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124 Lyon St

Haight Ashbury, SF 94117 1220024 5 units · 4 fl · 1890

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 Haight Ashbury
At or below average
avg 1.8
0
FewerMore

This building has 0 novs (7y), at or below the Haight Ashbury average of 1.8.

Rent & eviction protection

Is 124 Lyon 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 1890
2 or more units
5 units
Property type
Multi-Family Residential
Zoning
RH3
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
Units5
Floors4
Year built1890
Total area5,223 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1220024
Ownership

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

Owner name
Ong & Tan Family Trust
Mailing address
Kevin Y K Ong & Siew-choo T 124 Lyon St San Francisco CA 94117
Last sale
072210

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.

124 Lyon St, San Francisco, CA 94117
1387 Oak St, San Francisco, CA 94117
Augrented Insights
Initial analysis

The 5-unit, 4-story multi-family residential building at 124 Lyon Street in Haight Ashbury, owned by the Ong & Tan Family Trust, has undergone several significant changes since its construction in 1890. Most recently, in July 2023, substantial work began to create an ADU within the existing building envelope, followed by a complete rewiring of a 3-bedroom apartment scheduled for November 2024. The property has a complex history with group housing conversions, including a 2022 attempt to revert from group home use back to a two-unit building, and previous group housing approvals for 10 occupants in an RH-3 district. Several building safety issues were addressed between 2019 and 2011, including a fresh air inlet problem and a lapsed seismic upgrade permit that led to violation proceedings, though these were ultimately closed in 2014.

The building's infrastructure has received attention over the years, with electrical service upgrades including conversions to underground service in 2007 and 2004, and various structural improvements such as plywood shear walls installation in 2006. Historical records show earlier work including reroofing in 2000 and a horizontal addition in 1995. Recent 311 calls from January 2025 indicate ongoing neighborhood challenges, including reports of graffiti and encampments near the property, though these issues are external to the building itself. The property underwent a tenant buyout in September 2024, involving 4 tenants with a payment of $17,815. The building's systems have required various permits over the years, with some permits either cancelled or expired, though most major improvements have been successfully completed.

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

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Risk rating

How 124 Lyon 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
92th percentile

Out of 581 buildings in this neighborhood, 46 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
87%
No DBI
violation
13%
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.

Building size

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

Number of floors

Building height affects maintenance complexity and is one of the size signals the model uses.

12-Month severity forecast
No violation 76.4%
Moderate concern 16.6%
Severe concern 6.9%
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

124 Lyon St event timeline

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

2026
Electrical Permit Apr 20
Online electrical permit: category 4a: installation of fire warning and controlled devices of up to 2,500 ft². installing dedicated functions fire alarm system for the sprinkler monitoring..
Complete
311 RequestApr 12
Abandoned vehicle

See all 19 events

Full history back to 2022 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 124 Lyon St apartments

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

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