Sellers Overvalue. Buyers Undervalue. The Same Psychology Is Behind Both.

There is a consistent pattern in real estate that no amount of market data has ever fully eliminated.

Sellers price their homes higher than comparable sales support. Buyers resist paying what sellers ask. Both sides feel entirely rational. And both sides are experiencing the same underlying force, pulling in opposite directions.

That force has a name: the endowment effect.

Understanding it does not make the emotions disappear. But it does make the negotiating table a great deal less confusing.

What Is the Endowment Effect?

The endowment effect is a well-documented cognitive bias: people consistently assign a higher value to things simply because they own them.

It is rooted in loss aversion. Selling something you own is not experienced as a neutral exchange. It registers as a loss. And the psychological pain of a loss consistently outweighs the pleasure of an equivalent gain.

When a homeowner sets a price, they are not just calculating what a house is worth. They are calculating what it would cost them emotionally to let it go.

Studies indicate that people tend to value their own possessions 20 to 50 percent higher than they would if they did not own them. In real estate, that gap has a measurable consequence: research found the average spread between what sellers were willing to accept and what buyers were willing to pay was around 7 percent. That is not a negotiating tactic. It is a structural psychological difference in how the two parties are experiencing the same property.

How the Endowment Effect Shows Up on the Seller’s Side

For a seller, the endowment effect operates on several levels at once.

The Financial Investment

Sellers often anchor their price to what they have put into a home rather than what the market will bear.

The kitchen that cost $85,000 to renovate feels like it should return $85,000 in value. The market, which does not care what anything cost, prices it on what a buyer is willing to pay for a kitchen in that neighborhood at that moment. Those two numbers are frequently different.

The Emotional Investment

Seventeen years of holidays, children growing up, a backyard where every summer happened. These memories are real and they matter.

They do not, however, transfer to the buyer. The buyer is standing in an empty house doing square footage calculations. The seller is standing in the same rooms hearing echoes. They are not evaluating the same property.

The Assumption of Shared Perception

Many sellers believe that because they love the house, buyers will too, and that the premium they place on it is objectively justified.

This assumption consistently leads to overpricing. And overpricing has a well-documented cost:

• Homes that sit on the market too long become stigmatized

• Buyers assume something is wrong

• Price reductions that could have been avoided at listing become necessary

The final sale price is often lower than it would have been with correct pricing from the start.

How the Endowment Effect Shows Up on the Buyer’s Side

The endowment effect does not only disadvantage sellers. It works against buyers in a different, less-discussed way.

Before Ownership: Natural Skepticism

Before a buyer owns a home, they are evaluating it from the outside. They are naturally skeptical, resistant to the asking price, and focused on what is wrong with it rather than what is right with it.

This is not cynicism. It is simply the absence of ownership. The endowment effect has not yet taken hold.

Once Psychological Ownership Begins

The moment a buyer starts mentally placing their furniture in the living room, imagining Sunday mornings in that kitchen, or mentally claiming the yard, something shifts.

Behavioral economists call this psychological ownership. And once it begins, willingness to pay increases and resistance to the asking price softens. It is a documented mechanism, not a sales technique.

After a Missed Offer

If a buyer loses a home in a competitive situation, the grief they feel is often disproportionate to how interested they seemed during the showing. That is the endowment effect arriving late.

The house that felt like a reasonable option during the tour becomes, after a lost offer, the one that got away. This can lead to overbidding on the next property out of emotional overcorrection. It is worth watching for.

The Negotiation Gap

When a seller overvalues and a buyer undervalues the same property, the gap between them is not just a negotiating difference. It is two people operating on fundamentally different psychological frameworks.

Sellers are managing loss. Buyers are managing skepticism.

A good transaction requires both sides to move toward a shared reality, and that shared reality is what comparable market data exists to establish.

Research has shown that simply presenting clear, visual market data to both parties reduced the endowment gap from roughly 7 percent to under 3 percent. The effect did not disappear, but it narrowed significantly.

This is why price conversations grounded in evidence, not opinion, matter so much. The question is never what a seller feels their home is worth, or what a buyer thinks they should pay. It is what the market has consistently demonstrated for comparable properties in comparable condition.

For Greater Baltimore, where neighborhoods vary sharply over short distances, that analysis requires genuine local knowledge. The endowment premium a seller in Ruxton places on their property is informed by a different comparable set than a seller in Roland Park or Hunt Valley. The bias is universal. The market data that counterbalances it is deeply specific.

What to Do With This Information

If You Are Selling

The most useful thing the endowment effect explains is why the first CMA feels wrong.

The number that comes back from a comparative market analysis almost always feels low to the seller. That is not because the analysis is flawed. It is because the seller is experiencing their home through the lens of ownership, and the analysis is reflecting the market’s view from the outside.

Both perspectives exist. Only one of them sets the sale price.

The productive response is not to suppress the emotional attachment. It is to separate it from the pricing decision. The memories belong to the seller. The market price belongs to the data. Keeping those two things in separate categories tends to lead to cleaner pricing, faster sales, and better net outcomes.

If You Are Buying

The endowment effect is a useful lens for evaluating your own reactions during a search.

A few things worth watching for:

• A property that felt like a four out of ten during the showing starts to feel like an eight after an offer is submitted. That shift is worth examining before escalating.

• A buyer keeps finding reasons to hesitate on homes that objectively meet their criteria. It may be that the endowment effect from a previous home is still doing its work.

• After losing a bid, the instinct to overbid on the next property to avoid the same feeling. Recognizing that impulse for what it is tends to produce better decisions.

The endowment effect is not a flaw in the process. It is a feature of being human, and it shows up in every real estate transaction regardless of price point.

Knowing it is there does not make it disappear. It does make the process considerably easier to navigate.

The O’Hara Group has guided buyers and sellers through Greater Baltimore’s most complex markets for over 20 years. If you are thinking about a move and want a candid conversation about where the market actually stands, reach out at claudia@theoharagroup.com or 410.274.2936.