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2420 Folsom St

Inner Mission, SF 94110 3611005 7 units · 3 fl · 1965

This building has a substantial enforcement record over the last seven years, and our model predicts continuing maintenance failures over the next 12 months. Read the records below before you sign. Ask which issues were resolved, get repair commitments in writing, and inspect the unit yourself.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Inner Mission — not a forecast
Above average
avg 2.7
14
FewerMore

This building has 14 novs (7y), above the Inner Mission average of 2.7.

Rent & eviction protection

Is 2420 Folsom 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 1965
2 or more units
7 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 1965
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
Units7
Floors3
Year built1965
Total area5,177 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3611005
Ownership

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

Owner name
Mailing address
Kong Simon Hok Lai & Yin Ah 823 42Nd Ave San Francisco CA 94121
Last sale
March 30, 2001

Landlord portfolio

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

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Augrented Insights
Initial analysis

2420 Folsom Street is a 7-unit, 3-story multi-family residential building constructed in 1965 in San Francisco's Inner Mission district. The property, currently owned by 14th Folsom LLC, has experienced recurring plumbing issues in recent years, with multiple sewage-related complaints documented between 2020 and 2024, including significant problems in 2021 with reports of sewage leaks and human waste on the sidewalk. The building is currently facing non-compliance with Soft Story retrofit requirements, as indicated by an active complaint from October 2019. Recent developments include an interior renovation proposal from March 2024 to add 3 ADU units by converting the ground floor garage, along with infrastructure upgrades for bicycle parking and utilities.

The building's maintenance history shows both improvements and ongoing challenges. In 2018, the property underwent sprinkler installation in the garage and addressed several permit violations, including the removal of unauthorized modifications such as a wet bar/kitchenette. Fire safety issues were notably present in 2015-2017, with multiple violations related to alarm systems, extinguishers, blocked exits, and combustible materials, all of which were eventually corrected. More recent plumbing work has included drain pipe replacements in 2023 and 2019, though these repairs have not fully resolved the recurring sewage issues. The property has also experienced various maintenance matters, including a building fire (104) and system malfunctions, though no civilian injuries were reported in these incidents.

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

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Risk rating

How 2420 Folsom 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
1stpercentile

Out of 2380 buildings in this neighborhood, 2356 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
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.

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.

Director's hearing rate, owner's portfolio

Per-building rate of director's hearings across the owner's portfolio.

12-Month risk forecast
High failure risk 87%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

2420 Folsom St apartment reviews

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On the map

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The story over time

2420 Folsom St event timeline

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

2026
Planning Record Mar 30
The project proposes to replace parking spaces located at the ground floor of an existing multi-story building with three new Accessory Dwelling Units using the state ADU program. The scope includes adding new bicycle parking spaces, new gas and electric meter rooms, and a new street tree.
Under Review
Building PermitMar 21
Interior renovation to add 3 new adu units per state program to replace garage at ground floor. new bicycle parking, new gas and electrical room, new street tree, no change to existing use and height.

See all 16 events

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

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Every record we have

Full data for 2420 Folsom St apartments

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

Side by side

How 2420 Folsom St compares to the neighborhood

This building against comparable properties in Inner Mission. 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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