Variance · Planning application
Nampa approves duplex conversion of single-family home on oversized lot
The City Council approved a variance on April 20 to turn a home's basement into a second unit within the existing building. The lot is slightly over the 9,000-square-foot duplex maximum. A remodel permit is required before work begins.
From the filing
The application's description as it appears in City of Nampa's record. See the official record
The owner of a single-family home with a basement at 204 18th Ave S in Nampa wants to convert the basement into a second, attached dwelling unit, making the building a duplex. The work stays within the existing building footprint on a 0.23-acre lot about two blocks from downtown. The lot is slightly larger than the 9,000 sq. ft. maximum the city code allows for a duplex in this zone, so a variance was needed.
Requesting a variance to convert a single-family home into a duplex in RMH zone on a lot that is too large for a duplex.
Project name on file: Morales Duplex Lot Size
Timeline
May 8, 2026
12 documents added
April 22, 2026
City Council Decision/Action Letter
April 20, 2026
Decision: Approved
Nampa City Council: Approved.
April 20, 2026
Public hearing: Nampa City Council
April 15, 2026
Notice to Area Property Owners
March 13, 2026
Notice to Agencies/Departments
Feb. 26, 2026
Assess Fees (Variance)
Feb. 19, 2026
Plan Intake Passed
Feb. 19, 2026
Application filed
Feb. 19, 2026
Accepted for review
Documents
Site plans
- Download Site plan for lot size variance
One-page site plan filed with a variance application for the lot size; the extracted text is only sheet dimensions and a street label, so little more can be confirmed.
Feb. 19, 2026 · 1 page · 138 KB · Site Plan
Project narrative
- Download Applicant narrative supporting duplex lot size variance
Applicant letter requesting a variance from the 9,000 sq ft maximum lot size for a duplex in the RMH zone, citing an existing structure suited to two units and four on-site parking spaces.
Feb. 19, 2026 · 1 page · 53 KB · Narrative
- Download Pre-application meeting notes on duplex conversion and lot size
Staff notes from a Jan. 28, 2026 pre-application meeting on converting a single-family home to a duplex, flagging that a variance is required because the lot is large enough for a triplex.
Feb. 19, 2026 · 2 pages · 185 KB · Pre-App Mtg Notes
Staff reports
- Download Staff report on lot size variance for duplex conversion
Staff report to City Council on a variance from the RMH 9,000 sq. ft. maximum lot size to convert a basement into a second unit, with zoning and setback regulations.
April 15, 2026 · 26 pages · 5.7 MB · Staff report for CC
Decisions
- Download Recorded variance permit for lot size, duplex conversion
Recorded City of Nampa variance permit allowing a basement conversion of a single-family dwelling to a duplex on a lot exceeding the RMH maximum, with three conditions and a six-month expiration.
May 8, 2026 · 2 pages · 149 KB · Recorded Permit #2026-017934
- Download City Council variance approval decision letter
Letter notifying the applicant that City Council approved a lot size variance for a basement-to-duplex conversion, with three conditions and a 14-day reconsideration window.
April 22, 2026 · 16 pages · 4.8 MB · CC Decision Letter 04/22/2026
Application
- Download Variance application for Morales duplex lot size
Master application for a variance to lot size for a proposed duplex project, filed with the City of Nampa Planning and Zoning Department.
Feb. 19, 2026 · 2 pages · 1.8 MB · Application
Other documents
- Variance checklist for lot size
Feb. 26, 2026 · Checklist
- Affidavit on duplex lot size
Affidavit filed with the variance request concerning the lot size for the proposed duplex.
Feb. 19, 2026 · Affidavit
- Deeds and property information for lot size variance
Deed and property records submitted with a variance request for lot size related to a duplex.
Feb. 19, 2026 · Deeds & Property Information
- Legal description for duplex lot size variance
Feb. 19, 2026 · Legal Description - Word
- Site and vicinity maps
Feb. 19, 2026 · Site & Vicinity Maps
