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662-664 23Rd Ave

Central Richmond, SF 94121 1622026 2 units · 3 fl · 1981

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 Central Richmond
At or below average
avg 0.5
0
FewerMore

This building has 0 novs (7y), at or below the Central Richmond average of 0.5.

Rent & eviction protection

Is 662-664 23Rd 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 1981
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.

Building characteristics
Units2
Floors3
Year built1981
Total area5,292 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot1622026
Ownership

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

Owner name
Wong Revocable Trust
Mailing address
Koung & Mi Lee Wong, Truste 664 23Rd Ave San Francisco CA 94121
Last sale
000000

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.

664 23rd Ave, San Francisco, CA 94121
662 23rd Ave, San Francisco, CA 94121
Augrented Insights
Initial analysis

The property at 662-664 23rd Avenue is a three-story, two-unit multi-family residential building located in San Francisco's Central Richmond neighborhood. Built in 1981 and currently owned by Wong Revocable Trust, this flats and duplex structure has undergone several significant improvements over the years, with the most recent major work occurring in 2016 when the front of the building was restuccoed and underwent window and door replacements on the second and third floors. The building has seen consistent maintenance and upgrades to its exterior, including balcony repairs in 2016, roofing work in 2009, and siding installations in 2008, all of which were completed without structural changes. Historical records show earlier minor work from the 1980s including a basement stove removal.

More recently, the property has experienced some maintenance and parking issues, with several 311 calls documented between 2022 and 2024. Notably, there was a sewage backup incident reported in February 2024 that was subsequently resolved. The building has also been affected by parking-related challenges in the vicinity, with multiple reports of illegal parking and driveway blocking between 2023 and 2024. Street cleaning concerns were documented in late 2022 and recent 2024, including reports of debris and garbage. The property's maintenance record shows regular upkeep of its exterior structures, while the 311 call logs reveal ongoing challenges with street parking and occasional environmental maintenance needs in the surrounding public space.

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

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Risk rating

How 662-664 23Rd 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
66th percentile

Out of 2250 buildings in this neighborhood, 765 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
86%
No DBI
violation
14%
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.

Permit rate, owner's portfolio

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

Building size

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

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 84.1%
Moderate concern 8.8%
Severe concern 7.2%
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

662-664 23Rd Ave event timeline

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

No dated public records on file yet.
Every record we have

Full data for 662-664 23Rd 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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