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495 3Rd Ave

Inner Richmond, SF 94118 1541017 12 units · 3 fl · 1926

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 Richmond
At or below average
avg 0.9
0
FewerMore

This building has 0 novs (7y), at or below the Inner Richmond average of 0.9.

Rent & eviction protection

Is 495 3Rd 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 1926
2 or more units
12 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
Units12
Floors3
Year built1926
Total area7,068 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1541017
Ownership

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

Owner name
Hoi Sang & Vivien Wei-Ying
Mailing address
Hoi Sang U & Vivien Wei-yin 190 Great Circle Dr Mill Valley CA 94941
Last sale
071602

Landlord portfolio

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

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Augrented Insights
Initial analysis

The 12-unit, 3-story multi-family residential building at 495 3rd Avenue in the Inner Richmond, owned by Hoi Sang & Vivien Wei-ying, was constructed in 1926 and has undergone significant safety upgrades over the years. Most recently, in August 2024, the building received comprehensive fire alarm system upgrades to comply with current fire codes, including new low-frequency sounders in sleeping areas and updated devices (cost: $39,580). The building has completed a mandatory soft-story retrofit (Tier 3) in 2017, involving the installation of plywood shear walls and steel moment frames at the ground floor, demonstrating compliance with seismic safety requirements (cost: $88,000).

The building's fire safety systems have had several documented issues requiring attention over the years. Two fire violations were recorded in June 2024 related to alarm systems and fire extinguishers, though all were subsequently abated. Historical records show recurring concerns with fire safety, including multiple fire-related violations and complaints between 2002 and 2010 regarding egress obstructions, and various fire system maintenance issues. The property has undergone several structural improvements, including foundation upgrades in 1992 and brick facade repairs in 1990, suggesting proactive maintenance by the owners. Recent 311 calls indicate ongoing environmental maintenance needs in the vicinity, with multiple reports of debris and illegal postings in 2024, though these are not directly related to building safety or conditions. The building's fire incident record shows only false alarms and system malfunctions, with no actual fires or civilian injuries reported.

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

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Risk rating

How 495 3Rd 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
4th percentile

Out of 1723 buildings in this neighborhood, 1654 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
35%
No DBI
violation
65%
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.

Building size

Total floor area — a proxy for building scale and the number of systems (plumbing, electrical, HVAC) that can fail.

Number of units

The number of units affects how the model reads complaint and violation totals — more units means more potential sources.

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 39.4%
Moderate concern 38.6%
Severe concern 22.0%
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

495 3Rd Ave event timeline

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

2026
311 Request Apr 12
Blocking driveway cite tow
Parking Enforcement
311 RequestFeb 16
Garbage and debris

See all 12 events

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

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Every record we have

Full data for 495 3Rd 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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