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Historic preservation · Planning application

Window replacement approved with conditions for historic commercial building

The city approved replacing six vinyl windows on a building addition with metal-clad wood ones, on the condition that existing wood windows are kept and repaired. The owners are also planning a new cedar shake roof and repainting.

ApprovedDRH26-00208Filed June 18, 2026Downtown Boise · 420 W Idaho St+1 related filing
Site plan for Window replacement approved with conditions for historic commercial building
Site plan from the application documents.
Pin at the reported location; the shaded outline is the primary parcel (Ada County).

From the filing

The application's description as it appears in City of Boise's record. See the official record

The project would replace six vinyl windows on the addition of a commercial building at 420 W Idaho Street in downtown Boise's historic district. The new windows would be metal-clad wood, and the building's existing wood windows would be kept and repaired. The city's Planning Director approved the work with conditions.

Commercial Building within in the Historic District

Project name on file: 420 W IDAHO ST

Timeline

  1. Sept. 8, 2026

    Appeal Period: Completed

  2. Aug. 27, 2026

    Review Complete: Completed

  3. Aug. 27, 2026

    DR: Complete

  4. Aug. 24, 2026

    DR: In Review

  5. Aug. 24, 2026

    Assign Reviewers: Completed

  6. July 15, 2026

    Review Complete: Corrections Required

  7. July 15, 2026

    DR: Corrections Required

  8. July 9, 2026

    DR: In Review

  9. July 9, 2026

    Assign Reviewers: Completed

  10. July 1, 2026

    Review Complete: Corrections Required

  11. July 1, 2026

    DR: Notes

  12. July 1, 2026

    DR: Corrections Required

  13. June 23, 2026

    DR: In Review

  14. June 23, 2026

    Assign Reviewers: Completed

  15. June 22, 2026

    Fee Payment: Payment Received

  16. June 22, 2026

    Prescreen Review: Passed

  17. June 18, 2026

    Prescreen Review: In Progress

  18. June 18, 2026

    Application Submittal: ePlanReview

  19. June 18, 2026

    Application filed

Documents

Plans

  • Sheet A0.01 showing the site and landscaping plan, existing street trees and shrubs to remain, trash and recycling cart storage, and a new bike rack location, with the project scope to paint the exterior, replace…

    June 24, 2026 · 1 page · 8.3 MB · PDS-Maps and Drawings

    Download Cover sheet and site and landscaping plan, Certificate of Appropriateness
  • Architectural floor plan for the Certificate of Appropriateness, with keynotes for an exterior window replacement, exterior wall repainting and exterior door repainting and restaining.

    June 24, 2026 · 1 page · 1.5 MB · PDS-Maps and Drawings

    Download Existing floor plan with exterior keynotes
  • North and west building elevation drawings for the Certificate of Appropriateness application, with Northridge Architecture named on the sheet.

    June 24, 2026 · 1 page · 5.5 MB · PDS-Maps and Drawings

    Download North and west elevations
  • Elevation drawing for the south and east sides of the building, with notes on materials such as Cedar Ridge roofing, stone, and black foundation trim.

    June 24, 2026 · 1 page · 5.7 MB · PDS-Maps and Drawings

    Download South and east elevations

Project narrative

  • Drawing sheet A0.01 with the site and landscaping plan, showing trash and recycling cart storage, a new bike rack location, and existing trees and shrubs to remain, plus a drawing index and code data.

    Aug. 25, 2026 · 1 page · 8.4 MB · PDS-Letter of Intent

    Download Cover sheet and site/landscaping plan, revision 08.21.26
  • Architectural floor plan sheet for the Certificate of Appropriateness, showing office and restroom layouts with room numbers and a revision dated 08.21.26.

    Aug. 25, 2026 · 1 page · 1.8 MB · PDS-Letter of Intent

    Download Floor plan, sheet A2.11 (revision 08.21.26)
  • Describes replacing the cedar shake mansard roof shingles, repainting the body and trim, and replacing the vinyl windows with black fiberglass-clad double-hung units.

