Thanks for response Charles11 Our dad was maried 49 years (same women!)
No problem. 49 years is pretty remarkable.
The reason I asked about a wife was:
When a spouse inherits a deceased spouse's half of the property they do so with a basis that is equal to the market value of the inherited HALF at that point in time.
So if the property was worth 400,000 at the time the wife passed the surviving spouse's basis would be 200,000 for the inherited half PLUS half of the original basis. Eg. if the house cost 30,000 initially his basis would be 200,000 plus the 15,000 = 215,000 so when he then uses his 250,000 exemption there would be no federal income tax due on the sale.
Now having said that, in community property states (like California) the ENTIRE basis can be stepped up to market value (in the example above, increased to the full 400,000) on the date of a spouse passing depending on how the title was held. This should be investigated if the house value is high enough to get a benefit from this.
The money spent on an estate planner/tax adviser now is worth every penny. It is a lot easier to get powers of attorney, health care directives etc now while Dad is competent to execute them than having to deal with a guardianship that would involve having a lawyer and going to court. Although it is hard to do, try as delicately as possible to have Dad express to you his final wishes so you will know in case it comes to a point he won't be able to adequately express them.
Good luck with everything.
Charles