Room Addition in Eagle, Idaho

Room Addition cost in Eagle

Planning ranges for Eagle match the broader Treasure Valley market. As of 2026, room additions in the Boise area commonly plan $80,000 to $250,000 or more. Single-room bump-outs sit at the lower end; primary suite additions with bathrooms and second-story additions with structural upgrades reach the upper end.

These are planning ranges, not bids. Foundation, roof tie-in, and whether plumbing is included drive addition budgets, which we confirm in a written scope after your free in-home visit.

• Boise Remodeling Cost Guide

Room Addition across Eagle neighborhoods

We design and build room addition projects throughout Eagle, including Shadow Valley, Banbury, The Estates, Floating Feather. Housing stock varies between these neighborhoods, so we tailor layouts, structural details, and finish selections to the age and style of your specific Eagle home.

As a local team familiar with Eagle landmarks like Eagle Island State Park, Heritage Park, Eagle Hills Golf Course, we understand the character of the area and plan room addition work that fits the neighborhood and protects resale value.

Room Addition permits and planning in Ada County

Room Addition projects in Eagle that change layout, structure, plumbing, or electrical require permits through Ada County. We build plan review and inspection timelines into your schedule from day one and handle submissions, fees, and inspections as part of the design-build contract.

Our Eagle room addition designs also account for the local semi-arid with distinct four seasons - from insulation and ventilation choices to materials that hold up to Treasure Valley freeze-thaw cycles.

• Eagle remodeling contractor overview
• Ada vs Canyon County permit timelines