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1878 Union St

Cow Hollow, SF 94123 0530016 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
Above average
avg 0.7
1
FewerMore

This building has 1 novs (7y), above the Cow Hollow average of 0.7.

Rent & eviction protection

Is 1878 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 area2,090 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot0530016
Ownership

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

Owner name
Serge Matt 2019 Living Trus
Mailing address
Serge Matt Ttee 1882 Union St San Francisco CA 94123
Last sale
040600

Landlord portfolio

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

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Augrented Insights
Initial analysis

The property at 1878 Union Street is a two-unit, two-story multi-family residential building with ground-floor commercial space, constructed in 1900 and currently owned by the Serge Matt 2019 Living Trust. The building has undergone several modifications over the years, with the most recent significant work being completed in April 2023, which involved barrier remediation work to comply with accessibility requirements. A more recent compliance issue arose in December 2022 when it was discovered that an awning had been installed without the proper permits, leading to violations that were ultimately abated in June 2024. Prior to this, the building underwent some exterior improvements in 2007 with two separate awning installations and reroofing work in 2006.

The building's maintenance record shows a concerning pattern in early 2025, with ten separate instances of overflowing city garbage cans reported between January 1 and January 14. These recent sanitation issues, while not directly affecting building safety, may indicate ongoing maintenance challenges. Historical records show minimal serious incidents affecting building safety, with the only notable complaint being a blocked exit reported in December 2013 that was deemed to have no merit upon investigation. Other planning records indicate installation of accessibility features such as a bollard with door actuators, and a change of use to a personal service hair salon at the adjacent 1888 Union Street address, though these modifications are not directly related to the residential portion of the property.

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

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Risk rating

How 1878 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
41th percentile

Out of 861 buildings in this neighborhood, 508 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
73%
No DBI
violation
27%
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.

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.

12-Month severity forecast
No violation 64.6%
Moderate concern 29.8%
Severe concern 5.6%
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

1878 Union St event timeline

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

2023
Building Permit Apr 24
(barrier removal only per 11b-202.4 exc 4). barrier remediation as indentified on plans per abe checklist compliance form. equivalent facilitation (if any) work as shown on plans. abe#201912099567. exterior work only
$2,500 · Complete

See all 3 events

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

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Every record we have

Full data for 1878 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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