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Zoning certificate · Planning application

Two-story house with 900-square-foot apartment over garage approved with conditions

The city approved a new 2,788-square-foot house with a two-bedroom accessory dwelling above its three-car garage, replacing an older home. Conditions include a paved walkway to the unit, on-site drainage and resolving an irrigation easement before a building permit.

ApprovedCZC26-00142Filed June 29, 2026Southeast Boise · 506 W Highland St+2 related filings
Site plan for Two-story house with 900-square-foot apartment over garage 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 900-square-foot accessory dwelling unit (a small second home) above the attached garage of a new two-story, 2,788-square-foot single-family house at 506 W Highland Street. The unit has two bedrooms and two baths, with an exterior stair and uncovered deck at the rear of the house. The building is about 31 feet tall.

Minor modifications of approved building elevations and landscaping

Project name on file: 506 W HIGHLAND ST - Minor Mod

Timeline

  1. Aug. 29, 2026

    Appeal Period: Completed

  2. Aug. 19, 2026

    Review Complete: Completed

  3. Aug. 18, 2026

    Review Complete: Completed

  4. Aug. 18, 2026

    Planning and Zoning: Complete

  5. Aug. 3, 2026

    Planning and Zoning: In Review

  6. Aug. 3, 2026

    Assign Reviewers: Completed

  7. July 29, 2026

    Review Complete: Corrections Required

  8. July 29, 2026

    Planning and Zoning: Corrections Required

  9. July 22, 2026

    Planning and Zoning: In Review

  10. July 22, 2026

    Assign Reviewers: Completed

  11. July 14, 2026

    Fee Payment: Payment Received

  12. July 13, 2026

    Prescreen Review: Passed

  13. July 13, 2026

    Prescreen Review: In Progress

  14. June 29, 2026

    Application Submittal: ePlanReview

  15. June 29, 2026

    Application filed

Documents

Site plans

  • Preliminary site plan sheet A0.1 showing setbacks, an ADU space above the garage, and general site and grading notes for the builder.

    July 23, 2026 · 1 page · 571 KB · PDS-Maps and Drawings

    Download Site plan with grading and setback notes

Plans

  • Revised elevation drawings for the west, south, east and north sides of the building, with floor and roof heights, marked as a permit set.

    Aug. 3, 2026 · 2 pages · 600 KB · PDS-Maps and Drawings

    Download Revised building elevations
  • Revised floor plans dated Aug. 3, 2026, with square footage totals for the main house, ADU and garage, plus general framing, fire-separation and glazing notes.

    Aug. 3, 2026 · 2 pages · 267 KB · PDS-Maps and Drawings

    Download Revised floor plans
  • Preliminary, not-for-construction elevation drawings for an accessory dwelling unit, showing west, south, east and north elevations with floor levels and roof height.

    July 23, 2026 · 2 pages · 1.1 MB · PDS-Maps and Drawings

    Download Building elevations, sheets A2.0 and A2.1
  • Main floor and upper floor plans with square footage totals for the main house, a 900 sq. ft. ADU and a 923 sq. ft. garage, marked preliminary and not for construction.

    July 23, 2026 · 1 page · 675 KB · PDS-Maps and Drawings

    Download Floor plans for main house, garage and ADU
  • Landscape notes covering topsoil requirements, plant material standards, plant count rules and planting bed mulch specifications for the site.

    July 23, 2026 · 2 pages · 2.0 MB · PDS-Maps and Drawings

    Download Landscape plans and topsoil notes
  • Detail sheet with cedar board fence elevations, post and footing specifications, and steel bollard installation notes, prepared by Rodney Evans + Partners.

    July 23, 2026 · 1 page · 517 KB · PDS-Other Small Docs

    Download Fence and bollard construction details

Project narrative

  • Applicant's letter requesting a minor CUP modification to replace an existing home on one lot with a new single-family home with an ADU above a three-car garage, with minor landscape revisions.

    July 23, 2026 · 1 page · 189 KB · PDS-Letter of Intent

    Download Letter of explanation for minor CUP modification and zoning certificate

Decisions

Notices

Application

  • Application for a zoning certificate for an 900 sq ft accessory dwelling unit with two bedrooms, described as minor modifications of approved building elevations and landscaping.

    June 29, 2026 · 3 pages · 206 KB · PDS-Application

    Download Zoning certificate application for accessory dwelling unit

Photos

  • A 27-page set of photographs filed with the zoning certificate application; the extracted text contains only the date and case stamp on each page, so the images' subjects are not described.

    July 23, 2026 · 27 pages · 5.4 MB · PDS-Photos

    Download Site photographs

Correspondence

  • ACHD letter finding no required street improvements, listing traffic impact fee, driveway approach permit, and right-of-way conditions for the applicant.

    Aug. 18, 2026 · 3 pages · 183 KB · PDS-Agency Comments

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

    Aug. 18, 2026 · 1 page · 193 KB · PDS-Agency Comments

    Download Fire Department comments
  • Boise Parks and Recreation and Community Forestry report no comments or recommendations on the proposed demolition and rebuild of a single-family home.

    Aug. 18, 2026 · 1 page · 576 KB · PDS-Agency Comments

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

    Aug. 18, 2026 · 1 page · 65 KB · PDS-Agency Comments

    Download Public Works sewer comments
  • Veolia Water Idaho provides water pressure and flow available at a nearby hydrant for fire sprinkler design, under maximum-day conditions.

    July 23, 2026 · 1 page · 112 KB · PDS-Other Small Docs

    Download Veolia fire flow information

Other documents

  • Noticing radius map

    Aug. 14, 2026 · 678 KB · PDS-Maps and Drawings

  • Transmittal to agencies

    July 28, 2026 · 133 KB · PDS-Transmittal Agencies

  • Statement of legal interest

    July 23, 2026 · 256 KB · PDS-Statement of Legal Interest

  • ADU submittal checklist

    July 23, 2026 · 856 KB · PDS-Submittal Checklist

  • Receipt

    July 14, 2026 · 131 KB · PDS-Receipts

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