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1680-1682 Union St

Cow Hollow, SF 94123 0528009A 2 units · 2 fl · 1922

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 1680-1682 Union 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 1922
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
UNION
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 built1922
Total area3,100 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0528009A
Ownership

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

Owner name
California 1 Llc
Mailing address
1901 Lawton St San Francisco CA 94122
Last sale
022004

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.

1680 Union St, San Francisco, CA 94123
1682 Union St, San Francisco, CA 94123
Augrented Insights
Initial analysis

The two-unit, two-story multi-family residential building at 1680-1682 Union Street in Cow Hollow, owned by California 1 LLC, has a documented history dating back to its construction in 1922. The building has undergone several maintenance and improvement projects over the years, including a significant $24,000 reroofing project in 2011 and stair repair work in 1993. A noteworthy incident occurred in late 2019 when unpermitted work in a basement unit allegedly caused flooding and damage to tenant property, though this complaint is listed as not active in the system. The building has experienced various maintenance issues, including a sewage backup in 2019 that required immediate repairs, and a blocked exit violation that was promptly corrected in 2010.

The property has faced multiple incidents of graffiti and sidewalk obstruction between 2017-2023, with several involving public infrastructure like mailboxes and sidewalks, though these are not directly related to the building's condition. In 2018, there was a sewer vent issue requiring urgent attention. A proposed project from 2002 to raise the top two stories and add a new story was ultimately cancelled. A carbon monoxide detector activation was recorded at some point, though no civilian injuries were reported. The building's maintenance history shows regular upkeep in the form of reroofing and stair repairs, while the 2019 incident remains the most concerning from a resident safety perspective, despite not being classified as an active complaint.

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

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Risk rating

How 1680-1682 Union 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
36th percentile

Out of 861 buildings in this neighborhood, 551 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
70%
No DBI
violation
30%
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.

Permit rate, owner's portfolio

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

Construction spend, owner's portfolio

Estimated permit value across all of this owner's buildings.

12-Month severity forecast
No violation 68.5%
Moderate concern 23.6%
Severe concern 7.8%
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

1680-1682 Union St event timeline

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

2026
Plumbing Permit Mar 09
Remodel two bathrooms, one kitchem and one laundry room.
Issued

See all 4 events

Full history back to 2019 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 1680-1682 Union St apartments

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

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