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1528-1530 20Th St

Potrero Hill, SF 94107 4067032 2 units · 1 fl

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 Potrero Hill
At or below average
avg 1.1
0
FewerMore

This building has 0 novs (7y), at or below the Potrero Hill average of 1.1.

Rent & eviction protection

Is 1528-1530 20Th St 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 unknown
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
NC2
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
Floors1
Year built—
Total area1,166 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot4067032
Ownership

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

Owner name
Stern Anna Trust
Mailing address
Anna Stern Trustee 1200 18Th St San Francisco CA 94107
Last sale
041502

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.

1530 20th St, San Francisco, CA 94107
1528 20th St, San Francisco, CA 94107
Augrented Insights
Initial analysis

The property at 1528-1530 20th Street in Potrero Hill is a one-story multi-family residential building (classed as Flats & Duplex) containing two units, currently owned by the Stern Anna Trust. The building's recent history shows a pattern of maintenance and environmental challenges, with multiple 311 calls in 2023 and 2024. The most pressing current issue is an open case from November 2024 regarding graffiti on the sidewalk in front of the property. Recent environmental concerns included multiple incidents of human waste or urine on the street/sidewalk (reported in June 2024 and June 2023), while aesthetic concerns involved graffiti on a pole (August 2024), a defaced parking sign (October 2023), and two instances of fallen trees requiring maintenance (October 2023 and August 2023).

The property has experienced some significant tenant-related events, including two documented tenant buyouts in September 2022: one at 475 Connecticut Street for $50,000 involving 2 tenants, and another at 1538 20th Street for $50,000 involving 1 tenant. These buyouts, while not occurring at the current address, may indicate market trends in the immediate neighborhood. The building's most recent complaint (as of December 2023) involves a DTIS Wifi support issue which remains open, though this is somewhat peripheral to the building's core residential function. While the majority of reported issues have been resolved through appropriate city services, the recurring nature of street cleaning requests and graffiti incidents suggests ongoing maintenance challenges in the immediate vicinity.

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

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Risk rating

How 1528-1530 20Th St'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
96th percentile

Out of 726 buildings in this neighborhood, 29 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
92%
No DBI
violation
8%
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 age

Older buildings tend to have more maintenance challenges; SF's pre-1906 earthquake housing stock carries distinct risk.

Building permits, owner's portfolio

Permits pulled across all of this owner's buildings 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 85.9%
Moderate concern 9.5%
Severe concern 4.6%
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

1528-1530 20Th St event timeline

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

2026
311 Request Apr 21
Other illegal parking
Parking Enforcement

See all 2 events

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

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Every record we have

Full data for 1528-1530 20Th St apartments

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

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