We built Rhome in part because of conversations we had with buyers who came to us after their co-ownership had already gone sideways. Not because the property was a bad investment or because they did not like each other, but because the structure was missing or incomplete from the start. The problems that arose were predictable. The same five patterns came up repeatedly across groups with very different backgrounds, in different cities, buying different types of properties.
This is not a list of edge cases. These are the common failures. If you are planning a group home purchase, you will recognize the dynamics. The good news is that each one is preventable with structure built before closing.
1. No written exit terms
The most common source of co-ownership conflict is also the most avoidable. Two buyers close on a property together with a mutual understanding that they will "figure it out" if circumstances change. The mutual understanding is real. The problem is that "figure it out" is a negotiation strategy, not a plan, and it works only when both parties are still fully aligned and things are still easy.
Consider two buyers who close in early 2024 with a plan to hold the property for about five years. By late 2025, one of them has a serious partner who lives in another city and wants to relocate. Nothing in writing specifies what happens in this scenario. The conversation that follows becomes a negotiation over the property's value, who has the right to force a sale, and whether the staying co-buyer has the option to buy out the leaving co-buyer. Every aspect of that conversation is contested ground, because nothing was defined while both parties were willing.
Written exit terms are not a sign of distrust. They are an acknowledgment that life changes over a five-to-ten year period, and that having agreed procedures for change is more respectful than leaving everything to future negotiation.
2. Mismatched ownership timelines
Two buyers with different hold horizon expectations are heading toward a predictable conflict. One buyer plans to hold the property for three or four years, then use the appreciation to fund a solo purchase elsewhere. The other buyer is planning for the long term, sees the property as a generational asset, and has no intention of selling in the near term.
This misalignment is not always obvious at the time of purchase. Both buyers may be genuinely excited about the property. Both may be planning "something around five years," without recognizing that one person's five years is a hard deadline and the other's is the soonest they would consider selling. That gap between soft and hard timelines surfaces when the faster-timeline buyer wants to list and the slower-timeline buyer is not ready.
A co-ownership agreement with explicit exit timeline provisions handles this: what constitutes a trigger event for either buyer, what the right of first refusal procedure looks like, and what happens if neither buyer can buy out the other within the agreed window. When this is written down while both buyers are aligned, it is a simple clause. When it comes up after the first buyer announces they want to sell, it is a dispute.
3. Informal payment splitting
Many co-buying groups handle monthly mortgage payments informally: one buyer pays the full mortgage from their bank account, and the other transfers their half each month. This works until it does not. The month one co-buyer is short on cash, or the month a transfer gets delayed, is the month the other co-buyer's credit is potentially exposed to a late payment on the joint mortgage.
The informal arrangement also creates ambiguity at exit. If one co-buyer consistently paid slightly more than their share over three years, do they receive additional credit at sale? If one co-buyer paid for a major repair from their own funds and the other did not contribute, what does that mean for ownership percentages at exit? None of this is cleanly resolvable from memory and good intentions; it requires records and agreed accounting from the start.
A payment structure section in the co-ownership agreement defines exactly who is responsible for what amount, how shared costs are handled, and what the procedure is when a payment is missed. Alongside the agreement, a shared payment ledger maintained from closing forward means the records exist when the exit calculation needs to be made.
4. Renovation and property decisions without a decision protocol
Two buyers with different renovation philosophies sharing a property is a reliable source of ongoing friction. One wants to update the kitchen; the other thinks the money is better left in savings for market volatility. One wants to rent out a room; the other is uncomfortable with a stranger in the property. One wants to paint the exterior a striking color that reflects their taste; the other is thinking about resale value.
These disagreements are minor when the co-buyers have a decision protocol: a defined process for how joint decisions are made, what decisions require mutual agreement, and what a deadlock resolution looks like. Without a protocol, each decision becomes a negotiation, and the accumulation of minor negotiation friction is a significant quality-of-life cost over a multi-year co-ownership.
A simple decision protocol might specify: decisions under a certain cost threshold (say, $1,500) can be made unilaterally by either co-buyer with notice to the other; decisions above that threshold require mutual agreement; decisions affecting rentability or the right to occupy require unanimous agreement. The thresholds can be whatever the group agrees on, but having them written down means the conversation about a repair is about the repair, not about who has the authority to make the call.
5. Treating the down payment contribution as a sunk cost with no equity implications
Groups with unequal down payment contributions sometimes start with a 50/50 equity split, reasoning that the larger contributing buyer will eventually catch up through higher monthly payments or that it is just easier to keep everything even. In the short term, this feels generous and uncomplicated. Over a multi-year ownership, it erodes the financial equity of the larger contributor in ways that are not always visible until exit.
An example: two buyers close on a $480,000 property. Buyer A contributes $40,000 to the down payment; Buyer B contributes $20,000. They hold the property for six years and sell at $600,000. With a 50/50 equity split, after mortgage payoff and transaction costs, both buyers receive roughly the same proceeds. Buyer A, who put in twice the down payment, effectively subsidized Buyer B's equity position over the entire hold period.
A contribution-weighted equity split assigns ownership percentages based on actual financial inputs: down payment share, ongoing payment responsibility, and any additional contributions for capital improvements. This is not a punitive approach to co-buying; it is an accurate accounting of what each person put in and what they should receive when the property is sold. Groups that set the equity split correctly before closing avoid a difficult conversation about fairness when the sale proceeds are being calculated six years later.
