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350 Union St

Telegraph Hill, SF 94133 0105019 90 units · 3 fl · 1965

This building has far more open problems than almost any other in the neighborhood. Renters here report frequent, slow-to-fix problems. Get repair promises in writing and check the unit before signing.

NOVs (7y) vs. neighborhood
Compared to a typical building in Telegraph Hill
At or below average
avg 1.2
1
FewerMore

This building has 1 novs (7y), at or below the Telegraph Hill average of 1.2.

Rent & eviction protection

Is 350 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 1965
2 or more units
90 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
Units90
Floors3
Year built1965
Total area47,650 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0105019
Ownership

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

Owner name
Trinity G2 Holding Llc
Mailing address
1145 Market St Fl 12 San Francisco CA 94103
Last sale
111617

Landlord portfolio

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

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Augrented Insights
AI summary

350 Union Street is a 90-unit, 3-story multi-family residential building constructed in 1965 located in Telegraph Hill, currently owned by Trinity G2 Holding LLC. The property has undergone several significant safety and maintenance upgrades in recent years, including a fire alarm system replacement in 2019-2020 ($60,000), the installation of new fire alarm booster panels and circuits in 2020, and most recently, reroofing work scheduled for 2024 ($181,350). The building has experienced recurring fire safety issues, with violations noted for alarm system maintenance and sprinkler service requirements in 2020, and a current open violation from October 2023 regarding sleeping area requirements. Multiple fire complaints between 2012 and 2023 have been documented, including issues with blocked exits (2016) and hazardous materials (2021), though most were corrected promptly.

The building has a history of water-related problems, particularly in 2008 when multiple complaints were filed regarding leaks in the courtyard deck, bathroom water damage, and interior water damage. A 2022 inspection raised concerns about the integrity of an old brick retaining wall on the property's west side. Recent maintenance issues include electrical work completed in 2020-2021 focusing on exterior outlets and lighting, with ongoing concerns about potentially overgrown trees and property damage (most recently reported in 2024). The property has experienced several pest-related issues, with a rodent/insect infestation reported in December 2024 and previous complaints about bedbugs and bathroom mold in 2015. A cluster of street space permits was issued between 2012-2019, suggesting regular use of public space around the building for various activities.

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Risk rating

How 350 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
0th percentile

Out of 684 buildings in this neighborhood, 684 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
10%
No DBI
violation
90%
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.

Building size

Total floor area — a proxy for building scale and the number of systems (plumbing, electrical, HVAC) that can fail.

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 4.2%
Moderate concern 90.2%
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.
Apartment reviews

350 Union St apartment reviews

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The story over time

350 Union St event timeline

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

2026
DBI Complaint May 27
Pto was not pulled for new boiler as per plumbing permit: pw20260305121.
Plumbing Inspection Division
Fire ComplaintMay 12
Alarm Systems

See all 19 events

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

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Every record we have

Full data for 350 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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