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Zoning certificate · Planning application

500-square-foot apartment above a new garage proposed to replace detached garage

The plan removes an existing detached garage and builds a two-story rear structure with a 500-square-foot garage below and a 500-square-foot accessory dwelling unit above. The existing house would stay. The application is under administrative review.

In reviewCZC26-00254Filed Sept. 1, 2026Southeast Boise · 1846 S Colorado Ave+1 related filing
Site plan for 500-square-foot apartment above a new garage proposed to replace detached garage
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

ADU

Project name on file: 1846 S COLORADO AVE - ADU

Timeline

  1. Two days ago

    Document added: PDS-Maps and Drawings - NOTICING RADIUS MAP

  2. Two days ago

    Document added: PDS-Legal Notice - PZ_ADMINISTRATIVE LEGAL NOTICE

  3. Oct. 14, 2026

    18 documents added

  4. Oct. 14, 2026

    Status changed from On hold to In review

    Reported as “In Review”.

  5. Oct. 14, 2026

    Planning and Zoning: In Review

  6. Oct. 14, 2026

    Assign Reviewers: Completed

  7. Oct. 12, 2026

    Review Complete: Corrections Required

  8. Oct. 12, 2026

    Planning and Zoning: Corrections Required

  9. Sept. 27, 2026

    Planning and Zoning: In Review

  10. Sept. 27, 2026

    Assign Reviewers: Completed

  11. Sept. 15, 2026

    Fee Payment: Payment Received

  12. Sept. 14, 2026

    Prescreen Review: Passed

  13. Sept. 10, 2026

    Prescreen Review: In Progress

  14. Sept. 10, 2026

    Prescreen Review: Corrections Required

  15. Sept. 9, 2026

    Prescreen Review: In Progress

  16. Sept. 9, 2026

    Application Submittal: ePlanReview

    Manually created ePlan case after failing to advance WF.

  17. Sept. 1, 2026

    Application filed

Documents

Site plans

  • Cover sheet, site plan and 3D perspective views for a detached 500 sq. ft. garage with a 500 sq. ft. accessory dwelling unit above, with energy compliance notes under IECC 2018.

    Oct. 14, 2026 · 1 page · 3.8 MB · PDS-Maps and Drawings

    Download Site plan, cover sheet and perspective views
  • Combined cover sheet with planning and site information for a detached 500 sq. ft. garage with an ADU above, plus a perspective view and an energy compliance table under IECC 2018.

    Sept. 28, 2026 · 1 page · 3.7 MB · PDS-Maps and Drawings

    Download Site plan, perspective and cover sheet

Plans

  • Architectural elevation drawings with general notes, dimensions, window and door schedules, and a revision table, for a zoning certificate application.

    Sept. 28, 2026 · 1 page · 350 KB · PDS-Maps and Drawings

    Download Elevations sheet, dated 9/15/2026
  • Floor plan sheets for a 500 sq ft garage and 500 sq ft accessory dwelling unit, with a revision table and drawing scale notes from the drawing set.

    Sept. 28, 2026 · 2 pages · 547 KB · PDS-Maps and Drawings

    Download Floor plans for garage and ADU, sheets A1.1 and A1.2

Project narrative

  • Owner's representative describes replacing a detached garage with a two-story structure holding a 500 sq ft garage and a 500 sq ft accessory dwelling unit, with no variances requested.

    Sept. 28, 2026 · 2 pages · 124 KB · PDS-Letter of Intent

    Download Letter of explanation for garage and ADU project

Notices

  • Notice that a zoning certificate was approved for a detached accessory structure over 1,000 square feet with a two-car garage and a second-story accessory dwelling unit; appeals are due by October 30, 2026.

    Two days ago · 2 pages · 882 KB · PDS-Legal Notice

    Download Notice of administrative approval

Application

Photos

  • Two pages of site photographs filed with the Zoning Certificate application; the text layer is garbled and shows no readable captions.

    Sept. 28, 2026 · 2 pages · 3.2 MB · PDS-Maps and Drawings

    Download Site photos

Correspondence

  • Boise Fire Department recommends approval subject to a heat detector in the garage beneath the ADU, interconnected with the ADU smoke alarms, plus standard access and hydrant requirements.

    Oct. 14, 2026 · 1 page · 194 KB · PDS-Agency Comments

    Download Fire Department agency comments
  • ACHD reports no street improvements are required and lists fees, driveway approach permit, right-of-way permit and standard conditions for an accessory dwelling unit application.

    Oct. 12, 2026 · 3 pages · 190 KB · PDS-Agency Comments

    Download Ada County Highway District comments
  • Fire Department recommends approval subject to installing a heat detector in the garage beneath the ADU, interconnected with the ADU smoke alarms, plus standard hydrant and access requirements.

    Oct. 8, 2026 · 1 page · 193 KB · PDS-Agency Comments

    Download Fire Department agency comments
  • Boise Parks and Recreation asks whether a mature rear-boundary tree, not shown on the plans, will be retained or removed, and recommends replanting if removed.

    Oct. 8, 2026 · 1 page · 58 KB · PDS-Agency Comments

    Download Parks and Recreation agency comments
  • Public Works sewer review stating the property must connect to central sanitary sewer, which is available in the adjacent alley, and noting possible sewer capacity fees at building permit.

    Oct. 8, 2026 · 1 page · 65 KB · PDS-Agency Comments

    Download Sewer agency comments
  • Veolia Water requires a separate water service line and meter for the proposed accessory dwelling unit and asks that a site plan be submitted for review.

    Oct. 8, 2026 · 1 page · 211 KB · PDS-Agency Comments

    Download Veolia Water Idaho comments on water service needs
  • Water company letter reporting available system pressure and flow at a nearby hydrant for fire sprinkler design, to be attached to approved plan sets.

    Sept. 28, 2026 · 1 page · 112 KB · PDS-Other Small Docs

    Download Veolia fire flow information

Other documents

  • Noticing radius map

    Two days ago · 536 KB · PDS-Maps and Drawings

  • Transmittal sheet

    Oct. 2, 2026 · 137 KB · PDS-Transmittal Agencies

  • Statement of legal interest

    Sept. 28, 2026 · 187 KB · PDS-Statement of Legal Interest

  • Receipt

    Sept. 15, 2026 · 131 KB · PDS-Receipts

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