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Zoning certificate · Planning application

Two new homes with garage apartments approved to replace one house on small lot

The plan tears down an existing home and builds two two-story houses on small lots, each with a one-bedroom apartment above a detached garage, four units in all. Approved July 17 with conditions including alley parking and a wider detached sidewalk with street trees.

ApprovedCZC26-00114Filed May 19, 2026Southeast Boise · 1427 S Colorado Ave+2 related filings
Site plan for Two new homes with garage apartments approved to replace one house on small lot
Site plan from the application documents.
Pin at the reported location; the shaded outline is the primary parcel (Ada County).

From the filing

The application's description as it appears in City of Boise's record. See the official record

The applicant plans to tear down the existing home at 1427 S Colorado Ave in Boise and build two detached single-family homes on small lots. Each home gets a detached two-stall garage with a one-bedroom accessory dwelling unit above it, and parking is reached from the alley. The buildings are about 23 feet tall to the roof peak and are two stories.

Demolish existing home , Small lot 2 new SFD w ADU

Project name on file: 1427 S COLORADO AVE

Timeline

  1. July 28, 2026

    Appeal Period: Completed

  2. July 17, 2026

    Review Complete: Completed

  3. July 17, 2026

    DR: Complete

  4. June 24, 2026

    DR: In Review

  5. June 24, 2026

    Assign Reviewers: Completed

  6. June 23, 2026

    Fee Payment: Payment Received

  7. June 22, 2026

    Prescreen Review: Passed

  8. June 18, 2026

    Prescreen Review: In Progress

  9. June 15, 2026

    Prescreen Review: Corrections Required

  10. June 14, 2026

    Prescreen Review: In Progress

  11. June 3, 2026

    Prescreen Review: Corrections Required

  12. June 1, 2026

    Prescreen Review: In Progress

  13. May 19, 2026

    Application Submittal: ePlanReview

  14. May 19, 2026

    Application filed

Documents

Site plans

  • Cover sheet and site plan for a two-unit row house project (Units A and B) with a drawing index, site information, setbacks, and open space details.

    July 9, 2026 · 1 page · 1.1 MB · PDS-Maps and Drawings

    Download Cover sheet and site plan

Renderings

  • Sheet G-1.1 showing conceptual rear, front and aerial perspective renderings for the small-lot row house units, with cedar-look siding and stone veneer callouts.

    July 9, 2026 · 1 page · 3.1 MB · PDS-Maps and Drawings

    Download Conceptual exterior perspectives, row house units A and B

Plans

  • Floor plan sheet A-1-1 for the upper floor of a row house unit, with area calculations for the main, upper and ADU floors and a garage.

    July 9, 2026 · 1 page · 637 KB · PDS-Maps and Drawings

    Download Upper floor plan
  • Roof plan sheet A-1-2 with general notes and attic ventilation calculations for the main, upper and lower roof areas, with soffit and ridge vent counts.

    July 9, 2026 · 1 page · 357 KB · PDS-Maps and Drawings

    Download Roof plan with attic ventilation calculations
  • Floor plan sheet A-3.1 for the upper floor of row house unit B, with area calculations for the main, upper, ADU and garage floors and a 2-hour fire-rated party wall note.

    July 9, 2026 · 1 page · 451 KB · PDS-Maps and Drawings

    Download Upper floor plan, row house unit B
  • Roof plan sheet A-1-4 showing attic ventilation general notes, net free area calculations for the garage, small lot and lower and upper roofs, and vent counts provided.

    July 9, 2026 · 1 page · 354 KB · PDS-Maps and Drawings

    Download Roof plan with attic ventilation calculations and general notes
  • Architectural elevation drawings for a row house unit and ADU, showing north and south elevations with materials such as stucco, lap siding, asphalt shingle roofing, and stone veneer, dated 6/23/2026.

    July 9, 2026 · 4 pages · 1.4 MB · PDS-Maps and Drawings

    Download Exterior elevations, sheets A-3.1 and A-2.1
  • Sheet L-0.1 showing the landscape plan for a two-unit row house, with notes on open space, fencing, tree removal and bus stops and mobility access.

    July 9, 2026 · 1 page · 759 KB · PDS-Maps and Drawings

    Download Landscape and mobility plan

Project narrative

  • Letter from the project architect proposing demolition of the existing house, splitting the lot, and building a new single-family home and detached garage with an ADU on each lot.

    July 9, 2026 · 1 page · 92 KB · PDS-Letter of Intent

    Download Detailed letter of explanation for zoning certificate

Decisions

Notices

  • City of Boise notice that staff approved two small lot single-family homes with accessory dwelling units and demolition of an existing home, with an appeal deadline of July 27, 2027.

    July 15, 2026 · 2 pages · 719 KB · PDS-Legal Notice

    Download Notice of approval for design review and zoning certificate

Application

  • Zoning certificate application to demolish an existing home and build two small-lot single-family dwellings with an accessory dwelling unit, with applicant and owner details and a submittal checklist.

    May 19, 2026 · 3 pages · 206 KB · PDS-Application

    Download Zoning certificate application for demolition and new construction

Photos

  • Photographs of the site, including neighboring properties, the existing residence to be demolished, and the street across from the site, submitted with a small lot row house plan.

    July 9, 2026 · 1 page · 3.1 MB · PDS-Photos

    Download Site photos, sheet G-1.2

Correspondence

  • Fire Department recommends approval subject to code conditions, including interconnected heat detection in the garage beneath the ADU and standard hydrant and access requirements.

    July 16, 2026 · 1 page · 193 KB · PDS-Agency Comments

    Download Boise Fire Department comments
  • Boise Parks and Recreation requests an arborist assessment and mitigation calculations for a 24-inch tree proposed for removal, noting a 20-inch deficit and a $400-per-inch payment option.

    July 16, 2026 · 2 pages · 357 KB · PDS-Agency Comments

    Download Parks and Recreation comments on tree mitigation
  • Public Works requires a separate sewer service line connected to the city mainline, a sewer tap permit, and possible sewer capacity fees at building permit issuance.

    July 16, 2026 · 1 page · 67 KB · PDS-Agency Comments

    Download Public Works sewer comments
  • Veolia Water Idaho provides available water pressure and flow at a nearby hydrant for fire sprinkler design, to be attached to plan sets.

    July 9, 2026 · 1 page · 113 KB · PDS-Other Small Docs

    Download Veolia fire flow information

Other documents

  • Noticing radius map

    July 15, 2026 · 514 KB · PDS-Maps and Drawings

  • Transmittal to agencies

    July 10, 2026 · 131 KB · PDS-Transmittal Agencies

  • Receipt

    July 9, 2026 · 134 KB · PDS-Receipts

  • Statement of legal interest

    July 9, 2026 · 103 KB · PDS-Statement of Legal Interest

  • Receipt

    June 23, 2026 · 135 KB · PDS-Receipts

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