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Historic preservation · Planning application

785-square-foot detached backyard unit approved in historic district

The Historic Preservation Commission approved a one-story accessory dwelling behind an existing house on June 29, with conditions on lot coverage, open space, siding, windows and fences. Plans also show a sauna enclosure, patio and water feature.

ApprovedDRH26-00085Filed March 13, 2026East End · 712 E Mckinley St+3 related filings
Site plan for 785-square-foot detached backyard unit approved in historic district
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 owner of 712 E McKinley St in Boise's historic district wants to build a new single-story detached accessory dwelling unit of about 785 square feet behind the existing single-family home. The plans also show a new sauna enclosure, patio and water feature on the 0.14-acre lot. City planning staff recommend approval.

New detached ADU in a historic district.

Project name on file: 712 E MCKINLEY ST - ADU

Timeline

  1. July 17, 2026

    Appeal Period: Completed

  2. July 6, 2026

    Hearing Review: Completed

  3. June 29, 2026

    Decision: Approved

    Hearing marked “Approved” on 2026-06-29.

  4. June 29, 2026

    Hearing: Approved

  5. May 18, 2026

    Hearing: Deferred

  6. May 11, 2026

    Review Complete: Completed

  7. May 11, 2026

    DR: Complete

  8. April 27, 2026

    Public hearing: Historic Preservation Commission

  9. April 22, 2026

    DR: In Review

  10. April 22, 2026

    Assign Reviewers: Completed

  11. March 31, 2026

    Fee Payment: Payment Received

  12. March 18, 2026

    Prescreen Review: Passed

  13. March 16, 2026

    Prescreen Review: In Progress

  14. March 13, 2026

    Application Submittal: ePlanReview

  15. March 13, 2026

    Application filed

Documents

Site plans

  • Architectural drawing index and abbreviations sheet for the project, listing cover, site plan, floor, elevation, section and structural sheets.

    April 23, 2026 · 1 page · 1.4 MB · PDS-Maps and Drawings

    Download Site plan cover sheet and drawing index

Plans

  • Revised ceiling and electrical plan sheets with a light fixture schedule, lighting and power key, and general notes from the architect's drawing set.

    June 21, 2026 · 1 page · 529 KB · PDS-Maps and Drawings

    Download Updated ceiling and electrical plans
  • Revised cover sheet for the architectural drawing set, with the drawing index, abbreviations and symbols legend, and the sheet list for architecture and structural drawings.

    June 21, 2026 · 1 page · 1.4 MB · PDS-Maps and Drawings

    Download Updated cover sheet
  • Revised architectural floor and roof plan sheet for the project, with dimensions, room labels, and roof overhang and setback notes, dated 05/26/2026.

    June 21, 2026 · 1 page · 531 KB · PDS-Maps and Drawings

    Download Updated floor and roof plans
  • Site drawing showing revised utility routing, including separate sewer and water lines and electrical service for the new accessory dwelling unit, with power lines to be buried.

    June 21, 2026 · 1 page · 1.5 MB · PDS-Maps and Drawings

    Download Updated utility plans
  • Site drawing showing lot layout, setbacks, property lines, and new and existing features such as an auxiliary dwelling unit, sauna, garden, and shed.

    May 4, 2026 · 1 page · 637 KB · PDS-Maps and Drawings

    Download Lot areas drawing
  • Elevation drawings for an accessory dwelling unit, sheet A.04, with a finish legend listing siding, trim, roofing, coping, and fence stain colors and materials.

    April 23, 2026 · 2 pages · 759 KB · PDS-Maps and Drawings

    Download Accessory dwelling unit elevations with finish legend
  • Architectural floor and roof plan sheet with dimensions, room labels, and setbacks for a dwelling, dated 3/31/2026.

    April 23, 2026 · 1 page · 493 KB · PDS-Maps and Drawings

    Download Floor plan and roof plan
  • Site utility plan showing existing and new water, sewer, electric and gas connections, including separate service lines for a new auxiliary dwelling unit (ADU).

    April 23, 2026 · 1 page · 1.3 MB · PDS-Maps and Drawings

    Download Utility plan and notes

Project narrative

  • Architect's letter describing a 786 square foot accessory dwelling unit, its low profile, shingle siding, window and door materials, and outdoor spaces.

