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3680-3684 20Th St

Mission Dolores, SF 94110 3597027 4 units · 2 fl · 1911

A handful of records on file over the last seven years, and our model sees a moderate chance of more in the next 12 months. A few records worth reading before you sign. Check whether they were closed out, and ask what was actually fixed.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Mission Dolores — not a forecast
At or below average
avg 2.9
0
FewerMore

This building has 0 novs (7y), at or below the Mission Dolores average of 2.9.

Rent & eviction protection

Is 3680-3684 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
4 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.

Statewide backstop · AB 1482

California Tenant Protection Act of 2019

Even when a building isn't covered by local rent stabilization, the statewide Tenant Protection Act (AB 1482) may still apply. It caps annual rent increases and requires the landlord to state a legal reason to end most tenancies.

15+ years since occupancy
Built 1911
Annual rent increase cap
5% + CPI, max 10%
Just-cause eviction
After 12 months
Local rent control likely takes priority. This building appears to fall under the local ordinance above, which is stronger than AB 1482. Where a local just-cause ordinance applies, its rules govern instead of the state cap.

AB 1482 does not apply to single-family homes and condos unless owned by a corporation, REIT, or an LLC with a corporate member; to owner-occupied duplexes; or to deed-restricted affordable housing. The Act is in effect until January 1, 2030. Not legal advice — see the California landlord–tenant guide.

Building characteristics
Units4
Floors2
Year built1911
Total area2,844 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3597027
Ownership

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

Mailing address
Edwin Wing & Priscilla Ping 851 28Th Ave San Francisco CA 94121
Last sale

Landlord portfolio

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

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Multiple entrances & addresses

Included addresses

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

3684 20th St, San Francisco, CA 94110
3680 20th St, San Francisco, CA 94110
3682 20th St, San Francisco, CA 94110
Augrented Insights
Initial analysis

The property at 3680-3684 20th Street is a 2-story mixed-use building constructed in 1911, containing 4 residential units and ground-floor commercial space in the Mission Dolores neighborhood. The building has undergone several significant maintenance and improvement projects over the years, with the most recent being a complete reroofing project in August 2024 costing $10,000, which included replacing scupper roof drains and downspouts. A notable recent complaint from March 2024 reported damaged walls and a malfunctioning stove, though this complaint is no longer active. The building has a history of structural and safety-related concerns, particularly evident in 2010 when multiple violations were documented regarding structural issues, an exterior wood utility ladder, and work compliance, all of which were addressed by September 2010 through various permits. Prior issues from 2003-2004 included problems with heating systems, stairs not meeting code, and lead paint concerns, all of which were resolved.

The property has maintained regular upkeep, with various improvements including bathroom and kitchen renovations in 2013 ($7,000), compliance-related repairs in 2002, and ongoing maintenance of common areas. Recent 311 calls from 2023-2024 primarily relate to street cleaning and graffiti issues, with eight cases of garbage and debris removal between June and August 2024. A significant development project is in progress to convert approximately 584 square feet of vacant ground-floor space into an ADU, which has received approval as part of the State Program. The building's maintenance history shows regular attention to both building-wide systems and individual unit concerns, with most violations being promptly addressed through proper channels and permits.

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

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Risk rating

How 3680-3684 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

Lower risk — safer than most nearby

DBI rarely finds violations here. Strong maintenance history and a clean complaint record.

Typical — about average for the neighborhood

Some past violations or complaints on record. Worth asking the landlord about any open issues before signing.

Higher risk — riskier than most nearby

Elevated violation and complaint history. DBI has found issues here before and is statistically likely to again.

Neighborhood percentile
34thpercentile

Out of 799 buildings in this neighborhood, 527 are predicted to be safer. The band is relative to this neighborhood, so a share of every neighborhood falls in each colour.

RiskiestSafest
Predicted 12-month outcome
58%
No DBI
violation
42%
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.

DBI tenant complaints (past 7 years)

Formal complaints tenants filed with DBI about this building over 7 years.

Number of units

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

Property class: apartment building

Apartment building — this property classification influences expected violation rates.

12-Month risk forecast
Moderate failure risk 42%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

3680-3684 20Th St apartment reviews

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On the map

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The story over time

3680-3684 20Th St event timeline

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

2026
Plumbing Permit Jul 29
Unit a 1/f: add a new bathroom. new kitchen. water heater. washer and dryer. (1) shower pan. underground work.
Issued
Electrical PermitJul 29
Unit a 1/f: add one new bathroom. new kitchen. new laundry room. electrical baseboard heater.

See all 10 events

Full history back to 2024 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 3680-3684 20Th St apartments

13 SF public datasets for this parcel — permits, violations, complaints, fire records, 311 calls, planning records, and buyouts.

Side by side

How 3680-3684 20Th St compares to the neighborhood

This building against comparable properties in Mission Dolores. Toggle filters to narrow the peer group.

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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

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