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1307-1311 Mason St

Nob Hill, SF 94133 0181007 3 units · 3 fl · 1910

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 Nob Hill
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 1307-1311 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
3 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
Units3
Floors3
Year built1910
Total area3,365 sq ft
Property typeMulti-Family Residential
Tax statusNone
Blocklot0181007
Ownership

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

Owner name
Silver Sandy Llc
Mailing address
809 Camelia St Berkeley CA 94710
Last sale
082621

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.

1307 Mason St, San Francisco, CA 94133
1311 Mason St, San Francisco, CA 94133
Augrented Insights
Initial analysis

The three-story multi-family residential building at 1307-1311 Mason Street in Nob Hill, owned by Silver Sandy LLC, has undergone significant improvements and maintenance since its construction in 1910. The property has seen substantial recent upgrades, including a major interior remodel of the commercial space in 2022 valued at $175,000 that incorporated ADA-compliant features, followed by foundation revisions in 2023. Comprehensive utility upgrades were completed in 2021, featuring a 400-amp electrical service upgrade with three meters, rewiring of the commercial space, and the installation of a tankless water heater. Additional plumbing improvements included new drains, traps, and ground floor plumbing for ADA-compliant facilities in 2023, along with the installation of a heat pump system later that year.

The building's maintenance history shows regular upkeep, including reroofing projects in 1989 and 2018, window replacements in 2021, and various kitchen and bathroom remodels. Street-level improvements have been made to comply with current standards, including PG&E meter accessibility modifications. While there have been some infrastructure-related incidents, such as a water main issue in 2021 and a collapsed sidewalk report in 2019, these were promptly addressed. The property has maintained proper regulatory compliance, with no outstanding planning code complaints or building violations on record. Recent 311 calls primarily relate to external issues such as street lighting and waste management, which are municipal responsibilities rather than building-specific concerns.

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

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Risk rating

How 1307-1311 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
97th percentile

Out of 1125 buildings in this neighborhood, 34 are predicted to be safer.

RiskiestSafest
Predicted 12-month outcome
92%
No DBI
violation
8%
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.

Building age

Older buildings tend to have more maintenance challenges; SF's pre-1906 earthquake housing stock carries distinct risk.

Notices of Violation, owner's portfolio

DBI NOVs across all buildings this owner is registered on — a signal of systemic maintenance issues across the portfolio.

Final warnings, owner's portfolio

Final warnings issued across all buildings this owner is registered on.

12-Month severity forecast
No violation 81.0%
Moderate concern 15.4%
Severe concern 3.6%
Estimated probability of receiving a DBI Notice of Violation in the next 12 months at each severity level. Model: full_hgb_balanced.
Apartment reviews

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The story over time

1307-1311 Mason St event timeline

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

2026
311 Request May 05
Garbage and debris
human waste or urine

See all 15 events

Full history back to 2021 — violations, complaints, permits, buyouts, and fire incidents.

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Every record we have

Full data for 1307-1311 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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