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1120 12th Ave

Latest activity over three months agoCompleted

About this project

Land Use Application to allow a 5-story institution (Home of the Upper School). Parking for 25 vehicles proposed. Existing buildings to be demolished.

Permits

3038541-LUMaster UseIssued
Land Use Application to allow a 5-story institution (Home of the Upper School). Parking for 25 vehicles proposed. Existing buildings to be demolished.
3038606-LUMaster UseAdditional Info Requested
The project is identified as the Home of the Upper School (HoUS) includes (5) stories of academic spaces; one level of below grade parking, storage and mechanical spaces; a mechanical penthouse; and an outdoor community space that will serve as a connector to other buildings on the block). The academic floors will incorporate classrooms for grades 9 - 12, spaces that support upper school students
3038607-LUMaster UseAdditional Info Requested
The project is identified as the Home of the Upper School (HoUS) includes (5) stories of academic spaces; one level of below grade parking, storage and mechanical spaces; a mechanical penthouse; and an outdoor community space that will serve as a connector to other buildings on the block). The academic floors will incorporate classrooms for grades 9 - 12, spaces that support upper school students
3031557-LUMaster UseWithdrawn
Change of use from existing 24,000 SF warehouse to new classroom building. Site work includes accessible path to new primary entrance. Interior work includes non-structural partitions and MEP upgrades. Existing parking spaces to remain (4 surface and 8 below-grade).
6466065-CNConstructionCompleted
Construct alterations to mini-storage warehouse at west end of existing commercial building per plan
6859476-CNConstructionCompleted
Establish use as school (institutional use) per land use code. Construct new institutional building for Seattle Academy of Arts and Sciences Home of the Upper School (HoUS) and occupy per plan
6859477-DMDemolitionCompleted
Demolish existing warehouse building and associated site improvements partial basement walls to remain per plan.

