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1757 Union St

Cow Hollow, SF 94123 0544012 2 units · 2 fl · 1900

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 1757 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 1900
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 built1900
Total area2,760 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0544012
Ownership

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

Owner name
Castellucci Antonio & Rita
Mailing address
Angela Longyear 1757 Union St Ste 2 San Francisco CA 94123
Last sale
102009

Landlord portfolio

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

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Augrented Insights
Initial analysis

The property at 1757 Union Street is a two-unit, two-story multi-family residential building constructed in 1900, with ground-floor commercial space, located in San Francisco's Cow Hollow neighborhood. The building's most significant historical restoration work occurred in the early 1990s, including multiple permits for interior remodeling and electrical work totaling approximately $17,000 for office and showroom improvements. Of particular note is a small fire incident in December 2009 that required electrical wiring repairs in the back of the shop, though these repairs were completed successfully.

The building's recent maintenance history shows regular attention to street-level upkeep, with several 311 calls between 2018 and 2024 primarily related to general street cleaning and debris removal. The most recent incident was reported in August 2024 concerning loose garbage and debris, which was subsequently resolved. There have been minimal building-specific issues in recent years, with the majority of reported cases relating to street maintenance rather than building condition. A tree-related incident was reported and resolved in January 2021, though this was an external matter unrelated to the building itself. The property appears to have maintained regulatory compliance throughout its history, with all major permits having been completed or properly closed out, though several permits from the 1990s did expire or were cancelled during the application process.

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

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Risk rating

How 1757 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
54th percentile

Out of 861 buildings in this neighborhood, 396 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
80%
No DBI
violation
20%
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.

Property class: apartment building

Apartment building — this property classification influences expected violation rates.

Building age

Older buildings tend to have more maintenance challenges; SF's pre-1906 earthquake housing stock carries distinct risk.

Neighborhood location

Precise location is a proxy for neighborhood-level risk — some SF blocks have systematically higher DBI activity.

12-Month severity forecast
No violation 78.7%
Moderate concern 13.8%
Severe concern 7.4%
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

1757 Union St event timeline

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

No dated public records on file yet.
Every record we have

Full data for 1757 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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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

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