Unless the medical condition meets the state criteria for early termination and that the medical notice does not appear to suggest that, you cannot terminate the lease outright/immediately but that you will begin to market the property for rental and upon securing an acceptable tenant, the lease can be terminated pending a satisfactory property walkthrough indicating no damages. 

I bought this property with a private interest free loan from a friend. the person i bought it from need cash fast so i offered them a low cash offer and they accepted.I had enough money saved up to rehab the house with my savings.

Most mortgage companies will not call loan due if payments are current but you do run that risk and need to be prepared to payoff or refi at a moments notice.

.  --- From the zoning code it says, an RM-2 zoned lot can have "1 unit per 2,500 sf. of lot area"If you don't meet that lot size requirement you'll need to make a request for a variance, then post notice about the desired change in front of the building.

@Robert EllisAre you leveraging construction-to-permanent loans or private funding?

pretty small hurdle to have a good win as a private lender just get paid as agreed.now equity participation loans those can spin the needle pretty well ..

. - Who ever told you that only 30 days notice is required does not know CA law.  

Investment Info:Single-family residence private money loan investment.

I have a private investor who will lend his own capital for ADU financing.

An example might be a commercial tenant with 50% of the space in a building sends an after-letter notice that it now plans to vacate at the end of its lease term in 6 months.