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At McMillen Engineering, each building project begins with a project analysis, needs assessment and development of a thorough project schedule.


Our team works through the preliminary design approval process to final design and completed construction details, which include floor plan, elevation, standard details, wall sections, schedules, structural design plans, and mechanical, electrical, and plumbing plans.

Services include:


  • Building Permit Plans (including building permit application)

  • Structural Design

  • Building Inspections

Code Details


McMillen Engineering, Inc. serves as a Certified Third Party Agency with the Pennsylvania Department of Labor and Industry to provide Uniform Construction Code (UCC) services to local governments for the issuance of building permits, to review plans, and to complete required inspections.


We are certified to perform code work for opt-in and opt-out municipalities in Allegheny, Fayette, Greene, Somerset, Washington, and Westmoreland counties.

Our team's extensive certifications and expertise in building code enforcement means that you can have confidence that your project will meet all necessary building code requirements. Our professionals hold certifications as Building Code Officials, Certified Inspectors, and Certified Plan Reviewers. These certifications demonstrate our commitment to ensuring that all construction projects comply with the necessary building codes and regulations.


The engineering team at McMillen Engineering provides structural design services for a wide range of projects.

We work closely with architects, contractors, and developers to ensure that the structural design of buildings meet all necessary safety and regulatory requirements. Our goal is to create structurally sound and efficient designs that optimize space utilization and withstand environmental forces.

Our structural design services include:

  • Preliminary design and analysis

  • Detailed structural calculations and drawings

  • Selection of appropriate building materials

  • Collaboration with architects and other design professionals

  • Compliance with local building codes and regulations

  • Construction administration and support

Whether you are planning a residential, commercial, or industrial project, the McMillen Engineering team has the expertise to provide innovative and cost-effective structural solutions. We use the latest industry tools and technologies to analyze and model structural elements, ensuring the accuracy and reliability of our designs.

Building Projects


Learn more about our services, email us at, or give us a call at 724.439.8110 to discuss your building project needs.

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