Be sure to address differing site conditions in a construction contract and avoid higher prices and failed construction projects.
Almost every construction and renovation project carries with it the risk of differing site conditions. Differing site conditions are one of the true unknowns. The discovery of differing site conditions can lead to costly overruns, delays, claims, and litigation or arbitration. Failing to address differing site conditions in a construction contract can lead to higher prices, increased estimating costs, insolvency, and failed construction projects. This topic will provide owners, developers, contractors, subcontractors, architects, engineers, public agencies, contracting officers, administrators, attorneys, and others who have an interest in construction contracting and claims with the knowledge necessary to navigate the risk of differing site conditions through their contracts and during the construction process. This material will also help such persons to identify different ways in which they can recover or defend against claims for differing site conditions. This information is critical to those who contract for, manage, supervise, or administer construction services that may be affected by unknown physical conditions.
Learning Objectives
- You will be able to recognize contract limitations to recovery for differing site conditions.
- You will be able to identify different types of differing site conditions.
- You will be able to explain the legal issues relating to differing site conditions.
- You will be able to define what constitutes a differing site condition.
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Agenda
Overview
- What Is a Differing Site Condition?
- Historic Treatment of Differing Site Conditions
- Sanctity of Contract
Contract Provisions
- Type I Differing Site Condition Clause
- Type II Differing Site Condition Clause
- Other Types of Differing Site Conditions
- Hazardous Materials
- Archeological Artifacts
- Implied Contract Obligations
- Good Faith and Fair Dealing
- Information
- Implied Warranty of Adequacy of Design
- Inquiry
Limitations on Contract Provisions
- Inspection
- Notice
- Avoidance Clauses
Common Law Claims for Differing Site Conditions
- Concealment
- Misrepresentation
Equitable Defenses
- Mutual Mistake
- Impossibility
- Commercial Impracticability
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Over 36 years and 1.4 million customers worth of experience providing continuing education. Our passion is providing you world-class training to help you succeed in business and as a professional.
Credits
OnDemand Course
This course was last revised on June 24, 2021.
Call 1-866-352-9540 for further credit information.
- AIA 1.5
- Lorman Education Services is a registered provider of AIA-approved continuing education under Provider Number J2016. This course is approved for 1.5 Learning Unit hour(s). Prerequisite: None, Program Level: Intermediate: Advanced Preparation: None
All registered AIA CES Providers must comply with the AIA Standards for Continuing Education Programs. Any questions or concerns about this provider or this learning program may be sent to AIA CES ([email protected] or (800) AIA 3837, Option 3). This learning program is registered with AIA CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. AIA continuing education credit has been reviewed and approved by AIA CES. Learners must complete the entire learning program to receive continuing education credit. AIA continuing education Learning Units earned upon completion of this course will be reported to AIA CES for AIA members. Certificates of Completion for both AIA members and non-AIA members are available upon request.
- AR CLE 1.5
- This course has been approved for 1.5 hours of CLE by the Arkansas CLE Board.
- CA MCLE 1.5
- Lorman Business Center, LLC. is a State Bar of California approved MCLE sponsor and this course qualifies for 1.5 CLE hours of participatory credit.
- WA CLE 1.5
- This program has been approved by the Washington State Board of Continuing Legal Education for 1.5 hours of A/V credit under the Law & Legal Procedure category.
- AK ENG 1.5
- This Ondemand program is applicable for professional development hours through the Alaska State Board of Registration for Architects, Engineers and Land Surveyors. Professional development hours: 1.5.
*Please check the rules and requirements in your state for compliance.
- AL ENG
- This Ondemand program is applicable for professional development hours through the Alabama Board of Licensure for Professional Engineers and Professional Land Surveyors.*
*Please check the rules and requirements in your state for compliance.
- AR ENG
- This Ondemand program is applicable for 1.6 professional development hours.*
*Please check the rules and requirements in your state for compliance.
- FL ENG 1.9
- This course has been approved for 1.9 PDHs by the Florida Board of Professional Engineers in the Areas of Practice.
