Architecture

Purposeful Architecture Rooted in Context

William Leggio Architect LLC offers full-service architectural design in NYC with a commitment to clarity, context, and construction-ready solutions. With decades of experience in urban settings—from landmark brownstones to adaptive reuse developments—every project is guided by the belief that good architecture is both functional and timeless.



The firm approaches each project with precision and purpose. Whether working on new construction, a historic restoration, or a full renovation, the goal remains constant: to enhance how people live and interact with space while navigating the city’s regulatory landscape effectively.

Our Approach to Architectural Design

Architecture in New York requires more than creativity—it demands technical fluency, contextual awareness, and coordination across complex project conditions. William Leggio Architect LLC leads every project from site analysis through permitting and final inspections.

Phased Architectural Services Include:

  • Schematic Design: Site studies, massing, spatial concepts
  • Design Development: Material selections, facade studies, floor plan refinement
  • Construction Documentation: DOB-compliant drawing sets, consultant coordination
  • Permitting & Filing: Zoning and code review, LPC filings, DOB application preparation
  • Construction Administration: Site visits, submittal review, contractor coordination

The studio emphasizes consistency between concept and execution, reducing surprises during construction and helping projects stay on schedule and within budget.

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.

Residential Architecture

Designing for New York’s dense and diverse housing stock requires an understanding of space optimization and code compliance. The firm has designed:



  • Single-family townhouses
  • Multi-unit residential buildings
  • Apartment reconfigurations and combinations
  • Vertical expansions and rooftop additions

Commercial Architecture

From SoHo storefronts to Midtown offices, the firm creates commercial spaces that reflect brand identity while supporting operational flow.


Commercial experience includes:

  • Boutique retail build-outs
  • Office interior fit-outs
  • Mixed-use structures
  • Lobby renovations and ADA compliance upgrades

Adaptive Reuse & Historic Properties

Projects involving pre-war and landmark buildings require a high level of technical and historical understanding. The firm provides expertise in:



  • LPC coordination and approvals
  • Façade restoration
  • Interior modifications to protected structures
  • Adaptive reuse of underutilized buildings

Purposeful Architecture Rooted in Context

  • Hands-on principal involvement

    William Leggio personally leads each design phase, providing continuity and accountability.

  • Regulatory fluency

    Deep experience with NYC DOB and LPC processes streamlines project approvals.

  • Contextual design sensibility

    Each design is tailored to the site, neighborhood, and client vision.

  • Detailed project management

    Clients are guided step-by-step through planning, design, and construction coordination.

The result is a body of work that not only meets functional needs but also contributes to the city’s architectural fabric in a meaningful way.

FAQs About Our Architectural Services

  • Do you handle all filing and permitting requirements?

    Yes. The firm manages all filings, including DOB, LPC, and zoning compliance documentation.

  • What is your typical project size?

    We work on a range of projects—from townhouse renovations to multi-unit buildings and retail interiors.

  • Can you help with site feasibility or pre-purchase consultations?

    Absolutely. Early feasibility analysis helps clients understand zoning constraints, structural considerations, and renovation potential.

  • Do you offer interior design along with architectural services?

    Yes. Interior design is integrated for clients who prefer a cohesive approach across both architecture and interiors.

  • How long does the design process typically take?

    Timelines vary by scope but generally range from 3–6 months for design and filings, with additional time for construction.