    Aug. 25, 2026 · 1 page · 260 KB · PDS-Letter of Intent

    Download Letter of intent for exterior roof, paint and window work
  • Architect's letter describing planned replacement of cedar shake mansard roof shingles, exterior repainting in beige and black trim, and double-hung window replacement.

    June 24, 2026 · 1 page · 257 KB · PDS-Letter of Intent

    Download Letter of intent for exterior roof, paint and window replacement

Decisions

  • Planning and Development Services approves replacing six vinyl windows under a minor Certificate of Appropriateness, subject to attached conditions of approval.

    Aug. 28, 2026 · 12 pages · 357 KB · PDS-Certificate of Appropriateness

    Download Approval letter for window replacement certificate
  • Architect's letter requesting approval to replace deteriorated historic wood windows, with a contractor's photo-by-photo condition assessment explaining why repair is not feasible.

    July 9, 2026 · 6 pages · 17.1 MB · PDS-Other Small Docs

    Download Window replacement explanation with condition photos

Notices

  • Notice that a Certificate of Appropriateness to replace six vinyl windows in a downtown historic design overlay zone was approved, with appeals due by September 8, 2026.

    Aug. 26, 2026 · 2 pages · 1.0 MB · PDS-Legal Notice

    Download Notice of approval

Application

  • Application form for a minor Certificate of Appropriateness for a commercial building in the historic district, with no proposed new structures and no tree removal.

    June 18, 2026 · 5 pages · 180 KB · PDS-Application

    Download Certificate of Appropriateness application form

Photos

  • Single page of context photos showing neighboring buildings to the north, across an alley, and to the south, across a side street.

    June 24, 2026 · 1 page · 7.0 MB · PDS-Maps and Drawings

    Download Context photos, set 01
  • Photo set showing the parking lot east of the building and the buildings to the south, west and east across the street, submitted with a Certificate of Appropriateness application.

    June 24, 2026 · 1 page · 7.7 MB · PDS-Maps and Drawings

    Download Context photos, parking lot and adjacent buildings
  • June 24, 2026 · 19 pages · 553 KB · PDS-Other Small Docs

    Download PDS-Other Small Docs - HISTORIC INVENTORY FORM
  • Photographs of the building's elevations, with the upload date and case number omitted; the scattered text fragments include a certificate of appropriateness reference.

    June 24, 2026 · 1 page · 7.6 MB · PDS-Photos

    Download Building photos showing south, north, east and west elevations

Other documents

  • Noticing radius map

    Aug. 26, 2026 · 526 KB · PDS-Maps and Drawings

  • Manufacturer's product data for an 18-inch asphalt-saturated organic shake underlayment (ASTM D 226 Type II), covering uses, features and packaging.

    June 24, 2026 · 1 page · 549 KB · PDS-Other Small Docs

    Download Roofing felt product information sheet
  • Manufacturer product information sheet describing shingle grades, dimensions, recommended roof and wall uses, and exposure tables.

    June 24, 2026 · 2 pages · 1.3 MB · PDS-Other Small Docs

    Download Red Cedar Shingles product grade specifications
  • Vendor quote listing replacement window units, sizes, locations, and pricing for the project, with energy performance values (U-factor, SHGC) and Energy Star status.

    June 24, 2026 · 12 pages · 251 KB · PDS-Other Small Docs

    Download Window product quote and specifications
  • Statement of legal interest

    June 24, 2026 · 48 KB · PDS-Statement of Legal Interest

  • Submittal checklist

    June 24, 2026 · 891 KB · PDS-Submittal Checklist

  • Agency transmittal

    June 24, 2026 · 130 KB · PDS-Transmittal Agencies

  • Receipt

    June 22, 2026 · 135 KB · PDS-Receipts

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