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416-420 Oak St

Hayes Valley, SF 94102 0830006A 3 units · 3 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 416-420 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
3 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
Units3
Floors3
Year built1900
Total area6,000 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot0830006A
Ownership

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

Owner name
Lopez Mary
Mailing address
Mary Lopez & Victor Yanasho 420 Oak St San Francisco CA 94102
Last sale
042902

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.

416 Oak St, San Francisco, CA 94102
418 Oak St, San Francisco, CA 94102
420 Oak St, San Francisco, CA 94102
Augrented Insights
Initial analysis

The three-unit, three-story multi-family residential building at 416-420 Oak Street in Hayes Valley, owned by Mary Lopez, was constructed in 1900 and has undergone several significant renovations and improvements over the past two decades. Most notably, in 2017-2018, the property underwent substantial modernization including kitchen and bathroom remodels ($50,000), rear stair replacement ($15,000), and roof replacement ($12,000), along with the installation of new windows in 2005. The building has maintained regular safety inspections, with the most recent routine safety inspection conducted by Housing Inspection Services in 2018.

Historical records indicate some concerning incidents, including a significant electrical problem in 2001 involving sparks from the fuse box, though this issue was eventually resolved. In 2003, the building received multiple violations related to fire safety, including issues with fire extinguishers, gas meter instructions, combustible storage, and various fire safety requirements, all of which were abated by July 2003. More recently, there have been several infrastructure-related incidents requiring attention, including a water main issue in July 2024 and a damaged streetlight pole in August 2024. The property has experienced recurring issues with street cleaning and debris removal, as evidenced by multiple 311 calls throughout 2024, though most of these were resolved promptly by city services. While there have been occasional fire safety concerns, including a CO detector activation with no CO detected, the building's systems have generally been maintained and updated over time, with all recent permits marked as completed or issued.

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

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Risk rating

How 416-420 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
50th percentile

Out of 1027 buildings in this neighborhood, 514 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
66%
No DBI
violation
34%
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 (ZIP code)

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

Building size

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

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 49.8%
Moderate concern 22.1%
Severe concern 28.1%
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

416-420 Oak St event timeline

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

2025
Electrical Permit Jul 31
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Complete
Electrical PermitJul 22
Rewiring

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

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Every record we have

Full data for 416-420 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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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

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