What are the permitting considerations to add more bedrooms and change the use of garage?

Is that even a significant cost in the long run that we should take into consideration?

Higher Fees and Costs: Cross collateral loans may come with additional fees, such as appraisal costs for each property involved, which can increase the overall cost of borrowing.In conclusion, while cross collateral loans can provide valuable opportunities for accessing larger amounts of financing and potential cost savings, they also come with considerable risks and complexities that borrowers must carefully consider.

As @Lucas Martinez mentioned, FMV rents in Santa Barbara have exploded, I'm trying to be considerate of my tenants while also exploring a path to adding value to the investment--which I know probably falls into the oxymoron category.

Never could get all the details of the lease though, so didn't go thru.A couple of considerations:1. 

I have a considerable amount of equity in the house (HCOL area), and after the renovations are complete we are looking to sell the house in order to use the proceeds to kick start the next venture (flipping).  

Another consideration, @Jay Hinrichs, is whether the electrical infrastructure at the property can handle it. 

Are there specific considerations, tips, or challenges I should be aware of in these areas?

However, if one property is overseas, there might be additional considerations to factor in.

The app gives immediate scores on what is a good deal and what may need more consideration to make it a good deal.