Variance · Planning application
Variance lets two-story home and ADU on 0.21-acre lot in Ada County
The county approved reduced setbacks and extra lot coverage for a two-story house with an attached garage and a future detached garage with an accessory dwelling unit, totaling 3,321 square feet. The decision was made Jan. 14 by the Board of County Commissioners, with conditions barring private access to adjoining…
From the filing
The application's description as it appears in Ada County's record. See the official record
The applicant is asking for a variance to build a two-story single-family home with an attached garage, plus a future detached garage with an accessory dwelling unit, on a 0.21-acre strip of land at the northeast corner of W. Prairie Road and N. Horseshoe Bend Road in Boise. Because the strip is only about 39 feet deep, the request would reduce the front setback from 25 feet to 10 feet, the rear setback from 20 feet to 3 feet, and allow lot coverage of 29.5% instead of the 20% limit. The combined structures total 3,321 square feet.
An application for a variance for a single-family dwelling and a future accessory structure with an ADU on a nonconforming parcel to encroach into the front and rear yard setbacks and to exceed the maximum lot coverage. The property is located at the intersection of W. Prairie and N. Horseshoe Bend Road and contains 0.21 acres in the Estate Residential (R1) District; Section 11, T. 4N, R. 1E.
Timeline
Jan. 14, 2026
Ada County staff recommended approval
Jan. 14, 2026
Approved
Ada County Board of County Commissioners: Approved.
Jan. 14, 2026
Public hearing: Ada County Board of County Commissioners
Jan. 9, 2026
Document added: Memo (Board of County Commissioners, Jan 14, 2026)
Jan. 7, 2026
Document added: Staff report (Board of County Commissioners, Jan 14, 2026)
Jan. 7, 2026
Document added: Findings (Board of County Commissioners, Jan 14, 2026)
Nov. 7, 2025
Application filed
Documents
Staff reports
- Download Staff memo adding sign posting certification exhibit
Ada County staff memo to the Board of County Commissioners transmitting Exhibit 28, a sign posting certification form with photos, submitted after the staff report for a variance application.
Jan. 9, 2026 · 4 pages · 6.4 MB · Staff Memo
- Download Staff report for variance request before county commissioners
Ada County staff report for a variance allowing a single-family dwelling and future ADU on a 0.21-acre nonconforming strip parcel, reducing setbacks and exceeding lot coverage.
Jan. 7, 2026 · 66 pages · 8.3 MB · Staff Report
Decisions
- Download Findings of fact, conclusions of law and order
Board of Ada County Commissioners findings on a variance for a single-family dwelling and accessory structure with an ADU, covering procedural history and the record considered at the Jan. 14, 2026 hearing.
Jan. 7, 2026 · 8 pages · 280 KB · Findings