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674-684 Corbett Ave

Twin Peaks, SF 94114 2745055 6 units · 3 fl · 1959

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 Twin Peaks
At or below average
avg 3.0
0
FewerMore

This building has 0 novs (7y), at or below the Twin Peaks average of 3.0.

Rent & eviction protection

Is 674-684 Corbett 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 1959
2 or more units
6 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
Units6
Floors3
Year built1959
Total area3,501 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot2745055
Ownership

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

Owner name
Bang Kyoo Sung & Cho Mi Jun
Mailing address
7530 Denison Pl Castro Valley CA 94552
Last sale
061919

Landlord portfolio

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

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Multiple entrances & addresses

Included addresses

All street addresses sharing this blocklot that are covered by this report.

678 Corbett Ave, San Francisco, CA 94114
682 Corbett Ave, San Francisco, CA 94114
676 Corbett Ave, San Francisco, CA 94114
680 Corbett Ave, San Francisco, CA 94114
684 Corbett Ave, San Francisco, CA 94114
674 Corbett Ave, San Francisco, CA 94114
Augrented Insights
Initial analysis

The three-story multi-family residential building at 674-684 Corbett Avenue, owned by Bang Kyoo Sung & Cho Mi Jun, was constructed in 1959 and contains 6 units. The property has undergone several significant improvements and faced various maintenance challenges over the years. Most recently, in May 2024, an active complaint was filed regarding safety hazards with the access stair railing, with reports of failing bars posing risks to residents. The building completed a mandatory soft-story seismic retrofit in 2017-2019, demonstrating compliance with current safety standards. Earlier maintenance history shows recurring issues with water damage and mold, particularly in 2014, when multiple violations were recorded regarding interior surfaces, including the need for painting, addressing water damage, and mold remediation. A 2007 violation was resolved concerning an unpermitted wall furnace installation, and in that same year, there was a period without heating that required attention.

The building's maintenance record shows regular upkeep, including a deck renovation in 2011 to replace rotted wood and railings, and significant infrastructure improvements such as a 2004 electrical upgrade with underground conversion to 200-amp service. Historical maintenance includes addressing fire safety systems in 1983. The property has experienced some recurring issues with exterior cleanliness, as evidenced by multiple 311 calls in early 2025 regarding garbage and debris management around the property, though these are not directly related to the building's structural or habitability conditions. The soft-story retrofit work has been completed, with a Certificate of Final Completion issued, indicating successful compliance with this critical seismic safety requirement.

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

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Risk rating

How 674-684 Corbett 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
53th percentile

Out of 172 buildings in this neighborhood, 81 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
61%
No DBI
violation
39%
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.

DBI tenant complaints (past 7 years)

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

Neighborhood location

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

12-Month severity forecast
No violation 39.5%
Moderate concern 27.0%
Severe concern 33.5%
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

674-684 Corbett Ave event timeline

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

2026
311 Request Apr 03
Other
defaced ok
311 RequestFeb 05
Garbage and debris

See all 6 events

Full history back to 2024 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 674-684 Corbett 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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