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1342-1346 Mason St

Nob Hill, SF 94133 0180043 7 units · 3 fl · 1910

This building has more problems than most buildings in this 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
At or below average
avg 2.4
1
FewerMore

This building has 1 novs (7y), at or below the Nob Hill average of 2.4.

Rent & eviction protection

Is 1342-1346 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 1910
2 or more units
7 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
Units7
Floors3
Year built1910
Total area4,908 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0180043
Ownership

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

Owner name
John M & Lily T Lee Revoc T
Mailing address
Lee John M & Lily T Ttees 750 La Playa St # 537 San Francisco CA 94121
Last sale
091619

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.

1346 Mason St, San Francisco, CA 94133
1342 Mason St, San Francisco, CA 94133
1344 Mason St, San Francisco, CA 94133
Augrented Insights
Initial analysis

The three-story, 7-unit apartment building at 1342-1346 Mason Street in Nob Hill, owned by John M & Lily T Lee Revoc T, has undergone significant recent improvements since 2021, including the addition of an eighth unit (ADU) on the ground floor, completed in 2023. Major recent works include the installation of a fire sprinkler system (April 2023, cost $30,970), structural alterations to improve ceiling height and safety features (April 2023), comprehensive unit renovations (bathroom and kitchen remodels, window replacements), and substantial electrical upgrades including a new fire alarm system and replacement of the 400-amp main service. The building has completed mandatory seismic improvements, achieving compliance with the soft-story retrofit program (Tier 3) in 2019-2020, which included concrete footings and plywood strengthening in the crawl space (2017, cost $80,500) and a soft-story retrofit (2019, cost $135,000).

The property has a history of various maintenance and compliance issues, particularly in the mid-2000s when multiple violations were recorded including security, fire safety, and structural concerns, though these were promptly addressed by April 2005. There were also several enforcement actions regarding unauthorized short-term rentals between 2014 and 2021, which were subsequently abated. Recent months have seen some noise complaints (October 2023) and crosswalk obstruction issues (December 2023), though these are not directly related to building condition. The building's infrastructure has seen significant upgrades including a complete electrical system overhaul (2022), new windows, and building system improvements, suggesting proactive maintenance by current ownership. All major building permits and violations from 2004 to present appear to have been addressed, with recent permits focusing primarily on modernization and safety improvements.

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

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Risk rating

How 1342-1346 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
25th percentile

Out of 1125 buildings in this neighborhood, 844 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
30%
No DBI
violation
70%
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.

DBI tenant complaints (past 7 years)

Formal complaints tenants filed with DBI about this building over 7 years.

Neighborhood location

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

12-Month severity forecast
No violation 37.1%
Moderate concern 41.3%
Severe concern 21.5%
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

1342-1346 Mason St event timeline

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

2025
Electrical Permit Dec 18
Wire in additional adu. studio unit with sub panel.
Issued
Plumbing PermitNov 17
Work category: 1p; this permit is to continue adu work began under permit # pp20230420552. one bathroom, 1 kitchen 1 laundry

See all 21 events

Full history back to 2020 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 1342-1346 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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