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3124-3132 21St St

Inner Mission, SF 94110 3610013 7 units · 2 fl · 1900

A handful of records on file over the last seven years, and our model predicts a high risk of further maintenance problems 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 Inner Mission — not a forecast
At or below average
avg 2.7
1
FewerMore

This building has 1 novs (7y), at or below the Inner Mission average of 2.7.

The bar and the rating point different ways because they measure different things: the bar counts DBI violations already on file, the rating forecasts the next 12 months.

Rent & eviction protection

Is 3124-3132 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
7 units
Property type
Multi-Family Residential
Zoning
RM1
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
Units7
Floors2
Year built1900
Total area8,787 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3610013
Ownership

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

Mailing address
Liberty Anthony J Po Box 401210 San Francisco CA 94140
Last sale
December 10, 2004

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.

3126 21st St, San Francisco, CA 94110
3132 A 21st St, San Francisco, CA 94110
3124 21st St, San Francisco, CA 94110
3124 A 21st St, San Francisco, CA 94110
3128 21st St, San Francisco, CA 94110
3132 B 21st St, San Francisco, CA 94110
3132 C 21st St, San Francisco, CA 94110
3132 21st St, San Francisco, CA 94110
3130 21st St, San Francisco, CA 94110
Augrented Insights
Initial analysis

The property at 3124-3132 21st Street in San Francisco's Inner Mission neighborhood is a 7-unit, 2-story multi-family residential building constructed in 1900 and currently owned by SF Baker Investments LLC. The building has undergone significant recent improvements, including the installation of a new automatic alarm system in 2023 (with a completed electrical upgrade to comply with fire safety requirements), the addition of two ADUs in 2022 (with associated plumbing and electrical work), and an ongoing roof replacement project initiated in 2024 costing $45,000. The property successfully completed its mandatory soft-story retrofit program, achieving Tier 3 compliance, though there was a prior enforcement action filed in 2019 for non-compliance that was resolved in 2023.

Historical records show various improvements and issues addressed over the years, including a major unit legalization project completed in 2018 that expanded the building from 7 to 9 units. The building has experienced some maintenance challenges in the past, with violations recorded in 2005 related to heating, stair repairs, and wall conditions, though these were all abated by August 2005. More recent maintenance work has included the installation of a comprehensive sprinkler system in 2022, replacement of entrance stairs in 2022, and various plumbing upgrades including sewer line work in 2015 and water service improvements in 2022. The building has also been subject to routine inspections and some external issues noted in 311 calls, primarily relating to street cleaning and maintenance matters outside the building itself.

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

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Risk rating

How 3124-3132 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
18thpercentile

Out of 2380 buildings in this neighborhood, 1952 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
41%
No DBI
violation
59%
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.

Building size

Total floor area — a proxy for building scale and the number of systems (plumbing, electrical, HVAC) that can fail.

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.

12-Month risk forecast
High failure risk 59%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

3124-3132 21St St apartment reviews

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On the map

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The story over time

3124-3132 21St St event timeline

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

2026
Planning Record Jan 20
Variance required to enable a Lot Split. Existing lot contains 2 residential buildings sharing a common wall in some places and containing 9 residential units. A variance will be needed for lack of open space and for less than the minimum lot size. Granting of the variance will allow the splitting of the lot, and this will allow the property owner to obtain better financing as financing for 9 units on one lot, and two buildings on one, has been very hard to obtain as it is a very unusual situation. Property insurance has increased each of the last several years by a great deal as insurance companies perceive such an unusual lot with these features to be very risky and that has lead to huge premium increases which has allowed for less funds to maintain units for the benefit of nine tenants.
Under Review

See all 18 events

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

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Every record we have

Full data for 3124-3132 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 3124-3132 21St 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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