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Zoning certificate · Planning application

Approved: 578-square-foot attached backyard unit for aging family member

The city administratively approved an attached accessory dwelling unit on the street side of an existing single-family home, with conditions on a paved path, construction hours and outdoor lighting.

ApprovedCZC25-00216Filed Oct. 1, 2025Hillcrest · 4000 W Greenbrier Dr+1 related filing
Site plan for Approved: 578-square-foot attached backyard unit for aging family member
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

Annie Roe received administrative approval to build an attached accessory dwelling unit at 4000 W Greenbrier Drive in Boise, in an R-1C residential zone. The one-bedroom, one-bathroom unit would be 578 square feet and sits on the street side of the existing single-family home.

Attached ADU

Project name on file: 4000 W GREENBRIER DR

Timeline

  1. Dec. 6, 2025

    Appeal Period: Completed

  2. Nov. 25, 2025

    Review Complete: Completed

  3. Nov. 25, 2025

    Current Planning: Complete

  4. Oct. 28, 2025

    Current Planning: In Review

  5. Oct. 28, 2025

    Assign Reviewers: Completed

  6. Oct. 16, 2025

    Fee Payment: Payment Received

  7. Oct. 16, 2025

    Prescreen Review: Passed

  8. Oct. 16, 2025

    Prescreen Review: In Progress

  9. Oct. 16, 2025

    Prescreen Review: Corrections Required

  10. Oct. 13, 2025

    Prescreen Review: In Progress

  11. Oct. 1, 2025

    Application Submittal: ePlanReview

  12. Oct. 1, 2025

    Application filed

Documents

Site plans

  • Site plan sheet showing project data for a 578 sq ft addition to an existing 1,492 sq ft residence, with general notes, design criteria and code references.

    Oct. 30, 2025 · 1 page · 842 KB · PDS-Maps and Drawings

    Download Site plan for residence addition and accessory structure

Plans

  • Elevation drawings for a proposed accessory dwelling unit beside an existing residence, showing front and left views, preliminary and existing conditions, and lap siding to match the house.

    Oct. 30, 2025 · 1 page · 691 KB · PDS-Maps and Drawings

    Download Accessory dwelling unit elevations
  • Floor plan for a residence addition showing a new 578 sq ft accessory dwelling unit with bedroom, bath, lounge and garage, with construction notes marked preliminary and not for construction.

    Oct. 30, 2025 · 1 page · 119 KB · PDS-Maps and Drawings

    Download Proposed floor plan with addition

Project narrative

  • Applicants describe a 578 sq. ft. attached ADU for an aging family member, stating it meets setback, height and coverage rules and requests no variances.

    Oct. 30, 2025 · 1 page · 190 KB · PDS-Letter of Intent

    Download Letter of intent for attached accessory dwelling unit

Decisions

  • Letter approving an attached 578-square-foot, one-bedroom accessory dwelling unit under the zoning certificate, with findings of fact under the ADU code section.

    Nov. 25, 2025 · 6 pages · 180 KB · PDS-Action Letter

    Download Administrative approval letter for accessory dwelling unit

Notices

  • City notice that staff approved a zoning certificate for an attached accessory dwelling unit on the street side of an existing dwelling, with appeal information.

    Nov. 21, 2025 · 2 pages · 750 KB · PDS-Legal Notice

    Download Notice of approval for zoning certificate

Application

Photos

  • Photographs of the site taken on Oct. 16, 2025, filed with the zoning certificate application.

    Oct. 30, 2025 · 1 page · 309 KB · PDS-Photos

    Download Site photos

Correspondence

  • ACHD reports no required street improvements and lists conditions: traffic impact fee, driveway approach permit, right-of-way permits, and standard conditions on irrigation, utilities and sidewalks.

    Nov. 18, 2025 · 3 pages · 190 KB · PDS-Agency Comments

    Download Ada County Highway District comments
  • Boise Fire Department reports no comments on the zoning certificate application, noting that building code requirements will apply and are best addressed at building permit stage.

    Nov. 18, 2025 · 1 page · 152 KB · PDS-Agency Comments

    Download Fire Department agency comments
  • Boise Parks and Recreation and Community Forestry note a mature tree may need removal, encourage replanting a new two-inch tree, and require coordination before building permit submittal if public trees are affected.

    Nov. 18, 2025 · 1 page · 59 KB · PDS-Agency Comments

    Download Parks and Recreation agency comments
  • Public Works states the property must connect to central sanitary sewer, which is available in the adjacent street, and notes sewer capacity fees may apply at building permit.

    Nov. 18, 2025 · 1 page · 41 KB · PDS-Agency Comments

    Download Sewer agency comments
  • Public Works street light trades supervisor reports no comments on the zoning certificate application.

    Nov. 18, 2025 · 1 page · 125 KB · PDS-Agency Comments

    Download Street light agency comments
  • Irrigation agency states no its facilities lie on the property, but it holds a valid water right, and neighboring irrigation ditches crossing the property must stay unobstructed and protected by easement.

    Nov. 10, 2025 · 2 pages · 242 KB · PDS-Agency Comments

    Download Boise Project Board of Control agency comments
  • Veolia Water Idaho reports water pressure and flow available for fire sprinkler design at the site, to be attached to architectural plan sets.

    Oct. 30, 2025 · 1 page · 131 KB · PDS-Other Small Docs

    Download Veolia Water fire flow information

Other documents

  • Noticing radius map

    Nov. 21, 2025 · 631 KB · PDS-Maps and Drawings

  • Transmittal to agencies

    Oct. 31, 2025 · 99 KB · PDS-Transmittal Agencies

  • Statement of legal interest

    Oct. 30, 2025 · 161 KB · PDS-Statement of Legal Interest

  • Receipt

    Oct. 16, 2025 · 135 KB · PDS-Receipts

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