How to Buy and Sell at the Same Time Without Getting Trapped

A plain-language guide to subject-to-sale offers, 48-hour clauses, and the right sequence for Calgary home buyers and sellers doing both at once.

Buying your next home while selling the one you live in sounds neat and tidy. In reality it’s a juggling act — doable, but only if you understand the rules.

What “Subject to Sale of Buyer’s Home” Actually Means

An offer subject to selling your home is a weak offer. Sellers do accept them — but the home does not come off the market. The seller keeps showing the property, keeps taking calls, and keeps inviting better offers.

The 48-Hour Clause: How It Works and What Triggers It

If another buyer shows up with a clean offer — or even an offer subject only to your deal collapsing — the seller can trigger the 48-hour clause. Here’s what happens:

• The seller gives you written notice — typically 48 hours, sometimes 24
• You must waive your condition of selling your home and firm up the deal
• If you don’t waive, your deal dies and the seller moves on

Everything in real estate is negotiable, including the clause length. Sellers typically want 24 to 48 hours, but you can ask for 72 hours, 5 days, or even 7 days in the right situation. Whether you get it depends on market conditions, how desirable the property is, the strength of your overall offer, and how well your Realtor presents your position.

Why Being Listed First Changes Everything

If your home is already listed when you make an offer, you’re in a far stronger position. You can tell the seller you’re actively listed and priced to sell. You can negotiate longer timelines. You look prepared, not hopeful. Sellers are more patient with buyers who are already in motion.

If you already have an offer or strong interest on your current home, your leverage improves again.

The Right Sequence: Five Steps to Get It Right

1. Prepare your current home first — declutter, repairs, staging decisions made before anything else
2. List before you shop seriously — active listing status is your strongest negotiating card
3. Know exactly what you can waive and when — financing pre-approved, numbers confirmed
4. Have financing, pricing, and timelines lined up — no surprises when the clock starts
5. Use conditions strategically, not emotionally — every condition has a cost; use them deliberately

When done right, buying and selling at the same time is smooth. When done wrong, it’s stressful and expensive.

Buying subject to selling isn’t wrong — but it comes with strings, and sellers hold most of them. The strongest move is to get your house on the market before you write that offer.

One more thing worth knowing: as both a buyer and a seller, you’re in a strong position to negotiate real estate commissions with your Realtor. Don’t overlook it.

Frequently Asked Questions: Buying and Selling at the Same Time in Calgary

Should I sell my home before buying in Calgary?

In most cases, yes — or at minimum, get your home listed before writing an offer on your next one. Selling first removes the financing risk entirely. Being listed first gives you negotiating leverage and makes sellers take your offer more seriously than an unlisted buyer making a subject-to-sale offer.

What is a subject-to-sale condition in Alberta real estate?

A subject-to-sale condition means your offer to purchase a new home is conditional on selling your existing home within a set timeframe. The seller accepts your offer but continues marketing the property. If a better offer comes in, they can trigger the 48-hour clause, forcing you to either waive the condition or walk away.

Can I negotiate the 48-hour clause in Alberta?

Yes. The clause length is negotiable like any other term. While 48 hours is the most common, you can request 72 hours, 5 days, or more in the right circumstances. A seller in a less competitive market or one who values a smooth transaction may agree to a longer window. Your Realtor’s ability to present and negotiate this clause matters significantly.

What happens if I can’t sell my home in time?

If you can’t waive the subject-to-sale condition before the deadline — either because your home hasn’t sold or because you’re not financially ready to proceed — the purchase contract collapses and your deposit is returned. The seller is then free to accept the competing offer. This is why having your home listed and priced correctly before making an offer on a new property is so important.