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Planning project · Planning application

Third home proposed on lot with existing duplex, creating a triplex

The plan adds a garage with a roughly 1,335-square-foot dwelling above it to a 0.4-acre site that already has a duplex. It needs a major change to an earlier conditional use permit and is under review, with City Council as the deciding body.

In reviewPLN26-00346Filed April 14, 2026Veterans Park · 4101 W Plum St+2 related filings
Site plan for Third home proposed on lot with existing duplex, creating a triplex
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

CUP Major Mod for a Triplex

Project name on file: 4101 W PLUM ST

Timeline

  1. Aug. 20, 2026

    Pending Application Submittal: Planning Applications in Review

  2. July 22, 2026

    IDR Review Complete: IDR Waived

  3. July 22, 2026

    Neighborhood Meeting Review: Completed

  4. May 19, 2026

    Concept Review Complete: CR Complete - Type 3

  5. April 14, 2026

    Application Submittal: Online

  6. April 14, 2026

    Application filed

Documents

Site plans

Plans

  • Architectural sheets with first and second floor plans, square footage, and northeast, southeast, northwest and southwest building elevations for a three-unit building.

    April 14, 2026 · 2 pages · 540 KB · PDS-Other Small Docs

    Download Floor plans and elevations for new triplex

Project narrative

  • Advisory concept review summary for a proposed triplex addition to a site with an existing duplex, covering required applications, parking, sidewalk waiver and conditional use findings.

    July 22, 2026 · 3 pages · 461 KB · PDS-Concept Review Summary Report

    Download Concept review summary report
  • Advisory concept review summary for a proposed triplex with a garage level, covering required applications (conditional use permit modification and zoning certificate), parking, and sidewalk waiver.

    May 19, 2026 · 3 pages · 473 KB · PDS-Concept Review Summary Report

    Download Concept review summary report
  • Architect's letter describing a proposed three-unit building with a ground-floor garage, four parking spaces, cementitious siding, asphalt shingles, and retained mature trees.

    April 14, 2026 · 1 page · 70 KB · PDS-Other Small Docs

    Download Project description letter

Notices

  • Applicant's summary of a neighborhood meeting held 7/1/26 with no attendees, sharing site and landscape plans, and reporting no feedback received.

    July 7, 2026 · 10 pages · 3.2 MB · PDS-Other Small Docs

    Download Neighborhood meeting summary form

Application

  • Application for a triplex with a 1,580 sq. ft. garage on the first floor and 1,335 sq. ft. of living space above, in the R-2 zone, filed by 7/28 Architecture.

    April 14, 2026 · 2 pages · 158 KB · PDS-Application

    Download Planning project application form

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