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3364 21St St

Eureka Valley/Dolores Heights, SF 94110 3608021 3 units · 2 fl · 1900

Nothing on record for this building in the last seven years. Our model still sees a moderate chance of maintenance problems in the next 12 months, from the owner's wider portfolio and the surrounding area rather than from anything recorded here. No public enforcement record to go on. Walk the building, ask the current tenants how repairs get handled, and get any promises in writing.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Eureka Valley/Dolores Heights — not a forecast
At or below average
avg 1.4
0
FewerMore

This building has 0 novs (7y), at or below the Eureka Valley/Dolores Heights average of 1.4.

Rent & eviction protection

Is 3364 21St 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
3 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 1900
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
Units3
Floors2
Year built1900
Total area2,580 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot3608021
Ownership

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

Owner name
Mailing address
3364 21st St San Francisco CA 94110
Last sale
June 23, 2005

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.

3364 A 21st St, San Francisco, CA 94110
3364 21st St, San Francisco, CA 94110
3364 B 21st St, San Francisco, CA 94110
Augrented Insights
Initial analysis

The three-unit, two-story multi-family residential building at 3364 21st Street in the Eureka Valley/Dolores Heights neighborhood, owned by Geraldine Poon, has undergone several significant maintenance and infrastructure updates since its construction in 1900. Most recently, in September 2024, the building completed a comprehensive outside sewer and house trap replacement, demonstrating ongoing commitment to maintaining critical infrastructure. Previous substantial work included an underground service conversion completed in 2003, which modernized the electrical systems, and a deck/stairs post replacement project in 2007 that followed a series of housing code violations related to stair repairs and safety during 2007-2011.

The property has faced multiple housing code violations and complaints over the years, with the most concerning issues occurring in 2011 when there were violations related to stair repairs and combustible storage that were abated by March 2011. The building's maintenance history shows regular attention to safety concerns, including the installation of primary locking devices at exterior doors in response to a 2007 violation and various repairs to resolve housing inspection findings. A notable safety incident occurred with a smoke detector malfunction, though fortunately no civilian injuries were reported. Recent external issues primarily involve municipal services unrelated to the building's condition, including a resolved abandoned mattress case (November 2024), a fallen tree (March 2023), and various urban maintenance matters. The building's documentation shows periodic routine housing inspections, with compliance issues being addressed in a timely manner, particularly the significant repairs undertaken following 2007-2011 violations.

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

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Risk rating

How 3364 21St 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
40thpercentile

Out of 1278 buildings in this neighborhood, 767 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
69%
No DBI
violation
31%
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.

Estimated permit spend (past 7 years)

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

Building permits, owner's portfolio

Permits pulled across all of this owner's buildings over 7 years.

12-Month risk forecast
Moderate failure risk 31%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

3364 21St St apartment reviews

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On the map

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The story over time

3364 21St St event timeline

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

2026
Planning Record Jul 06
Removal of two existing exterior doors and a portion of exterior wall to accommodate a new 11' x 8' nanawall folding door system. All work is on the back side of the building, in an area that was substantially modified in 1990. No historical architectural features will be modified, and the alteration is not visible from any street.
Pending Review
Planning ProjectJun 26
Removal of two existing exterior doors and a portion of exterior wall to accommodate a new 11' x 8' nanawall folding door system. All work is on the back side of the building, in an area that was substantially modified in 1990. No historical architectural features will be modified, and the alteration is not visible from any street.

See all 8 events

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

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Every record we have

Full data for 3364 21St St apartments

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

Side by side

How 3364 21St St compares to the neighborhood

This building against comparable properties in Eureka Valley/Dolores Heights. 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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