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1271 11Th Ave

Inner Sunset, SF 94122 1739015 4 units · 2 fl · 1915

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

NOVs (7y) vs. neighborhood
Compared to a typical building in Inner Sunset
At or below average
avg 1.1
0
FewerMore

This building has 0 novs (7y), at or below the Inner Sunset average of 1.1.

Rent & eviction protection

Is 1271 11Th 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 1915
2 or more units
4 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
Units4
Floors2
Year built1915
Total area3,480 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1739015
Ownership

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

Owner name
Kosoff Jayni Siu & Brian W
Mailing address
8025 Nw Prominence Ct Portland OR 97229
Last sale
042899

Landlord portfolio

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

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Augrented Insights
Initial analysis

Located in San Francisco's Inner Sunset neighborhood, this two-story multi-family residential building at 1271 11th Avenue was constructed in 1915 and contains four units. The property has undergone several significant improvements over the years, with the most substantial recent work being a 2017 window replacement project costing $16,600, involving the installation of 16 new Marvin wood double-hung windows with specific design features. Other notable improvements include repair of rear exterior stairs and landings in 2007 ($2,000), kitchen cabinet replacement in 2003 ($2,500), and a complete reroofing in 1993.

The building experienced a series of violations in 2007 during a routine inspection that revealed multiple safety issues, including fire safety concerns (missing fire extinguisher and combustible storage problems), structural concerns (stairs needing repair), and lead paint hazards. These violations were abated by June 2009. Earlier issues included complaints about deteriorating windows and plumbing problems in 2001, which were also resolved. The property has maintained regular maintenance with multiple street space and sidewalk repairs, including a 2010 repair. Recent years have shown no major building violations, though there have been several 311 calls regarding street and sidewalk issues near the property between 2018 and 2022, primarily related to pavement defects and garbage collection matters, which were all resolved promptly.

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

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Risk rating

How 1271 11Th 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
16th percentile

Out of 1493 buildings in this neighborhood, 1254 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.

Neighborhood (ZIP code)

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

Building age

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

12-Month severity forecast
No violation 39.1%
Moderate concern 20.8%
Severe concern 40.1%
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

1271 11Th Ave event timeline

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

No dated public records on file yet.
Every record we have

Full data for 1271 11Th 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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