Free SF apartment background check

3124-3132 21St St

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

This building has significantly more problems than most nearby buildings. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood

Compared to a typical building in Inner Mission

At or below average

avg 2.6

1

FewerMore

This building has 1 novs (7y), at or below the Inner Mission average of 2.6.

12-Month Maintenance Forecast

59%

(risk — lower is better)

Some concerns

Estimated probability of a DBI violation or complaint in the next 12 months.

7-YEAR TREND Violations + complaints / yr

'20

'21

'22

'23

'24

'25

'26

'27*

*Next year, projected from recent activity and predicted risk.

7-Year Historical Counts

1

NOVs (7y)

2

DBI Complaints (7y)

27

311 Calls (7y)

1

Fire Incidents

0

2nd NOVs

0

Dir. Hearings

0

City Atty

9

Permits (7y)

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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.

Building characteristics

Units	7
Floors	2
Year built	1900
Total area	8,787 sq ft
Property type	Multi-Family Residential
Tax status	None
Blocklot	3610013

Ownership

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

Owner name

Sf Baker Investments Llc

Mailing address

Liberty Anthony J Po Box 401210 San Francisco CA 94140

Last sale

011006

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.

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

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

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

18th percentile

Out of 2380 buildings in this neighborhood, 1952 are predicted to be safer.

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 severity forecast

No violation 16.1%

Moderate concern 72.9%

Severe concern 10.9%

Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.

Apartment reviews

3124-3132 21St St apartment reviews

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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.

What this is

Permits issued by the SF Department of Building Inspection for new construction, alterations, and repairs. Includes estimated cost and current permit status.

Permit #	Description	Cost	Filed	Status
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What this is

Plumbing permit applications filed with the SF Department of Building Inspection. Covers plumbing installation, repair, and replacement work.

Permit #	Description	Filed	Status
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What this is

Electrical permit applications filed with the SF Department of Building Inspection. Covers electrical wiring, panel upgrades, and related work.

Permit #	Description	Filed	Status
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What this is

Notices of Violation issued by the SF Department of Building Inspection for code violations. Unresolved notices can escalate to legal action.

Date Filed	Complaint #	Description	Item	Category	Status
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What this is

Complaints filed with the SF Department of Building Inspection about code violations. Tracks the complaint lifecycle from filing through abatement or referral.

Complaint #	Date Filed	Date Abated	Division	Status	Description
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What this is

Planning Department project entitlements — discretionary review, conditional use, variances, and environmental review for this parcel.

Address	Opened	Closed	Status	Description	Applicant
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What this is

Planning Department administrative and compliance records that are not full project entitlements — pre-application meetings, code violations, and referrals.

Address	Opened	Closed	Status	Description	Applicant
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What this is

SFFD fire incidents geo-joined to this parcel. Covers structure fires, alarms, and emergency responses with injury and fatality counts.

Date	Situation	Civilian Injuries	Civilian Fatalities
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What this is

Fire code violations issued by the SFFD. Tracks corrective actions required and resolution status for fire safety code enforcement.

Violation Date	Description	Corrective Action	Status	Close Date
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What this is

Fire code complaints received by the SF Fire Department geo-joined to this parcel. Includes complaint type, disposition, and outcome.

Received	Description	Disposition Date	Disposition
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What this is

SF 311 service requests geo-joined to this parcel. Includes maintenance complaints, street/sidewalk issues, and quality-of-life requests.

Opened	Type	Agency	Category	Details	Status
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What this is

Buildings subject to SF's mandatory soft-story seismic retrofit program. Unreinforced multi-story wood-frame buildings must meet compliance tiers.

Tier	Status
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What this is

Tenant buyout (Ellis Act pre-cursor) agreements recorded with the SF Rent Board. Tracks amounts paid to tenants to vacate rent-controlled units.

Disclosure Date	Buyout Date	Amount	Tenants
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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning