# Building permits at 505 Madison St, Seattle, WA

505 Madison St, Seattle has 65 building permits on record. The most recent, issued Aug 10, 2026, is for tenant improvment: Construct blanket permit tenant improvements to Booking.com on the eighth floor of existing commercial building per plan.

| Date | Type | Work | Cost | Permit |
|---|---|---|---|---|
| Aug 10, 2026 | Tenant Improvment | Construct blanket permit tenant improvements to Booking.com on the eighth floor of existing commercial building per plan. | $500,000 | [7134943-BK](https://nearbypermits.com/seattle/permit/7134943-BK/) |
| Mar 13, 2026 | Tenant Improvment | Construct blanket permit tenant improvements to future tenant on the 16th floor of existing commercial building per plan. | $1,070,000 | [7130396-BK](https://nearbypermits.com/seattle/permit/7130396-BK/) |
| Feb 18, 2026 | Tenant Improvment | Construct blanket permit tenant improvements to SCERS on the 5th floor of existing commercial building per plan. | $925,000 | [7121553-BK](https://nearbypermits.com/seattle/permit/7121553-BK/) |
| Dec 2, 2025 | Tenant Improvment | Construct blanket permit tenant improvements to Stripe on the 17th floor of existing commercial building per plan. | $3,100,000 | [7114027-BK](https://nearbypermits.com/seattle/permit/7114027-BK/) |
| Oct 14, 2025 | Tenant Improvment | Construct blanket permit tenant improvements to future tenant on the eighth floor of existing commercial building per plan. | $1,800,000 | [7110274-BK](https://nearbypermits.com/seattle/permit/7110274-BK/) |
| Aug 6, 2025 | Tenant Improvment | Construct blanket permit tenant improvements to Boston Properties on the eighth floor of existing commercial building per plan. | $1,800,000 | [7085295-BK](https://nearbypermits.com/seattle/permit/7085295-BK/) |
| Jul 21, 2025 | Tenant Improvment | Construct blanket permit tenant improvements to Mass Mutual Financial Group on the 16th floor of existing commercial building per plan. | $925,000 | [7091347-BK](https://nearbypermits.com/seattle/permit/7091347-BK/) |
| Jun 26, 2025 | Tenant Improvment | Construct blanket permit tenant improvements to Marten Law on the 27th floor of existing commercial building per plan. | $70,000 | [7092688-BK](https://nearbypermits.com/seattle/permit/7092688-BK/) |
| Apr 2, 2025 | Tenant Improvment | Construct blanket permit tenant improvements to common area on the 16th floor of existing commercial building per plan. | $50,000 | [7074206-BK](https://nearbypermits.com/seattle/permit/7074206-BK/) |
| Jan 30, 2025 | Tenant Improvment | Construct blanket permit tenant improvements to Marten Law on the 27th floor of existing commercial building per plan. | $150,000 | [7065928-BK](https://nearbypermits.com/seattle/permit/7065928-BK/) |
| Jun 27, 2024 | Tenant Improvment | Construct blanket permit tenant improvements to future tenant on the 15th floor of existing commercial building per plan. | $1,700,000 | [7025850-BK](https://nearbypermits.com/seattle/permit/7025850-BK/) |
| Jun 25, 2023 | Tenant Improvment | Construct blanket permit tenant improvements to future tenant on the 27th floor of existing commercial building per plan. | $380,000 | [6958390-BK](https://nearbypermits.com/seattle/permit/6958390-BK/) |
| Jun 25, 2023 | Tenant Improvment | Construct blanket permit tenant improvements to future tenant on the 10th floor of existing commercial building per plan. | $480,000 | [6958389-BK](https://nearbypermits.com/seattle/permit/6958389-BK/) |
| Jun 13, 2023 | Tenant Improvment | Construct blanket permit tenant improvements to future tenant on floors: 29 30 31 and 32 of existing commercial building per plan. | $110,000 | [6963428-BK](https://nearbypermits.com/seattle/permit/6963428-BK/) |
| Jun 13, 2022 | Tenant Improvment | Blanket Permit tenant improvements to office space for future tenant on the 13th floor per plans. | $660,000 | [6889385-BK](https://nearbypermits.com/seattle/permit/6889385-BK/) |
