Architect · Researcher · Educator

Architecture is experience.

Devan Castellano designs spaces around how people actually live inside them — grounded in doctoral research on environment and behavior, biophilic design, and two decades of teaching human-centered design.

Devan Castellano, Principal of Devan Castellano Design Group

About

Devan Castellano's introduction to experiential design came early in a career designing retail spaces for Crate & Barrel — work built entirely around how a shopper moves through, notices, and responds to a space. That observation turned into a genuine research question while teaching sustainability at Harrington College of Design, and eventually into doctoral studies in Environment and Behavior at the University of Wisconsin–Madison: how does the built environment actually shape the people inside it? That question has shaped every project since — first in practice, then in the classroom.

In practice, that question has shaped more than two decades of built work across a wide range of typologies — office spaces and lobbies, learning environments, yoga and fitness studios, spas and IV bars, hospitality interiors, and single- and multi-family residences.

That same research lens carries directly into teaching and consulting. As a Sustainability and Biophilic Design Mentor at Harrington College of Design, Castellano guided designers toward buildings that work with — rather than against — human biology and behavior. As a LEED Accredited Professional, that expertise extends into sustainability consulting, translating certification requirements into design decisions that hold up under real, daily use. And as a Human-Centered Design instructor at New Trier High School, the same principles shape project-based classrooms, where students design for real stakeholders instead of hypothetical ones.

Different typologies, same conviction: architecture's job is to create a supportive environment through experiential design — one that measurably improves the life of the person standing inside it.

View Full CV & Project List (PDF) →
01

Doctoral Studies, Environment & Behavior

University of Wisconsin–Madison — Researcher

02

Sustainability & Biophilic Design Mentor

Harrington College of Design

03

LEED Accredited Professional

Sustainability Consulting

04

Human-Centered Design Instructor

New Trier High School

“Good architecture isn't just seen — it's lived in, worked from, learned in, and healed by.”

Selected Work

Grounded in Environment & Behavior Research

Living Environments

Homes designed around how people actually move through daily life — from new single-family construction and net-zero performance homes to multi-family communities and condominium renovations. Each project starts with what a space needs to feel like, not just look like.

New Construction Net-Zero Homes Single-Family Residential Multi-Family Residential Condominium Renovation

Project spotlight

The Tree Hugger House

Net-zero ready new construction

The owners fell in love with an old Victorian but wanted a home efficient enough to pass down for generations. On a lot shaded by massive old trees, the oldest stood right where the house would go. Instead of removing it, we shaped the entire footprint around it, keeping construction clear of its roots, and turned every room toward the surrounding suburban forest. A turret, wraparound porch and deep bay windows carry the Victorian spirit. Behind them is a net-zero ready home, and the first in the Midwest to use radiant cooling panels.

  • PerformanceNet-zero ready
  • InnovationFirst Midwest home with radiant cooling panels
  • RecognitionFeatured on the Solar Home Tour
  • BuilderShaffer Construction

Human-Centered Design in Practice

Working & Learning Environments

Offices, classrooms, and religious and community institutions designed around how people concentrate, collaborate, and grow. This work draws directly on Human-Centered Design training — spaces are shaped around real routines and real users, not assumptions about them.

Commercial Office Educational & Institutional Religious Institutions Classroom & Learning Environments

Project spotlight

Winnetka Congregational Church

Office wing and education wing

Winnetka Congregational Church asked us to renew two wings of its historic building: the church office and the religious education classrooms. The design starts from the building itself, carrying its white millwork, classical proportions and the brass and navy of the sanctuary’s sunburst chandelier into a light, contemporary interior. In the office wing, a gently sloped 1:20 ramp and widened vestibule make the entry fully accessible, and two directions were explored: a hushed, grounded workplace with a fireside nook, and a warm, open welcome built around a greeter’s desk and communal table. The classroom wing favors flexibility and biophilic calm, with barn doors or an operable wall that join rooms for larger gatherings, acoustic ceiling clouds, and color tuned to each age group.

  • ClientWinnetka Congregational Church
  • ScopeOffice wing renovation and education wing refresh
  • AccessibilityADA entry with a 1:20 ramp and widened vestibule
  • StatusSchematic design, 2026
  • LocationWinnetka, Illinois

Biophilic Design + LEED Consulting

Restorative Environments

Spas, fitness studios, and amenity spaces designed to actively restore, not just accommodate. Biophilic design principles and sustainability consulting meet here — daylight, material, and air quality treated as design tools, not afterthoughts.

Spa & Wellness Restorative Design Fitness & Amenity Spaces Hospitality Renovation Sustainable / LEED Design

Project spotlight

Halo Day Spa

Salon and day spa

Halo Day Spa in Schaumburg brings a full-service salon and a day spa together under one roof, and we are working with owner and esthetician Heather Walker to give each floor its own pace. The first-floor salon is bright and open, with styling stations set along tall windows so daylight and greenery frame every chair. Upstairs, the day spa slows everything down: a softly lit relaxation lounge in blush and mauve, layered with textured wallcoverings, velvet chaises, warm wood and candlelight, opens directly to the treatment rooms. The result is warm, inviting and quietly feminine, a place designed to restore, not just accommodate.

  • ClientHalo Day Spa
  • OwnerHeather Walker, esthetician
  • ProgramSalon on the first floor, day spa on the second
  • LocationSchaumburg, Illinois

Services

How we can work together

01

Architectural Design

  • Programming & site analysis
  • New construction & adaptive reuse
  • Renovation & historic rehabilitation
  • Master planning
  • Code compliance & ADA coordination
  • Consultant & client coordination
  • Construction documents & bidding
  • Construction administration & closeout
02

Sustainability Consulting

  • LEED documentation & certification
  • Sustainability strategy & systems coordination
  • Biophilic design integration
  • Net-zero & high-performance building consulting

Available as a standalone consulting engagement alongside — or independent of — full architectural services.

03

Design Education & Collaboration

  • Human-Centered Design workshops & training
  • Guest lectures & speaking engagements
  • Community-partnered student design projects
  • Curriculum & design-program consulting

Bringing real clients and live design problems into the classroom — and classroom thinking back into practice.