Best Home Addition Contractors Boise

Licensed & Insured

ID License #RCE-48419

5-Star Rated

Google Reviews

15+ Years

Remodeling Experience

Local Experts

Serving Treasure Valley

A mudroom with light wood flooring, sage green built-in storage cubbies, cabinets, and hooks on the walls. A window brings in natural light, and a closed door is visible in the background.

Modern bathroom with double sinks, wood cabinets, arched mirrors, wall sconces, and an additional built-in wood storage area under an arched nook. The design features neutral tones and a clean, minimalist style.

Enhance Your Boise Lifestyle with a Custom Home Addition

A thoughtfully designed home addition is a smart investment that improves your property’s value and your family’s quality of life. Whether due to growth or evolving lifestyle, an addition transforms how you live by creating purpose-built spaces from home offices and master suites to in-law suites. These new spaces enhance comfort, functionality, and home value. Freimark Construction specializes in seamlessly integrating additions with your existing architecture.

Create Purpose-Built Living Spaces Avoid the Cost & Hassle of Moving Strengthen Long-Term Investment Value Support Multi-Generational Living Modernize & Future-Proof Your Homes

Experienced Team

Our crew brings over 15 years of cross-trade expertise to ensure your addition is built correctly.

Custom Solutions

We design and build home additions that perfectly match your existing architecture and personal lifestyle.

Transparent Pricing

You receive detailed, itemized estimates with no hidden fees, so you always know your project costs.

Exceptional Craftsmanship

Our skilled craftsmen take pride in delivering superior workmanship, using premium materials and proven techniques to create bathrooms that stand the test of time beautifully.

Premium Additions in Boise Homes

We oversee every phase of your home addition project, from architectural planning to premium finishes and custom details. Our experienced team coordinates all elements of construction, ensuring flawless execution of design, materials, and craftsmanship. We partner with reputable local vendors to deliver high-quality products that align with your style and financial goals. From foundation to final inspection, we maintain transparent communication and careful oversight of each component. Your total satisfaction drives everything we do, and we support our work with a comprehensive 2-year workmanship guarantee.

Modern kitchen with white cabinets, gold handles, stainless steel oven, knife block, kettle, cookbook, and light wood flooring. The backsplash features light gray tiles and the space is brightly lit with recessed lighting.

Kitchen Expansions

We transform cramped kitchens into open-concept culinary centers, perfect for entertaining and daily family life.

A home gym in a garage with rubber flooring, weight racks, free weights, a bench, rowing machine, squat rack with weights, and storage shelves; exposed ceiling beams and a closed garage door are visible.

Garage Conversions

Convert your underutilized garage into a functional home gym, private office, or creative studio space.

A modern bathroom with marble walls and countertops, brass fixtures, a glass shower enclosure, and blue-green mosaic tile accents above the sink and inside the shower niche. Natural light enters from a skylight.

In-Law Suites

Create a private, comfortable, and independent living space for aging parents or long-term guests.

A bright sunroom with large windows, comfy armchairs, a wooden coffee table, a fireplace, and a potted plant. Snowy trees and mountains are visible outside through the glass walls.

Sunrooms or Enclosed Porches

Build a beautiful, light-filled space where you can enjoy Idaho’s scenery throughout all four seasons.

A modern home office with a wood-paneled wall, floating desk, ergonomic chair, computer setup, large window overlooking a green garden, shelves with books and plants, and a dome-shaped ceiling light.

Home Office Additions

Add a dedicated, quiet, and productive workspace that is perfectly designed to support your professional needs.

Our Home Addition Process

Consultation

We start by discussing your goals, functional needs, and budget to establish a clear project vision.

Design Planning

Our team creates detailed architectural plans and 3D renderings to integrate your new space seamlessly.

Construction

Our skilled craftsmen build with precision, ensuring a clean job site and consistent, clear communication.

Final Walkthrough

We conduct a final inspection with you to guarantee every detail meets our exacting quality standards.

Faq

Boise Home Addition FAQ's

How can I avoid cost overruns on a home addition?

Cost overruns are best avoided with clear planning, detailed design, and defined selections upfront. Finalizing layouts, materials, and finishes before construction begins reduces changes mid-project. Working with an experienced contractor and setting a contingency budget also helps manage unexpected conditions.

What are the steps in Boise’s permit review process?

Boise’s permit process typically includes plan submission, city review, revisions if needed, permit approval, and scheduled inspections during construction. Timelines vary based on project complexity and review workload. A qualified contractor usually manages this process and coordinates inspections with the City of Boise.

What factors affect a home addition construction timeline?

Timelines are influenced by design complexity, permitting, material lead times, and weather conditions. Structural work, utility upgrades, and inspections can add time, especially in older homes. Seasonal demand and subcontractor scheduling also impact overall duration.

What are budget-friendly ways to make a home addition look original?

Using matching rooflines, siding materials, window styles, and trim details helps an addition blend with the existing home. Repeating proportions and architectural details keeps costs down while maintaining a cohesive look. Thoughtful design can make an addition feel seamless without excessive customization.

Additions Blog

March 23, 2026

Is a Home Addition Worth It in Boise? Cost, ROI & Lifestyle Tradeoffs

Single-story light green house with large windows, well-kept lawn, stone walkway, and surrounding trees and shrubs on a suburban street in the early evening.

View All Blogs

Hear it from our clients

Ken

We hired Freimark for a bathroom renovation. The owner, Zach, was super easy to work with. Great communication. His subcontractors overwhelming did quality work and were very respectful of our home. The job finished about a week ahead of schedule (minus a shower door that took a little longer to manufacture than expected). He's probably not the cheapest in the valley, but you get what you pay for and his work was worth every penny.

