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3409-3421 23Rd St

Inner Mission, SF 94110 3644020 21 units · 2 fl · 1923

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
17
FewerMore

This building has 17 novs (7y), above the Inner Mission average of 2.6.

Rent & eviction protection

Is 3409-3421 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 1923
2 or more units
21 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
Units21
Floors2
Year built1923
Total area19,632 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3644020
Ownership

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

Owner name
Samantha Lp
Mailing address
1717 Powell St Ste 300 San Francisco CA 94133
Last sale
120115

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.

1210 Valencia St, San Francisco, CA 94110
1208 Valencia St, San Francisco, CA 94110
1204 Valencia St, San Francisco, CA 94110
1200 Valencia St, San Francisco, CA 94110
3409 23rd St, San Francisco, CA 94110
3421 23rd St, San Francisco, CA 94110
1202 Valencia St, San Francisco, CA 94110
1206 Valencia St, San Francisco, CA 94110
Augrented Insights
Initial analysis

The property at 3409-3421 23rd Street in San Francisco's Inner Mission is a 21-unit, 2-story multi-family residential building constructed in 1923, currently owned by Samantha Lp. The building has undergone numerous renovations and maintenance activities over the past decade, with the most recent work including kitchen and bathroom remodels in Unit #2 and Unit #4 (completed in 2024 and 2023 respectively), and staircase repairs in response to a July 2023 complaint. A significant fire alarm system upgrade was completed in 2020 for $35,600, and there have been various unit renovations focusing on modernizing kitchens, bathrooms, and electrical systems across multiple units between 2013 and 2024.

The building has experienced recurring fire safety concerns, with several violations and complaints regarding alarm systems, sprinkler systems, and other safety features between 2019 and 2024. Most recently, violations were issued in October 2024 and November 2023 regarding alarm system maintenance and sleeping area requirements, though these were subsequently abated. In July 2023, multiple building violations were documented including water damage issues and concerns about lead-based paint, which were addressed through subsequent repairs. The building has also had periodic maintenance issues documented through 311 calls and complaints, including flooding incidents in late 2024, though many of these were determined to require no further action.

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

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Risk rating

How 3409-3421 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
3th percentile

Out of 2380 buildings in this neighborhood, 2309 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
15%
No DBI
violation
85%
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.

Building size

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

12-Month severity forecast
No violation 11.3%
Moderate concern 48.7%
Severe concern 40.0%
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

3409-3421 23Rd St event timeline

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

2026
Plumbing Permit Jun 09
Work category: 8p; remove boiler serial numbers c12240000, 34498a & hsba40291. new replacement laars mt2v-200 water heater installed by others.
Complete
311 RequestJun 05
Garbage and debris

See all 34 events

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

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Every record we have

Full data for 3409-3421 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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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

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