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602 4Th Ave

Inner Richmond, SF 94118 1641049 5 units · 2 fl · 1906

This building has far more open problems than almost any other in the neighborhood. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood
Compared to a typical building in Inner Richmond
At or below average
avg 0.9
0
FewerMore

This building has 0 novs (7y), at or below the Inner Richmond average of 0.9.

Rent & eviction protection

Is 602 4Th 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 1906
2 or more units
5 units
Property type
Multi-Family Residential
Zoning
NC2
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
Units5
Floors2
Year built1906
Total area6,174 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1641049
Ownership

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

Owner name
Leong Chi Ping&Yvonne W Rev
Mailing address
Chi Ping & Yvonne Leong 4425 Anza St San Francisco CA 94121
Last sale
072021

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.

245 Balboa St, San Francisco, CA 94118
602 04th Ave, San Francisco, CA 94118
251 Balboa St, San Francisco, CA 94118
Augrented Insights
Initial analysis

The two-story, five-unit multi-family residential building at 602 4th Avenue in San Francisco's Inner Richmond neighborhood was built in 1906 and has undergone several significant modifications over the years, with the most recent changes focused on construction-related activities that have caused disturbances for residents. The property, owned by Leong Chi Ping&yvonne W Rev, underwent substantial renovations in 2000-2003, including the conversion of the second floor into three dwelling units, installation of new bathrooms, replacement of damaged windows, and various electrical upgrades. More recent developments include the installation of an automatic fire suppression system in 2009 and plumbing work in 2024 involving the replacement of sewer house traps and main sewer lines.

Of particular concern are recurring construction-related complaints from 2023, where residents reported early morning construction work starting as early as 5:00 AM, which violated noise ordinances and negatively impacted the residential units above. These complaints resulted in multiple building inspection cases, with at least one remaining active as of June 2023. The building has also experienced some infrastructure challenges, including sewage backup incidents in late 2023 and early 2024, though these were addressed by the Public Utilities Commission. Additional maintenance issues have been documented through 311 calls, primarily related to street cleaning and garbage concerns, though these appear to be routine neighborhood maintenance issues rather than building-specific problems. The ground floor of the building has been permitted for commercial use as a restaurant, with the most recent continuation of this use approved under NC-2 zoning regulations.

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

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Risk rating

How 602 4Th 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
7th percentile

Out of 1723 buildings in this neighborhood, 1602 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.

DBI tenant complaints (past 7 years)

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

Number of units

The number of units affects how the model reads complaint and violation totals — more units means more potential sources.

Building size

Total floor area — a proxy for building scale and the number of systems (plumbing, electrical, HVAC) that can fail.

12-Month severity forecast
No violation 35.0%
Moderate concern 34.4%
Severe concern 30.5%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

602 4Th Ave apartment reviews

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The story over time

602 4Th Ave event timeline

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

2024
Plumbing Permit Aug 17
Work category: 1p; replace sewer house trap and 15' of main sewer line at sidewalk to building line.
Complete

See all 10 events

Full history back to 2023 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 602 4Th Ave apartments

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

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