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Building and Landlord Data Analysis Report

3440 20th St, San Francisco, CA 94110

10
Complaints
0
Fire Incidents
326
311 Calls
12
Permits

Risk Assessment

21
High Risk

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

Our AI predicts there is a 21% chance of no major maintenance issues.
Augrented Insights Report

The 39-unit, 3-story apartment building at 3440 20th Street in San Francisco's Inner Mission neighborhood has undergone several significant renovations and ongoing maintenance over the past few years. Most notably, a major project completed in 2020 added 9 accessory dwelling units (ADUs), converting existing garage spaces and increasing the total unit count to 48. This project included substantial fire safety upgrades with the installation of new fire devices throughout the building, and the implementation of a new fire sprinkler system on the ground floor.

Recent maintenance activities include multiple washing machine and dryer installations in various units (2022-2023), boiler replacements (2021-2023), and electrical upgrades including a new 1200-amp service installation (2019). The building has faced some concerning issues in recent years, including a ceiling leak and mold problem reported in early 2024, and complaints about non-handicap accessibility filed in late 2024. There were also multiple construction-related complaints during 2020-2021 regarding work being done without proper permits, including concerns about structural integrity and window coverings during construction.

Fire safety has been a recurring concern, with violations and complaints about sleeping area requirements and blocked exits documented in 2023, 2021, and earlier years, though most have been corrected. The property has experienced several plumbing and heating system updates, including the installation of four new hot water boilers in 2023 and work to address previously unpermitted boiler installations. Recent maintenance issues have also been noted, including reports of rodent infestation and garbage management problems in late 2024.

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.

3440 20th St Report Contents

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Building Overview

Renter Risk Rating

This building is in the riskiest 10% of buildings in Inner Mission.

Building Characteristics

Total units 39
Year built 1965
Total area 26754 sq ft
Floors 3
Tax Abatements None
Building Class A15 - Apartment 15 Units or more
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Key Building Statistics

10
Building Complaints
Number of complaints filed with the Department of Building Inspection in the last 7 years.
2
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.
326
311 Calls
Number of 311 calls for this building.
0
Fire Injuries
Number of fire injuries reported by SFFD.
12
Building Permits
Number of building permits issued by DBI.

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3440 20th St Landlord Information

Ownership Data

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

NameAddress
3440 20th I1 LlcSteven C. Thrower 1 Bush St Ste 900 San Francisco CA 94104

Landlord Portfolio

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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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3440 20th 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 3440 20th St

311 Housing Complaints

The table below shows the 311 housing complaints received regarding the conditions at 3440 20th St, as well as requests for service nearby.

OpenedCategoryResponsible AgencyRequest TypeRequest DetailsStatus
2025-07-30 08:44:24+00:00 Street and Sidewalk Cleaning Recology - Abandonedgarbage_and_debrisfurniture Closed
2025-07-28 23:13:25+00:00 General Request Healthy Streets Operation Centerhomelessness_and_supportive_housinghousing_homeless request_for_service Closed
2025-07-28 23:06:37+00:00 Street and Sidewalk Cleaning Recology - Abandonedgarbage_and_debrisfurniture Closed
2025-07-25 08:07:05+00:00 Encampment Healthy Streets Operation Center - IndividualencampmentNone Closed
2025-07-20 16:33:02+00:00 Graffiti Private PW - Street and Environmental Servicesnot_offensivebuilding_residential Open
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DBI Complaints

Complaints received by the Department of Building Inspection.

Date FiledDate AbatedAssigned DivisionComplaint DescriptionStatusLink
2024-11-06 00:00:00+00:00NoneDisabled Access DivisionCustomer states that the building is not handi-cap accessible. there is no way for people with wheelchair disabilties to come in or out of the building. customer states that there is also stairs only near her apartment. (311 sr 101000982004) Not Active View on DBI
2024-02-22 00:00:00+00:002024-04-17 00:00:00+00:00Housing Inspection ServicesCeiling leaking, mold Not Active View on DBI
2021-12-01 00:00:00+00:00NonePlumbing Inspection DivisionNeeds to renew boiler permit for permit no 120083 , serial no 1629e000558 Not Active View on DBI
2021-12-01 00:00:00+00:00NonePlumbing Inspection DivisionNeeds to renew boiler permit for permit no 120084 , serial no 1635a036522 Not Active View on DBI
2021-06-03 00:00:00+00:00NoneBuilding Inspection Division3440 20th street --- 3440 20th street is 36-unit residential building owned by veritas and manage by greentree property management. the building is under going construction for the past 9 months. the contractor took down the support wall and the outer frame on the ground level leaving the 2by4 exposed. there are also trenches on the concrete base. caller is concern the integrity of the building and the contractor is making that the building vulnerable to an earthquake. (311 sr 13896358)20th to 19th on capp east sidewalk. --- concrete dust and water runoff from saw at above location.(311 sr 13897784) Not Active View on DBI
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DBI Violations

Building code violations records.

