Dallas Architecture Firm

Welcome to Treanor Dallas: a multifaceted practice delivering smarter architecture
Our Dallas architecture firm sits within the lively Deep Ellum district, a vibrant entertainment district known for local music, performances, art shows, and more. Treanor’s Dallas, Texas office is a vibrant part of our national network—bringing innovation, technical experience, and design excellence to projects across Texas and the South-Central United States. As a multidisciplinary Dallas architecture firm, we specialize in justice, historic preservation, healthcare, higher education, housing (including Greek housing), site planning, and advanced industries.
Our Dallas-based team is known for its collaborative spirit, community-centered approach, and ability to deliver high-performing spaces that solve real-world challenges.
Justice architecture: designing facilities that serve and protect
Treanor is nationally recognized for its leadership in justice architecture, and our Dallas team brings this expertise to clients across Texas. We design a wide range of justice facilities, some of which include:
- Juvenile/youth facilities
- Courthouses
- Jails and detention centers
- Law enforcement and public safety buildings
- Justice campuses with integrated behavioral health
We approach each project with a focus on safety, dignity, and operational efficiency. Whether designing a new facility or renovating an existing one, Treanor’s Dallas-based architects help communities create justice spaces that support rehabilitation, reduce recidivism, and uphold public trust.
Historic preservation architects: restoring Texas heritage
Treanor’s Dallas office is home to experienced historic preservation architects who understand the importance of honoring Texas’s architectural legacy. In 2023, Dallas architecture firm McCoy Collaborative joined Treanor, bringing a shared passion for historic preservation and a strong local portfolio to the team. Treanor has enabled principals Nancy McCoy and Greg Johnston to expand the size and complexity of Texas projects, while maintaining the same dedication to excellence and community involvement. From historic courthouses and civic landmarks to educational and residential buildings, Treanor’s preservation experts blend research, technical knowledge, and creative design with local community advocacy.
Some of the services we offer:
- Preservation, rehabilitation, restoration, and adaptive reuse services
- Preservation planning, research, and documentation services
- Integration of modern systems into legacy structures
- Compliance with local, state, and federal preservation guidelines
With a respect for craftsmanship and a vision for longevity, our team helps clients preserve the past while planning for the future.

Deep Ellum was established in 1873 as a residential and commercial neighborhood. Originally called Deep Elm as the hub of activity centered around Elm Street, early residents pronounced it “Deep Ellum” which eventually gave rise to the district’s current name.
Healthcare architects: healing through intelligent design
Treanor’s healthcare architects in Dallas design medical environments that promote wellness, streamline operations, and support both patients and providers. We specialize in a wide range of healthcare typologies, including:
- Behavioral and mental health facilities
- Outpatient and specialty clinics
- Rehabilitation and wellness centers
- Senior and long-term care
Our designs emphasize natural light, accessibility, privacy, and efficiency. With deep sector knowledge and a human-centered approach, we deliver healthcare spaces that improve outcomes and enrich lives.
Higher education architects: supporting student success
Our Dallas office includes expert higher education architects who collaborate with universities and colleges across Texas and beyond. We design campus buildings that foster academic achievement, innovation, and connection, including:
- Classrooms and academic facilities
- Research and lab facilities
- Residence halls and student housing
- Student unions and learning commons
With a strong understanding of campus culture, we help institutions grow and adapt through strategic, future-ready architecture.

Greek housing architecture: designing for tradition and student life
Treanor is a national leader in Greek housing architecture, and our Dallas team brings this experience to campus communities across the region. We design sorority and fraternity houses that reflect chapter values, enhance student life, and foster long-lasting traditions.
Whether renovating historic Greek houses or designing new, modern residences, our team delivers high-performing, community-focused living environments that balance comfort, functionality, and identity.
Mission critical architect: advanced facilities for innovation
Treanor’s Dallas office supports high-tech, high-performance projects across advanced industries. As a mission critical architect, our team designs facilities that support cutting-edge research, manufacturing, and secure operations, some of which include:
- R&D labs
- Data centers
- Clean rooms
- Secure federal and industrial buildings
These complex environments require precision, coordination, and resilience—and our architects are experts in creating spaces that meet the highest technical and regulatory standards.
Site planning: grounded in performance and place
Our Dallas office also includes a skilled site planning team that supports every project with thoughtful, integrated design solutions for land use, infrastructure, and outdoor environments.
We offer:
- Grading and drainage design
- Stormwater management
- Accessible and pedestrian-friendly layouts
- Parking and circulation design
- Landscape architecture and placemaking
Whether shaping the grounds of a justice campus, university district, or healthcare facility, Treanor’s site planning professionals ensure that buildings work in harmony with the land—and the people who use them.
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