You have to qualify to take a partial exclusion. PUB 523
To do a 1031 exchange you also have to qualify. For more information please see 1031.
Beware of schemes
Taxpayers should be wary of individuals promoting improper use of like-kind exchanges. Typically they are not tax professionals. Sales pitches may encourage taxpayers to exchange non-qualifying vacation or second homes. Many promoters of like-kind exchanges refer to them as “tax-free” exchanges not “tax-deferred” exchanges. Taxpayers may also be advised to claim an exchange despite the fact that they have taken possession of cash proceeds from the sale.
What property qualifies for a Like-Kind Exchange?
Both the relinquished property you sell and the replacement property you buy must meet certain requirements.
Both properties must be held for use in a trade or business or for investment. Property used primarily for personal use, like a primary residence or a second home or vacation home, does not qualify for like-kind exchange treatment.
Both properties must be similar enough to qualify as "like-kind." Like-kind property is property of the same nature, character or class. Quality or grade does not matter. Most real estate will be like-kind to other real estate. For example, real property that is improved with a residential rental house is like-kind to vacant land. One exception for real estate is that property within the United States is not like-kind to property outside of the United States. Also, improvements that are conveyed without land are not of like kind to land.
The first limit is that you have 45 days from the date you sell the relinquished property to identify potential replacement properties. The identification must be in writing, signed by you and delivered to a person involved in the exchange like the seller of the replacement property or the qualified intermediary. However, notice to your attorney, real estate agent, accountant or similar persons acting as your agent is not sufficient.
Replacement properties must be clearly described in the written identification. In the case of real estate, this means a legal description, street address or distinguishable name. Follow the IRS guidelines for the maximum number and value of properties that can be identified.
The second limit is that the replacement property must be received and the exchange completed no later than 180 days after the sale of the exchanged property or the due date (with extensions) of the income tax return for the tax year in which the relinquished property was sold, whichever is earlier. The replacement property received must be substantially the same as property identified within the 45-day limit described above.
