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3731-3733 23Rd St

Noe Valley, SF 94114 3649032A 2 units · 2 fl · 1924

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 3731-3733 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 1924
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 built1924
Total area2,944 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot3649032A
Ownership

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

Owner name
Joan Wasielewski Lvg Trust
Mailing address
Joan Wasielewski 3733 23Rd St San Francisco CA 94114
Last sale
102116

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.

3731 23rd St, San Francisco, CA 94114
3733 23rd St, San Francisco, CA 94114
Augrented Insights
Initial analysis

The two-unit residential building at 3731-3733 23rd Street in Noe Valley, constructed in 1924 and currently owned by the Joan Wasielewski Living Trust, has undergone significant recent renovations and compliance work. In 2024, the property completed several substantial improvements, including a kitchen and bathroom remodel at $50,000, boiler replacement, and compliance with a physical inspection report (CC-8574) addressing various maintenance and safety requirements. These compliance measures included electrical system updates such as bonding and grounding restorations, plumbing upgrades including backwater valves and independent shut-offs, and sheetrock installation in the garage area. A more serious issue was addressed in 2018 when the building had a fire-safety violation related to fire proofing between the garage and habitable spaces, which was resolved by January 2019.

The building has maintained regular upkeep over the years, including a complete roof replacement in 2021 costing $24,000, and historical records show the installation of a new combined heating and domestic hot water boiler in 2012. A tenant buyout occurred in September 2019 involving one tenant for $91,000. Recent 311 calls related to the property have primarily concerned street-level issues such as abandoned vehicles and pavement defects, rather than building-specific problems. The property has gone through proper channels for major modifications, though there was one instance in 2022 of attempted window modifications that was withdrawn after city planning determined the front windows were original and no changes were proposed.

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

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Risk rating

How 3731-3733 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
93th percentile

Out of 1879 buildings in this neighborhood, 132 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
92%
No DBI
violation
8%
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 location

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

Building age

Older buildings tend to have more maintenance challenges; SF's pre-1906 earthquake housing stock carries distinct risk.

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 93.3%
Moderate concern 5.3%
Severe concern 1.4%
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

3731-3733 23Rd St event timeline

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

2026
Building Permit May 18
Partial sheet rock patch & repair in four rooms (living room, 2bd, office). approx 500 sq ft on drywall r/r.
$5,000 · Complete
DBI ComplaintMay 08
Removal of the ceilings was performed with out permits. they removed and replace the ceilings in the following rooms: living rooms, bedroom, back room (sun room), possibly the second bedroom. they removed the ceilings which were a part of the fire resistance assembly.

See all 19 events

Full history back to 2024 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 3731-3733 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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