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Variance · Planning application

Secondary dwelling above new garage approved within Boise River greenway buffer

The county commissioners heard the request May 7 and approved it with conditions. The two-story addition would replace a carport. The owner must record a deed restriction against separate sale, get retroactive permits for unpermitted structures and pay a traffic impact fee.

In review202500390Filed Feb. 28, 2025Ada County · 3155 W State St
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 Ada County's record. See the official record

The applicant wants to build a two-story addition on the north side of an existing house at 3155 W State St near Eagle. The ground floor would be a three-car garage, and the upper floor would be an approximately 1,070 square foot secondary dwelling with a 160 square foot covered deck. The house sits on a 16.92-acre property next to the Boise River and within the river greenway buffer, so a variance is needed.

Accessory Use and Variance to allow a Secondary Dwelling to encroach into the 100' setback of the Boise River Greenway Overlay District. The property is located at 3155 W State St and contains 16.92 acres in the Rural-Urban Transition (RUT) District; Sectopm 7, T.4N, R.1E.

Timeline

  1. May 7, 2025

    Ada County staff recommended approval

  2. May 7, 2025

    Public hearing: Ada County Board of County Commissioners

  3. April 29, 2025

    Document added: Staff report (Board of County Commissioners, May 7, 2025)

  4. April 29, 2025

    Document added: Draft findings (Board of County Commissioners, May 7, 2025)

  5. Feb. 28, 2025

    Application filed

Documents

Staff reports

  • Staff analysis of a variance request to build a two-story secondary dwelling addition in the Boise River Greenway Overlay, with the three required findings reviewed.

    April 29, 2025 · 63 pages · 24.3 MB · Staff Report

    Download Staff report for variance hearing

Decisions

  • Draft Board of County Commissioners findings for a variance application covering an attached secondary dwelling and garage addition, following the May 7, 2025 public hearing.

    April 29, 2025 · 11 pages · 1.2 MB · Findings

    Download Draft findings of fact, conclusions of law and order

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