Free SF apartment background check

2100 Bay St

Marina, SF 94123 0921010 15 units · 3 fl · 1927

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 Marina
At or below average
avg 1.1
0
FewerMore

This building has 0 novs (7y), at or below the Marina average of 1.1.

Rent & eviction protection

Is 2100 Bay 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 1927
2 or more units
15 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.

Statewide backstop · AB 1482

California Tenant Protection Act of 2019

Even when a building isn't covered by local rent stabilization, the statewide Tenant Protection Act (AB 1482) may still apply. It caps annual rent increases and requires the landlord to state a legal reason to end most tenancies.

15+ years since occupancy
Built 1927
Annual rent increase cap
5% + CPI, max 10%
Just-cause eviction
After 12 months
Local rent control likely takes priority. This building appears to fall under the local ordinance above, which is stronger than AB 1482. Where a local just-cause ordinance applies, its rules govern instead of the state cap.

AB 1482 does not apply to single-family homes and condos unless owned by a corporation, REIT, or an LLC with a corporate member; to owner-occupied duplexes; or to deed-restricted affordable housing. The Act is in effect until January 1, 2030. Not legal advice — see the California landlord–tenant guide.

Building characteristics
Units15
Floors3
Year built1927
Total area11,100 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0921010
Ownership

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

Mailing address
601 Van Ness Ave #e3-624 San Francisco CA 94102
Last sale
011797

Landlord portfolio

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

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Augrented Insights
Initial analysis

The 15-unit, 3-story apartment building at 2100 Bay Street in the Marina neighborhood, owned by 2100 Bay Street LLC, has a complex history dating back to its 1927 construction. Most recently, in 2024-2025, the building has experienced fire safety issues, with violations documented in late 2023 and late 2024 regarding alarm systems and sleeping area requirements, respectively. A significant permit was filed in January 2025 for upgrading the fire alarm system to meet current California/San Francisco requirements, including installing low-frequency horns and wireless monitoring. The building has undergone various maintenance and safety-related modifications over the years, including a steam boiler replacement in 2017, reroofing work in 2003, and fire safety improvements in 2002-2003 following multiple violations related to unauthorized storage room conversions, inadequate fire separation, and improper fire sprinkler installations.

The property has a record of routine housing inspections from 1999 through 2014, during which various maintenance issues were identified and subsequently addressed. Historical concerns include heating system problems in the late 1990s and early 2000s, unauthorized modifications to storage rooms, and fire safety compliance issues. Recent 311 calls (2021-2024) primarily relate to sidewalk maintenance, waste removal, and street cleaning, while the building has experienced only one documented cooking-related fire incident with no injuries. The property currently has one open fire violation from November 2024 regarding sleeping area requirements, though a recent alarm system violation from September 2023 has been abated. The building's management has generally responded to violations and completed necessary repairs, as evidenced by the completion status of most historical permits and violations.

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

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Risk rating

How 2100 Bay 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
24th percentile

Out of 988 buildings in this neighborhood, 751 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
53%
No DBI
violation
47%
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.

Owner's portfolio size

Number of SF parcels this owner is registered on — larger portfolios have distinct risk patterns.

12-Month severity forecast
No violation 42.6%
Moderate concern 27.5%
Severe concern 29.9%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

2100 Bay St apartment reviews

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On the map

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The story over time

2100 Bay St event timeline

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

2025
311 Request Oct 26
Rent board
rent board request for service
Building PermitJul 31
Revision to permit 202501067731 (fire alarm). change of as builts / device count.

See all 10 events

Full history back to 2020 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 2100 Bay 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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