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1904-1906 20Th St

Potrero Hill, SF 94107 4071013 2 units · 3 fl · 1988

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 1904-1906 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 1988
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RM1
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 built1988
Total area4,175 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot4071013
Ownership

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

Owner name
Nicolas Cserepy 2019 Tr
Mailing address
Cserepy Nicolas Trustee 1906 20Th St San Francisco CA 94107
Last sale
122018

Landlord portfolio

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

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Included addresses

All street addresses sharing this blocklot that are covered by this report.

1906 20th St, San Francisco, CA 94107
1904 20th St, San Francisco, CA 94107
Augrented Insights
Initial analysis

The property at 1904-1906 20th Street in Potrero Hill is a three-story, two-unit multi-family residential building constructed in 1988, currently owned by the Nicolas Cserepy 2019 Trust. The building has undergone several significant renovations and improvements over the past decade, with the most recent major work occurring in 2018, including a kitchen and two bathroom remodels valued at $50,000. Earlier improvements included the construction of a media room, laundry facilities, and half bath in the basement in 2016, followed by bathroom and kitchen renovations in 2018. A comprehensive fire safety upgrade was completed in 2012 with the installation of a new fire sprinkler system throughout the building, costing $41,400, though the associated plumbing permit has since expired.

The building's history shows attention to safety and modern amenities, with multiple revisions and updates to comply with building codes, including guardrail modifications, balcony surface changes, and various bathroom and kitchen improvements. There have been two documented fire incidents, both of which resulted in no civilian injuries: one false alarm and one electrical wiring/equipment issue. More recently, from late 2024, there have been several infrastructure and maintenance issues reported in the vicinity, including flooding, graffiti, garbage concerns, and tree maintenance needs, though these primarily affect the street and sidewalk areas rather than the building itself. The property has undergone several permit revisions over the years, with most recent work focusing on interior modernization and compliance with current building standards, including the removal of unauthorized modifications noted in a 2011 complaint regarding unauthorized gutting work. The building's maintenance record shows regular updates to keep systems current, particularly in terms of water, electrical, and fire safety systems, with all recent permit work having been properly completed and signed off by city authorities.

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

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Risk rating

How 1904-1906 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
51th percentile

Out of 726 buildings in this neighborhood, 356 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
75%
No DBI
violation
25%
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.

Neighborhood (ZIP code)

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

Property class: multi-family flat

2–4 unit flats (class F) are a common SF building type with their own maintenance and complaint patterns.

12-Month severity forecast
No violation 66.6%
Moderate concern 19.3%
Severe concern 14.1%
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

1904-1906 20Th St event timeline

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

2025
311 Request May 20
Garbage and debris
furniture

See all 5 events

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

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Every record we have

Full data for 1904-1906 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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