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1929-1931 Union St

Cow Hollow, SF 94123 0542036 4 units · 2 fl · 1900

This building has more problems than most buildings in this neighborhood. 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 1929-1931 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
4 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
Units4
Floors2
Year built1900
Total area3,895 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0542036
Ownership

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

Owner name
Wes Renzas Lvg Tr
Mailing address
Renzas Wesley Lowell Jr Tru 151 Stanford Way Sausalito CA 94965
Last sale
102616

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.

1929 Union St, San Francisco, CA 94123
1931 Union St, San Francisco, CA 94123
Augrented Insights
Initial analysis

The property at 1929-1931 Union Street is a two-story, four-unit multi-family residential building with commercial space, located in San Francisco's Cow Hollow neighborhood. Built in 1900 and currently owned by Wes Renzas Lvg Tr, the building has undergone several significant improvements over the past two decades. Most notably, in late 2013, comprehensive kitchen renovations were completed in both units, including updates to sinks, faucets, dishwashers, garbage disposals, and microwaves, with associated electrical and plumbing work totaling approximately $10,875. Earlier renovations in the early 2000s addressed various structural and maintenance issues, including window replacements, dry rot repairs, and roof work above the ground-level store, though some permits from this period are now expired.

The building's recent history includes a fire complaint regarding Shared Spaces from August 2021 that was deferred and closed in February 2023, and a malfunctioning smoke detector incident with no civilian injuries. The property has experienced several environmental maintenance issues in 2024, including reports of graffiti, blocked sidewalks, and garbage/debris on public areas, all of which have been resolved through appropriate channels. There is currently an open case from May 2024 regarding scooter-related services, and a tree maintenance issue reported in December 2024. The building's maintenance record shows consistent attention to basic upkeep and modernization, though the recent cluster of 311 calls in 2024 primarily relates to external, public space issues rather than building-specific problems.

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

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Risk rating

How 1929-1931 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
27th percentile

Out of 861 buildings in this neighborhood, 629 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
62%
No DBI
violation
38%
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.

Number of units

The number of units affects how the model reads complaint and violation totals — more units means more potential sources.

Property class: apartment building

Apartment building — this property classification influences expected violation rates.

Neighborhood (ZIP code)

The ZIP code captures local housing market and enforcement patterns that affect all buildings in the area.

12-Month severity forecast
No violation 34.3%
Moderate concern 16.8%
Severe concern 48.9%
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

1929-1931 Union St event timeline

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

2021
Fire Complaint Aug 23
Shared Spaces
Deferred

See all 1 events

Full history back to 2021 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 1929-1931 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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