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631-633 33Rd Ave

Outer Richmond, SF 94121 1576005 2 units · 2 fl · 1925

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 Outer Richmond
Above average
avg 0.7
7
FewerMore

This building has 7 novs (7y), above the Outer Richmond average of 0.7.

Rent & eviction protection

Is 631-633 33Rd 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 1925
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 built1925
Total area3,800 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1576005
Ownership

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

Owner name
Paul Tuen Wong Revoc Trust
Mailing address
Paul Wong 225 2Nd Ave San Francisco CA 94118
Last sale
121514

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.

631 33rd Ave, San Francisco, CA 94121
633 33rd Ave, San Francisco, CA 94121
Augrented Insights
Initial analysis

The property at 631-633 33rd Avenue is a two-unit, two-story multi-family residential building located in San Francisco's Outer Richmond neighborhood, built in 1925 and currently owned by the Paul Tuen Wong Revocable Trust. The building has experienced several significant maintenance issues in recent years, most notably concerning its plumbing systems. In 2023, there were multiple complaints about sewage leaks, including a troubling pattern of backups affecting the garage and a malfunctioning sewer backwater valve, which was subsequently addressed through proper installation of a backwater valve and an extended DWV system. There are also ongoing concerns about unauthorized modifications, with active complaints from 2022 regarding an unpermitted bathroom installation in a sunroom, though this has been partially addressed with recent permit applications for kitchen and bathroom remodeling on multiple floors, totaling approximately $143,910.

The building has a documented history of code violations from 2003, including issues with interior surfaces (water damage, mold, lead paint hazards), heating system deficiencies, and egress obstructions, though these were abated by July 2003. More recent violations from December 2022 included concerns about electrical outlets, lead paint, and stairs, all of which were addressed by February 2023. The property has also experienced recurring pest issues, with a 2023 complaint regarding pigeon infestation in common areas. Civilian fire safety incidents have been minimal, with no injuries reported, primarily consisting of false alarms and malfunctioning smoke detectors. The building's infrastructure has received some attention over the years, with completed permits for electrical system upgrades (including a 200-amp service upgrade) and various renovation work, though some permits have expired without completion. Recent parking enforcement records show regular enforcement activity in the area, suggesting ongoing concerns about parking compliance near the property.

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

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Risk rating

How 631-633 33Rd 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 1040 buildings in this neighborhood, 967 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
44%
No DBI
violation
56%
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.

NOV rate, owner's portfolio

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

DBI tenant complaints (past 7 years)

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

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 18.4%
Moderate concern 44.0%
Severe concern 37.6%
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

631-633 33Rd Ave event timeline

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

2025
Building Permit Oct 02
Revision to pa 202503313351 replace furnaces with a mini-split hvac system; relocate water heaters for both units; reconfigure interior stair in unit 633; update window & door styles on the 2nd and 3rd floor where not visible from the street; install 2 new skylights on the 3rd floor and update the
$10,000 · Issued
Plumbing PermitApr 22
Unit #631: 2.5 full bathroom remodeling, 1 kitchen remodeling unit #633: 3 full bathroom remodeling, 1 kitchen remodeling, install two tankless water heater replacements 2 ac units total 4 shower pan

See all 21 events

Full history back to 2022 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 631-633 33Rd Ave apartments

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

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