6224 Purple Sage Rd. Star, Idaho
SERVING BOISE · MERIDIAN · EAGLE · STAR · NAMPA. CALDWELL. MIDDLETON
Custom ADUs for Treasure Valley Homeowners
Rental Income, Family Space, or Both
25+ years building custom homes and additions in the Treasure Valley. Licensed, insured, and local — from your free consultation to your final walkthrough.
★★★★★ 5.0 on Google
WHY HOMEOWNERS ARE BUILDING ADUS RIGHT NOW
On July 1, 2026, Idaho's new ADU law (SB 1354) took effect, guaranteeing homeowners in Boise, Meridian, Nampa, and other Treasure Valley cities the right to add an accessory dwelling unit to their property — with fewer of the old roadblocks around parking, HOA restrictions, and owner-occupancy rules. If you've been putting off an ADU because you weren't sure it was allowed on your lot, now's the time to find out.
We'll walk you through what's actually possible on your specific property — for free.
Rental Income
Long-term rentals are permitted throughout the Boise area; a well-built ADU can meaningfully offset your mortgage.
Multigenerational Living
Keep aging parents or adult kids close, with their own private space.
Home Office or Studio
A dedicated space away from the main house, without a commute.
Increase Property Value
A permitted ADU is a real asset appraisers and buyers recognize.
WHAT WE BUILD
Detached, Attached, or Above the Garage — We Build ADUs That Fit Your Property
Not every lot works the same way, and not every ADU should look the same. We design and build:
-
Detached ADUs — standalone backyard cottages, fully independent from the main house
-
Attached ADUs — additions that share a wall with your home, often the more cost-effective option
-
Garage Conversions — turn existing square footage into a livable unit
Every ADU we build looks like it belongs — matched to your home's style, not a bolt-on structure.
01
Schedule your free consultation
Tell us a little more about your project and our team will reach out to schedule your free in home consultation. We'll use this opportunity to see the space, learn more about your ideas, and come up with a custom plan for how we can create your dream space together.
02
Finalize the plan
Our team of experts will take very detailed notes to make sure all of your wishes into account when we build your tailored plan for bringing your project to life. Once we have the plan ready for review, we’ll schedule a follow-up meeting to present this finalized plan to you for approval, ensuring you're completely satisfied with every detail before any construction begins.
03
Watch your dream come to life
This is where the magic happens! Our experienced team of craftsmen will begin the construction process, carefully executing each step of the plan we've created together. You’ll be kept in the loop every step of the way as your dream begins to take shape.
04
Adding the finishing touches
As the project is nearing completion, we will walk through the space together to make sure no details have been missed, and you are absolutely in love with the finished product.
05
Enjoy Your New Space
Once the project is complete, it's time to relax and enjoy the beautiful, functional space we've created together. From start to finish, we're committed to making your home feel exactly the way you've always envisioned.
WHY CHOOSE US
Comfort Expert Builders?
.png){kind=small}
25+ Years of Experience
With over three decades in the remodeling and construction industry, we've tackled just about every challenge a project can throw at us. That experience means we can anticipate issues before they arise, navigate complex renovations with confidence, and consistently deliver high-quality results. Whether it's a kitchen, bathroom, or a full home addition, we bring proven expertise to every job.
Custom Design & Build Approach
We don’t believe in one-size-fits-all remodeling. Every home—and homeowner—is different, which is why we take a personalized approach to each project. From layout and design to materials and finishes, we collaborate with you to create a space that reflects your lifestyle, aesthetic preferences, and budget. The result? A remodel that feels truly your own.
Transparent Communication
Renovations can be stressful—but they don’t have to be. Our team is committed to keeping you in the loop from day one. We’ll walk you through timelines, answer your questions promptly, and provide regular updates so you always know what’s happening and what comes next. No confusion. No guesswork. Just peace of mind.
Licensed, Bonded & Insured
Hiring a contractor is a big decision, and you should feel confident that your project is protected. Comfort Expert Builders is fully licensed, bonded, and insured, which means your home is in the hands of a qualified, reputable team that meets all legal and professional standards.
Local & Trusted
We’re proud to be part of the Treasure Valley community—and even prouder to have earned the trust of the homeowners we serve. Our reputation is built on word of mouth, repeat clients, and a long list of 5-star reviews. When you work with us, you’re working with neighbors who genuinely care about your home, your experience, and your satisfaction.
WHAT HOMEOWNERS ARE SAYING
Real Reviews from Real Treasure Valley Homeowners
★★★★★ 5.0 rating on Google
Cora W.
"Our ADU above the garage turned out better than we could have hoped for."
First-time construction project for this homeowner. They noted the team kept them updated at every step, worked to stay within budget, and handled an unexpected cabinet delay while still finishing close to the original timeline.
Reagan O.
"No unexpected costs or surprises."
This homeowner had a ~1,400 sq ft addition built above their garage, completed in about 3 months. They highlighted accurate estimating and consistent communication throughout the project.
Zach R.
"Good communication, reliability, and expertise."
A fellow Treasure Valley business owner recommending CEB as a business partner, specifically citing professionalism and dependability.
ADU Questions? Here's What Treasure Valley Homeowners Ask Us Most
What does an ADU cost in the Boise area?
Costs vary widely based on size, whether it's attached or detached, site conditions, and finish level — a garage conversion runs very differently than a ground-up detached unit. We'll give you a real, project-specific estimate after seeing your property, not a generic number that doesn't apply to your lot.
Can I even build one on my property?
As of July 2026, Idaho's new state law guarantees most homeowners in cities over 10,000 people — including Boise, Meridian, and Nampa — the right to build at least one ADU, up to their city's maximum allowed size. But your specific zoning, lot size, city, and (if applicable) HOA rules still matter. We build across the whole Treasure Valley, so we'll check the exact rules for your address as part of your free consultation, before you spend a dollar on design.
What's the permit process like, and how much does it cost?
Every ADU in Boise requires city approval through Planning & Development Services. Permit costs and timelines depend on your project scope. Because we build ADUs regularly in the Treasure Valley, we know what the planning department expects and can help you avoid the common delays — like footprint or setback issues — before they cost you time.
How long does an ADU project take?
Timelines depend on design complexity, permitting, and whether you're doing a conversion or new construction. We'll give you a realistic timeline specific to your project during your consultation, and keep you updated at every stage — no disappearing for months at a time.
Does my HOA get a say?
Sometimes, yes. City approval and HOA approval are separate — even where the city allows an ADU, older HOA covenants may still restrict it. We recommend checking your CC&Rs early, and we're happy to help you understand what you're looking at.
Can I rent out my ADU?
Long-term rentals are generally allowed in the Treasure Valley. Short-term/Airbnb-style rentals are more restricted. We can talk through what's realistic for your goals.
Get a Free ADU Estimate for Your Treasure Valley Property
Tell us a little about your property and what you're hoping to build. We'll research any zoning or permitting details for your specific address ahead of time, so your free consultation actually gets you answers — not just a sales pitch.