We Build HistoryTM

Since its founding in 1909, I&L has provided quality construction services and has established a standard for performance with integrity that is the foundation of the company’s relationships with customers, architects and engineers, subcontractors and employees. A tradition of accomplishment and a spirit of commitment drive the firm’s operations into the future.

Over 1500 Successful Projects Since 1909

Over 22,000 Beds on College Campuses

Our Sector Knowledge

Select Experience

The projects shown are a select few showing Irwin & Leighton's depth of experience and knowledge within the Commercial Construction industry.

Project Experience
New Outpatient Facility, Capital Health System

New Outpatient Facility, Capital Health System

Healthcare & Senior Living, Select Experience

Tenant Fit-Out, Main Event Entertainment

Tenant Fit-Out, Main Event Entertainment

Retail/Hospitality, Select Experience

New Store, Target Corporation

New Store, Target Corporation

Retail/Hospitality, Select Experience

Meet Our Team

As an employee owned, privately held business, we hire the best, brightest and most talented individuals in the business. We pride ourselves on our corporate culture, passion for success and our drive to make every customer our next 50 year customer.

Bringing more value to your vision.
Bold thinking begins where conventional thinking ends.

Latest News

The latest news from Irwin & Leighton including industry trends, the best construction blogs and publications and updates on our latest project news.

    LinkedIn Company Updates

  • 8 Days Agoview on linkedin

    Irwin & Leighton, Inc.

    Irwin & Leighton's first project for McGraw Hill began a long and positive relationship. The office and warehouse along Princeton-Hightstown Road were the predecessors of an entire campus in East Windsor. A majority of the new buildings at the complex since 1961 were built by Irwin & Leighton. McGraw-Hill

  • 22 Days Agoview on linkedin

    Irwin & Leighton, Inc.

    Educational institutions continued to see an uptick in attendance during the 1950's. In order to have a central place for their growing student population, the Pennsylvania State University, a 67 year customer, had Irwin & Leighton build the Hetzel Union Building (HUB), named in honor of then President Hetzel. The Nittany Lion Inn opened under the management of the Treadway Corporation in 1931, and became a self-supporting arm of the Pennsylvania State College (now University) in 1948. In 1952, Irwin & Leighton built an addition that added 75 rooms to the Inn. Pennsylvania State University-Penn State Beaver

  • 23 Days Agoview on linkedin

    Irwin & Leighton, Inc.

    IRWIN & LEIGHTON IS ACTIVELY HIRING IN ALL DEPARTMENTS! Please head to our website https://lnkd.in/egTfWg6 for job descriptions. All resumes and cover letters can be directed to info@irwinleighton.com. #hiring #constructionmanagement #constructionmanager

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Work With Us

As a leading builder, Irwin & Leighton partners with the top subcontractors who have a prime focus on safety and performance.