Building History since 1909

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 100,000,000 Sq. Feet of Completed Construction Projects

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.

Thank you to our dedicated team at @IrwinLeightonCM for all their work! Despite COVID19, progress continues at the @parkerlifeorg Somerset project. Structural steel & roof work done with interior framing & rough in well underway. #healthcareconstruction #110yearsandcounting

Thank you to all of the healthcare workers that are doing so much to keep us healthy. Most especially the Nurses among you this week! #nationalnursesweek2020 #healthcareworkers #flatteningthecurve

We hope all of our members take advantage of #CREWPhilly’s benefits, so please be sure to keep your contact information on CREWbiz up to date, especially your email address so you continue to receive our weekly eblasts. Visit

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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.