Permit history for 601 Union St
Seattle, WA · 52 permits on file · 2021–2026
52
Permits on file
2021
First permit
2026
Most recent
$18,400,164
Declared value (all work)
Permits on file (52)
Ordered most recent first. Data from the city's open data portal.
Commercial Tenant Improvment
Construct blanket permit tenant improvements to freeman mathis & gary on the eighth floor of existing commercial building per plan.
Status: Issued
Mar 9, 2026
Declared cost: $82,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to bgo on the 54th floor of existing commercial building per plan.
Status: Issued
Feb 9, 2026
Declared cost: $180,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to robert half on the 43rd floor of existing commercial building per plan.
Status: Issued
Dec 3, 2025
Declared cost: $445,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to bush kornfeld llp on the 46th floor of existing commercial building per plan.
Status: Issued
Dec 3, 2025
Declared cost: $85,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to alti tiedemann global on the 33rd floor of existing commercial building per plan.
Status: Issued
Nov 6, 2025
Declared cost: $320,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to future tenant on the 43rd floor of existing commercial building per plan.
Status: Issued
Nov 3, 2025
Declared cost: $25,000
Commercial Addition/Alteration
Construct tenant improvements for office space at level 54 of existing commercial building occupy per plan
Status: Issued
Oct 21, 2025
Declared cost: $2,098,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to morgan stanley on the 51st and 52nd floors of existing commercial building per plan.
Status: Issued
Sep 30, 2025
Declared cost: $150,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to baird on the 47th floor of existing commercial building per plan.
Status: Issued
Aug 21, 2025
Declared cost: $2,100,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to future tenant on the fourth floor of existing commercial building per plan.
Status: Issued
Aug 11, 2025
Declared cost: $117,000
Commercial Addition/Alteration
Construct tenant improvements for fitness center on level 1 of existing commercial building occupy per plan
Status: Issued
Aug 5, 2025
Declared cost: $949,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to lasher holzapfel sperry & ebberson on the 26th and 27th floors of existing commercial building per plan.
Status: Completed
Jul 3, 2025
Declared cost: $990,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to lina on the sixth floor of existing commercial building per plan.
Status: Completed
Jun 30, 2025
Declared cost: $65,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to the hartford on the ninth floor of existing commercial building per plan.
Status: Completed
Jun 26, 2025
Declared cost: $85,000
Commercial Addition/Alteration
Construct alteration in existing office building at level 54 per plan.
Status: Completed
Jun 4, 2025
Declared cost: $15,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to kosmos management llc on the 39th floor of existing commercial building per plan.
Status: Completed
May 28, 2025
Declared cost: $236,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to montgomery purdue on the 13th floor of existing commercial building per plan.
Status: Completed
May 9, 2025
Declared cost: $849,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to future tenant on the 54th floor of existing commercial building per plan.
Status: Issued
Apr 15, 2025
Declared cost: $1,250,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to future tenant on the 13th floor of existing commercial building per plan.
Status: Completed
Mar 13, 2025
Declared cost: $65,000
Commercial Addition/Alteration
Construct alterations to existing office building at levels 40 and 41 per plan.
Status: Completed
Jan 30, 2025
Declared cost: $6,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to williams kastner on the 40th floor of existing commercial building per plan.
Status: Completed
Jan 22, 2025
Declared cost: $960,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to indigo real estate on the 32nd floor of existing commercial building per plan.
Status: Completed
Jan 7, 2025
Declared cost: $43,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to future tenant on the 54th floor of existing commercial building per plan.
Status: Completed
Dec 13, 2024
Declared cost: $85,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to future tenant on the 54th floor of existing commercial building per plan.
Status: Completed
Dec 3, 2024
Declared cost: $52,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to principal financial in suite 2200 of existing commercial building per plan.
Status: Completed
Nov 6, 2024
Declared cost: $35,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to united capital financial advisors on the 53rd floor of existing commercial building per plan.
Status: Completed
Sep 12, 2024
Declared cost: $70,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to mckinley irvin on 30th floor of existing commercial building per plan.
Status: Completed
Mar 21, 2024
Declared cost: $31,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements for frazier healthcare in suite 3200 of existing commercial building per plan.
Status: Completed
Mar 21, 2024
Declared cost: $30,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to future tenant on the 15th floor of existing commercial building per plan.
