Free SF apartment background check

543 Oak St

Hayes Valley, SF 94102 0841023 4 units · 2 fl · 1900

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 Hayes Valley
At or below average
avg 2.3
0
FewerMore

This building has 0 novs (7y), at or below the Hayes Valley average of 2.3.

Rent & eviction protection

Is 543 Oak 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 1900
2 or more units
4 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.

Statewide backstop · AB 1482

California Tenant Protection Act of 2019

Even when a building isn't covered by local rent stabilization, the statewide Tenant Protection Act (AB 1482) may still apply. It caps annual rent increases and requires the landlord to state a legal reason to end most tenancies.

15+ years since occupancy
Built 1900
Annual rent increase cap
5% + CPI, max 10%
Just-cause eviction
After 12 months
Local rent control likely takes priority. This building appears to fall under the local ordinance above, which is stronger than AB 1482. Where a local just-cause ordinance applies, its rules govern instead of the state cap.

AB 1482 does not apply to single-family homes and condos unless owned by a corporation, REIT, or an LLC with a corporate member; to owner-occupied duplexes; or to deed-restricted affordable housing. The Act is in effect until January 1, 2030. Not legal advice — see the California landlord–tenant guide.

Building characteristics
Units4
Floors2
Year built1900
Total area2,400 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0841023
Ownership

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

Owner name
Mailing address
Attn Lee Valerie H 1167 Mission St Fl 1 San Francisco CA 94103
Last sale
032408

Landlord portfolio

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

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Augrented Insights
Initial analysis

543 Oak Street is a 2-story, 4-unit multi-family residential building constructed in 1900, currently owned by 790 Potrero LLC. The property has experienced several significant maintenance and safety issues over the past two decades, with the most pressing concerns appearing between 2009-2010 when multiple units underwent renovation work that was later found to have numerous deficiencies. These included improper plumbing installations in units #1-3 (lack of vents, undersized drains, improper venting), water heater issues, and expired permits for work in units #1 and #2-3, which became the basis for active code enforcement cases. The building has a documented history of water-related problems, including dry rot repairs in 2005-2006 affecting the rear wall and egress stair, and various bathroom and kitchen renovation projects. More recent concerns include an active complaint from 2015 regarding a large hole under the stairs that was covered with debris, and several 311 calls in 2022-2024 reporting sidewalk issues and garbage concerns outside the property.

The building has undergone multiple renovation projects, including substantial electrical updates in 2009 that installed new lighting, outlets, and circuits throughout the units, as well as plumbing improvements. However, many of these projects experienced compliance issues, with several permits expiring without the required inspections being completed. Historical records show earlier repairs including roofing work in 1991, foundation repairs in 1993, and various stair and railing replacements in the early 2000s. The property has also faced various building code violations over the years, including safety concerns related to stairs, gas utility requirements, and lighting, though many of these have been marked as not active after being addressed through various means. The most recent building-related issues primarily involve exterior maintenance and utility concerns, with multiple 311 calls regarding garbage, sidewalk defects, and illegal parking in the vicinity of the property.

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

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Risk rating

How 543 Oak 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
37th percentile

Out of 1027 buildings in this neighborhood, 647 are predicted to be safer.

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

Neighborhood (ZIP code)

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

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 44.8%
Moderate concern 20.7%
Severe concern 34.5%
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

543 Oak St event timeline

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

2026
311 Request Feb 19
Abandoned vehicle
Parking Enforcement

See all 3 events

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

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Every record we have

Full data for 543 Oak St apartments

13 SF public datasets for this parcel — permits, violations, complaints, fire records, 311 calls, planning records, and buyouts.

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