Free SF apartment background check

1930 20Th St

Potrero Hill, SF 94107 4071017 2 units · 2 fl · 1911

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 1930 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 1911
2 or more units
2 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
Units2
Floors2
Year built1911
Total area1,073 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot4071017
Ownership

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

Owner name
Dial James S
Mailing address
1930 20th St San Francisco CA 94107
Last sale
000000

Landlord portfolio

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

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Augrented Insights
Initial analysis

The property at 1930 20th Street is a two-unit, two-story multi-family residential building located in Potrero Hill, built in 1911 and currently owned by James S. Dial. The building has undergone several significant improvements over the past two decades, including multiple window and door replacements in 2010 (costing $4,900 total) and 2020 ($1,500), all executed in compliance with building regulations. A furnace replacement was completed in 2009, and in 2001, work was done on the rear stairs, deck, and posts for $5,000. However, the property has experienced several compliance issues, most notably in 2001 when unauthorized construction of a deck and stairs at the rear of the building led to a violation that was abated within two months. Additional violation history includes a 2005 incident involving an unpermitted 6-foot front fence, which resulted in abatement proceedings that were formally closed in 2009. A 2010 complaint regarding an improperly modified window was quickly resolved within days.

The building's maintenance record shows consistent attention to window and door upgrades, with all recent installations being double-pane units. The property has experienced several minor street-related issues in the surrounding area, including reports of hazardous materials, graffiti, and parking violations, though these are not directly related to the building's condition or management. Recent 311 calls primarily concern street maintenance matters such as abandoned vehicles, damaged trees, and sidewalk blocking issues, which have all been resolved through appropriate city channels. The most recent building-related permit activity was in 2020, focusing on window and door replacements that were properly permitted and installed.

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

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Risk rating

How 1930 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
75th percentile

Out of 726 buildings in this neighborhood, 182 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
83%
No DBI
violation
17%
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.

Estimated permit spend (past 7 years)

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

Neighborhood (ZIP code)

The ZIP code captures local housing market and enforcement patterns that affect all buildings in the area.

12-Month severity forecast
No violation 83.2%
Moderate concern 12.1%
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.
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The story over time

1930 20Th St event timeline

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

2020
Building Permit Feb 27
Replace (1) single pane patio door and (2) windows with double pane door & windows not visible from street.
$1,500 · Issued

See all 1 events

Full history back to 2020 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 1930 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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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

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