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Planning project · Planning application

749-square-foot attached accessory dwelling unit approved for single-family home

The city approved plans on Oct. 13 for a single-story attached unit beside an existing house, meant for visiting extended family. No changes to parking are proposed, and the review was handled administratively.

ApprovedPLN26-00373Filed April 20, 2026Southwest Boise · 2551 S Sumpter Way+1 related filing
Site plan for 749-square-foot attached accessory dwelling unit approved for single-family home
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

749SF attached ADU

Project name on file: 2551 S SUMPTER WAY - CZC (ADU)

Timeline

  1. Oct. 14, 2026

    Status changed from In review to Approved

    Reported as “Project Entitled”.

  2. Oct. 13, 2026

    Approved

  3. Aug. 14, 2026

    Planning Applications: Project Entitled

  4. April 27, 2026

    Pending Application Submittal: Planning Applications in Review

  5. April 27, 2026

    Concept Review Complete: CR Complete - Type 2

  6. April 20, 2026

    Application Submittal: Online

  7. April 20, 2026

    Application filed

Documents

Site plans

  • Site plan showing the existing main residence and a proposed 749 sq ft accessory dwelling unit (ADU), with property lines and zoning R-1A noted.

    April 20, 2026 · 1 page · 750 KB · PDS-Other Small Docs

    Download Proposed site plan

Plans

  • Floor plan at 1/4 inch scale showing a 749 square foot proposed ADU with bedroom, bath, kitchen, dining, living area, utility closet and flex space.

    April 20, 2026 · 1 page · 466 KB · PDS-Other Small Docs

    Download Proposed floor plan for accessory dwelling unit

Project narrative

  • Planner's advisory notes on a proposed 749 sq ft attached accessory dwelling unit, covering setbacks, front door placement, sidewalk design and floodplain status.

    May 5, 2026 · 2 pages · 465 KB · PDS-Concept Review Summary Report

    Download Concept review summary for accessory dwelling unit
  • Planner's advisory summary of a proposed 749 sq ft attached ADU, covering setbacks, front door placement, sidewalk design, and floodplain status.

    April 27, 2026 · 2 pages · 465 KB · PDS-Concept Review Summary Report

    Download Concept review summary for attached accessory dwelling unit
  • Narrative describing a 749 sq ft single-story attached ADU for extended family, with no added parking, one fence removed, and no trees removed.

    April 20, 2026 · 1 page · 159 KB · PDS-Other Small Docs

    Download Project description for attached accessory dwelling unit

Application

  • Application for an attached accessory dwelling unit (ADU) intended for family visits, filed by the applicant on behalf of the property owner in the R-1A zone.

    April 20, 2026 · 2 pages · 158 KB · PDS-Application

    Download Planning project application form

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