Zoning certificate · Planning application

Boise approves new 4,801-square-foot home and conversion of older house to ADU

The approval, conditioned on the new home receiving occupancy, would turn the existing 1962 house into an 804-square-foot, two-bedroom accessory dwelling unit. The applicant is no longer pursuing a duplex.

ApprovedCZC26-00070Filed March 13, 2026Hillcrest · 2501 S Eagleson Rd+1 related filing

Site plan for Boise approves new 4,801-square-foot home and conversion of older house to ADU — 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 convert the existing 1962 single-family home at 2501 S Eagleson Rd into an 804-square-foot, two-bedroom accessory dwelling unit and build a new 4,801-square-foot single-family home in front of it. The city also confirmed that the existing garage, which sits in the side setback, is a legal nonconforming structure because it predates the 1966 zoning code.
LNC/ADU/Duplex. As of 4/13/26 applicant is no longer proceeding with a duplex.
Project name on file: 2501 S EAGLESON RD

Timeline

Aug. 1, 2026
Appeal Period: Completed
July 21, 2026
Review Complete: Completed
July 21, 2026
Current Planning: Complete
July 10, 2026
Current Planning: In Review
July 10, 2026
Assign Reviewers: Completed
June 9, 2026
Review Complete: Corrections Required
June 9, 2026
Current Planning: Corrections Required
April 29, 2026
Current Planning: In Review
April 29, 2026
Assign Reviewers: Completed
April 13, 2026
PDS Refund: Notes
waiting for mailing address confirmation before processing
April 13, 2026
PDS Refund: Complete
March 27, 2026
Review Complete: Corrections Required
March 26, 2026
Current Planning: Corrections Required
March 19, 2026
Current Planning: In Review
March 19, 2026
Assign Reviewers: Completed
March 17, 2026
Fee Payment: Payment Received
March 17, 2026
Prescreen Review: Passed
March 17, 2026
Prescreen Review: In Progress
March 13, 2026
Application Submittal: ePlanReview
March 13, 2026
Application filed

Documents

Site plans

Construction drawing set for an accessory dwelling unit, with general construction notes on code requirements, fire blocking, concrete, water heater strapping and egress windows.
April 29, 2026 · 12 pages · 18.1 MB · PDS-Maps and Drawings
Download Site plan, elevations and floor plan

Plans

April 29, 2026 · 1 page · 69 KB · PDS-Maps and Drawings
Download 1964 aerial imagery
Aerial photograph of the site from 1986, with mostly garbled or upside-down text in the scan, attached to a zoning certificate.
April 29, 2026 · 1 page · 160 KB · PDS-Maps and Drawings
Download 1986 aerial imagery

Project narrative

Describes converting the existing 800 sq ft residence into an ADU and building a new two-story duplex in front of it, with parking and fire-rated stair wall details.
April 29, 2026 · 1 page · 33 KB · PDS-Letter of Intent
Download Letter of intent: project description for duplex and ADU
Owner's signed statement granting permission for an applicant to submit a Boise zoning certificate application and agreeing to indemnify the city.
April 29, 2026 · 1 page · 33 KB · PDS-Statement of Legal Interest
Download Statement of legal interest

Decisions

Notice that the city approved an accessory dwelling unit and confirmed legal nonconforming status for an existing garage within the interior side setback, with findings and conditions.
July 21, 2026 · 12 pages · 229 KB · PDS-Action Letter
Download Administrative approval letter for ADU and legal nonconforming garage

Notices

Planning and Development Services notice that a zoning certificate for an accessory dwelling unit and legal nonconforming structure was approved, with appeal deadline July 31, 2026.
July 17, 2026 · 2 pages · 667 KB · PDS-Legal Notice
Download Notice of approval for zoning certificate

Application

Application form for a zoning certificate covering a proposed duplex, with property, agent, applicant and owner details in the R-1B zone; no project square footage or bedroom count is filled in.
March 13, 2026 · 3 pages · 208 KB · PDS-Application
Download Zoning certificate application for duplex, triplex or fourplex

Correspondence

Building Department review notes that fire-resistant construction and projection limits near property lines would apply between an ADU and the primary home; not a complete plan review.
July 21, 2026 · 1 page · 88 KB · PDS-Agency Comments
Download Building Department comments on setbacks and fire-resistant construction
Fire Department recommends approval subject to code conditions: hydrant spacing and fire flow with an NFPA 13D sprinkler alternate, and access road distance verification.
July 21, 2026 · 2 pages · 222 KB · PDS-Agency Comments
Download Boise Fire Department comments
Veolia Water Idaho reports available water pressure and flow at a nearby hydrant for fire sprinkler design, to be attached to the architectural plan sets.
April 29, 2026 · 1 page · 92 KB · PDS-Other Small Docs
Download Veolia Water fire flow letter
Veolia Water Idaho reports water pressure and flow available at a nearby hydrant for fire sprinkler design, under maximum-day conditions.
April 29, 2026 · 1 page · 130 KB · PDS-Other Small Docs
Download Veolia fire flow information
Emails between the applicant's contractor and city planning staff about refunding a $231 duplex review fee, with a payment-scam warning from the city.
April 13, 2026 · 7 pages · 1.0 MB · PDS-Correspondence
Download Refund request correspondence for duplex review fee

Boise approves new 4,801-square-foot home and conversion of older house to ADU

From the filing

Timeline