Free SF apartment background check

420 12Th Ave

Inner Richmond, SF 94118 1533035 2 units · 2 fl · 1979

This building has a substantial enforcement record over the last seven years, but recent activity points to a low risk of further maintenance problems in the next 12 months. Read the records below before you sign. Ask which issues were resolved, get repair commitments in writing, and inspect the unit yourself.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Inner Richmond — not a forecast
Above average
avg 0.9
4
FewerMore

This building has 4 novs (7y), above the Inner Richmond average of 0.9.

Rent & eviction protection

Is 420 12Th 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 1979
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RH2
Not rent-controlled. Buildings constructed after 1978 are generally exempt from SF rent increase limits under the Costa-Hawkins Act.

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 1979
Annual rent increase cap
5% + CPI, max 10%
Just-cause eviction
After 12 months
May be covered by AB 1482. The building is old enough for the statewide rent cap (5% + regional CPI, capped at 10% per year) and just-cause protection after 12 months of tenancy.

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
Units2
Floors2
Year built1979
Total area4,050 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1533035
Ownership

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

Owner name
Mailing address
564 4th Ave San Francisco CA 94118
Last sale
—

Landlord portfolio

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

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Augrented Insights
Initial analysis

The two-unit residential building at 420 12th Avenue in the Inner Richmond was constructed in 1979 and is owned by Nunnery Lo San. The building's most significant recent history involves a series of violations documented in June 2019, relating to multiple safety and maintenance concerns, including damaged walls above window frames in rear bedrooms, inadequate bathroom ventilation, absence of required fire extinguishers, and an oven in disrepair. These violations were collectively addressed and officially abated by August 2022. Prior to these issues, the building had experienced fire damage that required repair work in 1993, though this permit is currently listed as expired.

The property's maintenance history shows a consistent pattern of addressing resident concerns, particularly during the 2019-2022 period when multiple improvements were made to resolve the documented violations. Outside the building itself, there have been various neighborhood incidents recorded through 311 calls, including parking violations on the sidewalk (2018-2020), illegal postings (2021), and street cleaning issues (2018). While these external matters don't directly affect the building's habitability, they provide context about the property's surroundings. The building's documented history reflects a major period of remediation work completed by 2022, addressing a range of safety and maintenance concerns that had accumulated over time.

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

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Risk rating

How 420 12Th 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

Lower risk — safer than most nearby

DBI rarely finds violations here. Strong maintenance history and a clean complaint record.

Typical — about average for the neighborhood

Some past violations or complaints on record. Worth asking the landlord about any open issues before signing.

Higher risk — riskier than most nearby

Elevated violation and complaint history. DBI has found issues here before and is statistically likely to again.

Neighborhood percentile
36thpercentile

Out of 1723 buildings in this neighborhood, 1103 are predicted to be safer. The band is relative to this neighborhood, so a share of every neighborhood falls in each colour.

RiskiestSafest
Predicted 12-month outcome
79%
No DBI
violation
21%
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.

NOV rate, owner's portfolio

Per-building NOV rate across everything this owner manages — high rates signal pattern neglect.

DBI tenant complaints (past 7 years)

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

Permit rate, owner's portfolio

Per-building permit rate across the owner's portfolio.

12-Month risk forecast
Low failure risk 21%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

420 12Th Ave apartment reviews

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On the map

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Buildings nearby
8 found
The story over time

420 12Th Ave event timeline

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

2019
Building Violation (NOV) Jun 27
Building violation
Ensure oven is in good working order. at time of inspection oven did not appear to be operating correctly.
Building Violation (NOV)Jun 27
Building violation

See all 6 events

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

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Every record we have

Full data for 420 12Th Ave apartments

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

Side by side

How 420 12Th Ave compares to the neighborhood

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