Thomas John Walsh
- Listed as
- contractor, designer
- Firm
- On Square Corporation
- Based in
- Daly City
- On San Francisco permits
- Mar 2023 to Sep 2026
14 permits since 2000 (contractor on 14 permits, designer on 1 permit): 7 completed, 7 in progress.
This is the city’s permit record, not a license check: the role and the number come from what was written on each permit (the number spelled one way). It does not show whether the license is current. Their ranked record as a contractor is on their contractor page. How to read these records
Most recent permits
| Filed | Outcome | Address | Contractor | Work described on the permit | Declared cost |
|---|---|---|---|---|---|
| Sep 14, 2026 | Completed final sign-off Sep 2026 | 3270 20th St | On Square Corporation | in kind repairs to less than 50% of existing deck and stairs per sb-326 and sf-604 inspection reports to replace rotten wood. common areas for condo building - not visible from street.Details
in kind repairs to less than 50% of existing deck and stairs per sb-326 and sf-604 inspection reports to replace rotten wood. common areas for condo building - not visible from street. | $5,824 |
| Aug 21, 2026 | In progress issued Aug 2026 | 927 Vallejo St | On Square Corporation | revision to pa 202607165134 follwing on-site inspection with sfdbi, revision to footing detail, staircase landings, and shear design, to accomodate actual site conditionsDetails
revision to pa 202607165134 follwing on-site inspection with sfdbi, revision to footing detail, staircase landings, and shear design, to accomodate actual site conditions | |
| Jul 16, 2026 | In progress issued Jul 2026 | 927 Vallejo St | On Square Corporation | demolish existing back stairs/secondary egress and build new back stairs/secondary egress to comply with nov complaint 202657906 and nov 201711592 (not visible from the street)Details
demolish existing back stairs/secondary egress and build new back stairs/secondary egress to comply with nov complaint 202657906 and nov 201711592 (not visible from the street) | $38,789 |
| May 7, 2026 | In progress issued May 2026 | 290 Avila St | On Square Corporation | remove (e) brick in backyard. digout and prepare substrate 8-10" and grade, replace (e) gas line to (e) bbq island and extend for (n) fire pit. trench for new water line for (n) 3/4" mht hose bib, sperad layer of 3/4" open graded aggregate, compact,and arrange geogird for stabilization. fill with 6Details
remove (e) brick in backyard. digout and prepare substrate 8-10" and grade, replace (e) gas line to (e) bbq island and extend for (n) fire pit. trench for new water line for (n) 3/4" mht hose bib, sperad layer of 3/4" open graded aggregate, compact,and arrange geogird for stabilization. fill with 6 | $38,728 |
| Apr 20, 2026 | In progress issued May 2026 | 476 38th Av | On Square Corporation | demo (e) deck and underlaying concrete. layout for new 4x4 posts and footings. excavate and place rebar/concrete for new footings. install weed barier. construct new deck-finish layer is composite timber tech products. 42" guardrail along all open edges.Details
demo (e) deck and underlaying concrete. layout for new 4x4 posts and footings. excavate and place rebar/concrete for new footings. install weed barier. construct new deck-finish layer is composite timber tech products. 42" guardrail along all open edges. | $48,738 |
| Jan 14, 2026 | In progress issued Jan 2026 | 476 38th Av | On Square Corporation | demolish the existing powder room to enlarge and renovate the kitchen. perform structural modification to create an open connection between the kitchen and dining room. provide a new powder room within the existing sunroom.Details
demolish the existing powder room to enlarge and renovate the kitchen. perform structural modification to create an open connection between the kitchen and dining room. provide a new powder room within the existing sunroom. | $78,342 |
| Nov 6, 2025 | In progress issued Nov 2025 | 96 Crestline Dr | On Square Corporation | repair exterior deck & stairs (less than 50%) at rear.Details
repair exterior deck & stairs (less than 50%) at rear. | $14,309 |
| Oct 30, 2025 | Completed final sign-off Mar 2026 | 6035 Geary Bl | On Square Corporation | remodel kitchen including four windows in light well, non street facing. remodel bathroom, like for like, using existing tub. replace window for bathroom, non street facing. replace subpanel. plumbing and electrical. remodel in-kind. u factor less than 0.30.Details
remodel kitchen including four windows in light well, non street facing. remodel bathroom, like for like, using existing tub. replace window for bathroom, non street facing. replace subpanel. plumbing and electrical. remodel in-kind. u factor less than 0.30. | $59,872 |
| Oct 7, 2025 | Completed final sign-off Feb 2026 | 2083 28th Av | On Square Corporation | existing bay window,remove (e)stucco to investigate water intrusion & replace like for like.Details
existing bay window,remove (e)stucco to investigate water intrusion & replace like for like. | $15,000 |
| Oct 1, 2025 | Completed final sign-off Sep 2026 | 2548 Hyde St | On Square Corporation | renovation of existing bathroom, new plumbing and electrical, new fixtures, tiles, vanity, mirrors. like for like remodel.Details
renovation of existing bathroom, new plumbing and electrical, new fixtures, tiles, vanity, mirrors. like for like remodel. | $48,728 |
| Oct 1, 2025 | In progress filed Oct 2025, not yet issued | 2548 Hyde St | On Square Corporation | renovation of (e) bathroom in kind. new plumbing and electrical. new fixtures. new tile, vanity, mirror.Details
renovation of (e) bathroom in kind. new plumbing and electrical. new fixtures. new tile, vanity, mirror. | $48,728 |
| Jan 22, 2025 | Completed final sign-off Aug 2025 | 2044 Jefferson St | On Square Corporation | in kind renovations following a flood. renovate one bathroom as per plan on the upper floor.Details
in kind renovations following a flood. renovate one bathroom as per plan on the upper floor. | $101,283 |
| May 22, 2024 | Completed final sign-off May 2025 | 1255 California St | On Square Corporation | unit #204: remodel existing condomoinium new flooring, kitchen, 2 full baths, new electric fire placeDetails
unit #204: remodel existing condomoinium new flooring, kitchen, 2 full baths, new electric fire place | $178,000 |
| Mar 1, 2023 | Completed final sign-off Apr 2023 | 766 Hayes St | On Square Corporation | to comply with nov# 202070301, repair stairs 50% or less.Details
to comply with nov# 202070301, repair stairs 50% or less. | $8,670 |