Inspections required if I fix it my self

[Pam Poe]

I am rehabbing a house I bought, it needs everything and I've gutted to studs and am now rebuilding. I am a 55 year old widow women not a contractor. I like fixing and painting. So if I do all the work inside do I need to pull permits? For plumbing, electrical etc? I replaced the septic and drain field with no permit and no one complained but I don't know if I got lucky or better to be safe. It's my 1st project. Thanks