Free SF apartment background check

1000 Union St

Russian Hill, SF 94133 0098002 31 units · 4 fl · 1913

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 Russian Hill
Above average
avg 1.9
12
FewerMore

This building has 12 novs (7y), above the Russian Hill average of 1.9.

Rent & eviction protection

Is 1000 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 1913
2 or more units
31 units
Property type
Multi-Family Residential
Zoning
RM2
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
Units31
Floors4
Year built1913
Total area20,624 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0098002
Ownership

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

Owner name
Tierney Trust The
Mailing address
Ronald C Tierney 47 Kearny St Fl 4 San Francisco CA 94108
Last sale
000000

Landlord portfolio

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

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Augrented Insights
Initial analysis

The 31-unit, four-story apartment building at 1000 Union Street in Russian Hill, owned by Tierney Trust, was constructed in 1913 and has undergone several significant improvements over the years. Most recently, in October 2023, emergency deck and roof repairs were required due to water damage, costing $92,000. The building has implemented multiple fire safety upgrades, including a complete fire alarm system overhaul in 2021 with new equipment, sounders, and monitoring systems, along with mandatory soft-story retrofit work completed in 2016 (Tier 2). Significant structural work was performed in 2016 to reinforce distressed concrete walls, and a steam boiler replacement occurred in 2015.

Recent tenant complaints have raised concerning issues, particularly regarding pest control and basic services. Between 2023 and 2024, multiple complaints about rodent infestations were filed, affecting several units throughout the building. More recently, in December 2024, there were reports of recurring hot water issues in unit 301. The building has experienced several fire safety-related incidents, including violations of sleeping area requirements and missed inspections, though many of these issues have subsequently been corrected. There was also one documented cooking fire incident (contained) and four false alarms or calls recorded by the fire department, with no reported civilian injuries in any incidents. The property has undergone regular routine inspections, and while most violations have been resolved, some recent complaints regarding fire escape maintenance and utility requirements were filed in October 2023, though their current status is noted as "Not Active."

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

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Risk rating

How 1000 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
1th percentile

Out of 1133 buildings in this neighborhood, 1122 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
11%
No DBI
violation
89%
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.

DBI tenant complaints (past 7 years)

Formal complaints tenants filed with DBI about this building over 7 years.

12-Month severity forecast
No violation 8.9%
Moderate concern 62.8%
Severe concern 28.3%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

1000 Union St apartment reviews

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The story over time

1000 Union St event timeline

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

2026
DBI Complaint May 06
Date last observed: 05-may-26; exact location: main bldg; building type: residence/dwelling other building; ; additional information: the owner is actively violating the law by not having a true on-site manager, reference 25 ccr sec. 42.;
Housing Inspection Services
311 RequestMar 23
Blocked sidewalk

See all 17 events

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

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Every record we have

Full data for 1000 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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