Keen Construction

Keen Construction is a custom home builder and remodeling contractor headquartered in Frankfort, Illinois, serving homeowners throughout the Southwest Chicago suburbs. Backed by more than 35 years of multi-generational building experience, the company specializes in Accessory Dwelling Units (ADUs), custom homes, home additions, remodeling, basement finishing, attic conversions, outdoor living spaces, and land development. Keen Construction is known for its “No Surprises” building philosophy, emphasizing transparent communication, meticulous craftsmanship, and a structured design-build process.

As a design-build contractor, Keen Construction manages every phase of an ADU project—from site evaluation, feasibility analysis, and custom design through permitting, utility coordination, construction, inspections, and final occupancy. The company designs each ADU to complement the existing residence while meeting local zoning and building requirements, helping homeowners create flexible spaces for family living, rental income, guest accommodations, or home offices.

Services

• Accessory Dwelling Units (ADUs)
• Detached ADUs
• Attached ADUs
• Custom Home Construction
• Knockdown & Rebuild Projects
• Home Additions
• Kitchen Remodeling
• Bathroom Remodeling
• Basement Finishing
• Attic Conversions
• Outdoor Living Spaces
• Deck Construction
• Sunrooms
• Porches
• Land Development
• Site Evaluation
• Permit Coordination
• Design-Build Services
• Construction Management
• Residential General Contracting

Why Choose Keen Construction?

• Over 35 years of multi-generational building experience
• Full-service design-build contractor
• Specialists in custom homes and ADUs
• Proven “No Surprises” project management process
• Handles design, permitting, and construction
• Personalized guidance from concept to completion
• Strong expertise in Chicagoland zoning and permitting
• High-quality craftsmanship with in-house finish carpentry expertise
• Transparent communication throughout every project
• Complimentary initial consultation