Free SF apartment background check

545-547 26Th Ave

Central Richmond, SF 94121 1518008 2 units · 2 fl · 1923

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 Central Richmond
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 545-547 26Th 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 1923
2 or more units
2 units
Property type
Multi-Family Residential
Zoning
RM1
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 built1923
Total area4,904 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot1518008
Ownership

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

Owner name
Wang Calvinn S
Mailing address
547 26th Ave San Francisco CA 94121
Last sale
061419

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.

547 26th Ave, San Francisco, CA 94121
545 26th Ave, San Francisco, CA 94121
Augrented Insights
Initial analysis

The two-unit residential building at 545-547 26th Avenue in San Francisco's Central Richmond neighborhood is a 2-story flats and duplex structure built in 1923, currently owned by Wang Calvinn S. The property underwent significant renovations in 2011, including a substantial horizontal addition valued at $128,000 that added multiple rooms and bathrooms, followed by voluntary seismic upgrades costing $35,000 that included window and door modifications. The building's systems were comprehensively updated in late 2011, with complete rewiring, a 200-amp service upgrade, bathroom remodels, and installation of two new furnaces. More recently, the building has experienced several maintenance issues, particularly with its sewer system, with documented sewage backups in 2015, 2016, 2021, and a missing side sewer vent cover in 2023. There remains one active code enforcement complaint from 2012 regarding a potentially abandoned building status. Additional historical records show various service calls related to graffiti, noise, and illegal parking, though these do not indicate structural or safety concerns.

The building's permit history shows proper documentation of major improvements and systems upgrades, with no expired permits from the modernization period. Two minor building complaints were filed in 2012 - one regarding a neighboring property's staircase construction near a fire station and another about the building's vacant status - though the former was abated in 2014. The most recent building-related issues have primarily involved infrastructure maintenance, particularly the sewer system, which has required multiple repairs and service calls over the years. The property also experienced two detector activations with no fire or injuries recorded, and one public service assistance call, all indicating responsive management of safety systems.

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

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Risk rating

How 545-547 26Th 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

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
77th percentile

Out of 2250 buildings in this neighborhood, 518 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
88%
No DBI
violation
12%
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.

Construction spend, owner's portfolio

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

Estimated permit spend (past 7 years)

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

Building size

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

12-Month severity forecast
No violation 82.3%
Moderate concern 11.8%
Severe concern 5.9%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

545-547 26Th Ave apartment reviews

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The story over time

545-547 26Th Ave event timeline

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

2025
Building Permit Oct 28
Solar permit: installing 16 solar pv modules, 395 watts per module, total no. of rating 6.32 kw. mounted: roof, ballasted: y | roof-mount pv 6.32kw dc (4.64 kw ac, 5.70kw cec ac)
$24,390 · Complete

See all 7 events

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

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Every record we have

Full data for 545-547 26Th Ave 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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