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308 Duncan St

Noe Valley, SF 94131 6592009 3 units · 3 fl · 1900

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 Noe Valley — not a forecast
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 308 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 1900
2 or more units
3 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.

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 1900
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
Units3
Floors3
Year built1900
Total area3,128 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot6592009
Ownership

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

Owner name
Mailing address
P.o. Box 179 Novato CA 94948
Last sale
January 13, 2017

Landlord portfolio

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

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Augrented Insights
Initial analysis

The three-unit, three-story multi-family residential building at 308 Duncan Street in Noe Valley, built in 1900, has undergone several significant renovations and safety upgrades in recent years under the ownership of 437 Duncan St LLC. The property, consisting of flats and duplex units, has seen substantial improvements including the installation of a comprehensive fire sprinkler system throughout the building in 2019-2020, and a complete fire alarm system upgrade in 2021-2022 featuring new low-frequency sounders and smoke detection equipment. Major renovation work was performed in 2017-2018, including an expansion of the front top floor unit, relocation of the rear unit, and addressing multiple safety concerns regarding the front porch and rear stairs, which had previously generated several building violations and complaints regarding dry rot and structural issues.

The building's recent history shows a pattern of both proactive improvements and ongoing challenges. In addition to the fire safety upgrades, the property underwent significant plumbing and electrical work between 2020 and 2022, including the installation of a new radiant heating system and multiple unit remodels featuring new kitchens and bathrooms. However, there remains an active complaint regarding the roof deck constructed over the garage in 2020, with concerns about neighbor notification and noise impacts. Historical issues from 2016 regarding water intrusion and plumbing leaks have been resolved, and the building underwent routine inspections in 1999 and 2008 that did not result in identified violations. Recent permits also indicate ongoing maintenance and improvement efforts, including repairs to the front porch and rear staircase systems to address previous safety concerns.

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

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Risk rating

How 308 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

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
66thpercentile

Out of 1879 buildings in this neighborhood, 639 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
84%
No DBI
violation
16%
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.

DBI tenant complaints (past 7 years)

Formal complaints tenants filed with DBI about this building over 7 years.

Building age

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

DBI complaints, owner's portfolio

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

12-Month risk forecast
Low failure risk 16%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

308 Duncan St apartment reviews

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On the map

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The story over time

308 Duncan St event timeline

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

2025
Fire Complaint Nov 10
Alarm Systems
Condition Corrected

See all 17 events

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

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Every record we have

Full data for 308 Duncan St apartments

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

Side by side

How 308 Duncan St compares to the neighborhood

This building against comparable properties in Noe Valley. Toggle filters to narrow the peer group.

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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

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