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320-324 12Th St

South of Market, SF 94103 3522003 3 units · 3 fl · 1907

This building has more problems than most buildings in this neighborhood. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood
Compared to a typical building in South of Market
At or below average
avg 3.3
0
FewerMore

This building has 0 novs (7y), at or below the South of Market average of 3.3.

Rent & eviction protection

Is 320-324 12Th 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 1907
2 or more units
3 units
Property type
Multi-Family Residential
Zoning
SLR
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
Units3
Floors3
Year built1907
Total area4,638 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3522003
Ownership

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

Owner name
Castellanos Jose & Elena G
Mailing address
320 12th St San Francisco CA 94103
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.

322 12th St, San Francisco, CA 94103
320 12th St, San Francisco, CA 94103
324 12th St, San Francisco, CA 94103
Augrented Insights
Initial analysis

The three-unit residential building at 320-324 12th Street, located in San Francisco's South of Market neighborhood, is a three-story structure built in 1907, currently owned by Jose and Elena G Castellanos. The property has a documented history of stair-related issues, with multiple repairs required for the rear exterior stairs due to dry rot in 2018, following similar concerns in 2007 that necessitated more extensive repairs costing $5,000. Notably, the building faced significant violations in early 2018, including multiple health and safety issues such as the need for fire extinguisher maintenance, smoke alarm certification, and structural maintenance compliance, along with problems related to combustible storage and peeling paint that presented potential lead hazards; these violations were all abated by April 10, 2018.

The building's more recent history includes a 2020 complaint about unpermitted construction activity and several 311 calls in 2024 related to various issues including illegal parking, garbage and debris, graffiti, and waste removal. The property has undergone some improvements over the years, including a kitchen remodel in 1986 and an unsuccessful attempt to replace windows and install deadbolts in 1985. Recent 311 calls from 2024 indicate ongoing maintenance challenges in the surrounding area, though these are primarily external to the building itself. The building's documented history shows a pattern of addressing structural and safety issues as they arise, with most recent violations being resolved through proper channels, though the frequency of stair-related repairs suggests ongoing challenges with this particular building component.

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

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Risk rating

How 320-324 12Th 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
27th percentile

Out of 430 buildings in this neighborhood, 314 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
45%
No DBI
violation
55%
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.

Neighborhood (ZIP code)

The ZIP code captures local housing market and enforcement patterns that affect all buildings in the area.

DBI complaints, owner's portfolio

Complaints across all of this owner's buildings over 7 years.

DBI tenant complaints (past 7 years)

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

12-Month severity forecast
No violation 22.0%
Moderate concern 14.3%
Severe concern 63.7%
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

320-324 12Th St event timeline

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

2025
311 Request Jan 18
Parking on sidewalk
Parking Enforcement

See all 6 events

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

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Every record we have

Full data for 320-324 12Th St apartments

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

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