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1333-1335 42Nd Ave

Outer Sunset, SF 94122 1797006 2 units · 2 fl · 1947

This building has a higher-than-average number of open problems nearby. Few open issues; problems get fixed quickly. A reasonable bet for a smooth tenancy.

NOVs (7y) vs. neighborhood
Compared to a typical building in Outer Sunset
At or below average
avg 1.8
0
FewerMore

This building has 0 novs (7y), at or below the Outer Sunset average of 1.8.

Rent & eviction protection

Is 1333-1335 42Nd 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 1947
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RH2
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
Units2
Floors2
Year built1947
Total area2,925 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1797006
Ownership

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

Owner name
Niu Rong A
Mailing address
P.o. Box 3734 Incline Village NV 89450
Last sale
102417

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.

1335 42nd Ave, San Francisco, CA 94122
1333 42nd Ave, San Francisco, CA 94122
1333 A 42nd Ave, San Francisco, CA 94122
Augrented Insights
Initial analysis

The property at 1333-1335 42nd Avenue in the Outer Sunset is a two-unit, two-story multi-family residential building constructed in 1947, currently owned by Niu Rong A. The building has undergone several significant renovations and safety upgrades over the past 15 years, most notably the recent installation of a fire sprinkler monitoring system in 2021, following the complete installation of a fire sprinkler system in 2016. Between 2015-2016, substantial improvements were made to the building, including the conversion of a playroom to a bedroom to legalize an in-law unit, along with comprehensive kitchen renovations and the installation of new utilities including water heater and furnace systems. The ground floor was previously expanded in 2007 to add a study room, playroom, and bathroom facilities.

The property has experienced recurring construction-related noise issues, with multiple complaints filed between 2022-2023, suggesting ongoing work in the vicinity or related to nearby developments. These noise complaints were generally resolved through communication with contractors and city agencies. The building's infrastructure improvements have included comprehensive updates to electrical systems, with new fire safety equipment installed in 2021, and significant plumbing work completed in 2016. Historical records show earlier maintenance work, including reroofing completed in 1989, showing the property has received regular upkeep over the years. While the recent construction noise issues have generated concerns, they appear to be related to external developments rather than the building itself, and all reported issues have been formally resolved through appropriate channels.

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

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Risk rating

How 1333-1335 42Nd 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
85th percentile

Out of 632 buildings in this neighborhood, 95 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
88%
No DBI
violation
12%
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 location

Precise location is a proxy for neighborhood-level risk — some SF blocks have systematically higher DBI activity.

Neighborhood location

Precise location is a proxy for neighborhood-level risk — some SF blocks have systematically higher DBI activity.

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 83.5%
Moderate concern 12.2%
Severe concern 4.3%
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

1333-1335 42Nd Ave event timeline

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

2025
Building Permit Mar 18
Replace e footing and slab with new concrete footing and slab
$120,000 · Filed

See all 3 events

Full history back to 2021 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 1333-1335 42Nd 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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