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119-121 20Th Ave

Lake Street, SF 94121 1380002 2 units · 3 fl · 1982

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 119-121 20Th 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 1982
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 built1982
Total area5,355 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1380002
Ownership

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

Owner name
Tong Luis & Wu Un Kei
Mailing address
119 20th Ave San Francisco CA 94121
Last sale
020217

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.

119 20th Ave, San Francisco, CA 94121
121 20th Ave, San Francisco, CA 94121
Augrented Insights
Initial analysis

The property at 119-121 20th Avenue is a three-story, two-unit multi-family residential building located in the Lake --The Presidio neighborhood, owned by Tong Luis & Wu Un Kei. Built in 1982, this flats & duplex structure has undergone several maintenance projects over the years, including a reroofing project in 1997 and the installation of vinyl siding on the rear wall in 1999, though both permits are now expired. A significant housing complaint was filed in September 2000 regarding a broken toilet affecting a disabled tenant, which was resolved by December 2000.

In recent years, the property has experienced multiple parking enforcement issues, with three documented cases of vehicles blocking driveways or parking on sidewalks in 2024 alone, though citations were not issued in all cases. There have been recurring issues with abandoned vehicles in the vicinity, with three separate incidents reported between 2018 and 2021, though these vehicles were gone by the time authorities arrived. The building's history includes two reports of tree-related issues in 2019 and 2020, one involving vandalism and the other concerning a hanging limb, both of which were addressed by Public Works. While these maintenance and enforcement issues have been documented through various channels, there have been no reported fire incidents with injuries at the property, though there was one alarm activation due to a system malfunction. The building's maintenance record shows regular upkeep typical for its age, though many historical permits have since expired.

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

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Risk rating

How 119-121 20Th 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
90th percentile

Out of 660 buildings in this neighborhood, 66 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
90%
No DBI
violation
10%
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.

Building size

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

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.

12-Month severity forecast
No violation 83.6%
Moderate concern 12.4%
Severe concern 4.0%
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

119-121 20Th Ave event timeline

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

2025
Building Permit Jul 01
Re-roof, hot works. complete removal of existing composition shingles and bitumen membrane and install new composition shingles and bitumen membrane.
$18,000 · Complete
Building PermitMar 27
Replace (e) window in the kitchen, window in the laundry and window in bedroom. not visible from street. same size and same location max 0.30 u-factor aluminum to vinyl.

See all 4 events

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

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Every record we have

Full data for 119-121 20Th Ave apartments

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

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