Zoning certificate · Planning application
570-square-foot detached backyard home approved with conditions
The one-story, one-bedroom accessory dwelling would sit behind an existing single-family house and stand about 16 feet 3 inches tall. Conditions require matching design, a paved path at least 4 feet wide to the street and on-site drainage.

From the filing
The application's description as it appears in City of Boise's record. See the official record
The city approved a one-story, one-bedroom detached accessory dwelling unit of 570 square feet at 2316 W Frederic St in Boise. It would be built behind an existing single-family house and be about 16 feet 3 inches tall.
Detached ADU.
Project name on file: 2316 W FREDERIC ST
Timeline
Aug. 18, 2026
Appeal Period: Completed
Aug. 7, 2026
Review Complete: Completed
Aug. 7, 2026
Planning and Zoning: Complete
July 22, 2026
Planning and Zoning: In Review
July 22, 2026
Assign Reviewers: Completed
July 13, 2026
Fee Payment: Payment Received
July 10, 2026
Prescreen Review: Passed
July 9, 2026
Prescreen Review: In Progress
July 8, 2026
Prescreen Review: Corrections Required
July 8, 2026
Prescreen Review: In Progress
June 29, 2026
Prescreen Review: Corrections Required
June 26, 2026
Prescreen Review: In Progress
June 22, 2026
Prescreen Review: Corrections Required
June 22, 2026
Prescreen Review: In Progress
June 17, 2026
Application Submittal: ePlanReview
June 16, 2026
Application filed
Documents
Site plans
- Download Floor plans, site plan and elevations for proposed ADU
Drawing sheet showing a proposed accessory dwelling unit's floor plan, site plan and exterior elevations, with a 570 sq ft living area and mini-split heating and cooling.
July 30, 2026 · 1 page · 161 KB · PDS-Maps and Drawings
Project narrative
- Download Letter of intent for accessory dwelling unit
Applicant's detailed letter explaining a proposed accessory dwelling unit meant to complement the existing residence, stating it seeks no special entitlement.
July 30, 2026 · 1 page · 14 KB · PDS-Letter of Intent
Decisions
- Download Zoning certificate approval letter for accessory dwelling unit
Approval letter for a detached one-story, 570 square foot ADU, with findings under the accessory dwelling unit standards and the applicant's conditions of approval.
Aug. 7, 2026 · 9 pages · 237 KB · PDS-Action Letter
Notices
- Download Notice of administrative approval for accessory dwelling unit
Notice that an accessory dwelling unit was administratively approved in an R-1C residential zone, with the appeal deadline of August 17, 2026.
Aug. 5, 2026 · 2 pages · 829 KB · PDS-Legal Notice
Application
- Download Zoning certificate application for accessory dwelling unit
Application for a zoning certificate for a detached accessory dwelling unit in the R-1C zone, with the applicant listed as the property owner and a submittal checklist.
July 30, 2026 · 3 pages · 208 KB · PDS-Application
- Download Zoning certificate application for accessory dwelling unit
Application for a detached accessory dwelling unit on an R-1C zoned residential lot, with a submittal checklist for site plan, elevations and photos.
June 17, 2026 · 3 pages · 205 KB · PDS-Application
Photos
- Download Site photos for proposed ADU
Seven photos of the proposed accessory dwelling unit site and the existing house and backyard, taken from the surrounding streets on July 13, 2026.
July 30, 2026 · 7 pages · 6.5 MB · PDS-Photos
Correspondence
- Download Ada County Highway District comments
ACHD reports no required street improvements and lists fees, driveway approach permits, right-of-way permits and standard conditions of approval for the accessory dwelling unit application.
Aug. 7, 2026 · 3 pages · 160 KB · PDS-Agency Comments
- Download Building Department comments on zoning certificate
Building Department review notes that eaves on the ADU and existing home may violate fire-resistant construction and projection setback rules, and that this is not a complete plan review.
Aug. 7, 2026 · 1 page · 67 KB · PDS-Agency Comments
- Download Public Works drainage comments
Public Works hillside and drainage review requiring an approved stormwater management plan before a building or grading permit is issued.
Aug. 7, 2026 · 1 page · 134 KB · PDS-Agency Comments
- Download Boise Fire Department comments
The Boise Fire Department has no comments on the zoning certificate review, noting that building code requirements will apply and are best addressed at the building permit stage.
Aug. 7, 2026 · 1 page · 151 KB · PDS-Agency Comments
- Download Irrigation district agency comments on zoning certificate
Boise Project Board of Control letter stating no district facilities lie on the property, though it holds a valid water right, and that crossing ditches must stay unobstructed with easements.
Aug. 7, 2026 · 2 pages · 171 KB · PDS-Agency Comments
- Download Parks and Recreation comments on tree removal
Boise Parks and Recreation, with Community Forestry, asks the applicant to clarify whether any mature trees in the rear yard will be removed for a proposed accessory dwelling unit.
Aug. 7, 2026 · 1 page · 62 KB · PDS-Agency Comments
- Download Public Works sewer comments
Public Works requires connection to the central sanitary sewer, notes possible sewer capacity fees at building permit issuance, and conditions final sewer plan approval.
Aug. 7, 2026 · 1 page · 65 KB · PDS-Agency Comments
- Download Veolia Water Idaho comments
Veolia requires a separate water service and meter for the new ADU structure and asks that a site plan be submitted to its engineering department for review.
Aug. 7, 2026 · 1 page · 207 KB · PDS-Agency Comments
- Download Veolia Water fire flow availability letter
Veolia Water Idaho reports available water pressure and flow at a nearby hydrant for fire sprinkler design, to be attached to architectural plan sets.
July 30, 2026 · 1 page · 113 KB · PDS-Other Small Docs
Other documents
- Noticing radius map
Aug. 5, 2026 · 531 KB · PDS-Maps and Drawings
- Statement of legal interest
July 30, 2026 · 105 KB · PDS-Statement of Legal Interest
- Transmittal to agencies
July 30, 2026 · 132 KB · PDS-Transmittal Agencies
- Receipt
July 13, 2026 · 131 KB · PDS-Receipts