| Apr 5, 2022 | Addition or alteration | Construct alterations for tenant [STRIPE] at levels 19 through 22 of commercial office building [MADISON CENTRE] occupy per plan. | $465,282 | [6847767-CN](https://nearbypermits.com/seattle/permit/6847767-CN/) |
| Jan 31, 2022 | Addition or alteration | Construct interior alterations for commercial tenant conference rooms [RSA SEATTLE] at the 28th floor of commercial office building [MADISON CENTRE] occupy per plan. | $450,000 | [6861081-CN](https://nearbypermits.com/seattle/permit/6861081-CN/) |
| Dec 15, 2021 | Tenant Improvment | Blanket permit tenant improvements to office space for RSM on the 28th floor per plans. | $1,300,000 | [6859894-BK](https://nearbypermits.com/seattle/permit/6859894-BK/) |
| Sep 13, 2021 | Addition or alteration | Construct alterations to remove and infill communicating stair at floors 28 and 29 of commercial building per plan. | $50,000 | [6844155-CN](https://nearbypermits.com/seattle/permit/6844155-CN/) |
| Aug 24, 2021 | Tenant Improvment | Blanket permit tenant improvements to office space for Stripe on the 22nd floor per plans. | $1,100,000 | [6846897-BK](https://nearbypermits.com/seattle/permit/6846897-BK/) |
| May 5, 2021 | Addition or alteration | Construct tenant improvements at AmazonGo subject to field inspection (STFI). | $200,000 | [6819380-CN](https://nearbypermits.com/seattle/permit/6819380-CN/) |
| Dec 7, 2020 | Tenant Improvment | Blanket permit tenant improvements to office space for future tenant on the 13th floor per plans. | $150,000 | [6809283-BK](https://nearbypermits.com/seattle/permit/6809283-BK/) |
| May 14, 2020 | Tenant Improvment | Blanket permit tenant improvements to office space for Hulu on floors 24 & 25 per plans. | $120,000 | [6780475-BK](https://nearbypermits.com/seattle/permit/6780475-BK/) |
| Apr 3, 2020 | Tenant Improvment | Blanket permit tenant improvements to office space for Cigna on the 13th floor per plans. | $1,600,000 | [6760121-BK](https://nearbypermits.com/seattle/permit/6760121-BK/) |
| Oct 29, 2019 | Tenant Improvment | Blanket permit tenant improvements to office space for Assurance on the 35 & 36th floors per plans. | $5,500,000 | [6748306-BK](https://nearbypermits.com/seattle/permit/6748306-BK/) |
| Oct 28, 2019 | Tenant Improvment | Blanket permit tenant improvements to office space for Cresset Capital on the 27th floor per plans. | $350,000 | [6752918-BK](https://nearbypermits.com/seattle/permit/6752918-BK/) |
| Sep 18, 2019 | Tenant Improvment | Blanket permit tenant improvements to office space on the 27th floor per plans. | $350,000 | [6746789-BK](https://nearbypermits.com/seattle/permit/6746789-BK/) |
| Aug 22, 2019 | Tenant Improvment | Blanket permit tenant improvements to office space for Hulu on the 24th-26th floors per plans. | $3,650,000 | [6735893-BK](https://nearbypermits.com/seattle/permit/6735893-BK/) |
| Aug 20, 2019 | Tenant Improvment | Blanket permit tenant improvements to office space for Schnitzer West on the 27th floor per plans. | $803,040 | [6738162-BK](https://nearbypermits.com/seattle/permit/6738162-BK/) |
| Jul 18, 2019 | Tenant Improvment | Blanket permit tenant improvements to Textio tenant space on the 22nd floor per plans. | $2,300,000 | [6734116-BK](https://nearbypermits.com/seattle/permit/6734116-BK/) |
| Jul 11, 2019 | Addition or alteration | Construct tenant improvements to existing commercial building for new training room and new stair opening between levels 9 and 10 (Ernst and Young) occupy per plan. | $173,500 | [6719711-CN](https://nearbypermits.com/seattle/permit/6719711-CN/) |
| Jul 3, 2019 | Tenant Improvment | Blanket permit tenant improvements to office space on the 9th & 10th floors per plans. | $1,617,000 | [6721858-BK](https://nearbypermits.com/seattle/permit/6721858-BK/) |
