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Building and Landlord Data Analysis Report

491-495 Frederick St, San Francisco, CA 94117

1
Complaints
2
Fire Incidents
252
311 Calls
12
Permits

Risk Assessment

19
High Risk

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

Our AI predicts there is a 19% chance of no major maintenance issues.
Augrented Insights Report

The three-story, 12-unit multi-family residential building at 491-495 Frederick Street in Parnassus/Ashbury Heights, owned by Benny Cheung Revoc Tr, has undergone significant improvements and faced various challenges since its construction in 1909. Most notably, in 2018, the building completed mandatory soft story retrofits for both residential and commercial portions, totaling $110,000 in improvements, bringing the structure into compliance with 2016 SF Building Code requirements.

The building's systems have been regularly maintained and upgraded, with substantial electrical and plumbing work completed in 2007-2019, including comprehensive rewiring and bathroom renovations. Recent events of particular note include a set of building compliance issues in January 2024, involving the fire escape ladder maintenance and Section 604 compliance, which were resolved within a week. The property experienced a fire safety violation in August 2024 regarding operating without a permit, though this was subsequently abated.

While the building has experienced various issues since 2004, including concerns about security, fire escape conditions, and infrastructure problems (such as dry rot in 2005), these have generally been addressed promptly. The property is currently operating under valid permits for both residential and commercial uses, including a Type 41 ABC license for full-service restaurant use with specified operational hours. Recent property maintenance records show attention to external cleanliness, with multiple graffiti incidents reported and addressed through city services between late 2024 and early 2025.

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 Cole Valley/Parnassus Heights.

Building Characteristics

Total units 12
Year built 1909
Total area 8850 sq ft
Floors 3
Tax Abatements None
Building Class A5 - Apartment 5 to 14 Units
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Key Building Statistics

1
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.
2
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.
252
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.

Included Addresses

  • 495 Frederick St, San Francisco CA 94117
  • 491 Frederick St, San Francisco CA 94117
  • 493 Frederick St, San Francisco CA 94117

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491-495 Frederick St Landlord Information

Ownership Data

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

NameAddress
Benny Cheung Revoc TrCheung Benny Trustee 765 Market St Apt 29G San Francisco CA 94103

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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491-495 Frederick 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 491-495 Frederick St

311 Housing Complaints

The table below shows the 311 housing complaints received regarding the conditions at 491-495 Frederick St, as well as requests for service nearby.

OpenedCategoryResponsible AgencyRequest TypeRequest DetailsStatus
2025-07-31 18:47:47+00:00 Street and Sidewalk Cleaning Recology - Abandonedgarbage_and_debrisother_bagged_boxed_contained_garbage Closed
2025-07-29 13:20:50+00:00 Graffiti Public US Postal Service Maintenancenot_offensivemail_box Open
2025-07-25 19:53:50+00:00 Graffiti Public US Postal Service Maintenancenot_offensivemail_box Open
2025-07-23 09:00:47+00:00 Street and Sidewalk Cleaning Recology - Abandonedgarbage_and_debrisother_bagged_boxed_contained_garbage Closed
2025-06-26 18:41:51+00:00 Street and Sidewalk Cleaning Recology - Abandonedgarbage_and_debrisfurniture Closed
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DBI Complaints

Complaints received by the Department of Building Inspection.

Date FiledDate AbatedAssigned DivisionComplaint DescriptionStatusLink
2025-03-31 00:00:00+00:002025-04-01 00:00:00+00:00Building Inspection DivisionCaller stated this is for dist 18 inspector michael chan. this commercial store is doing renovating without permit. no job card posted. the front entrance has ada issue. no access for ada. (311 sr 101001682644) Not Active View on DBI
2024-01-24 00:00:00+00:002024-01-30 00:00:00+00:00Housing Inspection ServicesNo violations; affidavits due. Not Active View on DBI
2020-02-06 00:00:00+00:00NoneCode Enforcement SectionVacant storefront Not Active View on DBI
2011-11-10 00:00:00+00:002012-02-02 00:00:00+00:00Housing Inspection ServicesRoutine Not Active View on DBI
2005-03-02 00:00:00+00:002005-06-01 00:00:00+00:00Housing Inspection ServicesAnother stairway at south west needs to be repaired ( structural and dryrot problems ) Not Active View on DBI
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DBI Violations

Building code violations records.

Date FiledDate AbatedItemViolation DescriptionStatus
2024-01-24T00:00:00.000Z inspectors comment submit the completed affidavit and maintenance cert by the reinspection date; there will be no onsite reinspection. contact the inspector if unable to complete by the reinspection date. the affidavit and fire escape documentation can be submitted directly to the inspector at: stephen.mungovan@sfgov.org building sectionnot active
2024-01-24T00:00:00.000Z 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
2024-01-24T00:00:00.000Z repair, maintain fire escape drop ladder in working condition (sec 908 hc) at the time of re-inspection the property owner or agent must demonstrate the workability of the fire escape ladder(s) or provide written documentation from a qualified service company or contractor stating that all parts are in good working order. building sectionnot active
2024-01-24T00:00:00.000Z 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 at stephen.mungovan@sfgov.org or to 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
2024-08-15T00:00:00.000Z491 - 495 Frederick Stpermit / lp gas abated
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Fire Incidents

Historical fire incident records for the property.

Incident DatePrimary SituationIgnition CauseCivilian Injuries
2025-04-04 00:00:00+00:00500W Welfare CheckNone0
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Building Permits

Permit records for 491-495 Frederick 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 491-495 Frederick St Compares

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