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.

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
July 28, 2026
Appeal Period: Completed
July 17, 2026
Review Complete: Completed
July 17, 2026
DR: Complete
June 24, 2026
DR: In Review
June 24, 2026
Assign Reviewers: Completed
June 23, 2026
Fee Payment: Payment Received
June 22, 2026
Prescreen Review: Passed
June 18, 2026
Prescreen Review: In Progress
June 15, 2026
Prescreen Review: Corrections Required
June 14, 2026
Prescreen Review: In Progress
June 3, 2026
Prescreen Review: Corrections Required
June 1, 2026
Prescreen Review: In Progress
May 19, 2026
Application Submittal: ePlanReview
May 19, 2026
Application filed
Documents
Site plans
- Download Cover sheet and site plan
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
Renderings
- Download Conceptual exterior perspectives, row house units A and B
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
Plans
- Download Upper floor plan
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 Roof plan with attic ventilation calculations
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 Upper floor plan, row house unit B
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 Roof plan with attic ventilation calculations and general notes
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 Exterior elevations, sheets A-3.1 and A-2.1
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 Landscape and mobility plan
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
Project narrative
- Download Detailed letter of explanation for zoning certificate
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
Decisions
- Download Action letter approving administrative design review and zoning certificate
Planning and Development Services approves two residential small lots with accessory dwelling units, subject to attached conditions of approval, findings, and revised plans dated June 24, 2026.
July 17, 2026 · 13 pages · 262 KB · PDS-Action Letter
Notices
- Download Notice of approval for design review and zoning certificate
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
Application
- Download Zoning certificate application for demolition and new construction
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
Photos
- Download Site photos, sheet G-1.2
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
Correspondence
- Download Boise Fire Department comments
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 Parks and Recreation comments on tree mitigation
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 Public Works sewer comments
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 Veolia fire flow information
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
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





