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Zoning certificate · Planning application

570-square-foot detached backyard home approved with conditions

The one-story, one-bedroom accessory dwelling would sit behind an existing single-family house and stand about 16 feet 3 inches tall. Conditions require matching design, a paved path at least 4 feet wide to the street and on-site drainage.

ApprovedCZC26-00121Filed June 16, 2026Depot Bench · 2316 W Frederic St+1 related filing
Site plan for 570-square-foot detached backyard home approved with conditions
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

The city approved a one-story, one-bedroom detached accessory dwelling unit of 570 square feet at 2316 W Frederic St in Boise. It would be built behind an existing single-family house and be about 16 feet 3 inches tall.

Detached ADU.

Project name on file: 2316 W FREDERIC ST

Timeline

  1. Aug. 18, 2026

    Appeal Period: Completed

  2. Aug. 7, 2026

    Review Complete: Completed

  3. Aug. 7, 2026

    Planning and Zoning: Complete

  4. July 22, 2026

    Planning and Zoning: In Review

  5. July 22, 2026

    Assign Reviewers: Completed

  6. July 13, 2026

    Fee Payment: Payment Received

  7. July 10, 2026

    Prescreen Review: Passed

  8. July 9, 2026

    Prescreen Review: In Progress

  9. July 8, 2026

    Prescreen Review: Corrections Required

  10. July 8, 2026

    Prescreen Review: In Progress

  11. June 29, 2026

    Prescreen Review: Corrections Required

  12. June 26, 2026

    Prescreen Review: In Progress

  13. June 22, 2026

    Prescreen Review: Corrections Required

  14. June 22, 2026

    Prescreen Review: In Progress

  15. June 17, 2026

    Application Submittal: ePlanReview

  16. June 16, 2026

    Application filed

Documents

Site plans

  • Drawing sheet showing a proposed accessory dwelling unit's floor plan, site plan and exterior elevations, with a 570 sq ft living area and mini-split heating and cooling.

    July 30, 2026 · 1 page · 161 KB · PDS-Maps and Drawings

    Download Floor plans, site plan and elevations for proposed ADU

Project narrative

  • Applicant's detailed letter explaining a proposed accessory dwelling unit meant to complement the existing residence, stating it seeks no special entitlement.

    July 30, 2026 · 1 page · 14 KB · PDS-Letter of Intent

    Download Letter of intent for accessory dwelling unit

Decisions

Notices

Application

  • Application for a zoning certificate for a detached accessory dwelling unit in the R-1C zone, with the applicant listed as the property owner and a submittal checklist.

    July 30, 2026 · 3 pages · 208 KB · PDS-Application

    Download Zoning certificate application for accessory dwelling unit
  • Application for a detached accessory dwelling unit on an R-1C zoned residential lot, with a submittal checklist for site plan, elevations and photos.

    June 17, 2026 · 3 pages · 205 KB · PDS-Application

    Download Zoning certificate application for accessory dwelling unit

Photos

  • Seven photos of the proposed accessory dwelling unit site and the existing house and backyard, taken from the surrounding streets on July 13, 2026.

    July 30, 2026 · 7 pages · 6.5 MB · PDS-Photos

    Download Site photos for proposed ADU

Correspondence

  • ACHD reports no required street improvements and lists fees, driveway approach permits, right-of-way permits and standard conditions of approval for the accessory dwelling unit application.

    Aug. 7, 2026 · 3 pages · 160 KB · PDS-Agency Comments

    Download Ada County Highway District comments
  • Building Department review notes that eaves on the ADU and existing home may violate fire-resistant construction and projection setback rules, and that this is not a complete plan review.

    Aug. 7, 2026 · 1 page · 67 KB · PDS-Agency Comments

    Download Building Department comments on zoning certificate
  • Public Works hillside and drainage review requiring an approved stormwater management plan before a building or grading permit is issued.

    Aug. 7, 2026 · 1 page · 134 KB · PDS-Agency Comments

    Download Public Works drainage comments
  • The Boise Fire Department has no comments on the zoning certificate review, noting that building code requirements will apply and are best addressed at the building permit stage.

    Aug. 7, 2026 · 1 page · 151 KB · PDS-Agency Comments

    Download Boise Fire Department comments
  • Boise Project Board of Control letter stating no district facilities lie on the property, though it holds a valid water right, and that crossing ditches must stay unobstructed with easements.

    Aug. 7, 2026 · 2 pages · 171 KB · PDS-Agency Comments

    Download Irrigation district agency comments on zoning certificate
  • Boise Parks and Recreation, with Community Forestry, asks the applicant to clarify whether any mature trees in the rear yard will be removed for a proposed accessory dwelling unit.

    Aug. 7, 2026 · 1 page · 62 KB · PDS-Agency Comments

    Download Parks and Recreation comments on tree removal
  • Public Works requires connection to the central sanitary sewer, notes possible sewer capacity fees at building permit issuance, and conditions final sewer plan approval.

    Aug. 7, 2026 · 1 page · 65 KB · PDS-Agency Comments

    Download Public Works sewer comments
  • Veolia requires a separate water service and meter for the new ADU structure and asks that a site plan be submitted to its engineering department for review.

    Aug. 7, 2026 · 1 page · 207 KB · PDS-Agency Comments

    Download Veolia Water Idaho comments
  • Veolia Water Idaho reports available water pressure and flow at a nearby hydrant for fire sprinkler design, to be attached to architectural plan sets.

    July 30, 2026 · 1 page · 113 KB · PDS-Other Small Docs

    Download Veolia Water fire flow availability letter

Other documents

  • Noticing radius map

    Aug. 5, 2026 · 531 KB · PDS-Maps and Drawings

  • Statement of legal interest

    July 30, 2026 · 105 KB · PDS-Statement of Legal Interest

  • Transmittal to agencies

    July 30, 2026 · 132 KB · PDS-Transmittal Agencies

  • Receipt

    July 13, 2026 · 131 KB · PDS-Receipts

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