Room Addition in Star
Room additions expand living space without moving. We design attached additions, in-law suites, and bonus rooms that match your roof lines, foundation, and interior architecture, with permits and structural scope handled professionally.
Services
Home Additions in the Treasure Valley
Room additions expand living space without moving. We design attached additions, in-law suites, and bonus rooms that match your roof lines, foundation, and interior architecture, with permits and structural scope handled professionally.
Planning from$95kYour exact range is confirmed at the free in-home visit
A CLEAR SCOPE
Plan the details.
Know the next step.
- 01Feasibility and site evaluation
- 02Foundation and framing
- 03Roof tie-in and exterior finish
- 04Interior finish to match existing home
- 05Permit and inspection coordination
Why choose us
Why homeowners choose us
- 01
Structural and architectural planning
before breaking ground
- 02
Exterior materials matched to
your existing home
- 03
Clear permit path for
Ada and Canyon County
- 04
Integrated HVAC and electrical planning
Design inspiration
See the possibilities
Explore a design direction for your own home. Final layouts and materials are tailored to your property.
Master Suite Addition
Addition design inspiration. A buildable layout depends on the existing home, site, and engineering.
How it works
Our process, step by step
01
Site visit
We review setbacks, access, and structural implications.
02
Design and engineering
Plans address code, loads, and aesthetic match.
03
Construction
Foundation through finish with weekly communication.
04
Inspections and closeout
We coordinate final inspections and walkthrough.
Planning details
Typical timeline
Additions vary widely; many projects run 3 to 5 months from design through certificate of occupancy.
Room addition cost in the Treasure Valley
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.
Room Addition across the Treasure Valley
We provide room addition 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 room addition guidance, or schedule a free in-home consultation to discuss your project directly.
Why design-build for your room addition
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 room addition 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.
Planning your budget
What might your project cost?
Get a preliminary planning range based on real Treasure Valley remodel costs, with no obligation.
Get an estimateFree · Not a binding quote
- 01Based on real Treasure Valley project costs
- 02Project details reviewed by our team
- 03Additional details or a site visit may be needed
Common questions
Frequently asked questions
Start your project
Ready to begin?
Free 60 to 90 minute in-home visit.
Planning guidance, design direction, no obligation.