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425-429 Duboce Ave

Duboce Triangle, SF 94117 3537088 3 units · 3 fl · 1905

This building has a higher-than-average number of open problems nearby. Few open issues; problems get fixed quickly. A reasonable bet for a smooth tenancy.

NOVs (7y) vs. neighborhood
Compared to a typical building in Duboce Triangle
At or below average
avg 2.3
0
FewerMore

This building has 0 novs (7y), at or below the Duboce Triangle average of 2.3.

Rent & eviction protection

Is 425-429 Duboce Ave 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 1905
2 or more units
3 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.

Building characteristics
Units3
Floors3
Year built1905
Total area3,960 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3537088
Ownership

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

Owner name
Mark J Magner Sprt Prpt Tr
Mailing address
Magner Mark J Trustee 427 Duboce Ave San Francisco CA 94117
Last sale
022014

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.

427 Duboce Ave, San Francisco, CA 94117
429 Duboce Ave, San Francisco, CA 94117
425 Duboce Ave, San Francisco, CA 94117
Augrented Insights
Initial analysis

The three-story multi-family residential building at 425-429 Duboce Avenue, owned by Mark J Magner Sprt Prpt Tr, was constructed in 1905 and contains three units. The property has undergone several significant improvements over the past decades, with the most substantial being a seismic retrofit completed in 2017 costing $118,000, which included foundation upgrades, shearwall installation, and anchor bolt improvements. Other recent major works include the replacement of four old Federal Pacific electrical panels with grounding in 2021, a voluntary new fire alarm system installation in 2013, and reroofing work in 2013.

The building has experienced various maintenance and safety improvements, including the replacement of rotted structural elements in 2011 and a bathroom/kitchen remodel in 2005. Notably, in 2011, the building underwent a series of corrections in response to multiple violations related to fire safety and security, which were all abated by June 2011. These violations included issues with weatherproofing on siding, exterior door security, fire extinguisher tagging, and egress obstruction. While there have been some recent 311 calls regarding the property (2024-2025), mainly concerning garbage, debris, and parking issues, these are external to the building itself. A fire alarm system complaint was reported in 2024 but was determined to have "No Merit," and historical fire alarm complaints from 2009 and 2011 were similarly resolved. The property has maintained compliance with building codes since addressing the 2011 violations and continues to undergo regular maintenance and system upgrades to ensure resident safety and comfort.

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

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Risk rating

How 425-429 Duboce Ave'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
55th percentile

Out of 287 buildings in this neighborhood, 129 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
69%
No DBI
violation
31%
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.

Neighborhood location

Precise location is a proxy for neighborhood-level risk — some SF blocks have systematically higher DBI activity.

Neighborhood (ZIP code)

The ZIP code captures local housing market and enforcement patterns that affect all buildings in the area.

12-Month severity forecast
No violation 43.7%
Moderate concern 17.3%
Severe concern 39.1%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

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The story over time

425-429 Duboce Ave event timeline

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

2024
Fire Complaint Apr 04
Alarm Systems
No Merit

See all 4 events

Full history back to 2021 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 425-429 Duboce Ave 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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