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Building and Landlord Data Analysis Report

1620 Mason St, San Francisco, CA 94133

2
Complaints
5
Fire Incidents
36
311 Calls
0
Permits

Risk Assessment

31
High Risk

This building is in the riskiest 10% of buildings in Presidio Heights with significant maintenance issues.

Our AI predicts there is a 31% chance of no major maintenance issues.
Augrented Insights Report

The 6-unit, 3-story multi-family residential building at 1620 Mason Street in North Beach, owned by Mah Alan, has a significant history of building and fire safety violations dating back to its construction in 1965. The building experienced a cluster of fire safety issues in both 2007 and 2017, with violations including problems with hazardous plumbing, fire alarm system maintenance, self-closing fire-rated doors, fire extinguisher maintenance, egress obstruction, and various fire safety compliance requirements.

More recent fire safety concerns have persisted, with violations recorded in 2023 regarding sleeping area requirements and multiple alarm system issues between 2020-2024, though most were promptly corrected. The building has undergone regular routine inspections by Housing Inspection Services from 1999 through 2017, revealing various compliance issues each time. A notable housing complaint about mold in bedrooms was filed and resolved in 2017.

Recent building maintenance and safety issues include a collapsed sidewalk reported in December 2023 and multiple street cleaning concerns in 2023, though these are exterior and not directly related to building habitability. The property has experienced recurring fire alarm system problems, with multiple violations for alarm system maintenance and testing requirements, though most were corrected promptly. The most recent fire violation from November 2023 regarding sleeping area requirements remains open, indicating ongoing regulatory compliance issues.

Last updated: January 17, 2025
This report is created with AI and based on the most recent 10 data items in each category. Full reports with 50+ data points are available to subscribers.

1620 Mason St Report Contents

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Building Overview

Renter Risk Rating

This building is in the riskiest 10% of buildings in North Beach.

Building Characteristics

Total units 6
Year built 1965
Total area 5286 sq ft
Floors 3
Tax Abatements None
Building Class A5 - Apartment 5 to 14 Units
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Key Building Statistics

2
Building Complaints
Number of complaints filed with the Department of Building Inspection in the last 7 years.
6
Code Violations
Building code violations issued by DBI in the last 7 years.
5
Fire Incidents
Total number of fire incidents reported at this building.
0
DBI Director Hearings
Number of Director's Hearings held by DBI in the last 7 years.
36
311 Calls
Number of 311 calls for this building.
0
Fire Injuries
Number of fire injuries reported by SFFD.
0
Building Permits
Number of building permits issued by DBI.

Map and Aerial View of 1620 Mason St

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Reviews of 1620 Mason St

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1620 Mason St Landlord Information

Ownership Data

Ownership data from the Secured Roll (property tax) provided by the SF Assessor-Recorder.

NameAddress
Mah Alan732 Union St San Francisco CA 94133

Landlord Portfolio

We cross-reference landlords' property tax registrations to find the other buildings they own or manage.

AddressUnitsCode ViolationsRisk Rating
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Landlord Court Records

From CA Court Service & DocketAlarm. Note: name matching only, verify parties are actually the owners by reviewing the case files!

Date FiledCase TitleCourtLink
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1620 Mason St Rent Control Status

Year Built
Built before 1979
Units
More than 1 unit
Rent Board Registration
Not applicable
Additional Info
N/A
Year BuiltUnitsRent Board RegistrationAdditional Info
Before 1979 >1 unit N/A N/A

Full Building Data for 1620 Mason St

311 Housing Complaints

The table below shows the 311 housing complaints received regarding the conditions at 1620 Mason St, as well as requests for service nearby.

OpenedCategoryResponsible AgencyRequest TypeRequest DetailsStatus
2025-07-26 16:31:20+00:00 Parking Enforcement MTA - Parking Enforcement Dispatchblocking_driveway_cite_towNone Closed
2025-06-11 12:15:13+00:00 Parking Enforcement MTA - Parking Enforcement Dispatchparking_on_sidewalkNone Closed
2025-03-31 11:42:07+00:00 Street and Sidewalk Cleaning Recology - Abandonedgarbage_and_debrisfurniture Closed
2025-01-25 13:31:25+00:00 Parking Enforcement MTA - Abandoned Vehicles Workabandoned_vehicleNone Closed
2024-12-05 13:16:05+00:00 Parking Enforcement MTA - Parking Enforcement Dispatchblocking_driveway_cite_towNone Closed
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DBI Complaints

Complaints received by the Department of Building Inspection.

Date FiledDate AbatedAssigned DivisionComplaint DescriptionStatusLink
2017-03-01 00:00:00+00:002017-06-19 00:00:00+00:00Housing Inspection ServicesRoutine inspection Not Active View on DBI
2017-02-27 00:00:00+00:002017-04-04 00:00:00+00:00Housing Inspection ServicesMold in the bedrooms Not Active View on DBI
2011-01-06 00:00:00+00:002011-01-06 00:00:00+00:00Housing Inspection ServicesRoutine inspection of common areas of subject property. Not Active View on DBI
2007-11-14 00:00:00+00:002007-12-17 00:00:00+00:00Housing Inspection ServicesRoutine Not Active View on DBI
2004-10-20 00:00:00+00:002005-02-04 00:00:00+00:00Housing Inspection ServicesRoutine inspection of the (common area) building sec.(303 a s.f.h.c.) Not Active View on DBI
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DBI Violations

Building code violations records.

Date FiledDate AbatedItemViolation DescriptionStatus
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Fire Violations

Fire code violations recorded by the San Francisco Fire Department.

Violation DateDisposition DateAddressViolation DescriptionStatus
2023-11-16T00:00:00.000Z1618 - 1632 Mason Stsleeping area requirements open
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Fire Incidents

Historical fire incident records for the property.

Incident DatePrimary SituationIgnition CauseCivilian Injuries
2023-11-15 00:00:00+00:00745 Alarm system activation, no fire - unintentionalNone0
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Building Permits

Permit records for 1620 Mason St.

Permit Creation DateEstimated CostDescriptionStatusPermit Number
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Electrical Permits

Electrical system permits for the building.

Application DateDescriptionStatusPermit Number
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Plumbing Permits

Plumbing system permits for the building.

Application DateDescriptionStatusPermit Number
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Planning Records

Planning records for the property.

DateProject AddressDescriptionApplicant
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Tenant Buyouts

Tenant buyout records for the property.

BlocklotAddressAgreement DateAmountTenants
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How 1620 Mason St Compares

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