I love the book "Every Landlord's Tax Deduction Guide" by Stephen Fishman. It does a great job of explaining things at a level that smart, but inexperienced, people can understand. In it he says 3 things that are important:
1. How you allocate your land/improvement ratio is the single most important factor that determines how much depreciation you deduct each year. You want your land to be worth as little as possible.
2. The IRS has no guidelines as to how you should calculate that ratio, so you can use any reasonable, defendable method that gives you the best answer.
3. Among the ways you could make the calculation are:
a) Your property tax bill (or help from the county office)
b) The replacement cost of your building and improvements
c) buyer-seller valuations
d) comparable land sales
anything else you can come up with that is reasonable, and you could defend to the IRS in the event of an audit. Since this info is never included in a tax return, the only time they would even question your method is if you get audited.
So, be honest and fair, but do everything you can to make the value of your home as high as possible, and the land as low as possible.
Good luck.
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