Free SF apartment background check

4475 23Rd St

Noe Valley, SF 94114 2807039 12 units · 3 fl · 1956

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
5
FewerMore

This building has 5 novs (7y), above the Noe Valley average of 1.2.

Rent & eviction protection

Is 4475 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 1956
2 or more units
12 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.

Statewide backstop · AB 1482

California Tenant Protection Act of 2019

Even when a building isn't covered by local rent stabilization, the statewide Tenant Protection Act (AB 1482) may still apply. It caps annual rent increases and requires the landlord to state a legal reason to end most tenancies.

15+ years since occupancy
Built 1956
Annual rent increase cap
5% + CPI, max 10%
Just-cause eviction
After 12 months
Local rent control likely takes priority. This building appears to fall under the local ordinance above, which is stronger than AB 1482. Where a local just-cause ordinance applies, its rules govern instead of the state cap.

AB 1482 does not apply to single-family homes and condos unless owned by a corporation, REIT, or an LLC with a corporate member; to owner-occupied duplexes; or to deed-restricted affordable housing. The Act is in effect until January 1, 2030. Not legal advice — see the California landlord–tenant guide.

Building characteristics
Units12
Floors3
Year built1956
Total area7,725 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot2807039
Ownership

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

Owner name
Mailing address
268 Bush St # 1688 San Francisco CA 94104
Last sale
080221

Landlord portfolio

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

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Augrented Insights
Initial analysis

The 12-unit apartment building at 4475 23rd Street in Noe Valley, constructed in 1956, has undergone significant rehabilitation work over the past four years, focusing primarily on unit upgrades including kitchens, bathrooms, and laundry facilities. Between 2020 and 2023, eight units (2, 4, 5, 6, 10, 11, and 12) received comprehensive renovations costing between $28,000 and $50,000 each, including the installation of new appliances and full bathroom/kitchen remodels. The building has also seen substantial infrastructure improvements, including a $40,000 fire alarm system upgrade in 2020 to comply with current safety codes, and the installation of a new water heating system in 2022.

The property has experienced several notable issues that have been addressed over time. In 2019, there was a complaint regarding mold in one of the units, which was documented and subsequently resolved. Multiple building code compliance violations were filed in 2019, including concerns about garbage bin placement and various safety requirements, though these were all abated by August 2019. More recently, in early 2023, common area issues were reported and resolved by August 2023. The building's fire safety record shows regular alarm system inspections and occasional violations between 2014 and 2023, with all issues being corrected promptly. While there was one gas leak incident recorded by the fire department, it was resolved without injuries or significant impact. The property has maintained an active maintenance schedule, with regular updates to units and systems, though there have been recurring issues with toter placement in 2023 as noted in 311 calls.

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

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Risk rating

How 4475 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.

Building size

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

Number of units

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

Building permits (past 7 years)

Number of permits pulled at this address — construction or renovation activity over 7 years.

12-Month severity forecast
No violation 27.4%
Moderate concern 63.5%
Severe concern 9.1%
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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On the map

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The story over time

4475 23Rd St event timeline

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

2026
Plumbing Permit Jan 20
Unit 7- kitchen and bathroom remodel . no shower pan or underground work
Complete
Electrical PermitJan 20
Unit 7- kitchen and bathroom remodel to include upgrade subpanel

See all 29 events

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

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Every record we have

Full data for 4475 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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