1900 9th Ave
Building permits, Seattle, WA
1900 9th Ave, Seattle has 31 building permits on record. The most recent, issued Dec 17, 2025, is for addition or alteration: Construct alterations to 5th floor subject to field inspection.
All permits at this address
| Date | Type | Work | Cost |
|---|---|---|---|
| Addition or alteration | Construct alterations to 5th floor subject to field inspection. | $700,000 | |
| Addition or alteration | Construct tenant improvements for lobby & storage space at level 1 of existing institutional building (Seattle Children's Research Institute) occupy per plan | $900,000 | |
| Addition or alteration | Construct tenant improvement in basement/L - 1 of hospital per plans. Mechanical included this permit | $4,500,000 | |
| Addition or alteration | Tenant improvements to existing kitchen and lounge areas at level 6 of existing life sciences building (Seattle Children's Research Institute) subject to field inspection. | $125,000 | |
| Addition or alteration | Tenant improvements at level 6 of existing research laboratory (Seattle Children's Research Institute - JMB Building) per plan. | $14,051 | |
| Addition or alteration | Construct tenant improvements to office & research laboratory spaces at levels 10 & 11 of existing mixed-use structure (Seattle Children's Research Institute) occupy per plan… | $4,321,226 | |
| Addition or alteration | Construct tenant improvements to existing commercial building (Seattle Childrens research institute) at level 7 per plan. | $750,000 | |
| Addition or alteration | Tenant Improvement to level 6 of existing lab spaces subject to field inspection STFI. | $225,000 | |
| Addition or alteration | Construct tenant improvements to existing commercial building at levels 8 and 9 subject to field inspection. | $50,000 | |
| Addition or alteration | Construct alterations to elevator lobbies on floors 5 6 7 9 10 and 11 of Children's Research Institute building subject to field inspection (STFI). | $235,000 | |
| Addition or alteration | Partial remodel of 5th floor office space subject to field inspection STFI. | $10,000 | |
| Addition or alteration | Construct interior alterations to remodel "health rooms" at 7th 9th and 10th floors for tenant [SEATTLE CHILDRENS RESEARCH INSTITUTE] in commercial building subject to field… | $250,000 | |
| Addition or alteration | Construct interior non-structural alterations to portions of research lab [SEATTLE CHILDREN'S RESEARCH INSTITUTE] in commercial building per plan. | $1,900,000 | |
| Addition or alteration | Office tenant improvements to southeast portion of 5th floor subject to field inspection. | $369,192 | |
| Addition or alteration | Interior non-structural tenant improvements to existing commercial building (locker rooms/restrooms 11th floor) subject to field inspection (STFI). | $100,000 | |
| Addition or alteration | Alterations to existing locker rooms on 7th and 9th floors of existing medical office/lab building subject to field inspection. | $90,000 | |
| Addition or alteration | Construct interior alterations to existing restrooms on 11th floor of existing commercial building subject to field inspection (STFI). | $95,243 | |
| Addition or alteration | Tenant improvements (add locker rooms) to level P2 of existing office bldg subject to field inspection (STFI). | $100,000 | |
| Addition or alteration | Tenant improvements (remodel restrooms) to existing office space subject to field inspection (STFI). | $95,000 | |
| Addition or alteration | Remodel bathrooms on floors 7 and 10 of existing office building subject to field inspection (STFI). | $190,000 | |
| Addition or alteration | Interior alteration to existing commercial building (1st floor room 126 center of building) | $80,000 | |
| Addition or alteration | Tenant improvements to existing basement and first floor research lab space for Children's Research Institute per plans. (project includes mechanical work) | $600,000 | |
| Addition or alteration | Construct alterations to the storage rooms in the basement of existing medical office building (Seattle Children's Building 1) per floor plan and STFI. | $7,500 | |
| Addition or alteration | Construct tenant improvements to existing research building on floor 1 at the aquatics suite per plan | $1,600,000 | |
| Addition or alteration | Interior non-structural alteration(partion wall and new door) on level 10 for Children Hospital Research Institue per floor plan. Subject to field inspections. Stfi | $13,000 | |
| Addition or alteration | Replace wood roof decking with granite pavers on terrace Level 10 SW corner of existing Children's Hospital Research Institute / STFI | $75,000 | |
| Addition or alteration | Interior alterations to lobby on 1st floor for "Seattle Children's research Institute" per plan. mechanical included | $595,000 | |
| Addition or alteration | Alterations to portion of research and development laboratory including raised floor slab and mechanical alteration per plan. | $225,000 | |
| Addition or alteration | Interior alterations to floors 1 5 6 & 10 (mechanical included). | $16,119,413 | |
| Addition or alteration | Interior tenant improvements to floors 7 8 & 9 no change in exiting fire resistance or energy subject to field inspection. | $200,000 | |
| Addition or alteration | Interior improvements to add vivarium in basement and support areas on 1st floor in existing lab/office building per plans | $5,270,150 |
Checked 2026-10-01 11:46 UTC against Seattle Department of Construction and Inspections permit data. Markdown · JSON