Can my next door neighbor build right next to my building, turning my semi detached house to attached house?

The surveys, building permits and plans, and zoning tegulations need to be reviewed.

Could I have NY Living Will?

That's easy. What about your Will, Health Care Proxy and Power of Attorney? Clients usually do all four tigether.

What do I need to know/do to protect myself in order to go partnership on a mortgage that someone else holds and resides at?

Plenty, and well past what anyone could post here. Best to retain experienced real estate attorney.

IT Software: Pay for Performance Contract instead of NDA

Heavy duty. Retain counsel.....................

What are my rights with photos on a film when contract changed, etc?

Q. I was given verbal permission by a producer on the movie, a personal (now ex) friend, to use them in my portfolio. A. Probably not sufficient. ...

How I can get my security deposit back from landlord who refuses to return it?

You sue, and request legal fees pursuant to the lease agreement.

By statute, some verbal agreements are enforceable and some are not. Please describe the agreement.

Civil Court?

This scenario is extremely common. Is there a written agreement?

Is it possible to force the landlord to fix a loud noise issue due to a structural defect in the external wall of my building?

Yes, I am familiar with noise litigation, especially in the landlord/tenant context.

Sounds like a lawsuit in the making. What amount of money is in dispute?