Free SF apartment background check

406-414 Duncan St

Noe Valley, SF 94131 6591010 8 units · 2 fl · 1910

This building has more problems than most buildings in this neighborhood. Few open issues; problems get fixed quickly. A reasonable bet for a smooth tenancy.

NOVs (7y) vs. neighborhood
Compared to a typical building in Noe Valley
At or below average
avg 1.2
0
FewerMore

This building has 0 novs (7y), at or below the Noe Valley average of 1.2.

Rent & eviction protection

Is 406-414 Duncan 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 1910
2 or more units
8 units
Property type
Multi-Family Residential
Zoning
RH2
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
Units8
Floors2
Year built1910
Total area6,080 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot6591010
Ownership

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

Owner name
So Kenneth C&Eva S Revoc Tr
Mailing address
Kenneth C & Eva S So 15 26Th Ave San Francisco CA 94121
Last sale
000000

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.

408 Duncan St, San Francisco, CA 94131
412 Duncan St, San Francisco, CA 94131
414 Duncan St, San Francisco, CA 94131
406 Duncan St, San Francisco, CA 94131
410 Duncan St, San Francisco, CA 94131
Augrented Insights
Initial analysis

The property at 406-414 Duncan Street in Noe Valley is an 8-unit, 2-story multi-family residential building constructed in 1910, currently owned by the So Kenneth C&eva S Revocable Trust. The building has undergone several significant safety and maintenance improvements in recent years, most notably a comprehensive fire alarm system upgrade in September 2023 costing $32,885 to comply with current fire code requirements, including the installation of low-frequency sounders in sleeping areas and updating all existing devices. In 2016, the building completed mandatory soft-story seismic retrofitting and addressed both structural and cosmetic issues, including dry rot repair of the front siding and stucco work.

The building has experienced some maintenance challenges over its history, with multiple building violations addressed between 2003 and 2015, such as stair repairs, mold remediation, and electrical maintenance. Recent inspection history shows active maintenance of building systems, including a sewer replacement in 2019 and various interior updates between 2015-2023. The property has had periodic routine inspections, with the most recent building permit activity indicating ongoing commitment to maintaining safety standards. Sidewalk defects were reported in September 2023, and there have been several reports of abandoned vehicles in the vicinity between 2019-2024, though these are not directly related to building conditions. The building's history shows prompt attention to violations and a pattern of regular maintenance, with no active violations or complaints as of October 2023.

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

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Risk rating

How 406-414 Duncan 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
23th percentile

Out of 1879 buildings in this neighborhood, 1447 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
61%
No DBI
violation
39%
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 size

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

Owner's portfolio size

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

12-Month severity forecast
No violation 56.3%
Moderate concern 24.1%
Severe concern 19.6%
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

406-414 Duncan St event timeline

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

2026
Building Permit Mar 25
Exterior: put up asphalt shingle (repair), paint moldings, clean fire escape and gutters.
$9,000 · Complete

See all 5 events

Full history back to 2023 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 406-414 Duncan St 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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