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Detached one-bedroom backyard unit of up to 500 square feet approved

City planners approved the zoning certificate on Feb. 27 for a detached accessory dwelling unit with one bedroom and one bathroom. It would sit on a 0.18-acre lot with an existing 1,672-square-foot home, and no added parking is required.

ApprovedPLN26-00002Filed Jan. 3, 2026Winstead Park · 2010 N Allumbaugh St+1 related filing
Site plan for Detached one-bedroom backyard unit of up to 500 square feet 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

Detached ADU

Project name on file: 2010 N ALLUMBAUGH ST - ADU

Timeline

  1. Oct. 13, 2026

    5 documents added

  2. Feb. 27, 2026

    Planning Applications: Project Entitled

  3. Jan. 21, 2026

    Pending Application Submittal: Planning Applications in Review

  4. Jan. 21, 2026

    Concept Review Complete: CR Complete - Type 2

  5. Jan. 16, 2026

    Concept Review Complete: Corrections Required

    Please upload a simple site plan showing the proposed location for the ADU as well as the dimensions of the proposed structure. Once this is uploaded, I will review and reach out to schedule a Concept Review meeting. Thank you.

  6. Jan. 16, 2026

    Concept Review Complete: Notes

    REceived site plan, emailed for CR 1/16

  7. Jan. 3, 2026

    Application Submittal: Online

  8. Jan. 3, 2026

    Application filed

Documents

Site plans

  • One-page site plan marking the approximate location of an accessory dwelling unit, noted as under 500 square feet.

    Jan. 16, 2026 · 1 page · 59 KB · PDS-Other Small Docs

    Download Site plan with rough location of ADU

Plans

  • Preliminary floor plan drawing with dimension callouts; the extracted text is mostly dimension figures and an export label, so details are limited.

    Jan. 16, 2026 · 1 page · 61 KB · PDS-Other Small Docs

    Download Rough draft floor plan with sizing

Project narrative

  • Planning staff notes on a proposed 500 sq ft detached ADU, covering required zoning certificate, setback encroachments, gross floor area measurement, and a required 5 ft pathway.

    Jan. 21, 2026 · 2 pages · 455 KB · PDS-Concept Review Summary Report

    Download Concept review summary for accessory dwelling unit

Application

  • Application to build a backyard accessory dwelling unit under 500 sq. ft. for aging parents, possibly later offered as a long-term affordable rental.

    Jan. 3, 2026 · 2 pages · 159 KB · PDS-Application

    Download Planning application for accessory dwelling unit

Photos

  • A single image illustrating the style of exterior finishes the applicant would like to use on the accessory dwelling unit.

    Jan. 3, 2026 · 1 page · 281 KB · PDS-Other Small Docs

    Download Picture of an ADU showing proposed finishes

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