Does a co-owner have to agree to the sale?

When two siblings disagree after an inheritance because one wants to sell the apartment and the other wants to wait, the most common question is simple: does the co-owner have to agree to the sale? The answer is not the same in all situations. It mainly depends on whether you are selling only your co-ownership share or if the entire property is to be sold.

This is often where the most confusion lies. Owners are frequently dealing not just with the apartment or house itself, but also with an underlying life situation—settlement after a divorce, inheritance, financial pressure, or the need to finally close a chapter. The longer it remains unclear what can be done without another person's consent and what cannot, the easier it is for the sale to become stalled.

Does a co-owner have to agree to the sale of the entire property?

If the entire property—such as an apartment, house, or land—is to be sold as a single unit, the consent of all co-owners is generally required. This makes practical sense. No one can unilaterally decide to sell a portion that does not belong to them.

Therefore, if you own half of an apartment and your ex-partner owns the other half, it is not enough that you have a good reason to sell. A buyer typically wants to acquire the entire property, not enter into a complicated relationship with another co-owner. Without an agreement between both parties, the sale of the whole property usually cannot move forward.

In practice, this means one thing: if you want to sell the whole unit, you need to align on the price, timeline, move-out process, and basic contract terms. Disagreements usually involve not just whether to sell, but for how much, to whom, and when.

When you do not need consent

A different situation arises if you are not selling the entire property, but only your co-ownership share. That share is yours, and generally, you can dispose of it. This means you can offer your share for sale even if the other co-owner does not agree.

However, this does not mean that such a sale is simple. Selling a share is usually significantly more complicated than selling an entire apartment or house. The buyer is not purchasing a standalone usable property, but rather a share of ownership. They are often inheriting future disputes, uncertainty regarding usage, and the need for further agreements with the other co-owner.

Legally, you may be in a position where you do not need consent, but commercially, you run into reality. A share usually sells more slowly, sometimes at a discount, and often to a limited group of interested parties. For an owner who wants to resolve the situation calmly and without further complications, this may not be the best first option.

The difference between selling a share and selling the whole

It is good to clarify this boundary right at the beginning. When one co-owner says "I want to sell," they could mean two completely different things.

The first possibility is that they want to sell their share and exit the co-ownership. The second is that they want the entire property sold and the proceeds divided according to shares. From the outside, it sounds similar, but the process, negotiation, and risks are different.

When selling a share, you are mainly dealing with who would buy such a share and under what conditions. When selling the whole, the agreement of the co-owners is key. If one person is blocking the process, advertising alone will solve nothing. Without a joint decision, the deal will not take off or will end at a stage where the prospective buyer loses trust.

What if the other co-owner does not agree?

Disagreement does not always mean a definitive stop. Often, it is not just a hard "no," but a fear of the price, the move-out deadline, an unknown process, or a feeling that someone is being pushed into a quick decision.

This is typical after an inheritance. One heir wants to settle the assets and use the money, while the other has an emotional attachment to the apartment or fears it will be sold below value. Similarly, during a divorce, one needs to close a past chapter, while the other delays the decision because they are dealing with children, new housing, or financing.

In such moments, it helps not to focus immediately on the signature on the contract, but first to level the basic framework. What is a realistic selling price? What will happen after the sale? What is the timeline? Who will prepare the documents? Who will communicate with interested parties? This is where the situation often calms down because a concrete plan emerges from an indefinite conflict.

Pre-emptive rights and other restrictions

Owners often ask about pre-emptive rights as well. The rules have changed in recent years, which is why there is confusion. It is impossible to rely on old advice from an acquaintance or experience from another case.

With co-ownership shares, it is always necessary to check specific circumstances and the current legal status. This also applies to situations where the share was created by inheritance or another means, as well as the arrangement of property usage between co-owners. It is not enough to know what "usually happens." For a sale, it is important to work with what applies to your property right now.

That is why it makes sense to get documents in order first and verify what is actually registered and which steps follow one another. It will save time and unnecessary clashes between co-owners.

When an agreement is not working but you don't want to make a hasty step

In a tense situation, it is tempting to say: I will sell my share to anyone and have peace. Sometimes that is a legitimate solution. Often, however, it leads to a further deterioration of relationships and a loss of value.

First, it is reasonable to evaluate whether there is a chance to sell the entire property under clearly set conditions. For typical residential properties, the whole usually yields a better result than selling a share independently. Not because it is a universal rule, but because a buyer understands an apartment or house as a whole much more easily than a co-ownership relationship.

If an agreement is not working, it is good to separate emotions from the process. One thing is that you do not personally agree with the other co-owner. Another is whether there is a process that can be practically agreed upon. Sometimes an independently set valuation helps, other times a precise schedule of steps or a pre-described decision-making method. Once both sides know what is happening and what will come next, the room for arguing shrinks.

How to proceed when dealing with a sale in co-ownership

First, clarify exactly what you want to sell. Whether your share or the entire property. This sounds obvious, but in many cases, this question is not named out loud, and therefore the dispute goes in circles.

Then it makes sense to determine three things: the ownership status, the realistic price, and which scenario is feasible given the stance of the other co-owner. Only then does it make sense to deal with the presentation, interested parties, and deadlines.

When selling an entire property, it is important that the process is organized from the beginning. It is not enough to post an ad and hope that the co-owners will figure it out along the way. When conditions are not unified in advance, every buyer recognizes the uncertainty very quickly. In practice, this means lower trust, more delays, and a weaker negotiating position.

This is why it is useful to have a single managed process for the sale, where it is clear who prepares the documents, how decisions are confirmed, and what follows each step. With co-ownership, the problem is usually not just to "sell the property," but mainly to keep communication, documents, and deadlines together so the situation does not worsen.

Most common misconception: if I have a share, I can decide on everything

This is a mistake that can prolong a sale by many months. Owning a share does not mean having the right to independently sell the entire apartment or house. Likewise, the disagreement of the other co-owner does not mean that nothing can be done.

Between these two extreme notions, there is space for several solutions. Sometimes it makes sense to try to sell the whole. Sometimes to settle between co-owners. And sometimes it is really appropriate to work with the sale of a share. The deciding factor is not what would be theoretically easiest, but what will reduce chaos, the risk of a bad decision, and unnecessary losses in your situation.

So, if you are addressing the question of whether a co-owner must agree to a sale, do not start with emotions or impressions from a family debate. Start with what is actually being sold, who can decide on it, and what procedure has a chance to really move the situation forward. The first good step is not pressure for a signature. It is clarity.