Business Details
29 Years
experience
Trusted Window & Door Solutions in Knoxville, TN
Marvin Concepts has been dedicated to delivering premium windows and doors since 1997, serving the greater Knoxville area with unmatched expertise. Our team combines over 27 years of industry experience with a commitment to quality, offering tailored solutions for residential, commercial, and historic restoration projects. We prioritize aesthetics, functionality, and value, ensuring every client receives personalized attention and innovative solutions. As a proud distributor of Sierra Pacific and Kolbe products, we provide energy-efficient, durable options that meet diverse architectural needs. Our collaborative approach with contractors, engineers, and designers ensures seamless project execution from concept to completion.Recognized for excellence in both new construction and restoration, we maintain rigorous standards to deliver products built to last. With a focus on integrity and customer satisfaction, we have established ourselves as a trusted leader in the window and door industry. Our services extend across four premier Southeast regions, supported by a team of certified professionals. From small residential upgrades to large-scale commercial installations, we combine craftsmanship with cutting-edge technology to exceed client expectations. This dedication to excellence has earned us national recognition for quality and innovation in every project we undertake.
Services
Replacement Windows
Commercial Doors
Historic Restoration
Custom Millwork
Energy-Efficient Solutions
Patio Sliding Doors
Bay & Bow Windows
Folding Windows
Entry Door Systems
Multi-Slide Doors
Details
- Year established: 1997
Highlights and features
- We offer 27+ years of specialized expertise in windows and doors.
- Our LEED AP-certified consultant ensures sustainable, code-compliant solutions.
- We provide made-to-order products with no shortcuts or compromises.
- Our team collaborates with architects and engineers for precision installations.
- We serve four Southeast regions with locally tailored expertise.
What people say
Exceptional craftsmanship
Expert installation team
Energy savings achieved
Historic accuracy maintained
Dedicated customer service
Services
Residential Windows
Custom replacement and new construction windows designed for energy efficiency and durability. Our made-to-order products enhance home aesthetics while reducing utility costs. Available in casement, double hung, and specialty styles to match any architectural design.
Commercial Doors
Heavy-duty commercial door systems built to industry standards. Features include ADA-compliant sills, reinforced frames, and seamless integration with building designs. Ideal for offices, retail spaces, and institutional projects requiring security and longevity.
Historic Restoration
Precision-matched windows and doors for historic buildings. Our team navigates federal and local conservation guidelines to preserve architectural integrity while meeting modern performance standards. Specialized in replicating non-standard designs and traditional materials.
Custom Millwork
Handcrafted windows and doors tailored to unique specifications. From geometric direct-glaze units to expansive multi-slide systems, we create bespoke elements that align with client visions and structural requirements without compromising quality.
Energy-Efficient Solutions
Advanced window and door systems designed to minimize energy loss. Features include Fusion Technology frames, low-E glass coatings, and airtight seals. Helps reduce heating and cooling costs while maintaining comfort and environmental sustainability.
People
Jonathan Mirts
General Manager, The Concepts Family of Brands
With over two decades in the window and door industry, Jonathan leads operations with a focus on innovation and customer satisfaction. He ensures strategic growth while maintaining the company's commitment to quality craftsmanship.
Don Stewart
General Manager, Installed Sales
Don oversees sales operations and project installations, leveraging his extensive experience in residential and commercial applications. He prioritizes client needs to deliver seamless service and superior product performance.
Mike St. John
LEED AP, Architectural Consultant & Sales Representative
As a LEED Accredited Professional, Mike specializes in sustainable design solutions. He collaborates with architects and builders to specify energy-efficient products that meet green building standards and project requirements.
Chad Bowers
Inside Sales Manager
Chad manages the sales team and client relations, ensuring accurate product specifications and timely project support. His expertise in window and door systems helps clients make informed decisions.
Casey Collins
Installed Sales Office Manager
Casey coordinates sales operations and project logistics, maintaining efficiency from order placement to installation. Her organizational skills ensure smooth communication between clients, vendors, and installation teams.
Questions
What areas do you serve?
We serve Knoxville, Nashville, Chattanooga, and Charlotte with local expertise in residential and commercial window and door solutions.
Do you offer historic restoration services?
Yes, we specialize in replicating period-accurate windows and doors while meeting modern energy efficiency standards for historic buildings.
What brands do you carry?
We are a certified distributor for Sierra Pacific and Kolbe, offering their full lines of premium windows and doors.
Are your products energy-efficient?
All products feature advanced insulation and sealing technologies to reduce energy consumption and lower utility bills.
Can I get custom-sized windows?
Yes, we provide made-to-order windows and doors tailored to unique architectural specifications and dimensions.
What are your business hours?
Our showroom is open Monday-Friday, 8:00 AM to 4:30 PM. Emergency service requests can be accommodated with advance notice.
