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.

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
Aug. 29, 2026
Appeal Period: Completed
Aug. 19, 2026
Review Complete: Completed
Aug. 18, 2026
Review Complete: Completed
Aug. 18, 2026
Planning and Zoning: Complete
Aug. 3, 2026
Planning and Zoning: In Review
Aug. 3, 2026
Assign Reviewers: Completed
July 29, 2026
Review Complete: Corrections Required
July 29, 2026
Planning and Zoning: Corrections Required
July 22, 2026
Planning and Zoning: In Review
July 22, 2026
Assign Reviewers: Completed
July 14, 2026
Fee Payment: Payment Received
July 13, 2026
Prescreen Review: Passed
July 13, 2026
Prescreen Review: In Progress
June 29, 2026
Application Submittal: ePlanReview
June 29, 2026
Application filed
Documents
Site plans
- Download Site plan with grading and setback notes
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
Plans
- Download Revised building elevations
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 floor plans
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 Building elevations, sheets A2.0 and A2.1
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 Floor plans for main house, garage and ADU
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 Landscape plans and topsoil notes
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 Fence and bollard construction details
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
Project narrative
- Download Letter of explanation for minor CUP modification and zoning certificate
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
Decisions
- Download Zoning certificate approval letter for accessory dwelling unit
Action letter approving a 900 sq ft ADU over a garage in a new detached house, conditioned on vacating an irrigation easement before building permit issuance.
Aug. 18, 2026 · 10 pages · 222 KB · PDS-Action Letter
Notices
- Download Notice of approval for conditional use modification and accessory dwelling unit
Approval notice for a landscape plan modification, revised building elevations, and a new single-family house with an accessory dwelling unit; appeals due by Aug. 28, 2026.
Aug. 14, 2026 · 2 pages · 848 KB · PDS-Legal Notice
Application
- Download Zoning certificate application for accessory dwelling unit
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
Photos
- Download Site photographs
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
Correspondence
- Download Ada County Highway District comments
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 Fire Department 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 Parks and Recreation 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 Public Works sewer 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 Veolia fire flow information
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
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



