Planning project · Planning application
Landscaping plan with retaining walls, stairs and patios approved for hillside home lot
The city approved plans for retaining walls, concrete stairs, patio areas and new landscaping on a 0.27-acre lot with an existing house. Staff approved it Jan. 16 after a hillside review; the lot slopes steeply toward the rear.
From the filing
The application's description as it appears in City of Boise's record. See the official record
Landscaping improvements including walls, stairs, and patio areas.
Project name on file: 490 E BALMORAL RD - CFH
Timeline
Oct. 13, 2026
29 documents added
Jan. 16, 2026
Planning Applications: Project Entitled
Sept. 3, 2025
Pending Application Submittal: Planning Applications in Review
July 3, 2025
Concept Review Complete: CR Complete - Type 2
July 1, 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 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.Additionally, the detail for the Energy Flow Dissipater and Flow Spreader needs to show that perforations are only on the upper part (ie 180- 225 degrees) of the pipe to allow the stormwater to flow evenly out as it fills. For a flow spreader which will allow the stormwater to flow out onto the slope does need a pre- and post-development analysis but not infiltration. The post-development analysis will need to not only show that the flow has not increased but also has not concentrated to an area. The flow spreader will need to be designed and shown in simple calculations (can be placed on plans) to not surcharge the transmission piping, that the length of perforated pipe is adequate to evenly distribute the flow and there are an adequate number of orifices. A hydrology report is not necessary for a flow spreader.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 17, 2025
Concept Review Complete: Engineering Preview
May 28, 2025
Concept Review Complete: Corrections Required
The setbacks listed on the Plat are front - 20 feet, sides - 7.5 feet, and rear 25-feet.The plans show features that appear to encroach into the setbacks or crossing over the property line. Please delineate the setbacks on the site plan.Please be mindful that patios, porches, and decks that are one-foot or more above adjacent grade may not encroach into required setbacks.
May 27, 2025
Concept Review Complete: Engineering Preview
May 27, 2025
Concept Review Complete: Corrections Required
There is considerable confusion with the proposed drain system; the plans show a flow spreader; the report indicates a permeable paver bed but has calculations for a seepage bed. Please clarify what stormwater facility is being proposed within all documentation. Additionally, the percolation test result in the geotechnical report is below the required minimum set within our manual; provide a tangible solution.Due to the aggressive slopes on site, provide a global slope stability analysis by the geotechnical engineer.The following can be submitted with the next phase of the application (once this PLN is completed):Engineering calculations will be required for any retaining wall that is greater than four feet of height; more than one retaining wall when the horizontal 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
May 21, 2025
Application Submittal: Online
May 21, 2025
Application filed
Documents
Site plans
- Download Concept review summary report
Planner's advisory summary for a Type 2 landscaping project, covering setback delineation, Category II hillside status, retaining wall and stability documents, and a stormwater flow spreader detail.
July 3, 2025 · 2 pages · 447 KB · PDS-Concept Review Summary Report
Plans
- Download Deck plans with construction notes and main level floor plan
Deck plan sheet with numbered sheet notes covering gas and power meters, guardrails, landings, fire-rated garage door, hose bibbs, and WUI roofing requirements, dated July 14, 2025, Revision A.
Dec. 27, 2025 · 2 pages · 928 KB · PDS-Other Small Docs
- Download Grading details sheet: stairs, retaining wall and drainage notes
Construction detail sheet with plan and section views for concrete stairs, a poured-in-place retaining wall, drain pipe, base course and rebar, plus general notes.
Dec. 27, 2025 · 1 page · 585 KB · PDS-Other Small Docs
- Download Grading and drainage details sheet
Construction detail drawings for grading and drainage, covering downspout connections, cleanouts, trench drain, foundation drain and expansion joints, dated 2025.
Dec. 27, 2025 · 1 page · 543 KB · PDS-Other Small Docs
- Download Grading plan
Grading notes and drainage overview for the site, covering benchmarks, contours, slopes, swales, and impervious and pervious area figures.
Dec. 27, 2025 · 1 page · 718 KB · PDS-Other Small Docs
- Download Grading plan
Grading and storm drainage plan sheet showing lot area, impervious and pervious coverage, existing and proposed drainage, and general drainage and utility separation notes.
Dec. 27, 2025 · 1 page · 683 KB · PDS-Other Small Docs
- Download Grading plan
Grading notes and drainage overview for the site, covering benchmarks, contours, slopes, swales, and impervious and pervious area figures.
Dec. 27, 2025 · 1 page · 718 KB · PDS-Other Small Docs
- Download Retaining wall notes and dowel installation details
Structural notes for retaining walls covering concrete strength, rebar lap splices, footing depth, and epoxy anchor and dowel installation requirements.
Dec. 27, 2025 · 1 page · 881 KB · PDS-Other Small Docs
- Download Structural calculations
Structural calculations by a licensed engineer for the Gwinn Residence, covering design criteria, deck joist member checks, and footing and retaining wall exhibits.
