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513 23Rd Ave

Central Richmond, SF 94121 1566003 2 units · 2 fl · 1921

Nothing on record for this building in the last seven years, and our model puts it at a low risk of maintenance problems over the next 12 months. No public enforcement record to go on. Walk the building, ask the current tenants how repairs get handled, and get any promises in writing.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Central Richmond — not a forecast
At or below average
avg 0.5
0
FewerMore

This building has 0 novs (7y), at or below the Central Richmond average of 0.5.

Rent & eviction protection

Is 513 23Rd Ave 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 1921
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.

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 1921
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
Units2
Floors2
Year built1921
Total area2,640 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot1566003
Ownership

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

Owner name
Mailing address
Woon Wah & Wai Fong Lam Tru 513 23Rd Ave San Francisco CA 94121
Last sale

Landlord portfolio

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

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Augrented Insights
Initial analysis

The Lam Family Trust owns this two-unit, two-story multi-family residential building located at 513 23rd Avenue in the Central Richmond neighborhood. This 1921 flats and duplex property has undergone several documented improvements over the past decade, including a mid-level bathroom remodel in 2016 valued at $10,000 which incorporated high-efficacy lighting, and a sewer replacement completed in 2014. The building has required two street space permits in recent years, one in 2018 and another in 2017, though the cost for these permits was minimal.

Recent history shows a significant pattern of parking enforcement issues in the immediate vicinity of the property, particularly between 2022 and 2024. There have been multiple documented cases of vehicles blocking driveways, with at least six citations issued between 2022 and early 2024, including notables from February 2023 and October 2022 where citations were successfully enforced. There have also been two incidents of parking violations on the sidewalk and one case of a vehicle blocking a driveway that required officer response but was ultimately documented as "unable to locate" the offending vehicle. The most recent parking enforcement issues occurred in October 2024, with citations issued for driveway blockages. While these parking-related incidents do not directly impact the building's structural integrity or safety, they indicate a persistent challenge with parking enforcement in the immediate area that potential residents should be aware of.

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

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Risk rating

How 513 23Rd Ave'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

Lower risk — safer than most nearby

DBI rarely finds violations here. Strong maintenance history and a clean complaint record.

Typical — about average for the neighborhood

Some past violations or complaints on record. Worth asking the landlord about any open issues before signing.

Higher risk — riskier than most nearby

Elevated violation and complaint history. DBI has found issues here before and is statistically likely to again.

Neighborhood percentile
35thpercentile

Out of 2250 buildings in this neighborhood, 1462 are predicted to be safer. The band is relative to this neighborhood, so a share of every neighborhood falls in each colour.

RiskiestSafest
Predicted 12-month outcome
82%
No DBI
violation
18%
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.

DBI complaint rate, owner's portfolio

Per-building complaint rate across the owner's portfolio.

Estimated permit spend (past 7 years)

Dollar value of permits pulled at this address — large recent spend can signal deferred-maintenance catch-up.

Neighborhood location

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

12-Month risk forecast
Low failure risk 18%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

513 23Rd Ave apartment reviews

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On the map

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The story over time

513 23Rd Ave event timeline

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

2026
311 Request Feb 01
Blocking driveway cite only
Parking Enforcement

See all 2 events

Full history back to 2023 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 513 23Rd Ave apartments

13 SF public datasets for this parcel — permits, violations, complaints, fire records, 311 calls, planning records, and buyouts.

Side by side

How 513 23Rd Ave compares to the neighborhood

This building against comparable properties in Central Richmond. Toggle filters to narrow the peer group.

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Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

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