | 08/23/2019 |