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Design review · Planning application

Cook Bros. approved for two homes with garages and apartments above

The city approved on Jan. 23 a plan to demolish an existing house and build two two-story single-family homes, each with a detached garage and an accessory dwelling unit above it, with conditions on construction hours and outdoor lighting.

ApprovedDRH25-00415Filed Dec. 5, 2025West End · 911 N 31st St+2 related filings
Site plan for Cook Bros. approved for two homes with garages and apartments above
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

Cook Bros Construction proposed two single-family homes on two small residential lots at 911 N 31st St in Boise, each with a detached garage and an accessory dwelling unit above it. The homes are two stories, with a peak height of about 27 feet, in an urban residential zone. The city approved the project on January 23, 2026, with conditions.

Residential Small Lot *Building Permits were issued with no ADU or Living Space Above Garages. In order to include in the future, need to show compliance with residential floor area requirement*

Project name on file: 911 N 31ST ST

Timeline

  1. Feb. 3, 2026

    Appeal Period: Completed

  2. Jan. 23, 2026

    Review Complete: Completed

  3. Jan. 23, 2026

    DR: Complete

  4. Dec. 31, 2025

    DR: In Review

  5. Dec. 31, 2025

    Assign Reviewers: Completed

  6. Dec. 16, 2025

    Fee Payment: Payment Received

  7. Dec. 16, 2025

    Prescreen Review: Passed

  8. Dec. 12, 2025

    Prescreen Review: In Progress

  9. Dec. 12, 2025

    Prescreen Review: Corrections Required

  10. Dec. 11, 2025

    Prescreen Review: In Progress

  11. Dec. 5, 2025

    Application Submittal: ePlanReview

  12. Dec. 5, 2025

    Application filed

Documents

Site plans

  • Drawing of the proposed site and landscape layout, with a note schedule for materials such as irrigated bluegrass lawn, boxwood, hydrangea, maple trees, vinyl fencing and crushed rock.

    Dec. 31, 2025 · 1 page · 507 KB · PDS-Maps and Drawings

    Download Proposed site and landscape plan

Plans

  • Revised exterior elevation drawings showing front, rear, left and right views, with a highest ridge height of 26.1 feet, dated 12/11/2025 at 1/4" = 1' scale.

    Dec. 31, 2025 · 1 page · 3.4 MB · PDS-Maps and Drawings

    Download Exterior elevations (front, rear, left and right)
  • Scaled floor plan sheet showing room layouts, window and door schedules, and square footage for the first and second floors, dated 12/11/2025.

    Dec. 31, 2025 · 1 page · 262 KB · PDS-Maps and Drawings

    Download Floor plan, first and second floors
  • Revised first and second floor plans for a garage and accessory dwelling unit, with room areas, window and door schedules, and a revision table dated 12/11/2025.

    Dec. 31, 2025 · 1 page · 2.4 MB · PDS-Maps and Drawings

    Download Garage and ADU floor plans

Project narrative

  • Applicant describes plans to demolish the existing home and accessory structures and build two new two-story single-family homes, each with a detached garage and ADU.

    Dec. 31, 2025 · 1 page · 68 KB · PDS-Letter of Intent

    Download Letter of explanation from applicant

Decisions

  • Planning department approval of two single-family dwellings with detached garages and accessory dwelling units on small residential lots, subject to conditions and a two-week appeal window.

    Jan. 23, 2026 · 12 pages · 299 KB · PDS-Action Letter

    Download Design review approval letter

Notices

  • Staff notice that two single-family homes with detached garages and accessory dwelling units were approved in an R-3 zone; appeals are due by February 2, 2026.

    Jan. 21, 2026 · 2 pages · 929 KB · PDS-Legal Notice

    Download Notice of approval

Application

  • Design review application for a single-family project at a 0.13-acre R-3 parcel, with applicant, owner and property details; existing structure to be removed.

    Dec. 31, 2025 · 5 pages · 230 KB · PDS-Application

    Download Design review application form
  • Design review application for a single-family property proposing removal of the existing structure, with applicant and owner contact details and site information.

    Dec. 5, 2025 · 5 pages · 226 KB · PDS-Application

    Download Design review application form

Photos

Correspondence

  • ACHD reports no required street improvements and lists traffic impact fee, driveway approach permit, and right-of-way permit requirements, plus standard conditions of approval.

    Jan. 23, 2026 · 3 pages · 223 KB · PDS-Agency Comments

    Download Ada County Highway District comments
  • Fire Department approves the two-dwelling request as proposed, requiring a heat detector interconnected with smoke detectors in the garage's accessory dwelling unit.

    Jan. 23, 2026 · 1 page · 166 KB · PDS-Agency Comments

    Download Boise Fire Department comments
  • Parks and Forestry staff ask about a mature rear-yard tree not shown for removal on the site plan, and note no new trees are planned.

    Jan. 23, 2026 · 1 page · 58 KB · PDS-Agency Comments

    Download Boise Parks and Recreation comments
  • Public Works requires connection to central sanitary sewer, separate service lines for each home, a sewer tap permit, and possible sewer capacity fees at building permit.

    Jan. 23, 2026 · 1 page · 43 KB · PDS-Agency Comments

    Download Public Works sewer comments
  • Public Works street light trades supervisor reports no comments on the design review application.

    Jan. 23, 2026 · 1 page · 125 KB · PDS-Agency Comments

    Download Public Works street light comments
  • Water utility comments requiring a will-serve letter, submitted civil or site plans for review, separate service lines and meters per building, and current Veolia standards.

    Jan. 23, 2026 · 1 page · 307 KB · PDS-Agency Comments

    Download Veolia Water Idaho comments
  • Veolia Water Idaho reports system pressure and fire flow available at a nearby hydrant, for use in fire sprinkler design on the attached plan sets.

    Dec. 31, 2025 · 1 page · 131 KB · PDS-Other Small Docs

    Download Veolia water pressure and flow letter for fire flow review

Other documents

  • Noticing radius map

    Jan. 21, 2026 · 638 KB · PDS-Maps and Drawings

  • Transmittal sheet

    Jan. 2, 2026 · 100 KB · PDS-Transmittal Agencies

  • Statement of legal interest

    Dec. 31, 2025 · 393 KB · PDS-Statement of Legal Interest

  • Fee receipt

    Dec. 16, 2025 · 136 KB · PDS-Receipts

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