When you need to sell and buy a home at the same time in Seattle, everything hinges on one question: what does your current home actually sell for?
You already know what you want next, but you can't make a strong offer while your current home is still unsold, and your savings alone rarely cover a second down payment. Most homeowners solve this with a contingent offer, tying the new purchase to selling the old one first. It feels like the safe choice, but in a market like Seattle's, where strong homes draw multiple offers, sellers can afford to pick buyers without conditions attached.
This guide walks through a process that lets you sell and buy at the same time, without a contingency, temporary housing, or carrying two mortgages at once.
The Home Sale Contingency Problem When You Sell and Buy a Home at the Same Time
A home sale contingency is a condition in your purchase offer. It says you'll buy the new home only if your current home sells first, usually by a set date. On paper, it protects you. You won't end up owning two homes at once, or scrambling to cover a down payment you don't have yet.
To a seller, that same condition looks different. They see a sale that depends on another sale they can't see, can't control, and can't speed up. Every seller wants a clean, predictable closing. A contingent offer adds a second unknown on top of the first one, and that unknown belongs to someone else.
The market you're in changes how much this matters when you sell and buy home at same time. In a buyer's market, homes sit longer, and sellers have fewer offers to pick from, so they may accept a contingency because the alternative is more waiting.
In a seller's market, like much of Seattle right now, homes often get several offers within days. A seller choosing between three clean offers and one contingent offer has an easy decision, and it's rarely the contingent one.
Some sellers who do accept a contingency add a kick-out clause. It lets them keep marketing the home while your contingency is active. If a stronger, non-contingent offer comes in, the seller can give you a short window to remove your contingency or walk away. The pressure that was supposed to protect you ends up right back on you.
The real fix isn't writing a better contingency. It's removing the need for one so you can sell and buy a home at the same time, starting with your home equity and a locked-in buyer for your current house.
How to Prepare Your Equity and Your Buyer Before You Sell and Buy a Home at the Same Time
Before you remove a contingency from your offer, you need one number: how much equity you have in your current home, the gap between its value and what you still owe. This number decides what options are open to you, so confirm it first, not last.
Most programs built for this purpose require a minimum equity position, generally around 22%. A real estate agent or lender confirms this by comparing your home's current market value to your remaining loan balance.
With equity confirmed, the next step is locking in a buyer for your current home. A listing is a hope; it waits for the right offer on its own schedule. A guaranteed purchase contract is different. It's a committed agreement on your current home, secured before you make an offer on a new one.
That guaranteed contract is what replaces the sell-first condition. Instead of telling a seller "I'll buy once mine sells," you can say your home is already under a binding agreement. No listing to wait on, no uncertainty about whether a buyer shows up.
This has to happen before you start shopping for your next home, not after. Equity confirmed, and a guaranteed buyer in place means every offer you make starts from strength, not hope.