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786-788 17Th Ave

Central Richmond, SF 94118 1659024 2 units · 2 fl · 1920

This building has significantly more problems than most nearby buildings. Few open issues; problems get fixed quickly. A reasonable bet for a smooth tenancy.

NOVs (7y) vs. neighborhood
Compared to a typical building in Central Richmond
Above average
avg 0.5
4
FewerMore

This building has 4 novs (7y), above the Central Richmond average of 0.5.

Rent & eviction protection

Is 786-788 17Th Ave 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 1920
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
Floors2
Year built1920
Total area2,950 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1659024
Ownership

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

Owner name
Tan Guo Zhi
Mailing address
3305 Geary Mare Wy Antelope CA 95843
Last sale
061807

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.

786 17th Ave, San Francisco, CA 94118
788 17th Ave, San Francisco, CA 94118
Augrented Insights
Initial analysis

The property at 786-788 17th Avenue is a two-unit, two-story multi-family residential building located in the Central Richmond neighborhood, owned by Tan Guo Zhi and constructed in 1920. The building has experienced several significant issues in 2023 that warrant attention. Most notably, there are active violations regarding an unpermitted studio with full kitchen and bathroom behind the garage on the ground floor, including unapproved wiring and plumbing, and a change of use without proper permits. Habitability concerns were raised in January 2023 regarding the garage area, with reports of caving ceiling, faulty air ducts, and possible asbestos contamination that initially generated some urgency about air quality concerns, though this particular complaint is no longer active. A plumbing improvement was completed in October 2021, involving the replacement of a house trap and approximately 30 feet of sewer pipe. An in-law unit legalization process was initiated in December 2024, with a permit filed to address a Notice of Violation from January 2023, though this work is described as having no structural changes to the existing second and third floor residences. Historically, the building underwent reroofing work in 1998 and had some exterior tree-related issues with roots affecting the sewer line and uneven sidewalk squares, which were resolved in March 2016. The combination of recent active violations, including unauthorized units and potential health/safety concerns, represents the most significant current challenges faced by this property.

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

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Risk rating

How 786-788 17Th Ave'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
16th percentile

Out of 2250 buildings in this neighborhood, 1890 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
68%
No DBI
violation
32%
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.

DBI tenant complaints (past 7 years)

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

Neighborhood location

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

NOV rate, owner's portfolio

Per-building NOV rate across everything this owner manages — high rates signal pattern neglect.

12-Month severity forecast
No violation 31.6%
Moderate concern 54.6%
Severe concern 13.8%
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

786-788 17Th Ave event timeline

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

2025
Building Permit Nov 26
Legalize udu at (e) garage rear via state adu program. no structural work is planned under this scope of work.
$40,000 · Approved

See all 11 events

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

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Every record we have

Full data for 786-788 17Th Ave 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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