Date FiledDate AbatedItemViolation DescriptionStatus
2024-02-22T00:00:00.000Z eliminate mold/mildew on ceilings/walls (1301,1001b(13),1306 hc) excessive mold/mildew growth observed throughout unit 301. mold observed around windows and sliding glass door, in closets, on trim/baseboards and other locations. clean/eliminate all mold in an approved manner. the walls, ceilings, window frames and all affected areas should be cleaned, sanitized and repainted with a mold resistant paint. ensure all building materials are dried properly with a dehumidifier or other approved method. it is recommended that the water damage and mold be addressed by a professional water damage abatement or mold remediation company. there is excessive moisture/humidity, and possible water intrusion at this unit. locate source of elevated moisture/water intrusion and address to prevent further water intrusion or mold growth. interior surfaces sectionnot active
2024-02-22T00:00:00.000Z make necessary repairs to tub/shower (1001 hc) there appears to be grout missing at tiles in corner area of bathtub. repair/replace any missing grout/sealant at bathtub. plumbing and electrical sectionnot active
2024-02-22T00:00:00.000Z this notice includes violations for the areas noted. 3440 20th street #301 building sectionnot active
2024-02-22T00:00:00.000Z locate source of water damage (703, 1001f hc) at the time of inspection, there was evidence of water intrusion at the living room ceiling, and excessive modl throughout unit. locate and repair source of water in an approved manner to prevent further water intrusion/damage. repair any water damage, ensure building materials are dry and remediate any mold/mildew growth. provide housing inspector with written documentation regarding source of water damage & all steps taken to ensure the cessation of future leaking and water damage. interior surfaces sectionnot active
2024-02-22T00:00:00.000Z repair sink (1001f hc) repair bathroom sink. drain stopper is disconnected and the sink finish is peeling off. repair stopper and sink finish. plumbing and electrical sectionnot active
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Fire Violations

Fire code violations recorded by the San Francisco Fire Department.

Violation DateDisposition DateAddressViolation DescriptionStatus
2023-11-01T00:00:00.000Z3440 20th Stsleeping area requirements abated
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Fire Incidents

Historical fire incident records for the property.

Incident DatePrimary SituationIgnition CauseCivilian Injuries
2024-07-30 00:00:00+00:00712 Direct tie to FD, malicious false alarmNone0
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Building Permits

Permit records for 3440 20th 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
3440 20TH ST 94110The approximately 12,513-square foot project site (Assessor’s block 3595, lot 048) is located on 20th Street, on the block bounded by 19th Street to the north, South Van Ness Avenue to the east, Capp Street to the west, and 20th Street to the south in the Mission neighborhood. The existing building at the project site is a 25,644-square foot, 37-foot-tall, four-story, thirty-nine unit residential building constructed in 1965. The corner lot site is predominately built out with the existing building with the exception of an approximate 2,140-square foot alley by the northern property line accessible by Capp Street and an approximate 1,070-square foot private driveway along the eastern property line accessible on 20th Street. The existing building contains a ground floor level with a lobby, parking garage for thirty-nine vehicle stalls, and utility and storage space, with all residential units on floors two, three, and four. On the existing public facing building façade on Capp Street and 20th Street, there are a total of eight garage doors within the existing building and a ninth garage door adjacent to the building currently setback approximately 13-feet from the front property line along 20th Street providing access to a private driveway for the property. The proposal is to add 9 accessory dwelling units within the existing building envelope on the ground floor though the conversion of existing storage and utility space and the removal of thirty-one parking stalls. Eight accessory dwelling units are proposed to have new private open space patios built in front of each new unit along the existing alley and private driveway ranging in size from approximately 140 square feet through 464 square feet. There are no proposed modifications to the existing residential units on floors two, three, and four. No excavation or expansion of the existing building envelope is proposed. The building after construction of the proposed project will remain 37-feet-tall and four-stories in height and will include approximately 31,086 square feet of residential habitable space, forty-eight dwelling units, and eight off-street vehicle parking spaces. The proposed façade alterations include removal of two garage doors on the 20th Street frontage, removal of two garage doors and reduction of one garage door from double-width to single-width on the Capp Street frontage, and replacement with doors, windows, gates, and matching exterior finish material. Curb cuts will be infilled and restored where the garage doors were removed or reduced in width. An existing garage door on 20th street providing entry to the alley will be removed and replaced with a decorative concrete screen wall and stainless steel powder-coated gate. All garages removed are to be infilled with cement plaster. All new windows to be aluminum casement windows.Calhoun, Serina
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Tenant Buyouts

Tenant buyout records for the property.

BlocklotAddressAgreement DateAmountTenants
35950483440 20th StreetNoneNoneNone
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How 3440 20th St Compares

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