Free SF apartment background check

4211 26Th St

Noe Valley, SF 94131 6562037 2 units · 2 fl · 1913

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
Above average
avg 1.2
2
FewerMore

This building has 2 novs (7y), above the Noe Valley average of 1.2.

Rent & eviction protection

Is 4211 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 1913
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RH1
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 built1913
Total area1,725 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot6562037
Ownership

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

Owner name
Zhao Rui & Chi Haidong
Mailing address
4211 26th St San Francisco CA 94131
Last sale
022618

Landlord portfolio

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

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Augrented Insights
Initial analysis

This 2-unit multi-family residential building at 4211 26th Street in Noe Valley, owned by Zhao Rui & Chi Haidong, has undergone significant changes since its construction in 1913. A major redevelopment project commenced in January 2018, involving the demolition of the existing two-story single-family building (with an unauthorized dwelling unit) and the construction of a new three-story, one-basement, two-unit residential building with an accessory dwelling unit (ADU), valued at $1.5 million. Prior to this redevelopment, the property had a contentious history, particularly in 2017-2018, with multiple complaints regarding unauthorized modifications and short-term rental activities, including the installation of unpermitted wetbars, sinks, and gas lines, which were investigated in August and October 2017. These violations led to Notices of Violation for illegal short-term rentals, though these issues were eventually resolved with penalties paid and listings modified to reflect minimum 30-day stays.

The property underwent a substantial transformation with the approved demolition and new construction project, which includes plans for two parking spaces and two Class I bicycle spaces. Historical records from 1997 show a previous complaint regarding a window construction issue on the property line, though this was marked as not active. In recent months (between October 2024 and December 2024), there have been several municipal service calls related to waste management and parking issues, including concerns about garbage disposal and toter management, though most of these cases have been resolved or determined not to be violations. The owner previously conducted a tenant buyout in July 2016, compensating one tenant $6,000, prior to the major redevelopment project. The current construction project, led by developer Feng, Feifei of fISO ideas, Inc., is part of a comprehensive plan to modernize and upgrade the property's facilities while addressing past compliance issues.

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

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Risk rating

How 4211 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
46th percentile

Out of 1879 buildings in this neighborhood, 1015 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
74%
No DBI
violation
26%
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 age

Older buildings tend to have more maintenance challenges; SF's pre-1906 earthquake housing stock carries distinct risk.

Building permits, owner's portfolio

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

Construction spend, owner's portfolio

Estimated permit value across all of this owner's buildings.

12-Month severity forecast
No violation 82.1%
Moderate concern 13.2%
Severe concern 4.7%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

4211 26Th St apartment reviews

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The story over time

4211 26Th St event timeline

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

2026
Plumbing Permit May 19
Restore fire damaged bathroom with shower pan on 2/f. install new plumbing for all fixtures.
Issued
Electrical PermitMay 19
Repair fire damaged electrical components along property line. replace entry lights, bathroom on 2/f electrical, recessed ceiling lights. 20 lights, 20 switches, 20 receptacles, 1 fan. temporary power, and upgrade main service panel.

See all 8 events

Full history back to 2025 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 4211 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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