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Building and Landlord Data Analysis Report

3487-3497 21st St, San Francisco, CA 94110

2
Complaints
0
Fire Incidents
33
311 Calls
0
Permits

Risk Assessment

28
High Risk

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

Our AI predicts there is a 28% chance of no major maintenance issues.
Augrented Insights Report

The three-story, six-unit multi-family residential building at 3487-3497 21st Street, owned by the Robert J Maron Living Trust, was constructed in 1909 in the Eureka Valley/Dolores Heights neighborhood. The building's recent history shows a significant cluster of safety compliance issues in December 2022, when multiple building violations were filed regarding fire safety equipment and documentation, including smoke/carbon monoxide detector compliance and fire extinguisher maintenance. These violations were all abated by January 27, 2023.

The building underwent several maintenance and infrastructure upgrades over the years, including reroofing in 1995, electrical work in 2003 (though this permit expired), and the removal of wireless antenna equipment in 2013-2015, when the property transitioned from hosting multiple antennas to retaining only one OTARD antenna. Historical records show routine apartment inspections in 2001 and 2007, with no significant issues reported during those times. The property has experienced several residential-related incidents, though none resulted in significant damage or injuries.

These include multiple false alarm activations, a carbon monoxide detector activation, and a water leak incident, all recorded by the fire department. The most recent activity around the property, as documented through 311 calls, primarily involves street and sidewalk maintenance issues, including reports of illegal postings, garbage and debris concerns, and some parking-related complaints. A notable complaint was filed in October 2022 regarding construction activity and related street blockage, though this was abated within a week. While the building has had its share of maintenance issues, most have been promptly addressed, and there are no currently active violations or complaints on record.

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.

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Building Overview

Renter Risk Rating

This building is in the riskiest 10% of buildings in Eureka Valley/Dolores Heights.

Building Characteristics

Total units 6
Year built 1909
Total area 6114 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.
4
Code Violations
Building code violations issued by DBI in the last 7 years.
0
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.
33
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.

Included Addresses

  • 3487 21st St, San Francisco CA 94110
  • 3493 21st St, San Francisco CA 94110
  • 3491 21st St, San Francisco CA 94110
  • 3489 21st St, San Francisco CA 94110
  • 3495 21st St, San Francisco CA 94110
  • 3497 21st St, San Francisco CA 94110

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3487-3497 21st St Landlord Information

Ownership Data

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

NameAddress
Robert J Maron Living Trust3043 Sheldon Dr Richmond CA 94803

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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3487-3497 21st 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 3487-3497 21st St

311 Housing Complaints

The table below shows the 311 housing complaints received regarding the conditions at 3487-3497 21st St, as well as requests for service nearby.

OpenedCategoryResponsible AgencyRequest TypeRequest DetailsStatus
2025-07-20 10:50:53+00:00 Graffiti Public PW - Street and Environmental Servicesnot_offensivepole Open
2025-07-15 13:15:46+00:00 Street and Sidewalk Cleaning PW - Street and Environmental Servicesgarbage_and_debrisother_loose_garbage_debris_yard_waste Closed
2025-07-13 20:12:47+00:00 Illegal Postings PW - Street and Environmental Servicesaffixed_improperlyNone Closed
2025-07-13 20:09:47+00:00 Illegal Postings PW - Street and Environmental Servicesaffixed_improperlyNone Closed
2025-06-15 13:00:10+00:00 Graffiti Public PUC - Water Graffitioffensivefire_hydrant Closed
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DBI Complaints

Complaints received by the Department of Building Inspection.

Date FiledDate AbatedAssigned DivisionComplaint DescriptionStatusLink
2022-12-15 00:00:00+00:002023-01-27 00:00:00+00:00Housing Inspection ServicesGeneral maintenance Not Active View on DBI
2022-10-11 00:00:00+00:002022-10-17 00:00:00+00:00Building Inspection DivisionCaller unsure of correct address, but stated it is across the street from 3487 21st street on the even# side. it is mark zuckerberg new home that has been under construction.caller is reporting illegal construction taking place on 21st at the home listed above. he is stating there is cranes and trucks blocking the street with no visible permits for this work. the are leaving construction equipment around and blocking peoples driveways. caller would like dpw aware since there is no permits for the work visible (311 sr 15930646) Not Active View on DBI
2007-04-10 00:00:00+00:002007-04-10 00:00:00+00:00Housing Inspection ServicesRoutines. Not Active View on DBI
2001-01-02 00:00:00+00:002001-01-02 00:00:00+00:00Housing Inspection ServicesRoutine apartment house inspection Not Active View on DBI
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DBI Violations

Building code violations records.

Date FiledDate AbatedItemViolation DescriptionStatus
2022-12-15T00:00:00.000Z submit smoke/carbon compliance affidavit (420.4, 907.2.11 & 3401.6.1 sfbc) a smoke & carbon monoxide alarm compliance affidavit is due for this property. install the required alarms and submit the required compliance affidavit to the housing inspector or the housing inspection division of the department of building inspection. a smoke/carbon compliance affidavit has been included in this mailing. building sectionnot active
2022-12-15T00:00:00.000Z inspectors comment it is the property owners responsibility to be present or direct his/her representative to attend the re-inspection as scheduled on this notice of violation for the purpose of providing entry to the inspector of those areas not accessed during the initial inspection as specified, and/or to provide access to all areas cited within this notice. if the property owner cannot attend the scheduled re-inspection (as specified on this notice) it is his/her responsibility to secure a different inspection date and time with the inspector, and provide all tenants with notification as required by california civil code section 1954 (san francisco housing code section 303(b), if any dwellings, apartment units or guest rooms are to be accessed during the re-inspection. important note: due to the violations noted, this property is defined as a nuisance per sec. 1001-d of the sfhc. please review the attached "notice of violation warnings" for information regarding failure to comply with this notice. building sectionnot active
2022-12-15T00:00:00.000Z recharge/date tag fire extinguisher type 2a 10bc or equivalent (905, 1001(m) hc) the fire extinguisher annual maintenance is overdue. recharge and retag all fire extinguishers. the travel distance to a fire extinguisher from any habitable space shall not exceed 75 feet. building sectionnot active
2022-12-15T00:00:00.000Z submit section 604 compliance affidavit (604 hc) a section 604 compliance affidavit is now due for this property. have an appropriately licensed professional inspect those exterior building components exposed to the elements to insure they are structurally sound. submit the completed affidavit to the housing inspector or the housing inspection division of the department of building inspection. a section 604 affidavit has been included in this mailing. building sectionnot active
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Fire Violations

Fire code violations recorded by the San Francisco Fire Department.

Violation DateDisposition DateAddressViolation DescriptionStatus
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Fire Incidents

Historical fire incident records for the property.

Incident DatePrimary SituationIgnition CauseCivilian Injuries
2024-07-01 00:00:00+00:00745 Alarm system activation, no fire - unintentionalNone0
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Building Permits

Permit records for 3487-3497 21st 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 3487-3497 21st St Compares

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Compare with buildings in Eureka Valley/Dolores Heights:
Showing buildings that are: within 0.5 miles , of similar age (±15 years), of similar size (±50% units)

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