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Planning project · Planning application

Retaining walls proposed to replace failing wood structures on hillside lot

The plan would replace wood foundations and retaining structures at a home that have reached the end of their life. The 0.51-acre residential lot is in the city's hillside review, and staff are still reviewing the application.

In reviewPLN26-00651Filed July 8, 2026Highlands · 877 E Chardie Rd+1 related filing
Site plan for Retaining walls proposed to replace failing wood structures on hillside lot
Site plan from the application documents.
Pin at the reported location; the shaded outline is the primary parcel (Ada County).

About this application

Retaining walls in Hillside

Project name on file: 877 E CHARDIE RD

Timeline

  1. Two days ago

    11 documents added

  2. July 25, 2026

    Pending Application Submittal: Planning Applications in Review

  3. July 21, 2026

    Concept Review Complete: CR Complete - Type 2

  4. July 14, 2026

    Concept Review Complete: Corrections Required

    Please label the distance between the retaining walls and the side and rear setbacks.Please label the height of the walls within the setbacks. In the side setback, the height shall not exceed 72 inches.

  5. July 13, 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 comment on the use of support piers and 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.

  6. July 10, 2026

    Concept Review Complete: Engineering Preview

  7. July 8, 2026

    Application Submittal: Online

  8. July 8, 2026

    Application filed

Documents

Site plans

Plans

  • Structural detail sheets for retaining walls, with general structural notes, abbreviations, and special inspection requirements under the 2018 IBC.

    July 8, 2026 · 5 pages · 6.6 MB · PDS-Other Small Docs

    Download Retaining walls structural drawings

Project narrative

Application

Studies and reports

Correspondence

  • Public Works guidance on when retaining walls in the hillside zone need a determination, slope stability analysis, and planning-code height and setback limits.

    July 13, 2026 · 5 pages · 804 KB · PDS-Agency Comments

    Download Hillside retaining wall permitting guidance

Other documents

  • Updated structural drawings with revised wall heights and setbacks

    Revised structural drawings reflecting requested changes to 72-inch wall heights and setbacks; only the plan view page was updated.

    July 21, 2026 · 6.6 MB · PDS-Other Small Docs

  • Public Works questionnaire answering whether the project involves new earthwork over 12 inches deep and retaining walls, with no new parcels, dwellings or driveways.

    July 8, 2026 · 1 page · 700 KB · PDS-Other Small Docs

    Download Hillside project questionnaire

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