There is a framing problem with co-ownership agreements that causes many co-buyers to underinvest in them. The framing is: an ownership agreement is what you do when you do not fully trust the people you are buying with. This framing is backwards, and it leads to real harm.
An ownership agreement is not evidence of distrust. It is evidence that you understand what you are each putting into this and you respect each other enough to be specific about it. You are both taking on a joint legal obligation on a mortgage, committing real capital to a down payment, and agreeing to co-own an illiquid asset for potentially a decade. The least you can do for each other is be clear in writing about what that means.
The groups that skip the ownership agreement are often the ones that get into the most serious trouble later, precisely because the friendship is strong and the trust is high. High trust at closing does not mean circumstances will not change. Jobs relocate. Incomes shift. Relationships end. People's life plans, by definition, evolve over a decade. An agreement is not a hedge against bad intentions; it is a hedge against a future that will not look like today.
What a co-ownership agreement actually contains
A complete co-ownership agreement for a residential property covers four core areas. Not every agreement covers all four with equal depth, but a document that is missing any of them has a meaningful gap.
The first is ownership structure and equity allocation. How much of the property does each person own? This is typically expressed as a percentage and should reflect each person's actual financial contribution: down payment share, ongoing mortgage contribution, and any agreed additional contributions for major repairs or improvements. A 50/50 split when contributions are 60/40 is not fair to the person contributing more; it needs to be a conscious, documented choice if that is what the group decides.
The second is the payment and cost structure. Who is responsible for what portion of the monthly mortgage payment? How are property taxes and insurance paid? What happens to shared expenses when one co-owner is temporarily unable to pay? What is the procedure if one co-owner misses a payment: how much time do they have to cure it, and what happens if they cannot? The mortgage is a joint legal obligation. Missed payments affect both co-owners' credit and put the property at risk. The procedure for handling payment failures needs to be specific.
The third is decision-making authority. Some decisions affect both co-owners and require mutual agreement: selling the property, refinancing, adding a new co-owner, taking out a home equity line of credit. Others are more routine and can be handled by one party alone: scheduling a plumber, replacing an appliance, making cosmetic improvements under a certain cost threshold. The agreement should define which category decisions fall into and how disputes in the mutual-decision category are resolved.
The fourth is exit provisions. What happens when one co-owner wants to sell and the other does not? What happens when both want to sell but disagree on timing or price? How is the property valued at exit, who has the right to buy out the other, and on what timeline? These provisions are discussed in more depth in a separate piece on exit clauses; the point here is that they belong in the agreement alongside the financial structure, not as a separate document added later.
Why boilerplate templates fall short
There are generic co-ownership agreement templates available online, and using one is better than having nothing. But a template designed for generic use does not know what your equity split is, what each person contributed to the down payment, or what your exit horizon looks like. It gives you a structure to fill in, but a template left largely blank is not an agreement; it is a form.
The value of a properly structured co-ownership document is in the specifics: the actual equity percentages, the calculated monthly contribution schedule, the buyout formula using the real loan balance and an agreed valuation method. These numbers come from the actual transaction, and they need to be in the document for it to function as an agreement when something goes sideways.
A common pattern we see is groups who took a generic template, filled in their names and percentages, and left the exit clause section at the template default language: something along the lines of "parties agree to negotiate in good faith." That clause is not enforceable in any meaningful way. "Negotiate in good faith" is what you do before you have an agreement. It is not the agreement.
The attorney's role and what to bring them
A co-ownership agreement for a residential property purchase in Florida should be reviewed by an attorney who practices real estate law in Florida. This is not an area where self-drafting without review is advisable. Property law is state-specific, the intersection of co-ownership and mortgage law involves some nuanced Florida-specific provisions, and an agreement that looks complete but has an unenforceable clause in a critical section provides false comfort.
Attorney review does not have to be expensive. The cost is determined largely by what the attorney starts with. A blank page takes longer than a structured document with all the relevant numbers and agreed terms already populated. Rhome's approach is to build the equity structure, payment schedule, and exit terms as a structured starting document that a co-buying group brings to attorney review. Review of a well-structured document can often be completed in under two hours of attorney time. A Florida real estate attorney billing at standard rates would charge considerably less for review than for drafting from scratch.
The goal is not to replace attorney review but to reduce what review is needed so that the cost stays at the lower end of what is realistic. Attorney-drafted co-ownership agreements in Florida range from $800 to $2,000 depending on complexity. The attorney review packet Rhome produces is designed to get groups to the lower end of that range by doing the structural work upfront.
The test of a good co-ownership agreement
A well-drafted co-ownership agreement should be able to answer five questions without requiring interpretation:
If co-owner A stops paying their share of the mortgage for three months, what happens specifically and on what timeline? If co-owner B needs to relocate for work in 18 months, what options are available to them and to co-owner A, and what is the process for executing each? If both co-owners want to sell but disagree on the listing price by $40,000, who decides and how? If the property appreciates 30% from the purchase price and one co-owner wants to refinance to extract equity and the other does not, what is the resolution path? If one co-owner dies, what rights does the surviving co-owner have with respect to the deceased's share?
These are not exotic scenarios. They are the events that affect residential co-owners over a typical five-to-ten year ownership period. If your agreement cannot answer these questions specifically and unambiguously, it has gaps that need to be addressed before closing.
