Dennis Flaherty is the owner of Inside N Out Inspection Services in Bellingham. His inspection related backround includes twelve years as a licensed home inspector, a past licensed general contractor and experience in the construction industry as a carpenter, electrician, and a home remodeling specialist. Educational experience includes a Bachelors Degree in Environmental Science, a graduate of Carson Dunlop Weldon Commercial Inspection Training and Inspector Training Associates (ITA) Home Inspection School. Dennis is also a bonded and insured.


  • Washington State Licensed Home Inspector #218
  • Washington State Licensed Structural Pest Inspector #70563
  • American Society of Home Inspectors Certified Member #244796
  • Certified Building Performance Institute (BPI) Building Analyst Professional #5037029
  • Previously certified Residential Energy Services Network (RESNET) Auditor
  • Certified Level 1 Professional Thermographer


  • Humboldt State University – Bachelor of Science Degree in Environmental Science
  • Carson Dunlop Weldon – Commercial Inspection Training
  • Inspector Training Associates (ITA) – Residential Inspections Course
  • Professional Thermographers Association – Thermographer Course
  • Building Science Corporation – Building Science Fundementals
  • RESNET –  Home Energy National Rater Training
  • ASHI Conference – International Residential Code Course


  • Member of American Society of Home Inspectors (ASHI)
  • Previous member of Building Performance Institute (BPI)
  • Member of International Code Council (ICC)
  • Member of Professional Thermographer Association