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126-128 21St Ave

Lake Street, SF 94121 1380031 2 units · 2 fl · 1972

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 Lake Street
At or below average
avg 0.6
0
FewerMore

This building has 0 novs (7y), at or below the Lake Street average of 0.6.

Rent & eviction protection

Is 126-128 21St 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 1972
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 built1972
Total area4,400 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot1380031
Ownership

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

Owner name
Owyang Bypass Trust The
Mailing address
Florence Owyang 128 21St Ave San Francisco CA 94121
Last sale
032095

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.

126 21st Ave, San Francisco, CA 94121
128 21st Ave, San Francisco, CA 94121
Augrented Insights
Initial analysis

The two-story multi-family residential building at 126-128 21st Avenue, owned by the Owyang Bypass Trust, was constructed in 1972 and contains two units. The building has undergone several significant maintenance and repair projects over its lifetime, with the most recent notable work being a roof foam overlay application completed in 2017 at a cost of $21,533. Prior roofing work was performed in 2005 and 1989, while other improvements included a window replacement project in 2002 involving twelve street-visible windows. The property has experienced recurrent issues with abandoned vehicles in the vicinity, with eight documented incidents between 2014 and 2021, though all were resolved with vehicles being gone upon inspection. Other minor incidents include a defaced parking sign in 2021 and an encampment report in 2019 that was investigated and found to be resolved. The building's maintenance history shows regular upkeep of essential systems, particularly focusing on roof maintenance and window improvements.

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

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Risk rating

How 126-128 21St 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
92th percentile

Out of 660 buildings in this neighborhood, 53 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
91%
No DBI
violation
9%
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.

Construction spend, owner's portfolio

Estimated permit value across all of this owner's buildings.

Estimated permit spend (past 7 years)

Dollar value of permits pulled at this address — large recent spend can signal deferred-maintenance catch-up.

Building permits, owner's portfolio

Permits pulled across all of this owner's buildings over 7 years.

12-Month severity forecast
No violation 83.1%
Moderate concern 12.1%
Severe concern 4.9%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

126-128 21St Ave apartment reviews

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The story over time

126-128 21St 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 126-128 21St 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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