Free SF apartment background check

4377-4379 17Th St

Corona Heights, SF 94114 2652021 2 units · 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 Corona Heights
At or below average
avg 1.2
0
FewerMore

This building has 0 novs (7y), at or below the Corona Heights average of 1.2.

Rent & eviction protection

Is 4377-4379 17Th 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
RH2
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
Floors
Year built1908
Total area1,940 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot2652021
Ownership

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

Owner name
Williston Edward Bradford
Mailing address
4377 17th St San Francisco CA 94114
Last sale
022212

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.

4379 17th St, San Francisco, CA 94114
176 Corbett Ave, San Francisco, CA 94114
4377 17th St, San Francisco, CA 94114
Augrented Insights
Initial analysis

The property at 4377-4379 17th Street is a 2-unit multi-family residential building constructed in 1908 in the Corona Heights neighborhood, currently owned by Edward Bradford Williston. The building underwent significant renovations in 2008-2009, including major structural work such as capping the front foundation, replacing the rear foundation, lowering the basement floor for legal ceiling height, and comprehensive unit remodeling including bathroom and kitchen renovations in both units. The 2007-2008 period marked a critical time for this property, as it faced serious building violations related to an unauthorized basement unit that prompted multiple inspections and citations. These violations noted various safety concerns including inadequate fire resistance materials, unapproved electrical wiring, plumbing issues, ventilation problems, and inadequate emergency exits. The unauthorized basement unit was ultimately removed in 2007 under permit #200708089186.

Following the 2008-2009 renovations, which included complete electrical rewiring, new gas furnaces, and various plumbing upgrades, the building's systems received substantial modernization. Recent activity at the property has been primarily related to parking enforcement issues, with multiple citations issued between 2024 and 2025 for driveway blockages. There is currently an open issue regarding a damaged tree reported in September 2024. The building's violation history shows resolution of all major safety concerns as of October 2008, with no subsequent building violations recorded. The comprehensive nature of the 2008-2009 renovations, addressing both structural and systems improvements, suggests significant investment in the building's long-term habitability and safety.

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

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Risk rating

How 4377-4379 17Th 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
55th percentile

Out of 348 buildings in this neighborhood, 157 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
84%
No DBI
violation
16%
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 age

Older buildings tend to have more maintenance challenges; SF's pre-1906 earthquake housing stock carries distinct risk.

Neighborhood location

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

Building permits, owner's portfolio

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

12-Month severity forecast
No violation 76.9%
Moderate concern 15.6%
Severe concern 7.5%
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

4377-4379 17Th St event timeline

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

No dated public records on file yet.
Every record we have

Full data for 4377-4379 17Th 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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