Accessory dwelling units add livable square footage, rental income potential, and long-term property value without leaving your lot. Boise Remodeling Co designs and builds detached and attached ADUs with full permit handling, structural planning, and interior finishes under one accountable design-build team.
ADU & Guest House Construction in the Treasure Valley
Accessory dwelling units add livable square footage, rental income potential, and long-term property value without leaving your lot. Boise Remodeling Co designs and builds detached and attached ADUs with full permit handling, structural planning, and interior finishes under one accountable design-build team.
Planning from$90k·Your exact range is confirmed at the free in-home visit
Why homeowners choose us
- Single team from design through certificate of occupancy, no coordinating separate trades
- Ada and Canyon County, ADU permitting and setback requirements handled in-house
- Rental-ready finish packages designed, for durability and appeal
- Exterior materials and rooflines, planned to complement your existing home
What's included
- Site feasibility evaluation and setback review
- Foundation, framing, and structural engineering
- Plumbing, electrical, and HVAC for a fully self-contained unit
- Kitchen and bath fit-out with finish selections guidance
- Permit coordination and final inspection through certificate of occupancy
Our process,
step by step
Site visit and feasibility
We review your lot, setbacks, utility access, and HOA rules to confirm the ADU approach that works best.
Design and engineering
Plans are drawn to meet code, match your property, and maximize livability within your investment target.
Permitting and construction
We file permits and manage every trade from foundation through finish with weekly written updates.
Inspections and closeout
Final inspections are coordinated and we walk through every detail before handoff.
Typical timeline
Most ADU projects run 4 to 7 months from design through certificate of occupancy, depending on unit size, site conditions, and permit timelines.
ADU cost in the Treasure Valley
As of 2026, garage conversions in the Boise area typically plan $90,000 to $180,000. Attached ADUs and basement conversions plan $120,000 to $250,000, and detached new-build ADUs plan $180,000 to $300,000 or more depending on size, utility connections, and finish level.
These are planning ranges, not bids. Site conditions and utility strategy drive ADU budgets more than any other project type, which is why feasibility review comes first in our process.
ADU / Guest House across the Treasure Valley
We provide adu / guest house services throughout the Treasure Valley, with dedicated local pages for each city we serve. Permit paths, housing stock, and HOA requirements differ between Ada and Canyon County communities, so each city page covers the details that matter where you live.
Choose your city below to see local adu / guest house guidance, or schedule a free in-home consultation to discuss your project directly.
Why design-build for your adu / guest house
As a design-build remodeler, we bring design, estimating, permitting, and construction under one contract and one accountable team. That removes the handoffs and finger-pointing that happen when a separate designer and general contractor are involved - and it keeps your adu / guest house on a single, coordinated schedule.
You get a written scope before construction begins, clear allowances for selections, proactive communication throughout the build, and a workmanship guarantee when the project is complete.
Frequently asked questions
Ready to begin?
Free 60 to 90 minute in-home visit. Planning guidance, design direction, no obligation.