If Some One Puts A Lien On Your House ( In New York State ) Can That Person Get Control , Own Your House From Under You? And How Long Does The Lien Stay On The House, Just Till You Go To Sell Or For Ever Thank You Please Help...

1. Depends on what type of lien, property tax, IRS, city assessment, from a judgement of personal debt

Normally a lien added though a judgement for a person loan is only on the property, it stays on the property till it is paid off. If the property is ever sold it will have to be paid to sell it, of if the person who owns it, dies, the house would have to be sold in probate to pay the liens.

Also the lien will stop you from getting a new first or second mortgage on the property normally

No they cannot gain control. A lien is an encumbrance against a property that says, the property can't be transferred until the lien is satisfied. Siunce you can't sell unless its satsified it stays there until you sell.