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1319-1325 Mason St

Nob Hill, SF 94133 0181005A 12 units · 4 fl · 1927

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 Nob Hill
Above average
avg 2.4
19
FewerMore

This building has 19 novs (7y), above the Nob Hill average of 2.4.

Rent & eviction protection

Is 1319-1325 Mason 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 1927
2 or more units
12 units
Property type
Multi-Family Residential
Zoning
RC3
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
Units12
Floors4
Year built1927
Total area10,075 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0181005A
Ownership

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

Owner name
Yee Gene W Y & Flora H Trs
Mailing address
1357 Mason St San Francisco CA 94133
Last sale
000000

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.

1319 Mason St, San Francisco, CA 94133
1325 Mason St, San Francisco, CA 94133
1323 Mason St, San Francisco, CA 94133
Augrented Insights
Initial analysis

The 12-unit apartment building at 1319-1325 Mason Street in Nob Hill, owned by Gene W Y & Flora H Yee Trust, has been a four-story multi-family residential structure since its construction in 1927. The building is currently classified as a Tier 4 Non-Compliant property under the Mandatory Soft Story Retrofit Program, with violations issued in 2023 regarding non-completion of required seismic retrofitting work. Recent fire safety upgrades have been implemented, including a significant fire alarm system improvement completed in October 2023, costing over $30,000, which included the installation of manual pull stations, smoke detectors, and low-frequency audibles in the sleeping areas. The building has a documented history of fire safety concerns, with multiple fire violations and complaints over the years related to alarm systems, extinguisher maintenance, and sleeping area requirements, though most have been corrected or abated.

The property has undergone several major improvements and faced various building-related issues over the years. Significant past work includes a residential and commercial soft-story retrofit filed in 2018, reroofing in 2016 ($25,000 investment), and heating system replacement in 2011. The building has experienced recurring fire safety system issues, with six fire complaints related to alarm systems between 2014 and 2023, though these were generally addressed promptly. Multiple routine inspections have been conducted between 2000 and 2023, revealing various maintenance requirements including stair repairs, egress obstructions, and the need for compliance affidavits. A concerning pattern of housing quality issues was documented in a 2022 complaint regarding unit 102, noting problems with insects/rodents, mold, ceiling leaks, and broken appliances, though this was marked as not active. While many historical violations have been resolved, the building's current non-compliant status in the Soft Story program and periodic fire safety system issues suggest ongoing challenges with maintaining full regulatory compliance and building safety standards.

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

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Risk rating

How 1319-1325 Mason 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
5th percentile

Out of 1125 buildings in this neighborhood, 1069 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
16%
No DBI
violation
84%
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.

Number of units

The number of units affects how the model reads complaint and violation totals — more units means more potential sources.

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.

12-Month severity forecast
No violation 8.9%
Moderate concern 68.8%
Severe concern 22.3%
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

1319-1325 Mason St event timeline

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

2026
Building Violation (NOV) Mar 30 Serious
Building violation
Evidence of peeling/ flaking and cracked paint observed; repair loose/ damaged plaster and remove/ cover peeling or damaged paint in an app…
Building Violation (NOV)Mar 30
Building violation

See all 15 events

Full history back to 2022 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 1319-1325 Mason 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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