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871 46Th Ave

Outer Richmond, SF 94121 1689018 2 units · 2 fl · 1991

This building has a higher-than-average number of open problems nearby. Few open issues; problems get fixed quickly. A reasonable bet for a smooth tenancy.

NOVs (7y) vs. neighborhood
Compared to a typical building in Outer Richmond
Above average
avg 0.7
3
FewerMore

This building has 3 novs (7y), above the Outer Richmond average of 0.7.

Rent & eviction protection

Is 871 46Th 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 1991
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RH2
Not rent-controlled. Buildings constructed after 1978 are generally exempt from SF rent increase limits under the Costa-Hawkins Act.

Based on SF Assessor records. Not legal advice — confirm with the SF Rent Board.

Building characteristics
Units2
Floors2
Year built1991
Total area3,219 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1689018
Ownership

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

Owner name
Dang Ton & Cynthia
Mailing address
42 Chester Wy San Mateo CA 94402
Last sale
021904

Landlord portfolio

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

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Augrented Insights
Initial analysis

The property at 871 46th Avenue is a two-unit, two-story multi-family residential building located in San Francisco's Outer Richmond neighborhood, owned by Dang Ton & Cynthia and constructed in 1991 following the demolition of an existing structure in 1990. The building's history includes several significant construction and modification permits, most notably the original construction in 1990-1991 which included the addition of a skylight, as well as a withdrawn permit in 2008 for deck repairs involving composite wood replacement valued at $4,000.

Recent concerns about building maintenance and safety have emerged, with the most pressing issue being an active housing inspection complaint from December 2024 regarding lack of heat and access to electrical breakers, along with a previous security violation in 2014 concerning deadbolt locks that was promptly addressed within two weeks. The property has faced historical challenges with unauthorized units, including two separate complaints in 2006 about an illegal unit behind the garage, though these were resolved quickly. The surrounding area has experienced various municipal service calls in recent years, particularly regarding parking violations and street maintenance issues, with multiple reports of double parking and sidewalk obstruction between 2021-2024. A pavement defect reported in September 2023 remains unresolved as of the latest available data. The building's permit and violation history suggests generally stable maintenance since the 2014 security issue was resolved, but the recent heating and electrical access concerns indicate potential current maintenance challenges that require attention.

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

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Risk rating

How 871 46Th 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
30th percentile

Out of 1040 buildings in this neighborhood, 728 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
78%
No DBI
violation
22%
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.

Construction spend, owner's portfolio

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

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 severity forecast
No violation 62.6%
Moderate concern 17.0%
Severe concern 20.3%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

871 46Th Ave apartment reviews

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The story over time

871 46Th Ave event timeline

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

2025
Building Permit Aug 28
Reinstall handrails to comply with nov 202541484.
$500 · Issued
Building Violation (NOV)Aug 11
Building violation

See all 7 events

Full history back to 2023 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 871 46Th 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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