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305 23Rd Ave

Central Richmond, SF 94121 1455001 10 units · 3 fl · 1923

This building has far more open problems than almost any other in the neighborhood. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood
Compared to a typical building in Central Richmond
At or below average
avg 0.5
0
FewerMore

This building has 0 novs (7y), at or below the Central Richmond average of 0.5.

Rent & eviction protection

Is 305 23Rd Ave 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 1923
2 or more units
10 units
Property type
Multi-Family Residential
Zoning
OTCLEM
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
Units10
Floors3
Year built1923
Total area7,175 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1455001
Ownership

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

Owner name
Chin Tyrone G F&Helen T Rev
Mailing address
Tyrone G F &helen T Chin 759 18Th Ave San Francisco CA 94121
Last sale
011497

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.

2201 Clement St, San Francisco, CA 94121
2205 Clement St, San Francisco, CA 94121
305 23rd Ave, San Francisco, CA 94121
Augrented Insights
Initial analysis

The 10-unit, 3-story multi-family residential building at 305 23rd Avenue in the Central Richmond neighborhood, built in 1923 and currently owned by Tyrone G Chin and Helen T Rev Trust, has undergone various significant improvements and faced recurring safety compliance issues over the past decades. Most recently, in May 2024, the property completed awning legalization work for both "Thanh Thanh Cafe" and "Honey Bee Tea House" as part of the awning amnesty program, with associated permits still under processing. The building has a documented history of fire safety concerns, with multiple fire-related complaints and violations between 2009 and 2024 regarding blocked exits, extinguisher maintenance, and alarm systems, though most have been resolved promptly. A notable cluster of building violations occurred in March-June 2005, including issues with fire escape ladders, alarm panels, and directional signs, all of which were abated by June 2005.

The property's maintenance record shows regular upkeep, including a complete reroofing in 2003 and exterior fire escape repairs in 2018 (costing $5,800) involving work on two fire escapes, replacement of a post and stringer, and associated sanding and painting. The building has experienced multiple routine housing inspections, with the most recent fire safety violations being corrected in 2024 (exit maintenance) and 2021 (alarm systems). Recent 311 calls from late 2024 to early 2025 indicate ongoing issues with garbage and debris outside the property, though many of these were marked as resolved. The building's history shows a pattern of prompt response to violations and maintenance issues, with most problems being addressed within reasonable timeframes and proper permits obtained for significant modifications or repairs.

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

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Risk rating

How 305 23Rd Ave'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
2th percentile

Out of 2250 buildings in this neighborhood, 2205 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
30%
No DBI
violation
70%
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.

Estimated permit spend (past 7 years)

Dollar value of permits pulled at this address — large recent spend can signal deferred-maintenance catch-up.

12-Month severity forecast
No violation 30.7%
Moderate concern 47.0%
Severe concern 22.3%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

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The story over time

305 23Rd Ave event timeline

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

2026
311 Request Jun 14
Garbage and debris
electronics
Electrical PermitMar 06
Online electrical permit: 120 of buildings of 7-12 dwelling units. modification of an existing fire alarm system by upgrading the fire panel, update all existing devices to be compatible with new facp and provide low frequency sounders in all sleeping areas to meet 75db

See all 20 events

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

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Every record we have

Full data for 305 23Rd Ave 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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