Codes are revised frequently to accommodate new technology and changes in use. There are separate codes for building, electrical, plumbing, heating, and other aspects of construction. They are published by different agencies on various schedules. Local jurisdictions such as cities must adopt a code for it to have the force of law, and they often add local amendments. A "code inspection" would entail research to determine which version of each code was in effect when the house was built or remodeled. Legal research is beyond the scope of my usual inspection, but is available at additional cost if needed.

This does not mean that I ignore codes in performing inspections. I often refer to code standards to put findings in perspective. For example, I would point out that a stairway does not meet modern standards because the standards are intended to reduce falls on stairs. This does not mean that the stairs did not comply with the code in effect at the time they were built. Also, I would mention that a recent addition does not appear to comply with modern standards, because this suggests poor workmanship and raises the possibility that the work was done without a permit. Further investigation at the local building department would be needed to establish whether the work was approved.