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3520 23Rd St

Noe Valley, SF 94110 3634006 7 units · 2 fl · 1904

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 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 3520 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 1904
2 or more units
7 units
Property type
Multi-Family Residential
Zoning
RM1
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
Units7
Floors2
Year built1904
Total area4,587 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3634006
Ownership

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

Owner name
Colleen Cottrell Lawrence T
Mailing address
Colleen Cottrell Lawrence, 67 Oakridge Dr Daly City CA 94014
Last sale
000000

Landlord portfolio

Other SF properties this owner holds, with risk grades for each.

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Augrented Insights
Initial analysis

The historical multi-family residential building at 3520 23rd Street in Noe Valley, constructed in 1904, currently houses 7 units across 2 stories. The property owner, Colleen Cottrell Lawrence, has maintained the building through several significant upgrades, with the most recent being a complete fire alarm system overhaul in 2021, replacing an earlier system and complying with San Francisco's fire safety requirements. The building underwent a mandatory soft-story retrofit in 2015, demonstrating compliance with earthquake safety regulations. Historical maintenance records show attention to basic infrastructure needs, including a 2000 reroofing project and 1998 dryrot repairs.

The building has experienced several safety-related issues over the years, with the most recent cluster of concerns emerging in late 2022 involving fire escape maintenance and smoke/carbon monoxide detection compliance, though these violations were promptly addressed and abated by January 2023. Earlier issues from 2002 regarding kitchen ventilation and fire escape maintenance were similarly resolved within a month. The property has maintained an active response to various maintenance needs as demonstrated by multiple 311 calls for street cleaning, tree maintenance, and sewer issues between 2015-2024, though these external issues were not directly related to the building's condition. Three parking enforcement incidents occurred recently (in 2019 and 2024), indicating occasional parking-related challenges in the vicinity of the property.

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

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Risk rating

How 3520 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
7th percentile

Out of 1879 buildings in this neighborhood, 1747 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
41%
No DBI
violation
59%
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.

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.

12-Month severity forecast
No violation 26.3%
Moderate concern 34.0%
Severe concern 39.7%
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

3520 23Rd St event timeline

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

2026
Electrical Permit May 27
New 200 amps electrical panel
Complete
311 RequestMar 15
Damaged tree

See all 13 events

Full history back to 2020 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 3520 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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