    April 23, 2026 · 1 page · 507 KB · PDS-Letter of Intent

    Download Letter of explanation for accessory dwelling unit design

Staff reports

  • Planning Team staff report recommending approval of a Certificate of Appropriateness for a detached, single-story accessory dwelling unit in a historic design overlay zone.

    June 22, 2026 · 39 pages · 8.6 MB · PDS-Project Report/Memo

    Download Staff report for June 29, 2026 historic preservation hearing
  • Staff memo recommending approval of a Certificate of Appropriateness for a new single-story accessory dwelling unit in a historic design overlay zone, citing the city code and design guidelines.

    May 11, 2026 · 38 pages · 7.8 MB · PDS-Project Report/Memo

    Download Project memo for the May 18 historic preservation hearing

Decisions

  • Notifies the applicant that the Historic Preservation Commission approved the request for a Certificate of Appropriateness for a new single-story accessory dwelling unit, with conditions and appeal instructions.

    July 6, 2026 · 13 pages · 468 KB · PDS-Action Letter

    Download Action letter for the June 29 historic preservation hearing
  • The Historic Preservation Commission lacked a quorum on May 18, 2026, so the certificate of appropriateness request for a new single-story accessory dwelling unit was deferred to June 29, 2026.

    May 18, 2026 · 1 page · 138 KB · PDS-Action Letter

    Download Notice of deferral for the May 18, 2026 historic preservation hearing

Notices

  • Revised public hearing notice posted on the site for the certificate of appropriateness application.

    May 18, 2026 · 2 pages · 79 KB · PDS-Other Small Docs

    Download Updated site posting notice
  • Signed attestation that the subject property was posted at least fifteen days before the scheduled hearing, with photos submitted and signs to be removed within three days after the hearing.

    May 4, 2026 · 4 pages · 319 KB · PDS-Other Small Docs

    Download Statement of site posting for public hearing
  • Mailed notice of a May 18, 2026 hearing on a Certificate of Appropriateness for a new single-story accessory dwelling unit, with instructions for written and verbal testimony and appeals.

    April 28, 2026 · 2 pages · 974 KB · PDS-Legal Notice

    Download Notice of the May 18 Historic Preservation Commission public hearing

Application

  • Application form for a new detached accessory dwelling unit in a historic district at a contributing property, with applicant, owner and project details.

    March 13, 2026 · 6 pages · 182 KB · PDS-Application

    Download Certificate of Appropriateness application form

Photos

  • Photos of the existing front and rear of the house, the back yard, and the adjacent alley for the accessory dwelling unit proposal.

    April 23, 2026 · 4 pages · 652 KB · PDS-Photos

    Download Site photos of existing house and back yard

Correspondence

  • Boise Parks and Recreation has no comments on the application since no existing trees will be affected, but encourages planting one new Class I or II tree in the rear yard.

    May 11, 2026 · 1 page · 59 KB · PDS-Agency Comments

    Download Parks Department comments
  • Public Works says the property must connect to the central sanitary sewer, available in the adjacent alley, and sewer capacity fees may be due at building permit issuance.

    May 11, 2026 · 1 page · 65 KB · PDS-Agency Comments

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

    May 4, 2026 · 3 pages · 173 KB · PDS-Agency Comments

    Download Ada County Highway District comments
  • Letter telling the applicant that the Certificate of Appropriateness will be heard May 18, 2026, with posting, agency comment and ACHD contact instructions.

    May 4, 2026 · 1 page · 116 KB · PDS-Correspondence

    Download Notice of the May 18 Historic Preservation Commission hearing

Other documents

  • Aerial map

    April 28, 2026 · 1.7 MB · PDS-Maps and Drawings

  • Land use map

    April 28, 2026 · 467 KB · PDS-Maps and Drawings

  • Noticing radius map

    April 28, 2026 · 614 KB · PDS-Maps and Drawings

  • Zoning map

    April 28, 2026 · 468 KB · PDS-Maps and Drawings

  • Transmittal sheet

    April 24, 2026 · 136 KB · PDS-Transmittal Agencies

  • Statement of legal interest

    April 23, 2026 · 40 KB · PDS-Statement of Legal Interest

  • Receipt

    March 31, 2026 · 134 KB · PDS-Receipts

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