Planning project · Planning application
Retaining wall on hillside residential lot approved
City staff approved plans for a retaining wall on a 0.32-acre residential lot in a hillside development area. The Jan. 2 administrative decision came after a review that flagged slope and drainage questions.
From the filing
The application's description as it appears in City of Boise's record. See the official record
Retaining Wall in Hillside Development
Project name on file: 4430 W QUAIL POINT CT
Timeline
Oct. 13, 2026
6 documents added
Jan. 2, 2026
Planning Applications: Project Entitled
Jan. 2, 2026
Pending Application Submittal: Planning Applications in Review
July 1, 2025
Planning Applications: Additional CR Needed
July 1, 2025
Pending Application Submittal: Start Additional IDR
July 1, 2025
Pending Application Submittal: Planning Applications in Review
July 1, 2025
IDR Review Complete: IDR Complete
July 1, 2025
Concept Review Complete: CR Complete - Type 2
June 27, 2025
Concept Review Complete: Engineering Preview
June 27, 2025
Concept Review Complete: Engineering Preview Complete
A determination has been made that this project will be a Category II Hillside project due to the nature of surrounding slopes. In addition to the already submitted documents, additional documents may be required during the CFH Review process.Additional documents that you can expect to provide will be a geotechnical report with a global slope stability analysis; structural calculations for any retaining wall that is greater than four feet of height; more than one retaining wall when the horizontal interior distance between the retaining walls is less than 10 feet and the total of all retaining walls exceeds four feet in height; a retaining wall having a surcharge; or having a backslope greater than three feet horizontal to one foot vertical (the proposed meets at least two); additional information of the existing drain pipe system (ie outfall location, functionality) that the new system will be connecting too; complete proposed contouring as the proposed slope percentages do not match the remaining existing contours.If you would like to discuss this determination, please contact us at HillsideDrainage@cityofboise.org or we can set up a meeting if you prefer.
June 27, 2025
Application Submittal: Online
June 27, 2025
Application filed
Documents
Plans
- Download Landscape and grading plans, general notes
General construction notes for landscape and grading work, covering utility locating, drainage, grading of planting areas, plant substitutions, and slope erosion control.
June 27, 2025 · 3 pages · 3.8 MB · PDS-Other Small Docs
Project narrative
- Download Concept review summary report
Advisory concept review finding the retaining wall project a Category II hillside development, with a list of geotechnical, structural and drainage documents expected later.
July 1, 2025 · 1 page · 444 KB · PDS-Concept Review Summary Report
- Download Concept review summary report
Advisory concept review finding the retaining wall project a Category II hillside development, with a list of geotechnical, structural and drainage documents expected later.
July 1, 2025 · 1 page · 444 KB · PDS-Concept Review Summary Report
- Download Project narrative for boulder retaining wall
Describes a boulder retaining wall, up to 4 feet high with drainage, planted with trees and shrubs for screening, and prepared by a landscape architect in training.
June 27, 2025 · 1 page · 160 KB · PDS-Other Small Docs
Application
- Download Planning project application form
Application form for a single-family attached dwelling use in the R-1B zone, with applicant, owner and property details, and a Hillside Questionnaire requirement.
June 27, 2025 · 2 pages · 154 KB · PDS-Application
- Download Public Works hillside project questionnaire
Completed questionnaire from Public Works on hillside project details, covering grading, retaining walls, new access and structures.
June 27, 2025 · 1 page · 68 KB · PDS-Other Small Docs
