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1331-1333 40Th Ave

Outer Sunset, SF 94122 1795005 3 units · 1 fl · 1937

This building has more problems than most buildings in this neighborhood. 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
Above average
avg 1.8
5
FewerMore

This building has 5 novs (7y), above the Outer Sunset average of 1.8.

Rent & eviction protection

Is 1331-1333 40Th 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 1937
2 or more units
3 units
Property type
Multi-Family Residential
Zoning
RH1
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
Floors1
Year built1937
Total area2,425 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1795005
Ownership

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

Owner name
Chiu Family Trust 7/23/07
Mailing address
John Y & Agnes Chiu Trustee 3825 Quintara St San Francisco CA 94116
Last sale
061915

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.

1333 40th Ave, San Francisco, CA 94122
1331 40th Ave, San Francisco, CA 94122
Augrented Insights
Initial analysis

The 3-unit, 1-story multi-family residential building at 1331-1333 40th Avenue in the Outer Sunset, owned by the Chiu Family Trust since 2007, has undergone significant improvements in recent years, most notably the comprehensive sprinkler system installation completed in 2023, which included adding 41 new sprinkler heads throughout the building and installing a monitoring system. The property has seen considerable renovation work in 2021-2023, including window replacements, kitchen and bathroom remodels, and interior layout reconfigurations. Several building violations were addressed in 2022-2023, including lead paint hazards and a notable complaint about unauthorized construction work in early 2023, though most violations appear to have been resolved, with the exception of a front yard setback issue from 2015. Infrastructure upgrades have included a 200-amp electrical service update in late 2022 and new HVAC systems in 2023.

The building's maintenance history shows attention to various systems, including plumbing upgrades for three kitchens, bathrooms, and washer/dryer installations in early 2023. While there have been multiple complaints regarding building conditions over the years, including issues with paint, yard maintenance, and some exterior work concerns, most recent permits and improvements suggest a focus on modernization and safety upgrades. The property has experienced typical urban issues such as parking violations and occasional infrastructure concerns like manhole and sewer issues, as evidenced by recent 311 calls. The building's fire safety systems have been substantially improved with the recent sprinkler upgrades, and records show regular maintenance and upgrading of essential systems, though some historical permits from the 1980s and 1990s are now expired.

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

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Risk rating

How 1331-1333 40Th 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
29th percentile

Out of 632 buildings in this neighborhood, 449 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
61%
No DBI
violation
39%
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.

DBI tenant complaints (past 7 years)

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

DBI complaint rate, owner's portfolio

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

Number of floors

Building height affects maintenance complexity and is one of the size signals the model uses.

12-Month severity forecast
No violation 44.6%
Moderate concern 42.7%
Severe concern 12.8%
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

1331-1333 40Th Ave event timeline

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

2024
Building Permit Mar 13
Rev to pa# 2021-0331-7647; to eliminate pull test requirement on original permit, substitute underpining dad under holdowns that require pull test
$1 · Complete

See all 19 events

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

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Every record we have

Full data for 1331-1333 40Th 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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