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1668-1670 Filbert St

Cow Hollow, SF 94123 0521012 2 units · 2 fl · 1949

This building has a higher-than-average number of open problems nearby. Few open issues; problems get fixed quickly. A reasonable bet for a smooth tenancy.

NOVs (7y) vs. neighborhood
Compared to a typical building in Cow Hollow
At or below average
avg 0.7
0
FewerMore

This building has 0 novs (7y), at or below the Cow Hollow average of 0.7.

Rent & eviction protection

Is 1668-1670 Filbert St rent-controlled?

San Francisco's Rent Ordinance caps rent increases and provides eviction protection for most residential units built before 1979 with 2+ units. Here's how this building scores.

Built before 1979
Built 1949
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RH3
Likely rent-controlled. Building age and unit count suggest this property falls under San Francisco's Rent Ordinance.

Based on SF Assessor records. Not legal advice — confirm with the SF Rent Board.

Building characteristics
Units2
Floors2
Year built1949
Total area3,000 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0521012
Ownership

Registered owner per SF Assessor-Recorder (secured roll).

Owner name
Leong Andrew J
Mailing address
910 Governors Bay Dr Redwood City CA 94065
Last sale
000000

Landlord portfolio

Other SF properties this owner holds, with risk grades for each.

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Multiple entrances & addresses

Included addresses

All street addresses sharing this blocklot that are covered by this report.

1670 Filbert St, San Francisco, CA 94123
1668 Filbert St, San Francisco, CA 94123
Augrented Insights
Initial analysis

The two-unit multi-family residential building at 1668-1670 Filbert Street in the Cow Hollow neighborhood, owned by Andrew J. Leong, was constructed in 1949 and is classified as a two-story flats and duplex structure. The property has undergone several significant maintenance and improvement projects over the years, most recently including a complete reroofing in 2022 costing $12,000. Other notable improvements include kitchen cabinet replacements in 2008 ($6,400), electrical upgrades on the first floor in 2008, and the installation of new water heaters in 2014. The building's window replacements date back to the 1980s and 1990s, and the property has maintained compliance with various infrastructure requirements, including sidewalk repair work in 2001.

Of particular concern is a recent building complaint filed in February 2023 regarding alleged illegal construction in the garage, with claims of unauthorized apartment conversion and noise disturbances, though this case is currently listed as not active. Between 2021 and 2024, there have been several reported instances of waste management issues and parking violations in the vicinity of the property, including multiple cases of driveway blocking in late 2024 and several incidents involving waste on public sidewalks in 2021. An environmental health complaint was filed in August 2021, and tree maintenance issues were reported in November 2018 regarding an overgrown tree near communication lines, though these matters were subsequently resolved. The building's permit history suggests regular maintenance and updates over the years, with the most recent significant work being infrastructure-related rather than cosmetic or structural.

AI-generated · may contain errors · check the source data tables below

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Risk rating

How 1668-1670 Filbert St's risk score is calculated

We trained a model on 7 years of SF DBI inspection data — notice of violation filings, complaint history, and owner track records. It estimates the probability that DBI inspectors will issue a Notice of Violation at this address in the next 12 months. Lower % = safer.

What the score means for you

Grade A–B — Low risk

DBI rarely finds violations here. Strong maintenance history and a clean complaint record.

Grade C — Moderate risk

Some past violations or complaints on record. Worth asking the landlord about any open issues before signing.

Grade D–F — High risk

Elevated violation and complaint history. DBI has found issues here before and is statistically likely to again.

Neighborhood percentile
81th percentile

Out of 861 buildings in this neighborhood, 164 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
87%
No DBI
violation
13%
DBI violation
likely
Model explanation

What's driving this score

The three data points that most influenced this building's risk rating — ranked by the weight the model placed on each one.

DBI tenant complaints (past 7 years)

Formal complaints tenants filed with DBI about this building over 7 years.

Estimated permit spend (past 7 years)

Dollar value of permits pulled at this address — large recent spend can signal deferred-maintenance catch-up.

DBI complaint rate, owner's portfolio

Per-building complaint rate across the owner's portfolio.

12-Month severity forecast
No violation 81.9%
Moderate concern 14.2%
Severe concern 3.9%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
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The story over time

1668-1670 Filbert St event timeline

Violations, complaints, fire incidents, permits, and buyouts — most recent records in order.

2023
DBI Complaint Feb 13
16 68-16 70 filbert st. --- 1668 filbert st., illegal construction in the garage. looks to be an additional apartment being built. no permits posted working on sundays with excessive amount of noise. this has been going on for two months. (311 sr 16417197)
Building Inspection Division

See all 2 events

Full history back to 2022 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 1668-1670 Filbert St apartments

13 SF public datasets for this parcel — permits, violations, complaints, fire records, 311 calls, planning records, and buyouts.

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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

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