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426-428 Sanchez St

Eureka Valley/Dolores Heights, SF 94114 3581006 2 units · 2 fl · 1908

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 Eureka Valley/Dolores Heights
At or below average
avg 1.3
0
FewerMore

This building has 0 novs (7y), at or below the Eureka Valley/Dolores Heights average of 1.3.

Rent & eviction protection

Is 426-428 Sanchez St 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 1908
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RH3
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
Units2
Floors2
Year built1908
Total area2,950 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot3581006
Ownership

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

Owner name
Tong Family Trust
Mailing address
Darick M & Noriko Y Tong Co 428 Sanchez St San Francisco CA 94114
Last sale
051120

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.

428 Sanchez St, San Francisco, CA 94114
426 Sanchez St, San Francisco, CA 94114
Augrented Insights
Initial analysis

The property at 426-428 Sanchez Street is a two-unit, two-story multi-family residential building constructed in 1908, currently owned by the Tong Family Trust. The building has undergone several significant improvements over the past three decades, with the most recent major renovation occurring in 2019, involving the conversion of existing bathroom spaces into new bathroom and half-bath facilities, including associated plumbing and electrical work (costing $13,000). Prior to this, between 2012-2013, the property underwent similar bathroom conversions and improvements, including a half bathroom addition and solar panel installation (2.08kW system) in 2015. The building's maintenance record shows attention to basic infrastructure, including reroofing in 2005 and various electrical upgrades, with a notable solar installation in 2015 demonstrating an investment in sustainable energy.

The property's recent history shows three open graffiti-related incidents in late 2024, with at least one affecting the sidewalk in front of the property, though these are externally managed issues not directly related to the building's condition. Between 2022-2024, there have been multiple general cleaning and maintenance calls, primarily relating to street and sidewalk maintenance, all of which have been resolved. Earlier modifications to the building included comprehensive bathroom remodeling work in 1991 and 1994, along with various electrical improvements in the early 2000s, indicating a consistent pattern of updating and maintaining basic facilities across decades.

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

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Risk rating

How 426-428 Sanchez St'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
69th percentile

Out of 1278 buildings in this neighborhood, 396 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
83%
No DBI
violation
17%
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.

Neighborhood (ZIP code)

The ZIP code captures local housing market and enforcement patterns that affect all buildings in the area.

Building permits, owner's portfolio

Permits pulled across all of this owner's buildings over 7 years.

12-Month severity forecast
No violation 66.6%
Moderate concern 17.3%
Severe concern 16.1%
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

426-428 Sanchez St event timeline

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

2019
Plumbing Permit Aug 22
Converting 1 bath into 2. add toilet, tie to (e) drain. new finishes, new fixtures
Complete
Electrical PermitAug 22
Convert 1 bath into 2. lights, switches, recepactacles, fans

See all 2 events

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

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Every record we have

Full data for 426-428 Sanchez St 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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