Free SF apartment background check

1319-1325 Mason St

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

This building has a substantial enforcement record over the last seven years, and our model predicts continuing maintenance failures over the next 12 months. Read the records below before you sign. Ask which issues were resolved, get repair commitments in writing, and inspect the unit yourself.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Nob Hill — not a forecast
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.

Statewide backstop · AB 1482

California Tenant Protection Act of 2019

Even when a building isn't covered by local rent stabilization, the statewide Tenant Protection Act (AB 1482) may still apply. It caps annual rent increases and requires the landlord to state a legal reason to end most tenancies.

15+ years since occupancy
Built 1927
Annual rent increase cap
5% + CPI, max 10%
Just-cause eviction
After 12 months
Local rent control likely takes priority. This building appears to fall under the local ordinance above, which is stronger than AB 1482. Where a local just-cause ordinance applies, its rules govern instead of the state cap.

AB 1482 does not apply to single-family homes and condos unless owned by a corporation, REIT, or an LLC with a corporate member; to owner-occupied duplexes; or to deed-restricted affordable housing. The Act is in effect until January 1, 2030. Not legal advice — see the California landlord–tenant guide.

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).

Mailing address
1357 Mason St San Francisco CA 94133
Last sale

Landlord portfolio

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

Unlock complete report
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

Free account unlocks the full analysis — plus 2× more records across all data categories and the complete landlord portfolio.
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

Lower risk — safer than most nearby

DBI rarely finds violations here. Strong maintenance history and a clean complaint record.

Typical — about average for the neighborhood

Some past violations or complaints on record. Worth asking the landlord about any open issues before signing.

Higher risk — riskier than most nearby

Elevated violation and complaint history. DBI has found issues here before and is statistically likely to again.

Neighborhood percentile
5thpercentile

Out of 1125 buildings in this neighborhood, 1069 are predicted to be safer. The band is relative to this neighborhood, so a share of every neighborhood falls in each colour.

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 risk forecast
High failure risk 84%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

1319-1325 Mason St apartment reviews

Real experiences from people who have lived here. Share yours to help other renters decide.

Share your experience — Help other renters by leaving an honest apartment review

Loading reviews…

On the map

Compare nearby alternatives

This building and nearby alternatives, color-coded by risk level. Click any marker to explore.

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.

Unlock complete timeline
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.

Side by side

How 1319-1325 Mason St compares to the neighborhood

This building against comparable properties in Nob Hill. Toggle filters to narrow the peer group.

Loading comparables…
Still apartment hunting in SF?

Look up the next apartment before you sign

Search any SF address free — no account needed to see the risk rating.

Simple pricing

Get the complete picture

Every plan unlocks the complete report: all 13 SF datasets, full history, landlord portfolio, and PDF & Excel exports.

Pay once

Report Bundle

For the buildings you're deciding on right now

$10one time

3premium reports

$3.33 per report · charged once, never renews

Each credit unlocks one building's premium report for 30 days.

  • 3 premium reports — AI executive summary included
  • Live data across all 27 public record types
  • 200 records per dataset
  • PDF & Excel exports included
  • Compare up to 10 buildings side-by-side
  • Credits never expire until you use them
Pay once

Apartment Hunter

For a wide search across many buildings

$39one time

30premium reports

$1.30 per report · charged once, never renews

Each credit unlocks one building's premium report for 30 days.

  • 30 premium reports — AI executive summary included
  • Live data across all 27 public record types
  • 200 records per dataset
  • PDF & Excel exports included
  • Compare up to 10 buildings side-by-side
  • Credits never expire until you use them

Cancel anytime · Data sourced from SF Open Data, DBI, SFFD, SF Rent Board & Planning

Watch 1319-1325 Mason St
Get alerted the moment a new violation or complaint is filed.