Free SF apartment background check

1851 Vallejo St

Pacific Heights, SF 94123 0568021 9 units · 4 fl · 1973

This building has significantly more problems than most nearby buildings. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood
Compared to a typical building in Pacific Heights
At or below average
avg 1.4
0
FewerMore

This building has 0 novs (7y), at or below the Pacific Heights average of 1.4.

Rent & eviction protection

Is 1851 Vallejo 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 1973
2 or more units
9 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
Units9
Floors4
Year built1973
Total area10,528 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0568021
Ownership

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

Owner name
Poy Wong Marital Deduction
Mailing address
May Har Wong, Trustee 1851 Vallejo St Apt 401 San Francisco CA 94123
Last sale
000000

Landlord portfolio

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

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Augrented Insights
Initial analysis

The four-story, 9-unit apartment building at 1851 Vallejo Street in Pacific Heights, built in 1973 and currently owned by Poy Wong Marital Deduction, has experienced several significant maintenance and safety issues in recent years. Most notably, there have been recent water intrusion problems in unit 302, with two complaints filed in September and October 2023 regarding leaking ceilings and water damage, allegedly related to unpermitted work on the roof patio. These incidents resulted in extensive exposure to mold and bacteria due to delayed repairs and inadequate moisture mitigation. The building has a history of water-related issues, with plumbing work including a water heater replacement completed in 2010, and a reroofing project permit issued in 2003.

The property has faced multiple safety and maintenance challenges over the years, particularly evident in a series of violations documented in December 2001 that included problems with fire safety equipment (fire extinguisher maintenance, smoke doors, and egress obstructions) and security concerns (exterior door self-closing devices). Although these violations were abated by February 2002, there have been more recent fire safety concerns, with violations related to fire extinguishers and sprinkler systems documented in 2015 and 2021, both of which were marked as corrected. Routine inspections of the common areas have been conducted periodically, most recently in 2013, and there was one reported instance of unpermitted work involving jackhammering in February 2022. The building's records also show multiple 311 calls between 2020 and 2024 related to various street cleaning issues outside the building, including reports of waste and garbage, though these are not directly related to the building's internal conditions or maintenance.

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

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Risk rating

How 1851 Vallejo 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
17th percentile

Out of 963 buildings in this neighborhood, 799 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
41%
No DBI
violation
59%
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.

DBI tenant complaints (past 7 years)

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

12-Month severity forecast
No violation 25.8%
Moderate concern 45.3%
Severe concern 28.9%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
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The story over time

1851 Vallejo St event timeline

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

2026
DBI Complaint May 12
Date last observed: 11-may-26; time last observed: 10pm; floor: lobby; exact location: main bldg; building type: residence/dwelling disabled acc: elevator/lift; ; additional information: it has been over 4 months since it was last operating;
Housing Inspection Services

See all 10 events

Full history back to 2021 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 1851 Vallejo 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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