Free SF apartment background check

550-560 Guerrero St

Mission Dolores, SF 94110 3578009 6 units · 3 fl · 1909

This building has far more open problems than almost any other in the neighborhood. Renters here report frequent, slow-to-fix problems. Get repair promises in writing and check the unit before signing.

NOVs (7y) vs. neighborhood
Compared to a typical building in Mission Dolores
Above average
avg 2.9
35
FewerMore

This building has 35 novs (7y), above the Mission Dolores average of 2.9.

Rent & eviction protection

Is 550-560 Guerrero 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 1909
2 or more units
6 units
Property type
Multi-Family Residential
Zoning
RM2
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
Units6
Floors3
Year built1909
Total area10,710 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot3578009
Ownership

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

Owner name
John E Wai 1981 Living Trus
Mailing address
John We Wai, Trustee 1333 Jones St San Francisco CA 94109
Last sale
101597

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.

556 Guerrero St, San Francisco, CA 94110
558 Guerrero St, San Francisco, CA 94110
550 Guerrero St, San Francisco, CA 94110
560 Guerrero St, San Francisco, CA 94110
554 Guerrero St, San Francisco, CA 94110
552 Guerrero St, San Francisco, CA 94110
Augrented Insights
Initial analysis

The 6-unit multi-family residential building at 550-560 Guerrero Street, constructed in 1909, has undergone several significant renovations and faced various maintenance challenges over recent years. Most notably, the building completed a mandatory soft-story retrofit in 2017 (Tier 3) at a cost of $90,000, demonstrating compliance with seismic safety requirements. Recent improvements include multiple ongoing renovations in 2024, involving kitchen and bathroom remodeling on the second floor ($45,000) and corresponding electrical/plumbing upgrades, as well as water heater replacements and minor fire safety corrections ($1,700).

The building has experienced several maintenance issues over the past few years, with the most recent problems documented in 2023-2024 involving hot water outages, water damage, and an electrical inspection citing hazardous wiring conditions. Historical records from 2019 indicated concerns with combustible materials and rodent infestation linked to construction debris, while a 2023 complaint suggests possible unauthorized rooming/boarding house operation. The property has maintained compliance with fire safety inspections, with no significant fire-related injuries recorded in recent incidents, though there have been occasional smoke detector activations and gas leak calls. While most recent work demonstrates active maintenance and improvements, the building's history shows periodic infrastructure challenges, particularly relating to plumbing and electrical systems, as evidenced by multiple complaints and permits for repairs or replacements. The property has also experienced recurring issues with garbage and debris management, as documented in numerous 311 calls throughout 2024.

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

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Risk rating

How 550-560 Guerrero 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
2th percentile

Out of 799 buildings in this neighborhood, 783 are predicted to be safer.

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

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.

12-Month severity forecast
No violation 7.9%
Moderate concern 79.9%
Severe concern 12.1%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

550-560 Guerrero St apartment reviews

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The story over time

550-560 Guerrero St event timeline

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

2026
311 Request Jun 15
Permit parking
defaced ok
311 RequestJun 10
Garbage and debris

See all 22 events

Full history back to 2019 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 550-560 Guerrero 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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