Free SF apartment background check

348 Duncan St

Noe Valley, SF 94131 6592052 7 units · 2 fl · 1938

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 348 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 1938
2 or more units
7 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
Units7
Floors2
Year built1938
Total area4,100 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot6592052
Ownership

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

Owner name
Noe Valley Investors I Llc
Mailing address
Rutherford Investment 770 Tamalpais Dr #202 Corte Madera CA 94925
Last sale
030419

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.

348 Duncan St, San Francisco, CA 94131
1431 Sanchez St, San Francisco, CA 94131
1425 Sanchez St, San Francisco, CA 94131
1441 Sanchez St, San Francisco, CA 94131
1423 Sanchez St, San Francisco, CA 94131
1435 Sanchez St, San Francisco, CA 94131
Augrented Insights
Initial analysis

The 7-unit, 2-story apartment building at 348 Duncan Street in Noe Valley, owned by Noe Valley Investors I LLC, was constructed in 1938 and has undergone significant renovations over the past decade. Most recent improvements include Unit #1 renovations in 2018 featuring an interior remodel, bedroom door relocation, and washer/dryer installation, with similar updates also completed in other units. Substantial building-wide enhancements occurred in 2013 including window replacements on both Duncan and Sanchez facades, facade improvements, and the installation of a 400-amp electrical service upgrade. The building has experienced several construction-related complaints over the years, particularly in 2012-2013, with issues reported including falling debris, unsafe working conditions, and concerns about illegal construction affecting tenant safety. These complaints were investigated and marked as not active.

Recent maintenance issues have primarily involved external matters, including multiple reports of graffiti in 2024, a water leak in late 2024, and various sign repairs. There were also some concerns about tree damage to the property in February 2024. The building has maintained an active record of unit improvements, with recent permits showing continued modernization efforts, including kitchen and bathroom remodels, electrical upgrades, and plumbing improvements. The property has undergone periodic routine inspections, with the most recent building-wide assessments appearing to focus on exterior maintenance and common area upkeep. A notable recent development is a proposed lot split project that was reviewed for the property lines between 348 Duncan Street and 1423 Sanchez Street.

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

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Risk rating

How 348 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
60%
No DBI
violation
40%
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 permits, owner's portfolio

Permits pulled across all of this owner's buildings over 7 years.

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 61.2%
Moderate concern 16.2%
Severe concern 22.6%
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

348 Duncan St event timeline

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

2026
311 Request Feb 23
Overgrown tree
other

See all 4 events

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

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Every record we have

Full data for 348 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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