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Planning commission approves 256-square-foot attached ADU at 900 Mountain Street

5075331 · June 25, 2025
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Summary

Carson City Planning Commission approved a special use permit for a 256-square-foot attached accessory dwelling unit at 900 Mountain Street, finding it meets development standards and subject to eight staff conditions.

The Carson City Planning Commission on June 25 approved a special use permit for a 256-square-foot attached accessory dwelling unit at 900 Mountain Street, near Sayers Park, after staff and the applicant confirmed the proposal meets zoning and development standards.

The approval covers an attached studio-style ADU with a bathroom, kitchenette and a covered porch on a property zoned Single-Family 6,000 (SF6). Heather Farris, senior planner, told the commission the project must comply with Division 1.4 of the Carson City Development Standards and staff recommended approval subject to eight conditions. “The staff report contains an analysis of how the ADU meets this standard, these standards, including requirements that the ADU be attached, the size limitations of the ADU, the required parking and the requirement for the ADU to be consistent and compatible with the design and materials of the main residence,” Farris said.

Applicant Megan Trumble confirmed she would accept the eight conditions of approval. Commissioner questions focused on construction impacts and access; one commissioner asked whether construction hours had been discussed and Farris said that construction-hour limitations are typically set with tentative maps but could be added as a condition. Commissioners also confirmed that because the lot is under 2,100 square feet the ADU must be attached and noted the unit (256 square feet) is smaller than the 700-square-foot maximum that could be permitted for similarly constrained lots.

Commissioner Pozell moved to approve the special use permit LU2025-0192 based on the staff findings and subject to the staff conditions; Commissioner Crone seconded. The motion carried by voice vote.

The permit approval is limited to the site plan and the conditions in the staff report; any future building work must obtain required building permits and comply with applicable codes.

Details: property at 900 Mountain Street (APN 121301), accessory dwelling unit size 256 square feet; zoning SF6. Conditions include consistency with Division 1.4 of the Carson City Development Standards and several site-specific requirements listed in the staff report.

The commission did not impose a separate construction-hours restriction at the hearing but indicated it could consider adding one if warranted.