Free SF apartment background check

4178 26Th St

Noe Valley, SF 94131 6554017 2 units · 2 fl · 1988

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 4178 26Th 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 1988
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RH2
Not rent-controlled. Buildings constructed after 1978 are generally exempt from SF rent increase limits under the Costa-Hawkins Act.

Based on SF Assessor records. Not legal advice — confirm with the SF Rent Board.

Building characteristics
Units2
Floors2
Year built1988
Total area3,886 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot6554017
Ownership

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

Owner name
Osullivan/Ryan Fmly Tr
Mailing address
Osullivan John G & Ryan Joa 2625 23Rd Ave San Francisco CA 94116
Last sale
000000

Landlord portfolio

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

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Augrented Insights
Initial analysis

The property at 4178 26th Street in Noe Valley is a two-unit residential building constructed in 1988, currently owned by the Osullivan/Ryan Family Trust. The building has undergone several significant maintenance updates in recent years, including a complete reroofing project completed in June 2024 at a cost of $15,400, and simultaneous electrical upgrades in October 2024 involving panel replacements in both units (#4176 and #4178). In 2020, both units received furnace replacements, demonstrating regular infrastructure maintenance by the owners. The building's history shows proper redevelopment, as it was constructed following the demolition of a single-family dwelling in October 1986.

The property has experienced some recurring maintenance issues in the surrounding infrastructure, particularly concerning the public sidewalks and streets. There have been multiple reports of sidewalk defects, with cases from July 2019 and October 2018 regarding a collapsed sidewalk still showing as open cases. Street maintenance has been documented through 311 calls in February 2024 (regarding a damaged tree) and various parking enforcement calls, including two cases of driveway blocking in September 2024. Historical records show earlier concerns like graffiti (2013) and various pavement defects (2016 and 2020), though these appear to have been resolved. The building's recent maintenance history suggests attentive management, with major systems such as roofing, electrical, and heating being regularly updated or replaced when necessary.

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

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Risk rating

How 4178 26Th 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
47th percentile

Out of 1879 buildings in this neighborhood, 996 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
75%
No DBI
violation
25%
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.

Estimated permit spend (past 7 years)

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

Building permits, owner's portfolio

Permits pulled across all of this owner's buildings over 7 years.

12-Month severity forecast
No violation 82.3%
Moderate concern 10.6%
Severe concern 7.1%
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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The story over time

4178 26Th St event timeline

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

2024
Electrical Permit Oct 18
Replace and upgrade panel in lower unit #4176 - 4 bed 3 bath
Complete
Electrical PermitOct 18
Replace and upgrade sub panel in upper unit #4178 - 3 bed two bath

See all 5 events

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

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Every record we have

Full data for 4178 26Th 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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