Seamless Home Additions Designed to Fit Your Life
Serving St Louis & Surrounding Areas
Comprehensive Design-Build Additions
From initial vision to a move-in ready space
C3 Contracting LLC plans and builds additions that integrate structurally and stylistically with your existing home. We align foundations, load paths, and rooflines; extend mechanical, electrical, and plumbing systems; and prioritize envelope performance and energy efficiency so the new space looks original and lives better.
With a true design-build approach, you get a single point of accountability from concept through completion. We provide permit-ready drawings, detailed scopes, 3D visuals, and value-engineered solutions for primary suites, kitchen expansions, second-story additions, family rooms, sunrooms, garages, and more.
Master woodworking integrated into every detail
Led by a master woodworker, our team blends precision framing with fine finish carpentry to deliver architectural continuity. We custom-match profiles, species, and finishes for trim, doors, stair systems, built-ins, paneled walls, and beams so your addition feels cohesive down to the smallest reveal.
We also offer custom woodworking services as a dedicated offering, including bespoke cabinetry, mantels, millwork, furniture-grade built-ins, and architectural elements. Whether as part of your addition or as a standalone project, our shop-quality craftsmanship elevates every room.
Clear communication, precise execution
Discovery and design begin with understanding your goals, budget, and timeline. We perform site evaluations, assess structure and utilities, review code and zoning constraints, and develop a design package with floor plans, elevations, and material options tailored to how you live.
In preconstruction, we finalize specifications, selections, and allowances, then deliver transparent, line-item estimates and a realistic schedule. Early procurement of long-lead items and proactive coordination with engineers and inspectors keeps the project on track.
During construction, we maintain clean, safe job sites with occupied-home protocols, daily updates, and milestone check-ins. Your project concludes with detailed punch list completion, warranty documentation, and a care guide for finishes and systems.
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Serving Homeowners Near You
Local knowledge, faster approvals, smoother builds
Our experience with regional building practices and permitting helps streamline addition projects in St Louis, aligning designs with neighborhood character while meeting current codes and energy standards.
Material sourcing and craftsmanship are tailored to the architectural styles common across St Louis, ensuring new spaces blend seamlessly with existing homes, from historic details to contemporary finishes.
You can expect responsive communication, on-site management, and trustworthy references from past projects completed in St Louis, giving you confidence from the first consultation through final walkthrough.
Locally Owned
Master Woodworker
Free Estimates
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