Status: Completed
Mar 18, 2024
Declared cost: $185,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to future tenant on the 27th floor of existing commercial building per plan.
Status: Completed
Dec 7, 2023
Declared cost: $385,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to future tenant on the 33rd floor of existing commercial building per plan.
Status: Completed
Nov 16, 2023
Declared cost: $323,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to future tenant on the 31st and 32nd floors of existing commercial building per plan.
Status: Completed
Oct 17, 2023
Declared cost: $1,200,000
Commercial Addition/Alteration
Construct minor tenant improvements at levels 23 and 24 of existing office building (two union square) per plan.
Status: Completed
Sep 12, 2023
Declared cost: $30,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to future tenant on the 30th floor of existing commercial building per plan.
Status: Completed
May 1, 2023
Declared cost: $343,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to future tenant on the 33rd floor of existing commercial building per plan.
Status: Completed
Mar 9, 2023
Declared cost: $773,760
Commercial Tenant Improvment
Construct blanket permit tenant improvements to future tenant on the 16th floor of existing commercial building per plan.
Status: Completed
Dec 29, 2022
Declared cost: $250,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to future tenant on the 50th floor of existing commercial building per plan.
Status: Expired
Sep 19, 2022
Declared cost: $30,000
Commercial Tenant Improvment
Construct blanket permit tenant improvements to colliers on floor 53 of existing commercial building per plan.
Status: Completed
Jul 14, 2022
Declared cost: $333,321
Commercial Tenant Improvment
Construct blanket permit tenant improvements for jll on floor 28 of existing commercial building per plan.
Status: Completed
Jun 24, 2022
Declared cost: $396,890
Commercial Tenant Improvment
Construct blanket permit tenant improvements for jll on floor 35 of existing commercial building per plan.
Status: Completed
Jun 13, 2022
Declared cost: $10,000
Commercial Tenant Improvment
Blanket permit tenant improvements to office space for liveramp on the 24th floor per plans.
Status: Completed
Apr 15, 2022
Declared cost: $506,193
Commercial Tenant Improvment
Blanket permit tenant improvements to office space for copperpoint on the 37th floor per plans.
Status: Completed
Apr 5, 2022
Declared cost: $440,000
Commercial Tenant Improvment
Blanket permit tenant improvements to office space for physicians insurance on the 5th floor per plans.
Status: Completed
Mar 23, 2022
Declared cost: $549,000
Commercial Tenant Improvment
Blanket permit tenant improvements to office space for rael letson on the 24th floor per plans.
Status: Completed
Jan 13, 2022
Declared cost: $53,000
Commercial Tenant Improvment
Blanket permit tenant improvements to office space for future tenant on the 14th floor per plans.
Status: Completed
Nov 30, 2021
Declared cost: $90,000
Commercial Tenant Improvment
Blanket permit tenant improvements to office space for avenue 55 on the 29th floor per plans.
Status: Completed
Sep 15, 2021
Declared cost: $187,000
Commercial Tenant Improvment
Blanket permit tenant improvements to office space for protiviti on the 43rd floor per plans.
Status: Completed
Aug 13, 2021
Declared cost: $190,000
Commercial Tenant Improvment
Blanket permit tenant improvements to office space for frazier healthcare on the 32nd floor per plans.
Status: Completed
Jul 29, 2021
Declared cost: $130,000
Commercial Tenant Improvment
Blanket permit tenant improvements to office space for cumming corporation on the 18th floor per plans.
Status: Completed
Jul 26, 2021
Declared cost: $335,000
Commercial Tenant Improvment
Blanket permit tenant improvements to office space for onelin on the 17th floor per plans.
Status: Completed
Jun 4, 2021
Declared cost: $85,000
Commercial Tenant Improvment
Blanket permit tenant improvements to office space for nc apec on the 17th floor per plans.
Status: Completed
May 5, 2021
Declared cost: $72,000
Commercial Tenant Improvment
Blanket permit tenant improvements to office space for kbf on the 17th floor per plans.
Status: Completed
May 4, 2021
Declared cost: $85,000
Disclaimer: Permit data comes from Seattle's official open data portal. Records may be incomplete for older permits, and not every home-improvement project requires a permit. Verify with the Seattle building department before buying, selling, or planning work.