- GA ENG
- This Ondemand program is applicable through the Georgia State Board of Registration for Professional Engineers.for 1.6 professional development hours.*
*Please check the rules and requirements in your state for compliance.
- IA ENG
- This Ondemand program is applicable for professional development hours for engineers. Please refer to Chapter 3, 193C IAC.*
- ID ENG 1.5
- This Ondemand program is applicable for 1.5 professional development hours through the Idaho Board of Professional Engineers and Professional Land Surveyors.*
*Please check the rules and requirements in your state for compliance.
- IL ENG 1.5
- This program is applicable for 1.5 professional development hours through the Illinois Society for Professional Engineers.*
*Please check the rules and regulations in your state for compliance.
- IN ENG 1.9
- This Ondemand program is applicable for 1.9 professional development hours through the Indiana State Board for Professional Engineers.*
*Please check the rules and requirements in your state for compliance.
- KS ENG 1.0
- This program is applicable for 1.0 professional development hours for engineers.*
*Please check the rules and regulations in your state for compliance.
- KY ENG 1.6
- This Ondemand program is applicable for 1.6 professional development hours for engineers.*
*Please check the rules and requirements in your state for compliance.
- LA ENG
- The Louisiana Professional Engineering and Land Surveying Board (LAPELS) no longer approves providers or courses. Lorman Business Center, LLC. feels that this course is worth 1.5 PDH(s). According to LAPELS' rules, It will be the responsibility of the licensee to determine if a Course/Activity offered by an unapproved sponsor/provider is an Acceptable Activity.
- MD ENG 1.5
- Lorman Business Center, LLC. is a board approved sponsor with the Maryland Board of Professional Engineers. This course qualifies for 1.5 professional development hours.
- ME ENG 1.5
- This ondemand program is applicable for a maximum of 1.5 hours toward the annual PDH requirement. Please note: The State of Maine Professional Engineers Registration Board does not pre-approve courses for professional development credit.*
*Please check the rules and requirements in your state for compliance.
- MN ENG 1.0
- This course is applicable for a maximum of 1.0 hours toward the PDH requirement for engineers. Please note: The Minnesota State Board of Registration for Engineers has final authority on the acceptance of individual courses.
- MO ENG 2.0
- This ondemand course is applicable for 2.0 professional development hours for engineers.*
*Please check the rules and requirements in your state for compliance.
- MS ENG
- This ondemand course is applicable for professional development hours through the Mississippi State Board of Registration for Professional Engineers.*
*Please check the rules and requirements in your state for compliance.
- MT ENG 1.5
- This ondemand course is applicable for 1.5 professional development hours for engineers.*
*Please check the rules and requirements in your state for compliance.
- NC ENG 1.5
- Lorman Business Center, Inc. is an approved sponsor of the North Carolina State Board of Examiners for Engineers and Surveyors. This course qualifies for 1.5 professional development hours for engineers.
- ND ENG 1.5
- Lorman Education Services is an approved provider through the North Dakota State Board of Registration for Engineers and Land Surveyors. This seminar qualifies for 1.5 of continuing professional competence for engineers.
- NE ENG
- This course is applicable for professional development hours for engineers if the course is continuing engineering education for you..*
*Please check the rules and requirements in your state for compliance.
- NH ENG 1.5
- This course is applicable for 1.5 professional development hours for engineers.*
*Please check the rules and requirements in your state for compliance. The New Hampshire Board of Engineers has final authority on granting approval.
- NJ ENG 1.0
- Lorman Business Center, LLC. is authorized as a provider to offer courses through the New Jersey Board of Professional Engineers.
This course is applicable for 1.0 CPC credits for engineers. *
*Please check the NJ State rules and requirements for compliance.
- NM ENG 1.5
- This course is applicable for 1.5 professional development hours for engineers.*
*Please check the rules and requirements in your state for compliance.
- NV ENG 1.5
- This course is applicable for 1.5 professional development hours through the Nevada State Board of Engineering and Land Surveyors.*
*Please check the rules and requirements in your state for compliance.