Deb Mulligan

⭐️⭐️⭐️⭐️⭐️ We recently remodeled our master bathroom and hall bathroom with Freimark Construction, and we couldn’t be happier with the results. Zach was fantastic to work with—professional, organized, and committed to the highest standards of quality. He stands behind his work and made sure every detail was done right. On top of that, he’s a super nice guy and incredibly easy to work with, which made the entire process smooth and enjoyable. When we’re ready to move on to the next phase of our remodel, Zach will be the first person we call. Highly recommend!

Kyle Wagner

I couldn't be more impressed with Zach and his team. From start to finish the entire experience was seamless. They were professional, reliable, and delivered top-notch work on time and within budget as discussed. The quality was exceptional, and he paid close attention to every detail. What stood out the most was his clear and transparent communication - he was always available to answer my questions and kept me updated every step of the way. He was even kind enough to work around our pets that had to stay in the house. I also appreciated the clean workspace. Zach and all of his subcontractors were very diligent to pickup and clean the workspace before leaving for the day. If you have any home renovation project, I would call Zach, hands down, every single time.

Risa Seibold

We just completed a multi-room remodel with Zach at Freimark Construction. This was our fourth remodel in this house and Zach has been the best to work with of all. The project finished on time and within budget. Zach gave us a realistic, affordable budget and offered practical design ideas along the way. A great manager is proven when complications or questions arise during a project and here Zach really shines with a focus on making sure the client is happy. All the subs were great to work with as well and did an excellent job. Very satisfied and will use Zach again for any future projects!

Daniel Strunk

Top notch work. Very responsive.

Abbey Lyon

As both a professional architectural designer and a homeowner that has lived through a few of my own home renovations, I can honestly say that I've never had a better experience with a General Contractor, ever. Zach came to our initial meeting with a list of questions ready, demonstrating his attention to detail and expertise. He put together a very aggressive schedule for our whole home remodel, and though there were plenty of circumstances that would have justified a delay, Zach worked tirelessly to maintain his delivery date, showing up every day to check on progress, and even picking up his own tools rather than allowing tasks to slip. His quality control on the work was impeccable and exceeded my own expectations. He worked with me so respectfully and entertained my crazy ideas and questions. All of his subcontractors were so friendly and professional, I honestly miss having them here every day. If you are considering hiring him, don't hesitate; I could not be happier with the whole experience.

Erick Kwan

I had the pleasure of working with Zach from Freimark Construction on a small project at my home in Boise, and I couldn’t be more pleased with the results! Zach was professional, friendly, and knowledgeable. He took the time to listen to my ideas and offered practical solutions that improved the space. The work was completed quickly and efficiently. I highly recommend Zach and Freimark Construction for any project, big or small – I will definitely be reaching out for future work!

Matthew Vuoso

I recently received a proposal from Freimark Construction for a bathroom remodel, and I was thoroughly impressed with their professionalism and attention to detail. From the initial consultation, they took the time to understand my vision and provided a comprehensive, clear, and fair estimate. Zach was knowledgeable, patient, and offered helpful design suggestions that really enhanced my ideas. I felt confident in his expertise and commitment to delivering high-quality work.

Vlad D

Worked with Zach on removing a load bearing post in the middle of my garage to transform from 2 doors garage to a single door garage. From idea, to planning, engineering and execution Zach was great to work with and his team did a great job, keeping the job site clean, passing all inspections. I'm happy I got this project done with Zach and happy I can use my garage to park our family suv esp during the cold and rainy days of PNW!

C. Serv

We interviewed 5 contractors for our master bathroom remodel, and Freimark Construction was our choice. I have so many great things to say about Zach Freimark - he is attentive to detail, has excellent communication skills, is quick to respond to texts and emails, hires competent subcontractors, and most importantly keeps to the schedule! It was a 6 week project that went so smoothly, from complete demolition, to building a new walk in shower, installing new vanity, flooring, paint, rerouting heating registers, installing new fans and lighting. We couldn’t be happier with how the project turned out. We intend to hire Freimark Construction for future projects.

Freimark Construction

Ready to Expand Your Home

Let’s create a seamless, functional home addition designed for the way you live. Contact us today to get started.

OUR LOCATION

Connect With Us

We are available for in-person meetings at our office, as well as phone, email, or video consultations.

Freimark Construction

776 E. Riverside Dr. Ste. 204, Eagle, ID 83616

Mon – Fri, 9:00 AM – 5:00 PM

zach@freimarkconstruction.com

(208) 810-0874

Virtual & Remote Consultations: We are equipped to meet via video call or phone to keep your project moving.

Custom Home Additions Built for Boise Homeowners

Licensed & Insured

5-Star Rated

15+ Years

Local Experts

Enhance Your Boise Lifestyle with a Custom Home Addition

The Freimark Construction Difference

Experienced Team

Custom Solutions

Transparent Pricing

Exceptional Craftsmanship

Premium Additions in Boise Homes

Kitchen Expansions

Second Story Additions

Garage Conversions

In-Law Suites

Sunrooms or Enclosed Porches

Home Office Additions

Our Home Addition Process

Consultation

Design Planning

Construction

Final Walkthrough

Faq

Boise Home Addition FAQ's

Additions Blog

Is a Home Addition Worth It in Boise? Cost, ROI & Lifestyle Tradeoffs

Hear it from our clients

Freimark Construction

Ready to Expand Your Home

OUR LOCATION

Connect With Us

Freimark Construction