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3591 20Th St

Inner Mission, SF 94110 3609042 28 units · 4 fl · 1908

This building has far more open problems than almost any other in the neighborhood. Renters here report frequent, slow-to-fix problems. Get repair promises in writing and check the unit before signing.

NOVs (7y) vs. neighborhood
Compared to a typical building in Inner Mission
Above average
avg 2.6
105
FewerMore

This building has 105 novs (7y), above the Inner Mission average of 2.6.

Rent & eviction protection

Is 3591 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 1908
2 or more units
28 units
Property type
Multi-Family Residential
Zoning
VALEN
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 1908
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
Units28
Floors4
Year built1908
Total area18,120 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3609042
Ownership

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

Mailing address
220 Montgomery St Fl 20 San Francisco CA 94104
Last sale
063020

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.

3591 20th St, San Francisco, CA 94110
903 Valencia St, San Francisco, CA 94110
907 Valencia St, San Francisco, CA 94110
909 Valencia St, San Francisco, CA 94110
901 Valencia St, San Francisco, CA 94110
Augrented Insights
Initial analysis

The 3591 20th Street building is a 4-story multi-family residential structure with 28 units, built in 1908, located in San Francisco's Inner Mission neighborhood. The property has undergone numerous improvements and renovations in recent years, including multiple kitchen and bathroom remodels in units #9, #18 (cancelled), and #24 during 2021-2022, and significant commercial space improvements in 2019 including a change from commercial store to limited restaurant. A series of fire safety upgrades were implemented between 2018-2020, including the installation of a wireless fire alarm system, new sprinkler heads, and kitchen remodels with associated electrical and plumbing work.

The building has faced several maintenance challenges in recent years, with multiple tenant complaints in 2019 regarding pests, plumbing issues, and hot water problems. A leak in the ceiling complaint from January 2020 remains active as of the latest records. The property has a history of fire safety violations, including a recent sleeping area requirement violation issued in November 2023, and past issues with alarm systems and sprinkler maintenance. Historical violations from 2000 included various building maintenance issues such as damaged walls, electrical problems, and fire safety concerns, though these were abated by April 2008. The building underwent significant ground floor facade restoration and window refurbishment work in 2019 to comply with historical preservation requirements. Recent 311 calls from January 2025 indicate ongoing concerns with garbage management in the vicinity of the property.

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

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Risk rating

How 3591 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
2th percentile

Out of 2380 buildings in this neighborhood, 2332 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
13%
No DBI
violation
87%
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.

NOV rate, owner's portfolio

Per-building NOV rate across everything this owner manages — high rates signal pattern neglect.

DBI tenant complaints (past 7 years)

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

12-Month severity forecast
No violation 11.7%
Moderate concern 25.8%
Severe concern 62.6%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

3591 20Th St apartment reviews

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On the map

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The story over time

3591 20Th St event timeline

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

2026
DBI Complaint Jun 22
The storefront was observed to be an active construction site without a permit.
Code Enforcement Section
Planning ProjectApr 17
Like-for-like replacement of four 34" x 48" wood sash windows with new wood sash, single-tempered windows in an interior light well. No changes to the openings, use or building area are proposed.

See all 36 events

Full history back to 2019 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 3591 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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