This would also make a big difference when calculating your net gain. 

Fair return is calculated to determine if the owneris maintaining the net operating income produced by theproperty in a base year, subject to CPI-related adjustments.https://www.readkong.com/page/guide-to-oakland-rental-housin...2021 - GUIDE TO OAKLAND RENTALHOUSING LAW

You will also get helpful advice on calculating the potential return on investment (ROI).

The one we used said they ran his outstanding debt @Cindy Joseph we look at their debt and outstanding collections but don't calculate a debt-to-income ratio the way lenders do.

By the time that's done, you'll know enough to start investing in distant lands.Education is important, but you will never have all the answers, perfect formulas, or whatever it is you think you need. 30 years ago, people made money in real estate without any ROI calculations, hard money lenders, BP forums, podcasts, coaching courses, etc.

That said, the assessor probably has at least a diagram of the home that they used to calculate the square footage and that would tell you the footprint of the house they have in their records. 

- Are there any differences in how depreciation is calculated for foreign properties vs.

(I asked ChatGPT to calculate this, and you are better off to invest that extra money rather than payoff your mortgage depending on your mortgage rate.

Like Christopher said in his post,  that is when you understand that investing is arisk calculated transaction.   

The teacher did try and have us study balancing a check book and calculate interest rates but the class was meant for kids who couldn't pass normal high school math.