Furthermore the local experts can confirm the following: (1) the use is allowed, (2) the use requirements can be protected by permitting and licensing and (3) the permissions are transferable through a sale.

The City of San Jose has on their website that new addresses are required but separate meters are optional (link below).https://snapadu.com/blog/electric-panels-upgrades-power-sources-adu/https://cao-94612.s3.amazonaws.com/documents/City-of-Oakland.PGE-Joint-Information-Bulletin-METERS-FINAL.pdfhttps://www.sanjoseca.gov/business/development-services-permit-center/accessory-dwelling-units-adus/adu-faqs

We are ready finalize the plans & start permitting. 

Does the price, rehab, and ARV meet your percentage requirements after holding costs, closing costs, commissions, hard money fees, permits, & other soft costs?

In some markets the permit process to convert/create addition living areas for income is rather expensive.

So on the low end a $1.5M lot plus a 3,000 sq ft home x $300= $2.4M not including furniture and with permitting to build completetion running most builders 12 to 15 months. 

Sure you had a city permit for everything along with inspections and rules to follow but so long as you did you could make a ton of money.  

Next time on a MAJOR renovation project, I'd have the City of Johnson City Building Inspector join me for a pre-purchase tour to tell me what permits and what jobs they'll require of me.

If you need a permit for it, some things can be permitted retroactively.

I believe that would include permitting USPS to forward the letter.As already stated, if you can't reach them with your letter, then you won't be able to serve them a summons for a court hearing.Chalk it up as a loss and move on.