When the Code Is the Case, Credentials Matter.

When the Code Is the Case, Credentials Matter.When the Code Is the Case, Credentials Matter.When the Code Is the Case, Credentials Matter.

When the Code Is the Case, Credentials Matter.

When the Code Is the Case, Credentials Matter.When the Code Is the Case, Credentials Matter.When the Code Is the Case, Credentials Matter.
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Expert Witness & Litigation Consulting

Expert Witness & Litigation ConsultingExpert Witness & Litigation ConsultingExpert Witness & Litigation Consulting

A S Klein Engineering PLLC is ready to discuss whether your case has a building code dimension.

Contact us now

The Expert Who Helped Write the Rules You're Arguing About

Our Background

Building code litigation turns on a precise question: what did the applicable code require, and was it met? The answer demands more than a practitioner who has used the codes — it demands someone who has shaped them. Andrew Klein, P.E., has served on the committees that draft the International Energy Conservation Code, the A117.1 Accessibility Standard, and NFPA 30A and 101/5000. His opinions carry the weight of someone who understands not just what the code says, but why.


  • Fire & life safety code violations (IBC, IFC, NFPA)
  • ADA / accessibility compliance (A117.1, ADAAG)
  • Commercial building construction defects
  • Municipal permitting & code enforcement disputes
  • High-hazard occupancies & special use facilities
  • Energy code compliance (IECC Commercial)

A Credential Set That Holds Up Under Cross-Examination

Dual Engineering Licensure

Dual Engineering Licensure

Dual Engineering Licensure

Licensed as both a Professional Fire Protection Engineer and a Professional Chemical Engineer. This rare combination is directly relevant to complex commercial and industrial cases involving hazardous materials, occupancy classifications, and fire suppression system design.

Code Committee Insider

Dual Engineering Licensure

Dual Engineering Licensure

Active member of the ICC code development committees for the IECC Commercial Code and the A117.1 Accessibility Standard, as well as NFPA Technical Committees for NFPA 30A and NFPA 101/5000. Opinions grounded in the intent of the drafters, not just the text.

Seven ICC Certifications

Dual Engineering Licensure

Seven ICC Certifications

Certified Fire Plans Examiner, Certified Building Plans Examiner, Certified Commercial Building Inspector, and four energy code certifications. Breadth of certification means a single expert can credibly address overlapping code issues across disciplines

Regulatory Leadership

Available to Both Sides

Seven ICC Certifications

Served as Chairman of the Washington State Building Code Council, overseeing the Building, Fire & Plumbing Codes Committee. Understands the regulatory process from both the technical and administrative perspectives.

Available to Both Sides

Available to Both Sides

Available to Both Sides

Retained by both plaintiff and defense counsel. Opinions are grounded in the technical record — not in advocacy. Opposing counsel will find the same rigorous analysis regardless of which side retained the expert.

National Availability

Available to Both Sides

Available to Both Sides

Based in the Pacific Northwest and available for engagements in all 50 states. Licensed in Washington, Oregon, New Mexico and Idaho, with experience on federally regulated projects and familiarity with both model codes and state-adopted amendments.

Full-Spectrum Litigation Support

Case Evaluation & Screening

Expert Reports & Written Opinions

Expert Reports & Written Opinions

Preliminary technical review to assess the strength of code-related claims before significant resources are committed.

Expert Reports & Written Opinions

Expert Reports & Written Opinions

Expert Reports & Written Opinions

Detailed, citation-supported reports prepared to Rule 26 standards, covering applicable codes, findings, and conclusions.

Deposition Testimony

Expert Reports & Written Opinions

Deposition Testimony

Clear, technically accurate deposition testimony that holds up under rigorous cross-examination.

Trial Testimony

Non-Testifying Consulting

Deposition Testimony

Courtroom testimony presented to judges and juries in accessible, authoritative terms without sacrificing technical precision.

Non-Testifying Consulting

Non-Testifying Consulting

Non-Testifying Consulting

Confidential technical consulting to help counsel understand the code landscape, evaluate opposing experts, and develop strategy.

Let's Get Started

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