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Planning project · Planning application

Rear addition to historic 1895 Boise home approved

The owners' architect sought to replace a small rear addition with a larger two-level one of about 850 square feet, adding roughly 200 square feet to the footprint, and to remodel the first and second floors. The city approved the project administratively on Nov. 4.

ApprovedPLN25-00653Filed Aug. 4, 2025North End · 402 W Union St+1 related filing
Site plan for Rear addition to historic 1895 Boise home approved
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 application asks to tear down a small rear addition on an existing 1895 single-family home at 402 W Union Street in Boise and replace it with a larger two-level rear addition of about 850 square feet. The homeowners also plan to remodel the layouts of the existing first and second floors, and the expansion adds roughly 200 square feet to the home's footprint.

Addition in the Historic District

Project name on file: 402 W UNION ST

Timeline

  1. Nov. 4, 2025

    Planning Applications: Project Entitled

  2. Aug. 27, 2025

    Pending Application Submittal: Planning Applications in Review

  3. Aug. 20, 2025

    Concept Review Complete: CR Complete - Type 2

  4. Aug. 11, 2025

    Concept Review Complete: Corrections Required

    Please upload site photos of the addition to be removed, and elevations and floor plans of the new addition.

  5. Aug. 4, 2025

    Application Submittal: Online

  6. Aug. 4, 2025

    Application filed

Documents

Site plans

  • Site plan drawing with general construction notes, symbols for new building footprint, drive, landscaping, trees, and fencing, dated 8-4-2025 for entitlements.

    Aug. 4, 2025 · 1 page · 99 KB · PDS-Other Small Docs

    Download Basic site plan

Plans

  • Building elevation drawings for an addition, including north, south, and east views, with general notes and project issue information dated Aug. 4, 2025.

    Aug. 18, 2025 · 1 page · 494 KB · PDS-Other Small Docs

    Download Proposed elevations showing new rear addition
  • Architectural floor plan sheet with general construction notes on finishes, blocking, caulking and dust protection; the layout details are mostly illegible in the extracted text.

    Aug. 18, 2025 · 1 page · 149 KB · PDS-Other Small Docs

    Download Proposed floor plans

Project narrative

  • Advisory concept review notes for a proposed removal of a small addition and construction of a larger addition on a contributing historic home, with Certificate of Appropriateness - Minor required.

    Aug. 20, 2025 · 1 page · 444 KB · PDS-Concept Review Summary Report

    Download Concept review summary report

Decisions

  • Architect's letter describing a proposed demolition of a rear addition and construction of a larger two-story rear addition to a 1895 single-family home, plus interior remodeling.

    Aug. 4, 2025 · 1 page · 55 KB · PDS-Other Small Docs

    Download Letter of explanation for Certificate of Appropriateness

Application

  • Application for a single-family detached dwelling in the R-1C zone, filed by an architect's firm on behalf of the property owner.

    Aug. 4, 2025 · 2 pages · 154 KB · PDS-Application

    Download Planning project application form

Photos

  • Sheet A202 of the entitlements set, showing photographs of the existing site conditions; the page contains only the photo sheet and title block.

    Aug. 18, 2025 · 1 page · 7.1 MB · PDS-Other Small Docs

    Download Existing site photos

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