Award-winning architect in NYC specializing in residential, commercial, and interior design projects. Serving New York with timeless, client-focused solutions.
WELCOME TO
William Leggio Architect LLC
Rooted in NYC
We design spaces that honor New York’s past and embrace its future—blending classic details
with modern function.
Integrated Design
Architecture and interiors work together for cohesive, elegant spaces tailored to how you
live and work.
Citywide Expertise
From zoning to landmarks, we navigate NYC’s complexities to deliver smooth, efficient
project execution.
Crafting Elegant, Functional Spaces in NYC
William Leggio Architect LLC is a New York-based architectural firm delivering thoughtful, high-impact designs across residential, commercial, and interior design projects. With a foundation in classic principles and a vision toward modern living, the firm creates tailored spaces that reflect both form and function. From pre-war townhouses to contemporary commercial spaces, each project is a testament to detail, creativity, and precision.
Whether designing from the ground up or enhancing existing structures, William Leggio brings decades of experience to every architectural and interior concept—balancing historical awareness with innovative design practices.
Architecture, Interior Design, and Planning Services
At William Leggio Architect LLC, every service begins with careful listening and a deep understanding of the client’s goals. The studio offers full-service architecture and interior design for projects of every scale.
Residential Architecture
Specializing in single-family homes, brownstones, and apartments, residential designs fuse comfort, flow, and timeless aesthetics.
Commercial Architecture
From retail to mixed-use developments, commercial spaces are tailored to support functionality, tenant experience, and long-term flexibility.
Interior Design
A holistic design process ensures that interior spaces harmonize with architectural intent—delivering seamless beauty, material integrity, and efficient use of space.
Project Planning and Historic Restoration
Site analysis, zoning compliance, and landmark coordination are just a few of the planning services offered, ensuring a smooth development process. The firm also specializes in historic preservation, giving new life to iconic structures while respecting their original character.
What Sets William Leggio Architect LLC Apart
With a keen understanding of New York City's unique regulatory environment and design landscape, the firm brings efficiency, creativity, and clarity to the entire architectural process.
Client-Focused Process
Every design starts with your vision and evolves through close collaboration and transparency.
Contextual Awareness
Projects respond to the rich architectural diversity of New York, preserving character while enhancing modern livability.
Attention to Craft
From facade detailing to interior proportions, precision and quality are embedded into every phase of design.
Featured Projects in New York City
Over the years, William Leggio Architect LLC has completed a broad range of architectural and design projects throughout Manhattan and the surrounding boroughs. While specific case studies are showcased on the Portfolio pages, notable projects include:
- Full brownstone renovations in Brooklyn
- Landmark-compliant restorations in Manhattan
- Boutique retail and office interiors in SoHo
- Custom-designed single-family homes in Queens and Staten Island
Each reflects the firm’s commitment to thoughtful, enduring design.
FAQs About Our Architecture Services in NYC
Do you work on both residential and commercial architecture?
Yes. The firm is experienced in designing single-family homes, apartments, retail spaces, and mixed-use buildings throughout NYC.
Are you familiar with local zoning and landmark requirements?
Absolutely. William Leggio Architect LLC frequently works with DOB and LPC compliance to streamline approvals and keep projects on track.
Can you handle interior design as well as architecture?
Yes. Interior design is offered as a fully integrated service for both residential and commercial projects.
Do you work on renovations as well as new construction?
Yes. The firm handles gut renovations, restorations, adaptive reuse, and new builds.
What areas of New York do you serve?
We work throughout New York City, including Manhattan, Brooklyn, Queens, the Bronx, and Staten Island.
Contact Us to Start Your Architectural Project
If you're looking for an experienced architect in New York City who prioritizes both vision and execution, William Leggio Architect LLC is ready to collaborate. Whether you're developing a new residence, restoring a historic property, or launching a commercial space, our team provides the guidance and creativity needed to bring your project to life.
