/diy/ - Do It Yourself

Listen OP, I see a lot of people saying screw permitting and UCC on this but as a construction professional I'll pass this on:

the only thing inspectors hate more than having to actually inspect something is you not paying for your permit.

Go get a permit for an Enclosed Porch and tell them that all you're doing is closing off an existing structure with an existing roof. That way you probably won't need to submit plans and you won't need a Certificate of Occupancy. If you get caught building or residing in this addition without permitting they will not only make you tear it out but likely fine you retroactively for as long as you have been living in it. The measly ~$100 permit will be nothing compared to the cost of getting busted.

If they require you to conform to a construction schedule with staged visits you can probably get away with emailing photos. Which means you can take photos whenever you want, like before you wire the place up but after you install drywall so you don't have to pass electrical.

Also, use that box beam as a header for the outside wall and construct a 2x6 wall under it and run a 2x6 wall back to the house. if you don't make your walls 2x6 it's going to be a bitch to find an exterior pre-hung door for a 2x4 wall and you're likely only gong to save a couple bucks on lumber.