| Jun 24, 2019 | Tenant Improvment | Blanket permit tenant improvements to office space for Cornerstone Advisors on the 4th floor per plans. | $80,000 | [6726017-BK](https://nearbypermits.com/seattle/permit/6726017-BK/) |
| Mar 21, 2019 | Tenant Improvment | Blanket permit tenant improvements to office space on the 3rd floor per plans. | $744,750 | [6714915-BK](https://nearbypermits.com/seattle/permit/6714915-BK/) |
| Feb 11, 2019 | Tenant Improvment | Blanket permit tenant improvements to office space for Westriver on the 34th floor per plans. | $660,000 | [6703475-BK](https://nearbypermits.com/seattle/permit/6703475-BK/) |
| Feb 8, 2019 | Tenant Improvment | Blanket permit tenant improvements to office space on the 10th floor per plans. | $500,000 | [6711335-BK](https://nearbypermits.com/seattle/permit/6711335-BK/) |
| Feb 8, 2019 | Tenant Improvment | Blanket permit tenant improvements to office space on the 10th floor per plans. | $25,000 | [6711333-BK](https://nearbypermits.com/seattle/permit/6711333-BK/) |
| Jan 28, 2019 | Tenant Improvment | Blanket permit tenant improvements to office space on the 21st floor for Stripe per plans. | $1,000,000 | [6702944-BK](https://nearbypermits.com/seattle/permit/6702944-BK/) |
| Nov 9, 2018 | Addition or alteration | Office tenant improvements to northwest portion of level 07 for employee break room and occupy per plans. | $124,500 | [6673616-CN](https://nearbypermits.com/seattle/permit/6673616-CN/) |
| Oct 16, 2018 | Tenant Improvment | Blanket permit tenant improvements to office space for B+H on the 6th floor per plans. | $30,000 | [6692346-BK](https://nearbypermits.com/seattle/permit/6692346-BK/) |
| Oct 4, 2018 | Tenant Improvment | Blanket permit tenant improvements to office space for Booking.com on the 7th floor per plans. | $1,540,500 | [6676411-BK](https://nearbypermits.com/seattle/permit/6676411-BK/) |
| Sep 27, 2018 | Tenant Improvment | Blanket permit tenant improvements to office space for WeWork on the 15-18 floors per plans. | $4,000,000 | [6689499-BK](https://nearbypermits.com/seattle/permit/6689499-BK/) |
| Aug 28, 2018 | Tenant Improvment | TI work to new office space. | $2,800,000 | [6679255-BK](https://nearbypermits.com/seattle/permit/6679255-BK/) |
| Aug 24, 2018 | Addition or alteration | Structural alterations to office spaces on level 14 for training rooms and break room and occupy per plans. | $100,000 | [6658445-CN](https://nearbypermits.com/seattle/permit/6658445-CN/) |
| Aug 15, 2018 | Tenant Improvment | 10 000' Sqr ft TI NEW construction buildout of Power Lighting Mechanical and Life Safety | $250,000 | [6671219-BK](https://nearbypermits.com/seattle/permit/6671219-BK/) |
| Jul 10, 2018 | Tenant Improvment | Non-Structural Blanket Permit TI for Interior work at Madison Centre | $250,000 | [6673750-BK](https://nearbypermits.com/seattle/permit/6673750-BK/) |
| May 25, 2018 | Tenant Improvment | Blanket Permit for interior non-structural alterations for "First American Title Company" on the 12th and 13th floors per plan. | $1,378,114 | [6655007-BK](https://nearbypermits.com/seattle/permit/6655007-BK/) |
| Apr 26, 2018 | Tenant Improvment | Blanket Permit for interior non-structural alterations for tenant demising on the 34th floor per plan. | – | [6655008-BK](https://nearbypermits.com/seattle/permit/6655008-BK/) |
| Apr 26, 2018 | Tenant Improvment | Blanket Permit for interior non-structural alterations. Tenant improvement on the 27th floor "Schnitzer" per plan. | – | [6653751-BK](https://nearbypermits.com/seattle/permit/6653751-BK/) |
| Apr 26, 2018 | Tenant Improvment | Blanket Permit for interior non-structural alterations. Tenant improvement on 13th floor "Schnitzer" per plan. | – | [6653750-BK](https://nearbypermits.com/seattle/permit/6653750-BK/) |
