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101-105 18Th Ave

Lake Street, SF 94121 1378001 9 units · 3 fl · 1915

This building has far more open problems than almost any other in the neighborhood. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood
Compared to a typical building in Lake Street
At or below average
avg 0.6
0
FewerMore

This building has 0 novs (7y), at or below the Lake Street average of 0.6.

Rent & eviction protection

Is 101-105 18Th 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 1915
2 or more units
9 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
Units9
Floors3
Year built1915
Total area7,980 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1378001
Ownership

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

Owner name
George K & Nancy N Chen Fml
Mailing address
Chen Nancy N Ttee 972 Greenwich St San Francisco CA 94133
Last sale
020596

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.

105 18th Ave, San Francisco, CA 94121
101 18th Ave, San Francisco, CA 94121
Augrented Insights
Initial analysis

The 9-unit, 3-story multi-family residential building at 101-105 18th Avenue in the Lake-The Presidio neighborhood, owned by George K & Nancy N Chen Family, has undergone several significant upgrades and faced some notable challenges since its construction in 1915. Most importantly, the building completed a mandatory soft-story retrofit in 2016 at a cost of $50,000, bringing it into compliance with seismic safety requirements as a Tier 3 building. In 2019, the building received two fire code violations related to its alarm system and owner contact posting requirements, both of which were subsequently abated. The building experienced a serious incident in December 2015 when a brick chimney from the neighboring building (1711 Lake Street) collapsed onto this property, damaging an exterior wall and window; repairs completed in 2015 included this incident's remediation as well as sewer line replacement and plumbing updates.

Historical maintenance and improvement work includes window replacements on the 18th Avenue and south sides in 1999, stucco renovation in 1998, and reroofing in 1996, though the latter two permits are listed as expired. The building faced multiple fire safety violations in 2002, which were all abated by December 2002, including issues with egress obstruction, smoke enclosure doors, fire escape maintenance, and combustible storage. More recent inspections in 2008, 2017, and 2019 have been resolved without any noted ongoing concerns. The property has generated several recent municipal service calls in 2024, primarily related to parking issues and street maintenance, while three fire complaints related to street numbering and alarm systems were recorded between 2017-2019, though two were found to have no merit and the third was addressed. The building's most recent fire incident records show three responses between 2017-2019, none of which resulted in civilian injuries.

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

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Risk rating

How 101-105 18Th 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
2th percentile

Out of 660 buildings in this neighborhood, 647 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
30%
No DBI
violation
70%
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.

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 26.1%
Moderate concern 53.7%
Severe concern 20.1%
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

101-105 18Th Ave event timeline

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

2026
311 Request Apr 17
Blocking driveway cite tow
Parking Enforcement
311 RequestJan 02
Blocking driveway cite only

See all 5 events

Full history back to 2025 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 101-105 18Th 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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