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3121 Broderick St

Marina, SF 94123 0934002 6 units · 2 fl · 1959

A handful of records on file over the last seven years, and our model puts this building at a low 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 Marina — not a forecast
At or below average
avg 1.1
0
FewerMore

This building has 0 novs (7y), at or below the Marina average of 1.1.

Rent & eviction protection

Is 3121 Broderick 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 1959
2 or more units
6 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 1959
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
Units6
Floors2
Year built1959
Total area4,602 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0934002
Ownership

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

Owner name
Mailing address
Mario Donati 2770 Lyon St San Francisco CA 94123
Last sale
—

Landlord portfolio

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

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Augrented Insights
Initial analysis

The 6-unit, 2-story multi-family residential building at 3121 Broderick Street in the Marina district, owned by Donati Investments and constructed in 1959, has undergone several significant maintenance and repair projects over the past two decades. Most notably, in March 2022, the building completed a $10,000 reroofing project, and between September and October 2012, substantial exterior work was performed including stucco removal, dry rot repairs, and the installation of fiber cement siding on the rear of the building. Historical records show the building has been properly maintained, including a furnace replacement in 2010 (though this permit has since expired) and an earlier reroofing project in 1995.

The building has experienced some safety-related issues in the past, most notably a cluster of fire violations in June 2000 related to egress obstructions, which were resolved by November 2000. Since then, routine housing inspections in 2006 showed no significant concerns. Recent activity around the property has primarily involved external issues rather than building-specific problems, including multiple reports of street noise and parking violations between 2021 and 2024, as well as several instances of abandoned furniture and debris on public property. Fire department responses to the building have been limited to minor incidents, including false alarms and detector activations, with no reported injuries. The property appears to be in good structural condition with regular maintenance being performed, though recent years have seen some tenant-related issues typical for urban residential buildings, such as noise complaints and parking disputes.

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

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Risk rating

How 3121 Broderick 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
42ndpercentile

Out of 988 buildings in this neighborhood, 573 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
74%
No DBI
violation
26%
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.

Building age

Older buildings tend to have more maintenance challenges; SF's pre-1906 earthquake housing stock carries distinct risk.

Owner's portfolio size

Number of SF parcels this owner is registered on — larger portfolios have distinct risk patterns.

12-Month risk forecast
Low failure risk 26%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

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On the map

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8 found
The story over time

3121 Broderick St event timeline

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

2026
311 Request Feb 17
311 service request
Encampment
311 RequestFeb 17
311 service request

See all 8 events

Full history back to 2022 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 3121 Broderick St apartments

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

Side by side

How 3121 Broderick St compares to the neighborhood

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