Planning project · Planning application
Detached workshop with office loft proposed to replace failing storage building
The owners want to tear down a roughly 1,000-square-foot storage building and build a roughly 1,600-square-foot workshop with a 440-square-foot second-floor office, in front of the existing house on a 5.1-acre lot. It needs a conditional use permit and review by the Planning and Zoning Commission.

About this application
CUP for detached accessory in front of the primary structure in Hillside
Project name on file: 2478 E WARM SPRINGS AVE
Timeline
Today
Document added: PDS-Other Small Docs - NEIGHBORHOOD MEETING INVITE LETTER.
Today
Document added: PDS-Other Small Docs - NEIGHBORHOOD MEETING SIGN UP SHEET.
Two days ago
12 documents added
Two days ago
Status changed from Submitted to In review
Reported as “Neighborhood Meeting Review”.
Sept. 21, 2026
Concept Review Complete: CR Complete - Type 3
Sept. 16, 2026
Concept Review Complete: Engineering Preview Complete
Based on submitted documents and limited overview of the property, a determination has been made that this project will be a Category II Hillside project due to slope, erosion-prone soils, unstable soils, earth movement, and other geologic and hydrologic hazards. In addition to the already submitted documents (please submit them with subsequent applications), additional documents may be required during the CFH Review process.Additional documents that you can expect to provide will be a site-specific geotechnical report with the possibility of a global slope stability analysis (please see the Agency Comment for Hillside Retaining Wall Permitting within this PLN); structural calculations for any retaining wall system that is greater than four feet in height from top of foundation to top of wall, that has more than one wall when the interior horizontal distance between the walls is less than 10 feet and the total height of all walls exceeds four feet, that has a surcharge, that has a backslope greater than three feet horizontal to one foot vertical, or that has structural components (these requirements will be assessed again at the time of occupancy); and civil plans. Please refer to the Hillside Development Requirements for Technical Reports for grading & drainage plan and geotechnical report requirements.A subgrade inspection by a geotechnical firm will be required at the time of construction once the subgrade is exposed and prior to placement of foundation materials or forms/rebar. A report of the inspection will need to be submitted to and accepted by PW Hillside (HillsideDrainage@cityofboise.org) before scheduling your inspection with the Building Department and receiving final occupancy.NOTE: The hazards of developing and building on a property, especially in the Boise foothills, are well known. It is the responsibility of the applicant/owner’s design, geological, and engineering professionals, not the City, to identify, address, and mitigate any hazards to the site. Satisfying these Conditions of Approval is for limited [City purpose] only and should not be relied on for design, geological or engineering purposes. Developer will comply with all requirements of Boise City Hillside Development Code Sections or submit evidence satisfactory to the Boise City Engineer that the proposed development is exempt from the requirements therein stated due to location, topography and/or the absence of adverse conditions associated with slope stability, ground water, erosion and sedimentation.If you would like to discuss this determination, please contact us at HillsideDrainage@cityofboise.org. Please include your application number and address in the subject line.
Sept. 15, 2026
Concept Review Complete: Engineering Preview
Aug. 28, 2026
Concept Review Complete: Corrections Required
Please upload a site plan showing the proposed garage, a floor plan and the hillside questionnaire.
Aug. 27, 2026
Application Submittal: Online
Aug. 27, 2026
Application filed
Documents
Site plans
- Download Updated site plan, concept design V2
Architect's site plan sheet A100 showing a proposed detached structure, with general notes, symbol legend and tree protection notes; marked concept design V2.
Sept. 10, 2026 · 1 page · 136 KB · PDS-Other Small Docs
- Download Basic site plan for parcel line adjustment, existing conditions
Survey drawing of a parcel line adjustment showing existing boundaries, curve data, fencing, and the existing house and garage, with original and adjusted parcel acreages.
Aug. 27, 2026 · 1 page · 390 KB · PDS-Other Small Docs
Plans
- Download Updated conceptual floor plans, levels 01 and 02
Concept design V3 floor plans for a small studio apartment project, showing a 440 SF studio unit, storage, a WC, and a utility sink, marked not for construction.
Sept. 15, 2026 · 1 page · 1.4 MB · PDS-Other Small Docs
- Download Conceptual exterior elevations, sheet A201
Concept design set of north, south, east and west building elevations, marked not for construction and dated for the Concept Design V2 phase.
Sept. 10, 2026 · 1 page · 403 KB · PDS-Other Small Docs
- Download Conceptual floor plans, level 02
Architect's conceptual design floor plan sheet A201 for the second level, marked as not for construction, showing a 515 SF studio apartment and 1,370 SF upper level.
Sept. 10, 2026 · 1 page · 1.2 MB · PDS-Other Small Docs
Project narrative
- Download Updated project description for conditional use and hillside applications
Describes replacing a failing detached storage structure with a workshop and office building in the hillside/WUI zone, and states the project meets zoning and hillside requirements.
Sept. 17, 2026 · 1 page · 51 KB · PDS-Other Small Docs
- Download Conditional use and hillside project description
Describes replacing a failing detached storage structure with a detached art studio and studio ADU in the hillside zone, and states the project meets the zoning code.
Sept. 15, 2026 · 1 page · 51 KB · PDS-Other Small Docs
Other documents
- PDS-Other Small Docs - NEIGHBORHOOD MEETING INVITE LETTER.
Today · 1.6 MB · PDS-Other Small Docs
- PDS-Other Small Docs - NEIGHBORHOOD MEETING SIGN UP SHEET.
Today · 173 KB · PDS-Other Small Docs
- PDS-Concept Review Summary Report -
Sept. 21, 2026 · 462 KB · PDS-Concept Review Summary Report
- PDS-Other Small Docs - UPDATED FLOOR PLANS
Sept. 17, 2026 · 1.4 MB · PDS-Other Small Docs
- PDS-Agency Comments - HILLSIDE RETAINING WALL PERMITTING_OCTOBER2025
Sept. 16, 2026 · 804 KB · PDS-Agency Comments
- PDS-Other Small Docs - HILLSIDE QUESTIONNAIRE
Sept. 10, 2026 · 688 KB · PDS-Other Small Docs
- PDS-Application
Aug. 27, 2026 · 155 KB · PDS-Application