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3601-3623 23Rd St

Noe Valley, SF 94110 3647001 12 units · 3 fl · 1905

This building has far more open problems than almost any other in the neighborhood. Renters here report frequent, slow-to-fix problems. Get repair promises in writing and check the unit before signing.

NOVs (7y) vs. neighborhood
Compared to a typical building in Noe Valley
Above average
avg 1.2
4
FewerMore

This building has 4 novs (7y), above the Noe Valley average of 1.2.

Rent & eviction protection

Is 3601-3623 23Rd 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 1905
2 or more units
12 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
Units12
Floors3
Year built1905
Total area20,400 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3647001
Ownership

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

Owner name
Zanco Trust The
Mailing address
Vernice Zanco 3140 Geary Blvd San Francisco CA 94118
Last sale
121895

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.

3613 23rd St, San Francisco, CA 94110
3617 23rd St, San Francisco, CA 94110
3611 23rd St, San Francisco, CA 94110
3621 23rd St, San Francisco, CA 94110
3615 23rd St, San Francisco, CA 94110
3605 23rd St, San Francisco, CA 94110
3619 23rd St, San Francisco, CA 94110
3607 23rd St, San Francisco, CA 94110
3603 23rd St, San Francisco, CA 94110
3623 23rd St, San Francisco, CA 94110
3609 23rd St, San Francisco, CA 94110
3601 23rd St, San Francisco, CA 94110
Augrented Insights
Initial analysis

The three-story, 12-unit apartment building at 3601-3623 23rd Street in Noe Valley, owned by Zanco Trust The, has undergone significant improvements and faced several challenges since its construction in 1905. Most notably, the building completed mandatory seismic retrofitting as a Tier 3 soft-story structure in 2019, with all related work being certified as complete. Recent improvements include a comprehensive fire safety upgrade in 2022, featuring the installation of a new manual fire alarm system ($42,000) and electrical updates, including new sub-panels. The building has also received substantial unit improvements, with multiple unit renovations in 2022 including bathroom enlargements, kitchen remodels, and plumbing updates totaling over $100,000 in improvements.

The property has experienced some concerning incidents and violations over its history, particularly during 2010-2012 when there were multiple housing code violations related to fire safety equipment, lead paint concerns, and various building repairs that needed attention. More recent complaints from 2022 raised issues about lead paint safety during construction work, along with noise complaints during renovation periods. While these violations have been resolved, they indicate periods of maintenance and safety concerns. The building's maintenance history shows attention to structural and safety improvements, with records showing repair work on floor joists, stairs, and various building systems dating back to 2001. Three minor fire-related incidents were recorded, though none resulted in injuries or significant damage, and a recent inspection in April 2023 found no violations.

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

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Risk rating

How 3601-3623 23Rd 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
1th percentile

Out of 1879 buildings in this neighborhood, 1860 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
19%
No DBI
violation
81%
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 size

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

DBI tenant complaints (past 7 years)

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

Number of units

The number of units affects how the model reads complaint and violation totals — more units means more potential sources.

12-Month severity forecast
No violation 14.6%
Moderate concern 71.7%
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

3601-3623 23Rd St event timeline

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

2026
311 Request Jun 17
Parking on sidewalk
Parking Enforcement
311 RequestJun 17
Parking on sidewalk

See all 23 events

Full history back to 2019 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 3601-3623 23Rd 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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