Free SF apartment background check

4111 20Th St

Eureka Valley/Dolores Heights, SF 94114 3603091 2 units · 3 fl · 1900

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 Eureka Valley/Dolores Heights
At or below average
avg 1.3
0
FewerMore

This building has 0 novs (7y), at or below the Eureka Valley/Dolores Heights average of 1.3.

Rent & eviction protection

Is 4111 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 1900
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RH2
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
Floors3
Year built1900
Total area3,094 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3603091
Ownership

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

Owner name
Jedd M Monson Declaration T
Mailing address
Monson Jedd M Trustee 4111 20Th St San Francisco CA 94114
Last sale
082911

Landlord portfolio

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

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Augrented Insights
Initial analysis

The three-story multi-family residential building at 4111 20th Street, located in the Eureka Valley/Dolores Heights neighborhood, is a two-unit structure built in 1900 that has undergone several significant maintenance and improvement projects over the past three decades. The most recent major exterior work occurred in 2015, when substantial repairs were made to address dry rotted shingles, sills, and siding at a cost of $50,000. In 2006, the property underwent an important conversion of its storage area into a garage, including structural modifications and the installation of a new concrete ramp, with associated electrical work for new garage equipment in 2007. Historical records indicate earlier maintenance including termite repairs (1991), front entry stair repairs (1991), and various roofing and sidewalk work, though these earlier permits have expired.

The building's recent service history shows several 311 calls in 2024, primarily related to parking issues and minor maintenance concerns such as graffiti and street cleaning, though most of these cases were either resolved, deemed invalid, or not directly related to the property's condition. A smoke detector activation incident was recorded, but no fire or civilian injuries were reported. The property's maintenance record suggests regular upkeep, with significant investments in infrastructure such as the garage conversion and exterior repairs.

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

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Risk rating

How 4111 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
58th percentile

Out of 1278 buildings in this neighborhood, 537 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
79%
No DBI
violation
21%
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.

Neighborhood location

Precise location is a proxy for neighborhood-level risk — some SF blocks have systematically higher DBI activity.

Building age

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

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 72.6%
Moderate concern 14.5%
Severe concern 12.9%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

4111 20Th St apartment reviews

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The story over time

4111 20Th St event timeline

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

2025
311 Request Feb 24
Park services area
trash dumping

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 4111 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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