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3421-3425 23Rd St

Inner Mission, SF 94110 3644019 14 units · 3 fl · 1925

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 Inner Mission
Above average
avg 2.6
21
FewerMore

This building has 21 novs (7y), above the Inner Mission average of 2.6.

Rent & eviction protection

Is 3421-3425 23Rd 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 1925
2 or more units
14 units
Property type
Multi-Family Residential
Zoning
VALEN
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
Units14
Floors3
Year built1925
Total area—
Property typeMulti-Family Residential
Tax statusNone
Blocklot3644019
Ownership

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

Owner name
Paul Teang Gee Survivors Tr
Mailing address
10 Alton Ave San Francisco CA 94116
Last sale
000000

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.

3425 23rd St, San Francisco, CA 94110
3421 23rd St, San Francisco, CA 94110
3423 23rd St, San Francisco, CA 94110
Augrented Insights
Initial analysis

The three-story, 14-unit multi-family residential building at 3421-3425 23rd Street in San Francisco's Inner Mission, built in 1925, has undergone several significant improvements and faced multiple maintenance challenges over the years. Most notably, the building completed mandatory soft-story seismic retrofitting in 2018, with work classified as Tier 4 and including both commercial and residential components, demonstrating compliance with city safety requirements. Recent building violations from May 2023 indicate several pressing maintenance issues that require attention, including concerns about lead-based paint, damaged ceilings, building security systems, fire safety equipment, and window maintenance, all of which are currently classified as active violations.

The property has a documented history of fire safety concerns, with violations issued in September 2023 regarding alarm systems and fire extinguishers, though these violations were subsequently abated. A dental office conversion was completed in 2017, indicating adaptive reuse of space within the building. Recent 311 calls from late 2024 show ongoing issues with graffiti removal and discarded debris near the property, though these external maintenance matters were promptly addressed by city services. The building's systems have received attention over the years, including boiler installation in 2012 and various roofing work in 2001. Multiple street space permits were issued between 2014-2019, suggesting regular coordination with city services, though these permits had minimal reported costs. The property's dual classification as both residential and commercial space is notable, with the ground floor housing medical services following a 2017 use change.

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

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Risk rating

How 3421-3425 23Rd 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
6th percentile

Out of 2380 buildings in this neighborhood, 2237 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
20%
No DBI
violation
80%
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.

Notices of Violation (past 7 years)

DBI issued Notices of Violation at this address over the last 7 years — a direct record of code enforcement activity.

DBI tenant complaints (past 7 years)

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

12-Month severity forecast
No violation 16.0%
Moderate concern 43.1%
Severe concern 41.0%
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

3421-3425 23Rd St event timeline

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

2026
311 Request Jun 02
Garbage and debris
furniture
Fire ComplaintMay 29
Sprinkler/Standpipe 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 3421-3425 23Rd St apartments

13 SF public datasets for this parcel — permits, violations, complaints, fire records, 311 calls, planning records, and buyouts.

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