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ARCHitecture Trio was founded in 2001 with the objectives of excellence in contextual design and client satisfaction. These goals are achieved through our strength in creating sympathetic design solutions within an existing context. By utilizing and responding to the surrounding environment, we create compatible, aesthetically vibrant, responsible, and functional designs. We focus on client needs through analysis with insight and respect for how the context influences and is influenced by our work. 

As we enter into our third decade, Architecture Trio is excited to broaden our capacity and ability to develop truly cohesive design solutions through the addition of interior design services to complement our specialties in architecture and historic preservation. 



  • Commercial New Construction

  • Renovation and Restoration

  • Supportive Housing

  • Feasibility Studies

  • Multi-Family Residential 

  • Single Family Residential New Construction

  • Residential Renovation and Addition Design


  • Hospitality Design

  • Public Spaces

  • Multi-Family Residential

  • Single Family Residential

  • Pre-K through 12th Grade Educational


  • Adaptive Reuse

  • Historic Rehabilitation Tax Credit Applications

  • Section 106 Consultation

  • Main Street Revitalization Projects

  • Downtown Revitalization Planning

  • Feasibility Studies

  • Building Material Analysis

  • Historic Structure Reports

  • Local Review Boards

  • Conditions Assessments

  • National Register of Historic Places Nominations

  • Historic Design Guidelines

  • Capital Needs Assessments

  • Façade Studies

  • Preservation Planning

  • Historic District Designation



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Patricia L. Jacobs RA


Pat has built a career from her longtime interest in historic preservation and architecture. She graduated from Ball State University with her professional degree in Architecture and a Bachelor of Science in Environmental Design. Her work has demonstrated the impact of historic preservation in rebuilding of neighborhoods and the renovation and reuse of significant historic buildings.

With over thirty years of experience specializing in the unique aspects of contextual design and historic preservation, Pat takes great pride in her ability to provide professional services that enhance our communities, preserve our built environment, and enrich the lives of individuals. 

Splitting her time between Indiana and Montana, Pat is involved in a variety of professional and preservation related organizations, and enjoys spending time with her granddaughters, baking, and exploring the outdoors. 

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Stephen C.B. Allen RID, NCIDQ, RAH


Stephen spent the beginning of his career focused on hospitality/restaurant design and high-end custom interiors.  He has helped create many well-received interior spaces in the Indianapolis area.  As his career has evolved, he has been able to offer his experience with architectural reuse and preservation to assist our clients in facilitating a wide breadth of project types.


With an undergraduate degree in Architecture and professional degrees in Historic Preservation and Interior Design, he brings with him a uniquely diversified background which allows him to see the possibilities of a project through multiple lenses, offering the client a unique design experience.

Stephen is a Registered Architectural Historian and a Registered Interior Designer in the State of Indiana.

He enjoys camping on the weekends, working on projects around his 100 year old house, and travelling whenever possible.

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Laurel R. M. Tobin RID, NCIDQ, RAH


Laurel graduated with her Bachelor of Science in Interior Design Technology from the Purdue School of Engineering and Technology at IUPUI in 2018. Since then, she has gained experience in historic preservation and reuse, and has had opportunities to work in hospitality, multi-family, and education design. She achieved her NCIDQ and became a Registered Interior Designer in 2021. Never ready to rest on her laurels, she completed her Master's of Science in Historic Preservation at Ball State University in 2022.

Her varied background, combined with her history of community involvement, technological skills, and eye for detail, allows her to provide clients with individualized designs ideally suited to their needs. 

In her free time, Laurel enjoys volunteering with the Indianapolis design community and her church, reading vintage British mystery novels, exploring museums, and hunting for the best local coffee.

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