Simultaneously selling one home and buying another requires solid financing, careful planning, and creative crisis management.

Always Sell Before You Buy.
It may sound like common sense, but if you're like many sellers, you probably started shopping for houses before you even thought about what it would take to sell your current home.

Why Sell First?
Most experts agree that you should close on the sale of your current home before committing to another piece of property. Doing this virtually eliminates the financial risk: You'll know how much money you have for your down payment, and you won't have to arrange for interim financing. In addition, carrying two houses simultaneously, places you in a much weaker negotiating position on the sale price of the original home.

If you can negotiate a sale-leaseback, you can rent your home from the buyer for a month or two while you look for your next house. If you can't arrange to rent your current house, you will probably have to rent a home temporarily— but it's usually cheaper to pay rent plus moving costs than to run the risk of having to pay two mortgages plus taxes and insurance for several months. It is almost always better to sell your current home first. Usually lenders make the payoff of your current home loan a condition of their approval for a new mortgage. Therefore, careful synchronization of the two tandem transactions is important.

Selling Before You Buy
If you've started looking for another house and your own home isn't already on the market, stop shopping and start preparing your house for sale.

1. Know your home's value.
   Get an estimate of your home's value.Obtain a comparative market analysis from your real estate agent (or an appraisal if you're selling the house yourself) to determine your home's approximate value.
2. Get pre-approved.
   Estimate the minimum amount of cash you can expect from the sale and get pre-approved for a loan.
3. Get an inspection.
   Order a pre-sale inspection of your home and make the necessary repairs and decorating changes.
4. Launch your sale.
   Now you can start shopping in earnest for your next home.
5. Mind the timing.
   If you haven't yet found your new home by the time you accept an offer, negotiate a flexible closing date or a sale-leaseback. If the buyer wants to close quickly, arrange for temporary housing. Avoid making an offer on a new home until most of your purchase contract's contingencies have been satisfied.
6. Close your sale.
   Deposit the proceeds while you look for your next house.

Buying Before You Sell
If circumstances have placed you in the position of buying before you sell, managing the two transactions becomes more complicated.

If you've already made an offer on a new home:

1. Structure your offer.
   Negotiate a flexible closing date, or make the purchase contingent on the sale of your current home. Such a contingency is a seller's nightmare, but in a slow market the seller may be willing to accept the offer. More important, it gives you an escape if your house doesn't sell. You may want to consult a real estate attorney on the exact wording of your contract.
2. Start preparing your house for sale.
   Consider pricing carefully. You may need to list at a lower price to speed your sale. You also may have to offer incentives such as a home warranty.
3. Find a lender.
   Secure interim financing so that you may purchase your next house while your current house is for sale. So-called bridge loans are made against the equity in your current house and cost more than traditional home loans.
4. Focus on selling your house.
   Help the agent any way you can, and maintain the home's appearance. If you get an offer you want to accept, verify the buyer's creditworthiness, avoid any contingencies that could delay closing, and try to schedule a closing date before the closing of your other purchase contract to avoid interim financing.
5. Follow through with your purchase.
   If you have not sold your house, and your purchase contract on your next house does not have a contingency that allows you to back out, you are still committed to the purchase. Consult with your agent and a real estate attorney. If you proceed with the purchase, adjust your budget and consider more drastic action to sell your current home.
6. Close.
   If you’re forced to purchase first, your former residence immediately becomes a financial drain and you must accept the fact that you must do whatever is necessary to get this property sold.