Free SF apartment background check

1400 47Th Ave

Outer Sunset, SF 94122 1807034 7 units · 2 fl · 1960

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 Outer Sunset
At or below average
avg 1.8
0
FewerMore

This building has 0 novs (7y), at or below the Outer Sunset average of 1.8.

Rent & eviction protection

Is 1400 47Th 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 1960
2 or more units
7 units
Property type
Multi-Family Residential
Zoning
RM1
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 built1960
Total area5,965 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1807034
Ownership

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

Owner name
Auyeung William C &Mabel K
Mailing address
Mabel Auyeung Po Box 320552 San Francisco CA 94132
Last sale
050500

Landlord portfolio

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

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Augrented Insights
Initial analysis

The 7-unit, 2-story multi-family residential building at 1400 47th Avenue in the Outer Sunset, built in 1960 and owned by William C. and Mabel K. Auyeung, has undergone several significant safety and infrastructure improvements over the past decade. Most notably, the building completed a mandatory soft-story retrofit in 2017-2018 with associated revisions, demonstrating compliance with San Francisco's seismic safety requirements. Recent improvements include the installation of a new 400-amp electrical service completed in October 2024, indicating an upgrade to the building's power infrastructure. The building has experienced several maintenance and safety challenges, particularly between 2017-2018, including multiple fire safety violations (regarding egress obstruction, fire escape ladders, fire extinguishers, and alarm systems) which were all abated by February 2018. During the same period, tenants reported issues with mold, cockroach infestations, and structural concerns in stairways and the garage, particularly affecting Unit 5. While these complaints were officially closed, they raise historical concerns about past maintenance responsiveness.

The property has maintained ongoing attention to infrastructure needs, including sewer and trap replacements in 2011, various street space permits, and recent electrical upgrades. The building's history includes two instances of sewer stoppages in late 2010, which were addressed through plumbing interventions. Recent inspections of the property, including a 2021 fire alarm system complaint that was quickly resolved, suggest improved maintenance practices in recent years. Outside the building, multiple 311 calls in 2024 primarily related to street cleaning, with some parking enforcement issues, though these are external to the building's operations. The property has also been involved in planning matters, including a disapproved rear yard variance request and a cancelled proposal for Sprint wireless equipment installation.

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

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Risk rating

How 1400 47Th 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
6th percentile

Out of 632 buildings in this neighborhood, 594 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
33%
No DBI
violation
67%
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.

Neighborhood location

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

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.

12-Month severity forecast
No violation 27.6%
Moderate concern 32.4%
Severe concern 39.9%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

1400 47Th Ave apartment reviews

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The story over time

1400 47Th Ave event timeline

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

2026
311 Request Jun 11
Other illegal parking
Parking Enforcement
311 RequestApr 10
Parking on sidewalk

See all 10 events

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

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Every record we have

Full data for 1400 47Th 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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