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Building and Landlord Data Analysis Report

183 21st Ave, San Francisco, CA 94121

2
Complaints
0
Fire Incidents
4
311 Calls
0
Permits

Risk Assessment

33
High Risk

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

Our AI predicts there is a 33% chance of no major maintenance issues.
Augrented Insights Report

The property at 183 21st Avenue is a two-unit, two-story multi-family residential building constructed in 1914 and currently owned by the Tam Family Trust. The building has experienced significant maintenance and safety issues in recent years, with multiple complaints and violations emerging throughout 2024. Most notably, in March 2024, multiple violations were recorded regarding heating systems, water heaters, electrical systems, windows, and safety concerns, all of which were addressed through a series of permits and repairs completed between February and May 2024.

This included work on the fireplace, deck, bathroom ventilation, concrete, and window repairs, as well as the installation of new carbon monoxide and smoke detectors. The building underwent substantial plumbing and electrical upgrades in 2024, including the installation of two new water heaters, a heat pump system, and repairs to the sewer pipe due to tree root intrusion. Historical records show past issues with deck repairs in 2011 and complaints about unpermitted construction and noise in 2021, though these were resolved. The recent inspection history reveals multiple safety and maintenance concerns, including an unpermitted water heater installation in March 2024 with several safety hazards noted, and electrical work completed without proper permits.

Prior to these recent repairs, residents reported various issues including non-functioning lights, cracked windows, bathroom problems, and inadequate ventilation. The building's maintenance history shows active response to violations, with most recent complaints officially abated by May 2024, though some related complaints appear to still be in the resolution process. The property's planning records indicate permitted repairs to front windows, while historical 311 calls related to waste management were recorded in 2019-2020. The Tam Family Trust has demonstrated compliance with recent building codes through multiple permits and repairs addressing both current violations and deferred maintenance 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.

183 21st Ave Report Contents

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Building Overview

Renter Risk Rating

This building is in the riskiest 10% of buildings in Lake Street.

Building Characteristics

Total units 2
Year built 1914
Total area 2244 sq ft
Floors 2
Tax Abatements None
Building Class F - Flats & Duplex
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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.
0
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.
4
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.

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183 21st Ave Landlord Information

Ownership Data

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

NameAddress
Tam Family TrustTam Sammy C H & Lily Y Y Tr 1926 44Th Ave San Francisco CA 94116

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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183 21st Ave 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 183 21st Ave

311 Housing Complaints

The table below shows the 311 housing complaints received regarding the conditions at 183 21st Ave, as well as requests for service nearby.

OpenedCategoryResponsible AgencyRequest TypeRequest DetailsStatus
2022-02-10 14:12:00+00:00 Abandoned Vehicle DPT Abandoned Vehicles Work QueueAbandoned VehiclesDPT Abandoned Vehicles Low Closed
2021-03-01 15:29:18+00:00 Noise Report DBI Inspection Services Queueconstruction_private_propertyNoise Report - construction_private_property Closed
2020-06-18 09:32:00+00:00 Litter Receptacles DPW Ops QueueToters_left_out_24x7None Closed
2019-12-07 22:42:00+00:00 Litter Receptacles DPW Ops QueueToters_left_out_24x7None Closed
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DBI Complaints

Complaints received by the Department of Building Inspection.