Documents

56 documents tracked here, newest first — of 759 on file with the city.
Mar 30, 2026Permit
Permit · 7076915-EL · Electrical Permit: Over the Counter
Mar 18, 2026Contact Update Sheet
Contact Update Sheet · EQP-SI-11529 · Site - Equipment
Jan 29, 2026Certificate of Occupancy
Certificate of Occupancy · 6859476-CN · Construction Permit
Dec 16, 2025Temporary Certificate of Occupancy
Temporary Certificate of Occupancy · 6859476-CN · Construction Permit
Sep 24, 2025Field Requested Supporting Document
Field Requested Supporting Document · 6994630-SS · Side Sewer Permit
Sep 24, 2025Side Sewer As-Built Diagram
Side Sewer As-Built Diagram · 6994630-SS · Side Sewer Permit
Sep 2, 2025Billing Invoice
Billing Invoice · 6994630-SS · Side Sewer Permit
Aug 20, 2025Field Requested Supporting Document
Field Requested Supporting Document · 6859476-CN · Construction Permit
Aug 19, 2025Correction Letter
Correction Letter · 6859476-CN · Construction Permit
Aug 15, 2025Special Inspection Final Report
Special Inspection Final Report · 6859476-CN-007 · Special Inspection
Aug 14, 2025Optional Applicant Upload
Optional Applicant Upload · 6859476-CN · Construction Permit
Aug 14, 2025Optional Applicant Upload
Optional Applicant Upload · 6859476-CN · Construction Permit
Aug 14, 2025Special Inspection Field Report
Special Inspection Field Report · 6938594-ME-003 · Special Inspection
Aug 13, 2025Special Inspection Final Report
Special Inspection Final Report · 6859476-CN-004 · Special Inspection
Aug 13, 2025Special Inspection Field Report
Special Inspection Field Report · 6859476-CN-004 · Special Inspection
Aug 13, 2025Special Inspection Field Report
Special Inspection Field Report · 6859476-CN-004 · Special Inspection
Aug 13, 2025Special Inspection Field Report
Special Inspection Field Report · 6859476-CN-004 · Special Inspection
Aug 13, 2025Special Inspection Field Report
Special Inspection Field Report · 6859476-CN-004 · Special Inspection
Aug 13, 2025Special Inspection Field Report
Special Inspection Field Report · 6859476-CN-004 · Special Inspection
Aug 13, 2025Special Inspection Field Report
Special Inspection Field Report · 6859476-CN-004 · Special Inspection
Aug 13, 2025Special Inspection Field Report
Special Inspection Field Report · 6859476-CN-004 · Special Inspection
Aug 13, 2025Special Inspection Field Report
Special Inspection Field Report · 6859476-CN-004 · Special Inspection
Aug 13, 2025Special Inspection Field Report
Special Inspection Field Report · 6859476-CN-004 · Special Inspection
Aug 13, 2025Special Inspection Field Report
Special Inspection Field Report · 6859476-CN-004 · Special Inspection
Aug 13, 2025Special Inspection Field Report
Special Inspection Field Report · 6859476-CN-004 · Special Inspection
Aug 13, 2025Special Inspection Field Report
Special Inspection Field Report · 6859476-CN-004 · Special Inspection
Aug 12, 2025Side Sewer As-Built Diagram
Side Sewer As-Built Diagram · 6995401-SS · Side Sewer Permit
Aug 11, 2025Side Sewer As-Built Diagram
Side Sewer As-Built Diagram · 7075239-SS · Side Sewer Permit
Aug 11, 2025Side Sewer As-Built Diagram
Side Sewer As-Built Diagram · 7075234-SS · Side Sewer Permit
Aug 11, 2025Side Sewer As-Built Diagram
Side Sewer As-Built Diagram · 7075218-SS · Side Sewer Permit
Aug 7, 2025Permit
Permit · 6994630-SS · Side Sewer Permit
Aug 7, 2025Special Inspection Final Report
Special Inspection Final Report · 6938594-ME-003 · Special Inspection
Aug 7, 2025Special Inspection Final Report
Special Inspection Final Report · 6859476-CN-006 · Special Inspection
Aug 5, 2025Record Snapshot
Record Snapshot · 7100060-CY · Conveyance Permit
Aug 5, 2025Permit
Permit · 7100060-CY · Conveyance Permit
Aug 5, 2025Record Snapshot
Record Snapshot · 7100060-CY · Conveyance Permit
Aug 4, 2025Correction Letter
Correction Letter · 6859476-CN · Construction Permit
Aug 4, 2025Correction Letter
Correction Letter · 6859476-CN · Construction Permit
Aug 4, 2025Inspection Report
Inspection Report · 6859476-CN · Construction Permit
Aug 2, 2025Billing Invoice
Billing Invoice · 6994630-SS · Side Sewer Permit
Jul 29, 2025Record Snapshot
Record Snapshot · 25DPD-024962 · Shop Drawing
Jul 29, 2025Record Snapshot
Record Snapshot · 25DPD-024943 · Shop Drawing
Jul 29, 2025Record Snapshot
Record Snapshot · 25DPD-024939 · Shop Drawing
Jul 15, 2025Special Inspection Field Report
Special Inspection Field Report · 6859476-CN-006 · Special Inspection
Jul 2, 2025Billing Invoice
Billing Invoice · 6994630-SS · Side Sewer Permit
Jul 1, 2025Special Inspection Field Report
Special Inspection Field Report · 6859476-CN-006 · Special Inspection
Jun 23, 2025Record Snapshot
Record Snapshot · 7092542-CY · Conveyance Permit
Jun 23, 2025Permit
Permit · 7092542-CY · Conveyance Permit
Jun 23, 2025Record Snapshot
Record Snapshot · 7092542-CY · Conveyance Permit
Jun 2, 2025Billing Invoice
Billing Invoice · 6994630-SS · Side Sewer Permit
May 2, 2025Billing Invoice
Billing Invoice · 6994630-SS · Side Sewer Permit
May 1, 2025Record Snapshot
Record Snapshot · 7075239-SS · Side Sewer Permit
May 1, 2025Permit
Permit · 7075239-SS · Side Sewer Permit
Apr 24, 2025Special Inspection Field Report
Special Inspection Field Report · 6859476-CN-006 · Special Inspection
Apr 18, 2025Special Inspection Field Report
Special Inspection Field Report · 6859476-CN-006 · Special Inspection
Apr 17, 2025Record Snapshot
Record Snapshot · 7081283-CY · Conveyance Permit