Free SF apartment background check

406 30Th St

Noe Valley, SF 94131 6639010 2 units · 2 fl · 1900

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 406 30Th 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 1900
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 built1900
Total area2,830 sq ft
Property typeMulti-Family Residential
Tax statusHome Owners
Blocklot6639010
Ownership

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

Owner name
Mannion E Gerard & Nancy C
Mailing address
406 30th St San Francisco CA 94131
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 406 30th Street in Noe Valley is a two-unit, two-story multi-family residential building constructed in 1900, currently owned by Gerard & Nancy C Mannion. The building has undergone several significant improvements over the past two decades, with the most recent major work being the 2019 window replacement project valued at $45,140, which involved installing 17 energy-efficient fibrex windows, with 8 being visible from the street. Prior to this, the building's infrastructure received attention with a sewer line repair completed in 2016, and a water heater replacement in the same year (though this permit expired). Other notable improvements include a wall heater installation in 2014, and historical records show earlier works such as reroofing in 1996, and significant restoration work on the front stairs and porch framing and finishes in 2005 (permit expired).

The property has experienced recurring issues with parking violations, particularly in 2022, with multiple reports of sidewalk parking between March and August of that year. Most of these incidents involved the same white BMW X5 (license plate 7GBP055), though some involved different vehicles and resulted in various enforcement outcomes including citations and officers being unable to locate the offending vehicles. While these parking issues are not directly related to the building's condition, they may affect resident convenience. The building's maintenance history, particularly in recent years, shows regular upkeep and upgrades, with no recorded safety hazards or concerning patterns in the available data.

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

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Risk rating

How 406 30Th 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
83th percentile

Out of 1879 buildings in this neighborhood, 319 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.

Neighborhood location

Precise location is a proxy for neighborhood-level risk — some SF blocks have systematically higher DBI activity.

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.

12-Month severity forecast
No violation 85.8%
Moderate concern 9.6%
Severe concern 4.6%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

406 30Th St apartment reviews

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The story over time

406 30Th St event timeline

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

2025
Plumbing Permit Dec 16
Work category: 8p; installation of a combi navia boiler for radiant heat and domestic waters plus 2 zones of radiant heat with the heat plates.
Complete
Plumbing PermitAug 01
1 kitchen remodel, new sink, dishwasher, ice maker and gas loop, 2 bathroom remodel, toilet sink and shower, 1 half bathroom, sink, toilet, 1 new plumbing for washer and dryer.

See all 5 events

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

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Every record we have

Full data for 406 30Th 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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