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3528-3530 23Rd St

Noe Valley, SF 94110 3634008 3 units · 2 fl · 1900

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 Noe Valley
At or below average
avg 1.2
0
FewerMore

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

Rent & eviction protection

Is 3528-3530 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 1900
2 or more units
3 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
Units3
Floors2
Year built1900
Total area3,634 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3634008
Ownership

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

Owner name
Blavin Jonathan H
Mailing address
3528 23rd St San Francisco CA 94110
Last sale
042516

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.

3530 23rd St, San Francisco, CA 94110
3528 23rd St, San Francisco, CA 94110
Augrented Insights
Initial analysis

The property at 3528-3530 23rd Street in Noe Valley is a 2-story multi-family residential building constructed in 1900, containing three units and owned by Jonathan H. Blavin. The building has undergone several significant improvements over the past two decades, with the most recent major work including a roof replacement in 2016 (cost: $8,800) and sewer lateral repairs in the walkway. In 2015, substantial renovations were completed including the addition of two bathrooms, installation of new kitchen features, lighting upgrades, and electrical system improvements including the replacement of knob and tube wiring throughout the house. Earlier improvements included a seismic upgrade in 2010 ($25,600) involving the installation of shear walls and related structural elements, and a comprehensive window replacement project in 2008 that replaced 20 windows with energy-efficient variants.

The building's maintenance history shows regular upkeep and modernization efforts, though there was one notable complaint in 2009 regarding paint scraping and dust control during construction work. The property has been subject to several routine inspections of common areas, with no ongoing violations recorded. Recent activity at the address has primarily involved external matters such as parking enforcement issues (2024) and several street cleaning requests between 2018 and 2021, which were all resolved. A planning record from 2011 indicates a proposal for a top addition to the structure, though there are no current active permits or applications on file for such work. The most recent maintenance patterns suggest regular upkeep of the property with no major structural concerns reported in recent years.

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

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Risk rating

How 3528-3530 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
30th percentile

Out of 1879 buildings in this neighborhood, 1315 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
65%
No DBI
violation
35%
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.

Neighborhood (ZIP code)

The ZIP code captures local housing market and enforcement patterns that affect all buildings in the area.

Neighborhood location

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

Property class: multi-family flat

2–4 unit flats (class F) are a common SF building type with their own maintenance and complaint patterns.

12-Month severity forecast
No violation 44.9%
Moderate concern 21.1%
Severe concern 34.0%
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

3528-3530 23Rd St event timeline

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

2025
Plumbing Permit Jul 23
Work category: 1p; house trap replacement/installation
Complete

See all 1 events

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

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Every record we have

Full data for 3528-3530 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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