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Planning project · Planning application

Detached accessory dwelling unit approved for single-family lot

The city approved a one-bedroom, one-bath unit of under 500 square feet at the rear of a lot with an existing home of about 1,700 square feet. No added parking is required. Staff approved it July 8, 2026.

ApprovedPLN25-01089Filed Dec. 10, 2025Hillcrest · 3502 W Catalina Rd+1 related filing
Site plan for Detached accessory dwelling unit approved for single-family lot
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

Detached ADU

Project name on file: 3502 W CATALINA RD - ADU

Timeline

  1. Oct. 13, 2026

    6 documents added

  2. Feb. 27, 2026

    Planning Applications: Project Entitled

  3. Dec. 29, 2025

    Pending Application Submittal: Planning Applications in Review

  4. Dec. 29, 2025

    Concept Review Complete: CR Complete - Type 2

  5. Dec. 23, 2025

    Concept Review Complete: Notes

    Emailed for CR 12/23

  6. Dec. 10, 2025

    Application Submittal: Online

  7. Dec. 10, 2025

    Application filed

Documents

Site plans

  • Schematic site plan for a 500 sq ft, one-bedroom detached ADU alongside an existing single-family home, with zoning setbacks, height, area and parking notes.

    Dec. 10, 2025 · 1 page · 60 KB · PDS-Other Small Docs

    Download Site plan for proposed detached accessory dwelling unit

Plans

  • East, north, west and south elevation drawings for a proposed accessory dwelling unit, with notes on grading, cement board lap siding and slab and foundation details.

    Dec. 10, 2025 · 1 page · 71 KB · PDS-Other Small Docs

    Download Elevation views of proposed ADU
  • Single-page floor plan of a proposed accessory dwelling unit showing a living area of about 500 sq ft, with bedroom, bath, kitchen, closet and room dimensions labeled.

    Dec. 10, 2025 · 1 page · 246 KB · PDS-Other Small Docs

    Download Floor plan of proposed ADU

Project narrative

  • Staff notes on a proposed under-500 s.f. detached accessory dwelling unit, covering setbacks, height, walkway materials and design compatibility.

    Dec. 29, 2025 · 2 pages · 454 KB · PDS-Concept Review Summary Report

    Download Concept review summary for detached ADU
  • Early assistance concept review text describing a 500 square foot detached accessory dwelling unit at the rear of an existing single-family lot, with no added parking.

    Dec. 10, 2025 · 1 page · 12 KB · PDS-Other Small Docs

    Download Project address and description of proposed ADU

Application

  • Application form for a detached accessory dwelling unit (ADU) on an R-1C zoned residential parcel, to house the homeowner's aging mother.

    Dec. 10, 2025 · 2 pages · 158 KB · PDS-Application

    Download Planning project application form

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