Dec. 27, 2025 · 21 pages · 1.2 MB · PDS-Other Small Docs
- Download Revised grading plans
Revised grading plan sheet showing lot area and impervious and pervious coverage figures, plus storm drain and drainage notes for the subdivision phase.
Sept. 2, 2025 · 1 page · 962 KB · PDS-Other Small Docs
- Download Revised grading plans
Revised grading plan sheet with grading notes, benchmark elevation, lot and impervious/pervious area figures, and spot elevations for the single-family lot.
Sept. 2, 2025 · 1 page · 951 KB · PDS-Other Small Docs
- Download Revised grading and drainage plan details
Detail sheet with drainage and grading details for downspouts, trench drains, foundation drains and cleanouts, dated 2025 and copyright Weber Design Studio.
Sept. 2, 2025 · 1 page · 520 KB · PDS-Other Small Docs
- Download Revised grading plans (stair and retaining wall details)
Sheet of revised grading plan details for a stair, concrete retaining wall and railing, including section views, rebar schedules and construction notes from the design firm.
Sept. 2, 2025 · 1 page · 539 KB · PDS-Other Small Docs
- Download Grading and drainage details
Construction detail sheet showing downspout connections, cleanouts, foundation drains, expansion joints and a flow level spreader, prepared by Weber Design Studio, PLLC.
June 17, 2025 · 1 page · 706 KB · PDS-Other Small Docs
- Download Updated grading and drainage details
Sheet of construction details for stairs, retaining wall, drain pipe, and base course, with notes on stair steps, railings, and avoiding underground utility lines.
June 17, 2025 · 1 page · 539 KB · PDS-Other Small Docs
- Download Updated grading plan
Revised grading notes and drainage layout for an existing single-family home addition, covering lot and impervious area figures, benchmark elevations, slope and drainage requirements, and a level spreader for stormwater.
June 17, 2025 · 1 page · 677 KB · PDS-Other Small Docs
- Download Erosion and sediment control details
Sheet of erosion and sedimentation control notes and details, including stabilized construction entrance and inlet protection requirements, prepared by Weber Design Studio.
May 21, 2025 · 1 page · 512 KB · PDS-Other Small Docs
- Download Erosion and sediment control plan general notes
General notes for erosion and sediment control best management practices, covering sediment barriers, inspections, utility locating and right-of-way construction standards.
May 21, 2025 · 1 page · 677 KB · PDS-Other Small Docs
- Download Grading and drainage details
Construction detail sheet showing downspout connections, cleanouts, foundation drains, expansion joints and a flow level spreader, dated 2025 by Weber Design Studio.
May 21, 2025 · 1 page · 702 KB · PDS-Other Small Docs
- Download Grading and drainage plan
Grading notes and drainage overview for an existing single-family home addition, with lot and impervious area figures and stormwater routing notes.
May 21, 2025 · 1 page · 690 KB · PDS-Other Small Docs
Project narrative
- Download Letter of intent
Landscape architect's letter requesting Hillside Category II review for retaining walls, stormwater downspout piping, concrete stairs, and new landscaping on a sloped residential lot.
Dec. 27, 2025 · 1 page · 55 KB · PDS-Other Small Docs
- Download Updated drainage plan
Drainage plan sheet with storm drain notes, lot and impervious area figures, and a level spreader for stormwater from roof and yard drains.
June 17, 2025 · 1 page · 663 KB · PDS-Other Small Docs
- Download Erosion and sediment control plan
Erosion and sediment control plan for a new residential home, covering site assessment, pollutant sources, best management practices, and inspection and recordkeeping.
May 21, 2025 · 35 pages · 1.0 MB · PDS-Other Small Docs
Application
- Download Hillside project questionnaire
Public Works questionnaire checking project scope items such as grading over 12 inches, an exterior addition, and retaining walls, with walls over 4 feet and multiple walls flagged yes.
Dec. 27, 2025 · 1 page · 672 KB · PDS-Other Small Docs
- Download Planning project application form
Application form for a hillside development (Category II) on an R-1B zoned lot, with applicant, owner, and parcel information and a hillside questionnaire requirement.
May 21, 2025 · 2 pages · 154 KB · PDS-Application
Studies and reports
- Download Updated hydrology report with level spreader
Final hydrology report confirming the on-site stormwater design, including a level flow spreader and yard inlets, meets city and state standards for the design storms.
June 17, 2025 · 11 pages · 1.5 MB · PDS-Other Small Docs
- Download Geotechnical investigation report
Soils exploration and foundation evaluation prepared by Atlas Technical Consultants for a residential project, dated January 24, 2025, with fieldwork in January 2025.
May 21, 2025 · 35 pages · 1.3 MB · PDS-Other Small Docs
- Download Final hydrology report
Stormwater management report by a landscape architecture firm confirming on-site drainage design adequacy for proposed retaining walls, stairs, decking and landscaping on a residential lot.
May 21, 2025 · 46 pages · 2.0 MB · PDS-Other Small Docs
Other documents
- Hillside checklist
Dec. 27, 2025 · 903 KB · PDS-Other Small Docs
