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1446-1452 Mason St

Nob Hill, SF 94133 0159019 6 units · 3 fl · 1913

Nothing on record for this building in the last seven years. Our model still sees a moderate chance of maintenance problems in the next 12 months, from the owner's wider portfolio and the surrounding area rather than from anything recorded here. No public enforcement record to go on. Walk the building, ask the current tenants how repairs get handled, and get any promises in writing.

NOVs (7y) vs. neighborhood
Records already on file, against a typical building in Nob Hill — not a forecast
At or below average
avg 2.4
0
FewerMore

This building has 0 novs (7y), at or below the Nob Hill average of 2.4.

Rent & eviction protection

Is 1446-1452 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 1913
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.

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 1913
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
Units6
Floors3
Year built1913
Total area4,455 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0159019
Ownership

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

Mailing address
2088 Union St Ste 1 San Francisco CA 94123
Last sale
September 16, 1998

Landlord portfolio

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

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Multiple entrances & addresses

Included addresses

All street addresses sharing this blocklot that are covered by this report.

1452 Mason St, San Francisco, CA 94133
1446 Mason St, San Francisco, CA 94133
1448 Mason St, San Francisco, CA 94133
1450 Mason St, San Francisco, CA 94133
Augrented Insights
Initial analysis

The 6-unit, 3-story multi-family residential building at 1446-1452 Mason Street in Nob Hill, owned by Hung Tim Tse & Zheng Lilly, was constructed in 1913 and has had several notable events throughout its history. The building underwent routine housing inspections in 1999, 2001, 2004, 2007, and 2011, with violations recorded in 2001 and 2004 primarily related to fire safety issues, including problems with the fire escape system, gas utility shutoff requirements, and ventilation in the garbage room. A significant complaint was filed in 2006 regarding unauthorized demolition work at the back of the building, though this was resolved by 2012. In 2011, work was completed to resecure loose exterior trim in preparation for painting, costing $1,000.

The building has undergone consistent street space permit usage from 2017 through 2018, with multiple permits issued at minimal costs. More recently, from late 2024 through early 2025, there have been several calls to 311 regarding street-related issues near the building, including reports of illegal parking and debris on the street, with most cases being resolved through responses from city services. Fire safety systems received attention between 2006 and 2008, with a fire alarm systems complaint that was ultimately corrected. There have been three documented fire-related incidents near the building since 2006, though none involved civilian injuries or were related to building fires, and included instances of alarm system activation, a carbon monoxide detector check, and a service call. The building appears to have maintained compliance with housing and safety requirements following the resolutions of past violations and complaints.

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

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Risk rating

How 1446-1452 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
64thpercentile

Out of 1125 buildings in this neighborhood, 405 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
72%
No DBI
violation
28%
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 permits, owner's portfolio

Permits pulled across all of this owner's buildings over 7 years.

Neighborhood (ZIP code)

The ZIP code captures local housing market and enforcement patterns that affect all buildings in the area.

12-Month risk forecast
Moderate failure risk 28%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months. Model: full_hgb_balanced.
Apartment reviews

1446-1452 Mason St apartment reviews

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8 found
The story over time

1446-1452 Mason St event timeline

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

2025
311 Request Aug 14
Garbage and debris
other loose garbage debris yard waste
311 RequestFeb 16
Other illegal parking

See all 4 events

Full history back to 2024 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 1446-1452 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 1446-1452 Mason St compares to the neighborhood

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