Heightened diligence and competency in real estate appraisal with multidisciplinary expertise in economics, urban planning and GIS.

Experienced in a broad range of property types, tenancies and markets.

Accountable and responsive.

Primary Services 

 Appraisals and consulting assignments for commercial, industrial, multi-family and special purpose properties in Eastern Pennsylvania. Primary focus is Philadelphia and the Lehigh Valley metro markets.  

We are devoted to investigation and objective analysis of the critical factors impacting the market position, potential and value of real property interests . We produce value-added reports with relevant information that illuminate issues, inform strategy and instill confidence


All assignments are conducted and reports prepared in conformance with the Code of Professional Ethics (CPE) and the Standards of Valuation Practice (SVP) of the Appraisal Institute.  These Standards establish requirements for appraisal and related consulting assignments and include the Uniform Standards of Professional Appraisal Practice (USPAP) as promulgated by the Appraisal Standards Board of The Appraisal Foundation. 

Other standards including theUniform Appraisal Standards for Federal Land Acquisitions (USFLA) and state guidelines in accordance with requirements for Federal Aid Highway programs are applied as required.

GAC is committed to safeguarding client privacy.  Any non-public financial or otherwise privileged information received in the course of an assignment will be treated as priveleged and confidential.

Specialized Practice and Expertise

  • Eminent Domain /Condemnation appraisal and testimony
  • Easements  and partial interests
  • Natural/Mineral Resources
  • Appraisal Review for Litigation
  • Appraisal of unique properties engaged in a special purpose


Gontram Appraisal & Consulting 

1205 E 4th Street
Bethlehem, PA  18015


William Gontram, MAI, R/W-AC
Sole Proprietor