Portfolio

Built Work That Reflects Purpose and Place

William Leggio Architect LLC’s portfolio showcases a body of work designed specifically for New York City’s urban context. The firm’s completed projects span brownstone restorations, new single-family residences, adaptive reuse developments, boutique retail spaces, and refined interiors.



Each project reflects a balance of aesthetic vision, technical execution, and sensitivity to its environment. Whether navigating historic landmark requirements, working within tight infill sites, or coordinating complex tenant fit-outs, William Leggio leads each design with clarity and intent.


The work featured in this portfolio reflects not only architectural expertise, but deep attention to how people live and work in real urban environments.

Types of Architecture Projects We Design

William Leggio Architect LLC has worked across a range of project types in the five boroughs, each shaped by distinct needs and neighborhood character.

Upper West Side Townhouse Renovation

Full-gut renovation including rear yard extension, new stair core, and interior design integration.

Carroll Gardens Single-Family Home

Ground-up custom residence designed for natural light, vertical flow, and energy efficiency.

Tribeca Loft Apartment

Reconfiguration of historic commercial space into an open-plan luxury residence with custom millwork.

Staten Island Infill Home

Compact urban lot transformed into a two-story residence with green roof and garden-level access.

These homes demonstrate the firm’s ability to manage diverse programs, zoning restrictions, and client needs while maintaining architectural coherence.

Commercial Architecture Portfolio

William Leggio Architect LLC’s commercial projects include retail, office, and mixed-use developments throughout New York City. These spaces are designed for flexibility, code compliance, and long-term performance.

SoHo Boutique Fit-Out

Complete storefront redesign, interior lighting plan, and brand-specific material palette.

Chelsea Creative Studio Office

Custom workstations, acoustic partitions, and gallery walls for a media company headquarters.

Brooklyn Mixed-Use Conversion

Adaptive reuse of a commercial shell into retail on the ground floor with two residential units above.

Flatiron Lobby Redesign

Upgraded public lobby with lighting, security integration, and ADA-compliant access improvements.

These projects balance identity with functionality—supporting user experience and building operations.

Interior Design Portfolio

Interior design work by the firm is fully integrated with architectural planning to ensure cohesion and efficiency. Each space is designed with material consistency, thoughtful lighting, and spatial clarity.

Park Slope Kitchen & Living Room

Custom millwork, stone finishes, and architectural lighting for a growing family.

UES Duplex Apartment

Space-saving storage solutions, built-ins, and neutral palettes designed for longevity.

Downtown Law Office Interior

Glass partitions, wood panels, and reception redesign tailored to a professional environment.

Brooklyn Townhouse Bedroom Suite

Reconfigured floor plan with private bath, wardrobe wall, and terrace access.

Interior work by William Leggio focuses on both beauty and livability, using materiality to support clarity and calm.

How to View Our Work

The project examples listed here represent a selection of completed work. To view full case studies, including floor plans, before-and-after images, and client objectives, please visit each Portfolio subpage:



  • Residential Projects
  • Commercial Projects
  • Single-Family & Townhouses
  • Interior Design


Each subpage offers more detailed insight into scope, challenges, and design strategies behind the finished projects.

FAQs About Our Portfolio

  • Are these real completed projects?

    Yes. All projects shown are real and were designed and managed by William Leggio Architect LLC.

  • Do you provide photos and floor plans?

    Where available, we include photography and layout drawings on detailed subpages.

  • Can I visit completed homes or buildings?

    We do not conduct site visits to private residences but can provide references and detailed documentation.

  • How current are the projects in the portfolio?

    Our portfolio includes work completed over the past 10–15 years, with recent additions included.

  • Are all projects located in New York City?

    Yes. All listed projects are within NYC’s five boroughs.