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340 Duncan St

Noe Valley, SF 94131 6592025 2 units · 2 fl · 1890

Nothing on record for this building in the last seven years, and our model puts it at a low risk of maintenance problems over the next 12 months. No public enforcement record to go on. Walk the building, ask the current tenants how repairs get handled, and get any promises in writing.

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 340 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 1890
2 or more units
2 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 1890
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
Units2
Floors2
Year built1890
Total area2,144 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot6592025
Ownership

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

Mailing address
340 Duncan St San Francisco CA 94131
Last sale
February 04, 1987

Landlord portfolio

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

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Augrented Insights
Initial analysis

340 Duncan Street is a two-unit, two-story multi-family residential building located in San Francisco's Noe Valley neighborhood, owned by the Careway Family Revocable Living Trust. Built in 1890, this flats and duplex-style building has undergone several significant renovations, with the most substantial work occurring between 2002-2003. During this period, a comprehensive $75,000 renovation project was completed to construct a new 3-car garage with stairs, an exit corridor, and electrical and plumbing updates, followed by additional structural improvements including the replacement of a glu-lam header and installation of steel frames. The building underwent window-related improvements in 2003, involving the replacement of nine windows, repair of dry rot, and associated patching and painting work totaling $22,000.

The property has seen various maintenance and upgrade work over the years, including two kitchen remodels in the late 1980s, installation of new furnaces and ducts in 2008, and some street space permitting in 2008. A garage modification project in the rear yard with a roof deck and stairs was also approved, demonstrating the property's ongoing development history. The only recorded parking-related complaint was in 2018 regarding a blocked driveway, but this case was deemed invalid due to incomplete reporting information. The building's maintenance and improvement history suggests regular upkeep and modernization efforts by the ownership, with no documented safety concerns or habitability issues on record.

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

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Risk rating

How 340 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
91stpercentile

Out of 1879 buildings in this neighborhood, 169 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
91%
No DBI
violation
9%
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.

Construction spend, owner's portfolio

Estimated permit value across all of this owner's buildings.

Neighborhood location

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

Estimated permit spend (past 7 years)

Dollar value of permits pulled at this address — large recent spend can signal deferred-maintenance catch-up.

12-Month risk forecast
Low failure risk 9%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

340 Duncan St apartment reviews

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On the map

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The story over time

340 Duncan St event timeline

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

2025
311 Request Mar 02
Encampment
Encampment

See all 1 events

Full history back to 2025 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 340 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 340 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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