| Apr 24, 2018 | Tenant Improvment | Blanket Permit for interior non-structural alterations. Tenant improvement on the 8th floor "Schnitzer" per plan. | – | [6653749-BK](https://nearbypermits.com/seattle/permit/6653749-BK/) |
| Apr 24, 2018 | Tenant Improvment | Blanket Permit for interior non-structural alterations. Tenant improvement on 14th floor for "Portent" per plans. | – | [6652591-BK](https://nearbypermits.com/seattle/permit/6652591-BK/) |
| Apr 18, 2018 | Addition or alteration | Construct tenant improvements to existing commercial office high-rise building (Madison Centre) on the 4th 5th and 28th thru 33rd floors occupy per plan. | $17,000,000 | [6601636-CN](https://nearbypermits.com/seattle/permit/6601636-CN/) |
| Apr 6, 2018 | Tenant Improvment | Blanket Permit for interior non-structural alterations. Tenant improvement on the 6th floor for Schnitzer / B&H Architects per plan. | – | [6645002-BK](https://nearbypermits.com/seattle/permit/6645002-BK/) |
| Mar 1, 2018 | Tenant Improvment | Blanket Permit for interior non-structural alterations. Tenant improvement for "Schnitzer" 4th floor per plans. | – | [6640783-BK](https://nearbypermits.com/seattle/permit/6640783-BK/) |
| Dec 26, 2017 | Addition or alteration | Construct Initial Tenant Improvement for retail business on ground floor of a commercial building occupy per plans. | $476,713 | [6614788-CN](https://nearbypermits.com/seattle/permit/6614788-CN/) |
| Nov 18, 2017 | Addition or alteration | Alterations to SE portion of 23rd floor for board room and assembly seating area accessory to office tenant and occupy per plans. | $100,000 | [6613890-CN](https://nearbypermits.com/seattle/permit/6613890-CN/) |
| Oct 5, 2017 | Tenant Improvment | Blanket Permit for interior non-structural alterations. Interior alterations floor 23 per plan. | – | [6614209-BK](https://nearbypermits.com/seattle/permit/6614209-BK/) |
| Sep 20, 2017 | Tenant Improvment | Blanket Permit for interior non-structural alterations on the 4th floor for Schnitzer West. Includes common corridor per plan. | – | [6614750-BK](https://nearbypermits.com/seattle/permit/6614750-BK/) |
| Aug 3, 2017 | Addition or alteration | Construct alterations to existing mixed used building for new interior convenience stair between floors 10 and 11 per plan. | $26,975 | [6590873-CN](https://nearbypermits.com/seattle/permit/6590873-CN/) |
| Jul 13, 2017 | Tenant Improvment | Blanket Permit for interior non-structural alterations to part of the 10th and all of the 11th floor. For EY per plan. | – | [6594905-BK](https://nearbypermits.com/seattle/permit/6594905-BK/) |
| May 16, 2017 | Tenant Improvment | Blanket Permit for interior non-structural alterations for Floor 10 Common Corridor per plan. | – | [6592312-BK](https://nearbypermits.com/seattle/permit/6592312-BK/) |
| Feb 2, 2016 | Addition or alteration | Initial tenant improvement to portions of 1st 2nd and 3rd floor common areas of future office building (Madison Centre) including fitness center meeting rooms and lounge areas and occupy per plans. | $3,025,620 | [6376308-CN](https://nearbypermits.com/seattle/permit/6376308-CN/) |
| May 17, 2013 | Demolition | Demo two existing 3-story commercial structures per plan and subject to field inspection" (Excavation/shoring 6148655 MUP 3006834) | – | [6148657-DM](https://nearbypermits.com/seattle/permit/6148657-DM/) |
| May 17, 2013 | New | Shoring and Excavation only for construction of a high-rise/ office retail and below grade parking structure. | $7,000,000 | [6148655-CN](https://nearbypermits.com/seattle/permit/6148655-CN/) |

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Source: Seattle Department of Construction and Inspections permit data (https://cos-data.seattle.gov/d/76t5-zqzr). Checked 2026-10-01 10:10 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/