Date FiledDate AbatedAssigned DivisionComplaint DescriptionStatusLink
2025-07-10 00:00:00+00:00NoneHousing Inspection ServicesDate last observed: 20-jun-25; time last observed: current; floor: 1st floor; unit: 185 21st a; exact location: main bldg; building type: residence/dwelling hazardous outlet wiring; stairway safety; plumbing leak; hazardous appliance; ; additional information: i live at 183-185 21st ave - the bottom unit is mine, street address is 185 - the top unit is 183. i¿m filing a complaint because the landlord won¿t fix a lot of things - and getting a dbi nov issued is the only way he acts. here are just some examples: toilet leaking onto floor, possible damaged wax ring; windows with broken sashes, won¿t stay open; badly cracked sidewalk in back, trip hazard; kitchen stove not secured to ground; damaged and mildewed walls in bedrooms and bathroom; bad electrical, ceiling light ¿pops¿ when switched on, which burns out the bulb; bad electrical, some outlets not properly grounded, no cfci outlet in kitchen by sink; back door, no weatherproofing, rain gets in on the bottom, and Active View on DBI
2024-03-26 00:00:00+00:002024-05-30 00:00:00+00:00Plumbing Inspection DivisionDate last observed: 26-mar-24; unit: 185; exact location: main bldg; building type: residence/dwelling water heater installed w/o permit; ; additional information: ¿ the appliance vent is improperly installed. the vent connector is not properly sloped. the vent is installed with inadequate clearances to wood/combustible materials. ¿ the temperature pressure relief (tpr) valve does not have a drain pipe installed. this may result in water damage should the valve trip/leak. ¿ the drain should terminate at the exterior or other approved location. ¿ the temperature pressure relief (tpr) valve is terminated too far above grade. this may result in scalding burns should the valve trip. this is a significant safety hazard. ¿ the water heater is not properly strapped to resist earthquake movement. this is a safety hazard. ¿ the appliance gas supply connection does not have the required sediment trap installed at the unit. ¿ the flexible gas connection is old and has been Not Active View on DBI
2024-03-20 00:00:00+00:00NoneElectrical Inspection DivisionDate last observed: 19-mar-24; exact location: main bldg; building type: residence/dwelling electrical work previously installed w/o permit; ; additional information: living room ceiling fan, fireplace heater, rear bath area (fan, lights, receptacles), and the laundry area (220 vac dryer circuit) all appear to be non-original installations. no permit for electrical work on record for 183 21st ave.; Not Active View on DBI
2024-03-18 00:00:00+00:002024-05-15 00:00:00+00:00Housing Inspection ServicesDate last observed: 15-mar-24; unit: 185; exact location: main bldg; building type: residence/dwelling no heat; stairway safety; dilapidated structure; ; additional information: front outside light doesn't work, living room window cracked, front bedroom window with broken sash, bathroom cabinet falling apart, floor peeling up in bathroom, no vent in bathroom with bathtub; Not Active View on DBI
2024-01-16 00:00:00+00:002024-05-31 00:00:00+00:00Housing Inspection ServicesDeferred maintenance Not Active View on DBI
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DBI Violations

Building code violations records.

Date FiledDate AbatedItemViolation DescriptionStatus
2024-03-18T00:00:00.000Z provide manual release at sleeping room security grates or remove to provide emergency egress to at least one window (706b (7)(i)) at rear bedroom, security grates were ziptied shut. provide manual release as required. building sectionnot active
2024-03-18T00:00:00.000Z this notice includes violations for the areas noted. this department investigated the complaint at unit 185 of the subject property and observed violation(s) of the san francisco housing code which are delineated within the notice of violation issued. pertinent observations are as follows. building sectionnot active
2024-03-18T00:00:00.000Z provide code compliant water heaters at water heater room (1001(b)(7),(8),&(g)hc) note: plumbing permit required, make sure that all permits have been signed off prior to contacting housing inspector for final inspection (103.1.1 pc) water heaters installed at utility room at rear of building not installed per code. obtain plumbing permit and re-install water heaters in approved manner. building sectionnot active
2024-03-18T00:00:00.000Z provide shutoff valve for gas at kitchen range (712 hc) at kitchen gas supply to range, shutoff valve stuck open, unable to close without difficulty. repair/replace valve as needed. building sectionnot active
2024-03-18T00:00:00.000Z repair window sash (1001(h) hc) at front bedroom, window sash broken / doesn't open completely. repair/replace as needed. 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
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Building Permits

Permit records for 183 21st Ave.

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
1381014185 21st AvenueNoneNoneNone
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How 183 21st Ave Compares

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