Free SF apartment background check

3340 San Bruno Ave

Visitacion Valley, SF 94134 6172037 6 units · 1 fl · 1914

This building has significantly more problems than most nearby buildings. Few open issues; problems get fixed quickly. A reasonable bet for a smooth tenancy.

NOVs (7y) vs. neighborhood
Compared to a typical building in Visitacion Valley
Above average
avg 1.4
9
FewerMore

This building has 9 novs (7y), above the Visitacion Valley average of 1.4.

Rent & eviction protection

Is 3340 San Bruno 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 1914
2 or more units
6 units
Property type
Multi-Family Residential
Zoning
RM1
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
Units6
Floors1
Year built1914
Total area3,411 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot6172037
Ownership

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

Owner name
Liang Zhichao
Mailing address
3340 San Bruno Ave Apt 5 San Francisco CA 94134
Last sale
092816

Landlord portfolio

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

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Augrented Insights
Initial analysis

The property at 3340 San Bruno Avenue is a six-unit, multi-family residential building constructed in 1914, currently owned by Liang Zhichao. The building has experienced several significant maintenance and compliance issues in recent years, with the most concerning being an active complaint from May 2023 regarding a leaking ceiling that resulted in ceiling collapse onto a bed. Other notable recent issues include a broken house trap in 2021, water damage repairs in 2014, and multiple building code violations in 2018 relating to security, plumbing, and weatherproofing concerns. The property has undergone several major improvements, including a comprehensive plumbing upgrade in 2014 that replaced all iron pipes with copper, electrical work, and a kitchen/bathroom remodel in Unit 5. There have been multiple instances of unauthorized construction, most notably a disputed elevated deck/structure in 2017 that generated several complaints. The building's emergency systems were notably upgraded between 2001 and 2018, with violations relating to fire escape ladders, gas meter instructions, smoke detectors, and security locks being addressed.

Recent infrastructure concerns in the surrounding area include multiple sewer-related incidents and water main issues reported in 2024. The property has been the subject of various planning proposals, including past attempts to demolish the existing structure and construct a new building with additional units, though these have generally been disapproved or put on hold. The building's maintenance history shows a pattern of responding to both resident complaints and regulatory enforcement actions, with various permits filed to address building violations, repair work, and improvements. While many historical violations have been resolved, the continuing pattern of maintenance issues, particularly in the past decade, suggests ongoing challenges with building upkeep and infrastructure stability.

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

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Risk rating

How 3340 San Bruno 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
12th percentile

Out of 214 buildings in this neighborhood, 188 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
67%
No DBI
violation
33%
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.

NOV rate, owner's portfolio

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

Neighborhood location

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

12-Month severity forecast
No violation 42.7%
Moderate concern 21.6%
Severe concern 35.7%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
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The story over time

3340 San Bruno Ave event timeline

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

2023
Building Violation (NOV) May 25 Serious
Building violation
Violations cited herein constitute a nuisance pursuant to sections 401 and 1001(d) of the san francisco housing code. it is the property ow…
Building Violation (NOV)May 25
Building violation

See all 11 events

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

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Every record we have

Full data for 3340 San Bruno 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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