From custom decks and 4-season porches to full interior remodels, siding, and additions — we bring over 45 years of hands-on craftsmanship to every home. No job is too big or small!
Whether you are expanding your living space or refreshing an existing room, C-n-J Construction brings the skills, materials, and attention to detail required for lasting results.
Outdoor Living
Hand-crafted cedar and composite decks designed for Wisconsin and Midwest seasons. Multi-tier decks, railing systems, stairs, and covered outdoor living spaces.
Explore Deck Options
Signature Specialty
Expand your square footage with an insulated, light-filled 4-season porch or room addition. Timber framing, log siding, and seamless roofline integration.
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Interior
Full-scale kitchen renovations, bathroom transformations, tile work, custom cabinetry installations, and modern layout modifications.
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Construction
Complete structural carpentry from ground-up additions to detached garages, roof trusses, wall framing, and home expansions.
View Framing Details
Basements
Transform unused basement space into comfortable living areas, rec rooms, and guest suites with durable luxury vinyl plank or hardwood flooring.
Basement Services
Exterior Envelope
Protect your home and boost curb appeal with weather-tight siding installations, energy-efficient replacement windows, exterior doors, and roofing.
Exterior UpgradesDrag the interactive slider to compare the raw demolition stage with the completed living space — featuring restored brick masonry, custom millwork, and wainscoting.
Completed Renovation
Demolition Stage
An extraordinary custom project built by C-n-J Construction. Designed and framed to integrate seamless timber-log construction with modern energy efficiency, a second-story walkout, and stone accents.
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From your initial concept to the final walkthrough, here is how Charles Johnston delivers high-quality, stress-free construction for your home.
Charles visits your property in Blair or the Coulee Region to review your ideas, inspect structure, and discuss your design and budget goals.
You receive an honest, transparent estimate outlining material specs, labor, and realistic start dates. Zero hidden costs or sales pressure.
We coordinate municipal permits and procure top-tier materials (hand-selected cedar, composite decking, low-E windows) built for Wisconsin climate.
Charles and the team manage the build hands-on with 45+ years of carpentry knowledge, daily job-site cleanup, and steady communication.
We review every detail together until you are 100% satisfied. We stand behind our work because our Coulee Region reputation is our livelihood.
Established in 2001 by Charles Johnston, C-n-J Construction was founded on a simple principle: treat every customer and home with the highest degree of respect, whether the job is spending hundreds or tens of thousands of dollars.
Charles brings more than 45 years of hands-on construction experience directly to your job site. That means experienced problem-solving, honest quoting, and meticulous attention to structural integrity and finish quality.
Over 20 years of satisfied clients throughout the Coulee Region and beyond.
"Charles has done numerous projects for me over the past 5 years, including interior remodeling, window replacement, and roofing. There are many reasons I continue to recommend him to my friends: communication, quality of work, honesty, fair price, and dependability. I know the job will be done right, at the quoted price, and on schedule."
"Because of his years of experience working on a wide variety of projects, large and small, Charles was able to come up with creative solutions to every challenge my old house had to offer. From the roof, to the sagging garage, to the new windows, to the totally renovated kitchen and more, my experience with C-n-J Construction has been a very positive one."
"Charles' work far exceeded our expectations and he stayed within our budget helping us fulfill our dreams and more. He is and will be the only one we will consider for any and all future projects. The quality of his work and service is second to nobody."