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Zoning certificate · Planning application

Conversion of backyard building into one-bedroom accessory dwelling approved

City planners approved turning an existing 432-square-foot detached building into a one-story, one-bedroom rental-style unit behind a single-family home. Conditions include a paved path at least 4 feet wide to the entrance and drainage contained on site.

ApprovedCZC26-00132Filed May 26, 2026Hillcrest · 2620 S Hayden Way+1 related filing
Site plan for Conversion of backyard building into one-bedroom accessory dwelling 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

The applicant plans to convert an existing 432 square foot detached accessory building into a one-story, one-bedroom, one-bathroom accessory dwelling unit behind the single-family home at 2618 S Hayden Way in Boise. The city's planning department approved the request administratively in an R-1C residential zone.

ADU

Project name on file: 2618 S HAYDEN WAY - ADU

Timeline

  1. Aug. 25, 2026

    Appeal Period: Completed

  2. Aug. 14, 2026

    Review Complete: Completed

  3. Aug. 14, 2026

    Planning and Zoning: Complete

  4. Aug. 14, 2026

    Planning and Zoning: In Review

  5. Aug. 14, 2026

    Assign Reviewers: Completed

  6. Aug. 6, 2026

    Review Complete: Corrections Required

  7. Aug. 6, 2026

    Planning and Zoning: Corrections Required

  8. July 22, 2026

    Planning and Zoning: In Review

  9. July 22, 2026

    Assign Reviewers: Completed

  10. July 16, 2026

    Fee Payment: Payment Received

  11. July 13, 2026

    Prescreen Review: Passed

  12. July 10, 2026

    Prescreen Review: In Progress

  13. July 2, 2026

    Prescreen Review: Corrections Required

  14. July 1, 2026

    Prescreen Review: In Progress

  15. June 16, 2026

    Application Submittal: ePlanReview

    Sending per Contact Update

  16. May 26, 2026

    Application filed

Documents

Site plans

  • Site plan showing a proposed 432 square foot accessory dwelling unit beside the existing house, with dimensions, utility area, and property lines.

    Aug. 13, 2026 · 1 page · 828 KB · PDS-Maps and Drawings

    Download Site plan, version 2
  • Proposed site layout showing a detached office and bedroom addition, lot impervious coverage of 30.6%, and general grading and drainage notes.

    July 24, 2026 · 1 page · 2.2 MB · PDS-Maps and Drawings

    Download Site plan with permeable area calculations

Plans

  • Floor plan drawing for the proposed residence, showing room dimensions, bathroom, living room, kitchen, bedroom and a crawl space access.

    Aug. 13, 2026 · 1 page · 3.3 MB · PDS-Maps and Drawings

    Download Floor plan, version 2
  • Exterior elevation drawings for a zoning certificate showing roofing, siding, trim, ceiling height and grade details, with general drawing notes.

    July 24, 2026 · 1 page · 2.1 MB · PDS-Maps and Drawings

    Download Building elevations (right, rear, left and approach sides)
  • Floor plan and roof plan sheets with wall, framing, roofing and plan notes, filed under a zoning certificate application.

    July 24, 2026 · 1 page · 2.6 MB · PDS-Maps and Drawings

    Download Proposed first floor plan and roof plan

Project narrative

  • Applicant's letter describing converting an existing 385-square-foot detached office into an ADU, with no footprint expansion, and citing Boise City Code approval findings.

    July 24, 2026 · 2 pages · 68 KB · PDS-Letter of Intent

    Download Letter of explanation for accessory dwelling unit conversion

Decisions

Notices

  • Notice that a zoning certificate was approved for construction of a detached accessory dwelling unit on a residential traditional zoned lot, with appeals due by August 24, 2026.

    Aug. 12, 2026 · 2 pages · 878 KB · PDS-Legal Notice

    Download Notice of approval for zoning certificate

Application

Photos

  • Photos of the office building from several sides, including one taken during construction and a note that the office was completed in August 2025.

    July 24, 2026 · 1 page · 2.0 MB · PDS-Photos

    Download Site photos of the office

Correspondence

  • Boise Parks and Recreation reviewed the plans with Community Forestry, has no comments, and notes no impact to existing mature trees on the site.

    Oct. 13, 2026 · 1 page · 58 KB · PDS-Agency Comments

    Download Parks and Recreation comments
  • Public Works states sewer connection to the central system is required, sewer is available in the street, and capacity fees may apply at building permit.

    Oct. 13, 2026 · 1 page · 66 KB · PDS-Agency Comments

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

    Oct. 13, 2026 · 1 page · 193 KB · PDS-Agency Comments

    Download Veolia Water Idaho comments on water service
  • Water supplier letter giving available pressure and flow at a nearby hydrant for fire sprinkler design, to be attached to the fire-reviewed and construction plan sets.

    July 24, 2026 · 1 page · 112 KB · PDS-Other Small Docs

    Download Veolia water fire flow availability letter

Other documents

  • Noticing radius map

    Aug. 12, 2026 · 538 KB · PDS-Maps and Drawings

  • Statement of legal interest

    July 24, 2026 · 89 KB · PDS-Statement of Legal Interest

  • Transmittal sheet

    July 24, 2026 · 137 KB · PDS-Transmittal Agencies

  • Receipt

    July 16, 2026 · 131 KB · PDS-Receipts

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