Free SF apartment background check

20 San Antonio Pl

Telegraph Hill, SF 94133 0132047 8 units · 3 fl · 1958

This building has significantly more problems than most nearby buildings. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood
Compared to a typical building in Telegraph Hill
At or below average
avg 1.2
1
FewerMore

This building has 1 novs (7y), at or below the Telegraph Hill average of 1.2.

Rent & eviction protection

Is 20 San Antonio Pl 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 1958
2 or more units
8 units
Property type
Multi-Family Residential
Zoning
RM1
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
Units8
Floors3
Year built1958
Total area5,232 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0132047
Ownership

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

Owner name
20 San Antonio I6 Lp
Mailing address
Steven C. Thrower 1 Bush St Ste 900 San Francisco CA 94104
Last sale
041818

Landlord portfolio

Other SF properties this owner holds, with risk grades for each.

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Augrented Insights
Initial analysis

20 San Antonio Place is a three-story multi-family residential building located in Telegraph Hill, consisting of 8 units and constructed in 1958. The building has recently experienced several significant structural and maintenance issues, with the most pressing being an active violation filed in January 2024 regarding cracks and spalling at the building's base with possible water intrusion, and a flooding incident in June 2024 attributed to pipe blockages. These structural concerns follow a pattern of water-related issues, including a documented history of leaks from top to bottom floors, particularly during heavy rains, as noted in a October 2023 complaint. To address safety concerns, the building is currently undergoing fire alarm system upgrades, including the installation of new low-frequency sounders in sleeping areas, to comply with San Francisco Fire Code requirements.

The building has undergone several unit renovations over the years, including comprehensive updates to Units 1A (2021), 2B (2018), and gas line replacements for units 1A, 2A, and 3A in 2019. Historical records show previous concerns with the building's infrastructure, including a sewer leak investigation in 2005, a damaged fence issue in 2018, and multiple dry rot repair attempts in 1996. The property has also seen routine maintenance such as reroofing in 2010 and water heater replacement in 2016. A tenant buyout occurred in November 2021 for $8,500, and there have been several 311 calls regarding the property, primarily related to parking violations, though none directly related to building maintenance or safety issues.

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

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Risk rating

How 20 San Antonio Pl'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
13th percentile

Out of 684 buildings in this neighborhood, 595 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
46%
No DBI
violation
54%
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.

Number of units

The number of units affects how the model reads complaint and violation totals — more units means more potential sources.

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 41.6%
Moderate concern 35.8%
Severe concern 22.6%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
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The story over time

20 San Antonio Pl event timeline

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

2026
Building Permit Jan 02
Do all necessary repairs per report dated 8-4-25 from borne consulting civil engineer for sb-721 for decks, repairs and sealing. less than 50% repair
$33,000 · Complete
311 RequestJan 02
Amplified sound electronics

See all 20 events

Full history back to 2019 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 20 San Antonio Pl 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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