Architecture Firm in Sioux City, IA
About
Stone Group Architects became part of the Sioux City community in 2018 through the merger with M+ Architects, a respected local firm founded by Dale McKinney. Since then, our Sioux City office has continued a strong legacy of service, contributing to the city’s growth and revitalization through thoughtful, high-quality architectural design.
As architects in Sioux City, we proudly serve the tri-state region with a wide range of services, including municipal, state, commercial, recreational, and federal design. Our work spans adaptive reuse, historic preservation, and large-scale civic and community spaces. Notable Sioux City projects include the award-winning Motor Mart / Bluebird Flats, Siouxland Expo Center, and the historic Benson Building restoration.
Stone Group Architects is a Service-Disabled Veteran-Owned Small Business, we’re grounded in our mission to serve those who serve others. We bring a collaborative, client-focused approach to every project, working together to create environments that are functional, sustainable, and built to last.
Whether you’re planning a new development, renovation, or preservation project, our Sioux City architecture team is ready to collaborate and bring your vision to life.
Featured Projects

Siouxland Expo Center

BENSON BUILDING ADAPTIVE REUSE
Sioux City Office
117 Pierce Street, Suite 110, Sioux City, IA 51101
712.252.4014
Hours
Monday - Thursday 8am - 5pm
Friday - 8am - 12pm
Frequently Asked Questions About Stone Group in Sioux City, IO
What types of architecture projects does Stone Group Architects design in Sioux City?
Stone Group Architects' Sioux City team works across municipal, state, commercial, recreational and federal projects, with additional experience in adaptive reuse, historic preservation and large-scale civic and community spaces. Notable local projects include the Seaboard Triumph Foods Expo Center, Motor Mart Building (Bluebird Flats) and the Benson Building restoration (Benson Lofts).
How long has Stone Group Architects been in Sioux City?
Stone Group Architects became part of the Sioux City community in 2018 through a merger with M+ Architects, a respected local firm founded by Dale McKinney. The merger brought an established Sioux City practice into SGA and expanded the firm's regional capabilities.
What architecture and interior design services does Stone Group Architects offer in Sioux City?
SGA provides architecture, interior design, master planning, facility planning and design services for new construction, renovations, adaptive reuse and preservation projects. Our Sioux City team serves clients throughout the tri-state region.
Does Stone Group Architects have experience with historic preservation and adaptive reuse in Sioux City?
Yes. Historic preservation and adaptive reuse are significant parts of SGA's Sioux City portfolio. Projects such as the Benson Building and Hatch Montgomery Ward Building demonstrate our ability to preserve historic character while adapting existing structures for modern residential, commercial and mixed-use purposes.
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Contact our team to discuss your goals, challenges and next steps.


