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Plan to remove and rebuild deck on single-family home sought under hillside rules

The owner of a single-family home on a 0.3-acre lot wants to remove an existing deck and rebuild it. City planners say the site needs hillside review because of steep slopes and unstable soils. The application is under administrative review.

In reviewPLN26-00491Filed May 21, 2026Central Foothills · 3304 N North Mountain Ln+1 related filing
Site plan for Plan to remove and rebuild deck on single-family home sought under hillside rules
Site plan from the application documents.
Pin at the reported location; the shaded outline is the primary parcel (Ada County).

From the filing

City of Boise hasn't published a description of this application yet. See the official record

Project name on file: 3304 N NORTH MOUNTAIN LN

Timeline

  1. May 28, 2026

    Pending Application Submittal: Planning Applications in Review

  2. May 26, 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, 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 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 or we can set up a meeting if you prefer.

  3. May 26, 2026

    Concept Review Complete: CR Complete - Type 2

  4. May 21, 2026

    Concept Review Complete: Engineering Preview

  5. May 21, 2026

    Application Submittal: Online

  6. May 21, 2026

    Application filed

Documents

Site plans

  • Revised site plan sheet with general construction notes, including dimensioning, blocking, fire-stopping and door jamb requirements, dated 7/7/2026.

    July 9, 2026 · 1 page · 323 KB · PDS-Maps and Drawings

    Download Updated site plan

  • Architect's updated site plan showing new building footprint, hardscape, landscaping, setbacks, and existing residence and deck to be repaired, with general construction notes.

    July 9, 2026 · 1 page · 464 KB · PDS-Photos

    Download Updated site plan

  • Sheet G001 of the architectural drawing set, with abbreviations, general project notes on scope and coordination, and the sheet index.

    May 21, 2026 · 1 page · 609 KB · PDS-Other Small Docs

    Download Project information and general notes sheet

  • Architect's site plan sheet with general notes, site symbols and project information for rebuilding a deck and building a new footprint at a residence.

    May 21, 2026 · 1 page · 465 KB · PDS-Other Small Docs

    Download Site plan for residence deck rebuild

Plans

  • Subdivision plat sheet listing curve data, private drive and common area designations, utility easements, building setback notes, and a drainage easement restriction.

    July 9, 2026 · 3 pages · 1.9 MB · PDS-Maps and Drawings

    Download Subdivision plat with curve data table and easement notes

  • Architect's demolition plan sheet with general demolition notes covering partitions, ceilings, finishes, doors, glazing and structural limits for the basement and level 02.

    May 21, 2026 · 1 page · 412 KB · PDS-Other Small Docs

    Download Basement and level 02 demolition plan

  • Architectural general notes for the basement and level 02 plans, covering field verification, patching, blocking, caulking, fire-stopping, and door jambs.

    May 21, 2026 · 1 page · 385 KB · PDS-Other Small Docs

    Download Basement and level 02 general notes sheet

  • Cover sheet for the permitting set of a residential deck rebuild, listing project contacts, applicable codes (2018 IBC/IRC, 2023 NEC), and sheet G000.

    May 21, 2026 · 1 page · 1.3 MB · PDS-Other Small Docs

    Download Cover sheet

  • Architectural sheet showing north, east, south and west building elevations for a deck rebuild, with level heights, material notes and a deck decking requirement.

    May 21, 2026 · 1 page · 636 KB · PDS-Other Small Docs

    Download Exterior elevations (sheet A201)

  • Floor plan sheet showing the extent of interior demolition for level 01, with general demolition notes covering partitions, ceilings, finishes, doors, and windows.

    May 21, 2026 · 1 page · 351 KB · PDS-Other Small Docs

    Download Level 01 demolition plan

  • Architectural floor plan sheet for Level 01 showing new layout, with general notes on dimensions, blocking, caulking, fire-stopping and door jambs.

    May 21, 2026 · 1 page · 324 KB · PDS-Other Small Docs

    Download Level 01 new plan drawing

Project narrative

  • Advisory concept review for a single-family deck rebuild, finding the project a Category II Hillside application and listing expected geotechnical, structural and civil documents.

    June 12, 2026 · 2 pages · 467 KB · PDS-Concept Review Summary Report

    Download Concept review summary

  • Advisory concept review for a single-family deck rebuild, finding the project a Category II Hillside application and listing expected geotechnical, structural and civil documents.

    June 12, 2026 · 2 pages · 467 KB · PDS-Concept Review Summary Report

    Download Concept review summary

  • Architectural building section sheet (A301) for a permit-phase deck replacement, with notes calling for fire-retardant treated lumber and Class A PVC decking.

    May 21, 2026 · 1 page · 526 KB · PDS-Other Small Docs

    Download Building sections, deck rebuild

  • Architectural building section sheet (A301) for a permit-phase deck replacement, with notes calling for fire-retardant treated lumber and Class A PVC decking.

    May 21, 2026 · 1 page · 526 KB · PDS-Other Small Docs

    Download Building sections, deck rebuild

Application

  • Application for a single-family home project to rebuild a deck, filed by a construction company on behalf of the owner in the R-1B zone.

    May 21, 2026 · 2 pages · 158 KB · PDS-Other Small Docs

    Download Planning project application form

Studies and reports

  • Site-specific geotechnical study covering geology, flooding, subsurface soils, groundwater, ground motion, and earthwork recommendations for the residential property.

    May 21, 2026 · 42 pages · 4.7 MB · PDS-Other Small Docs

    Download Limited geotechnical investigation report

  • Structural calculations packet for the deck, covering design criteria (2018 IBC snow, wind, seismic and load values), general specifications and foundation notes, 59 pages, digitally stamped 2/13/2026.

    May 21, 2026 · 59 pages · 11.5 MB · PDS-Other Small Docs

    Download Structural calculations for deck

Photos

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.

    May 26, 2026 · 5 pages · 804 KB · PDS-Agency Comments

    Download Hillside retaining wall permitting guidance

Other documents

  • Blank Public Works questionnaire asking whether a project involves new parcels, grading, driveways, dwellings, or retaining walls over 4 feet.

    May 21, 2026 · 1 page · 113 KB · PDS-Other Small Docs

    Download Public Works hillside project questionnaire

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