- OH ENG
- This ondemand course is applicable for continuing education credit for engineers through the Ohio State Board of Licensure for Professional Engineers provided it is a relevant managerial, ethical or technical topic relevant to the practice of engineering or surveying.*
*Please check the rules and requirements in your state for compliance
- OK ENG
- This course is applicable for professional development hours for engineers.*
*Please check the rules and requirements in your state for compliance.
- OR ENG
- This course is applicable toward engineering continuing education hours in Oregon, please refer to your rules and laws.
- PA ENG 1.9
- This program is applicable for 1.9 PDHs for engineers through the Pennsylvania State Board of Professional Engineers, Land Surveyors and Geologists.*
*Please check the rules and requirements in your state for compliance.
- SC ENG 1.5
- This course is applicable for 1.5 hours toward the PDH requirement for engineers through the South Carolina Board of Registration for Professional Engineers.*
*Please check the rules and requirements in your state for compliance.
- SD ENG
- This course is applicable for professional development hours for engineers in South Dakota.*
*Please check the rules and requirements in your state for compliance.
- TN ENG
- This course is applicable for professional development hours for engineers.*
*Please check the rules and requirements in your state for compliance.
- TX ENG
- This Ondemand course is applicable for professional development hours for engineers.*
*Please check the rules and requirements in your state for compliance.
- UT ENG
- This course is applicable for professional development hours for engineers.*
*Please check the rules and requirements in your state for compliance.
- VA ENG 1.5
- This program is applicable for 1.5 hours of continuing education through the Board for Architects, Professional Engineers, Land Surveyors, Certified Interior Designers and Landscape Architects (APELSCIDLA BOARD).*
*Please check the rules and requirements in your state for compliance.
- VT ENG
- This course is applicable for professional development hours for engineers.*
*Please check the rules and requirements in your state for compliance.
- WI ENG 1.5
- This course is applicable for a maximum of 1.5 hours toward the PDH requirement for engineers.*
*The Wisconsin Engineer Section has final authority on the acceptance of individual courses and providers.
- WV ENG 1.5
- This course is applicable for 1.5 professional development hours for engineers.*
*Please check the rules and requirements in your state for compliance.
- WY ENG 1.9
- This course is applicable for 1.9 professional development hours for Wyoming engineers.*
*Please check the rules and requirements in your state for compliance.
- ICC 0.15
- Lorman Education Services is an International Code Council Preferred Provider. This event is approved for 0.15 CEU's through ICC.
To earn each credit Lorman offers through the OnDemand learning platform, you need to watch 100% of the program. Also, for certain credits you will need to fulfill additional requirements which will be displayed on the "credits" tab when viewing the course.
- Those applying for AIA and HRCI must view 100% of the program and answer the questions following the program.
This program does NOT qualify, nor meet the National Standard for NASBA accreditation.
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Why Lorman?
Over 36 years and 1.4 million customers worth of experience providing continuing education. Our passion is providing you world-class training to help you succeed in business and as a professional.
Faculty

Scott D. Cahalan
Smith, Gambrell & Russell, LLP
Scott Cahalan
- Partner in the construction law and litigation section of Smith, Gambrell and Russell, LLP, an AmLaw 200 firm
- Part-time instructor of graduate courses in Design and Construction Law and Real Estate Development Law at the Georgia Institute of Technology
- General counsel to the Georgia Utility Contractor’s Association
- Practice includes all aspects of design and construction law from drafting and negotiating prime contractors, subcontracts, and purchase orders to mediating, arbitrating, and litigating construction disputes
- Drafted form construction contracts for the Associated Owners and Developers, a national organization
- Recognized by Chambers USA, The Best Lawyers in America, and Georgia Super Lawyers
- Frequent author and lecturer on construction law
- Member of the State Bar of Georgia, Northern District of Georgia, and 11th Circuit Court of Appeals
- J.D. degree, with honors, University of Georgia; B.S. degree in construction engineering, Iowa State University
- Contact information [email protected], [email protected], or (404) 815-3711
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Why Lorman?
Over 36 years and 1.4 million customers worth of experience providing continuing education. Our passion is providing you world-class training to help you succeed in business and as a professional.

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