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3701-3703 20Th St

Eureka Valley/Dolores Heights, SF 94110 3607001 5 units · 2 fl · 1900

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 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 3701-3703 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
5 units
Property type
Multi-Family Residential
Zoning
RH3
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
Units5
Floors2
Year built1900
Total area3,242 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot3607001
Ownership

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

Owner name
Chan & Huang Fmly Tr 9/18/0
Mailing address
James Chan & Mei Xian Huang 800 Guerrero St San Francisco CA 94110
Last sale
000000

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.

3703 20th St, San Francisco, CA 94110
3701 20th St, San Francisco, CA 94110
800 Guerrero St, San Francisco, CA 94110
Augrented Insights
Initial analysis

The property at 3701-3703 20th Street is a two-story multi-family residential building located in the Eureka Valley/Dolores Heights neighborhood. Built in 1900, this 5-unit apartment building has undergone several significant modifications and faced various challenges over its history. The most pressing recent concern has been related to the vacant commercial storefront portion of the property, with multiple complaints and registration issues between 2018-2022 regarding failure to comply with the vacant storefront ordinance, though these violations were eventually abated. The building has undergone some major maintenance work, including a completed horizontal addition in 1998, reroofing in 2006 (costing $11,880), and a street space permit issued in 2011. Routine housing inspections in 2002 and 2006 were completed without noted violations.

The most recent maintenance issues have primarily involved building exterior and grounds matters, as evidenced by multiple 311 calls from late 2024 regarding public works, illegal postings, and tree maintenance concerns. Notable incidents recorded by the fire department include three responses: a malicious false alarm, a vehicle accident cleanup, and a water-related issue, none of which resulted in civilian injuries. The property has maintained compliance with housing codes since its last recorded violations, with all issues being resolved through proper channels, including a recently opened illegal posting case and a damaged property report in December 2024 that remains under investigation. Historical planning records indicate various administrative requests and conversions have been processed, though no significant current development activity is noted.

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

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Risk rating

How 3701-3703 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
12th percentile

Out of 1278 buildings in this neighborhood, 1125 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
45%
No DBI
violation
55%
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 34.1%
Moderate concern 37.5%
Severe concern 28.4%
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

3701-3703 20Th St event timeline

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

2026
DBI Complaint Jun 15
Vacant building
Code Enforcement Section
311 RequestMay 28
Garbage and debris

See all 9 events

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

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Every record we have

Full data for 3701-3703 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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