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4238-4240 Irving St

Outer Sunset, SF 94122 1707057 2 units · 2 fl · 1978

This building has significantly more problems than most nearby buildings. A handful of unresolved issues. Worth a careful walk-through and pointed questions.

NOVs (7y) vs. neighborhood
Compared to a typical building in Outer Sunset
Above average
avg 1.8
26
FewerMore

This building has 26 novs (7y), above the Outer Sunset average of 1.8.

Rent & eviction protection

Is 4238-4240 Irving 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 1978
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 built1978
Total area2,823 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1707057
Ownership

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

Owner name
Kwong Yip Cheung & Susan Ch
Mailing address
Kwong Yip Cheung & Susan , 1422 28Th Ave San Francisco CA 94122
Last sale
000000

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.

4240 Irving St, San Francisco, CA 94122
4238 Irving St, San Francisco, CA 94122
Augrented Insights
Initial analysis

The property at 4238-4240 Irving Street is a two-unit, two-story multi-family residential building constructed in 1978, currently owned by Kwong Yip Cheung & Susan Ch. The building has experienced several significant maintenance and safety issues in recent years, with the most pressing concerns including recurring pest problems, water damage, and safety violations. Notable incidents include a rodent infestation reported in August 2024, potential gas explosion risk in February 2024 involving a washing machine near water heater and gas lines, and multiple plumbing issues including sewer leaks in January 2022. The building has a documented history of electrical and safety violations, particularly concerning common area lighting and emergency systems, with a significant complaint in January 2021 regarding unsecured entry points and turned-off stairwell lighting. Previous building improvements include window replacements in 2010 and 2015, bathroom fan replacements in 2014, and various electrical upgrades, though many of these improvements were made in response to violation notices.

The property has gone through several cycles of permit compliance and violations, with recent fire safety concerns being addressed in 2020 involving exit maintenance and combustible materials. A retaining wall and wooden fence repair was completed in 2021 following a violation notice. Multiple building complaints from 2019-2024 indicate ongoing maintenance challenges, including issues with heating systems, water damage, and electrical systems. The building's maintenance history reveals a pattern of reactive responses to violations rather than proactive maintenance, with recent complaints suggesting continuing concerns about building security, infrastructure, and basic systems functionality.

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

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Risk rating

How 4238-4240 Irving 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
14th percentile

Out of 632 buildings in this neighborhood, 544 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
44%
No DBI
violation
56%
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 tenant complaints (past 7 years)

Formal complaints tenants filed with DBI about this building over 7 years.

NOV rate, owner's portfolio

Per-building NOV rate across everything this owner manages — high rates signal pattern neglect.

Notices of Violation (past 7 years)

DBI issued Notices of Violation at this address over the last 7 years — a direct record of code enforcement activity.

12-Month severity forecast
No violation 11.3%
Moderate concern 30.7%
Severe concern 58.0%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
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The story over time

4238-4240 Irving St event timeline

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

2026
311 Request May 22
Blocking driveway cite tow
Parking Enforcement

See all 13 events

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

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Every record we have

Full data for 4238-4240 Irving St apartments

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

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