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1231 11Th Ave

Inner Sunset, SF 94122 1739005 4 units · 2 fl · 1906

This building has far more open problems than almost any other in the neighborhood. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood
Compared to a typical building in Inner Sunset
Above average
avg 1.1
14
FewerMore

This building has 14 novs (7y), above the Inner Sunset average of 1.1.

Rent & eviction protection

Is 1231 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 1906
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 built1906
Total area3,870 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1739005
Ownership

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

Owner name
Vo Tuan Duc Revoc Tr
Mailing address
Tuan Duc Vo Trustee 1112 Masonic Ave San Francisco CA 94117
Last sale
062003

Landlord portfolio

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

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Augrented Insights
Initial analysis

The 4-unit, 2-story multi-family residential building at 1231 11th Avenue in the Inner Sunset was built in 1906 and has experienced several significant maintenance and safety issues over its history. Most recently, in 2020, the building faced serious problems with rodent infestation, with complaints filed in February and November of that year. There were also concerns about a malfunctioning front door lock reported in November 2020, though this complaint was eventually resolved. In 2017-2018, the property underwent stair repairs following a complaint about maintenance issues, including work on back door landings, fire proofing, smoke enclosure doors, and addressing combustible storage concerns. The building has a history of stair and structural maintenance, with earlier repairs documented in the 1980s and 1990s, including foundation work, dry rot repairs, and stair reinforcement.

The property has undergone multiple routine inspections and faced various building code violations, most notably a comprehensive violation in 2001 that required remediation of multiple safety issues, including fire proofing, emergency exit stairs, and sanitation concerns. While many of these historical violations appear to have been resolved, there are ongoing maintenance and safety considerations, particularly regarding building security and pest control. Recent plumbing improvements were completed in 2017, addressing kitchen sink and piping issues in all four units. The building's maintenance history shows a pattern of addressing structural and safety concerns, though with some recurring issues related to building systems and security.

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

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Risk rating

How 1231 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
9th percentile

Out of 1493 buildings in this neighborhood, 1359 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
48%
No DBI
violation
52%
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.

DBI tenant complaints (past 7 years)

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

12-Month severity forecast
No violation 24.3%
Moderate concern 33.2%
Severe concern 42.5%
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

1231 11Th Ave event timeline

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

2026
Building Permit Feb 06
Unit #2: work confined to unit 2 only. restoration of bathroom and kitchen following hazardous tenant damage. emergency plumbing repair and in place replacement of fixture & appliances including laundry appliance hookup adjacent to (e) utilities. no structural change layout unchanged. work..
$15,000 · Issued
DBI ComplaintJan 29
Date last observed: 27-jan-26; identity of person performing the work: tisa vo; floor: 2; unit: 2; exact location: main bldg; building type: residence/dwelling plumbing installation without permit; electrical work being performed w/o permit; ; additional information: bathroom and kitchen were stripped to framing and completely redone. no permits have been posted. work has been going on for several months.;

See all 11 events

Full history back to 2020 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 1231 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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