How Should a Sponsor Structure a Family Office Co-Investment Right For Follow-On Real Estate Projects?

A sponsor should grant a family office co-investment right only with written rules for allocation, notice, fees, conflicts, and exit governance. Clear mechanics preserve GP flexibility, give the LP a predictable process, and reduce friction on follow-on raises.

A family office LP that commits to your first deal will often ask for a co-investment right on future projects before signing. Most sponsors grant the request. Few define what it actually means.

That gap creates problems on follow-on raises. When a family office believes it was passed over for a deal, the friction surfaces in LP communications, in side letter renegotiations, and sometimes in capital withdrawn from the relationship entirely. The source of that friction is almost always the same: the co-investment right was granted as a relationship gesture and never reduced to enforceable mechanics.

Understanding how family offices evaluate deal-by-deal structures versus blind pool commitments is the starting point for any co-investment conversation, because the right means something different depending on which structure governs the LP's initial commitment. Before granting a co-investment right on follow-on projects, sponsors raising $5M to $250M in equity need four mechanics defined in writing: allocation methodology, notification timeline, fee treatment for the co-invest vehicle, and conflicts-of-interest disclosure. Each one is covered below.

What this guide covers:

• The difference between a co-investment right and a co-investment obligation
• The four structural elements that make a co-investment right enforceable
• How to set allocation methodology and notification timelines that protect GP flexibility
• What fee treatment family offices expect on co-invest vehicles
• How exit governance and drag-along exposure apply to co-investors
• The drafting gaps that generate relationship friction on follow-on raises

Co-Investment Right vs. Co-Investment Obligation

A co-investment right gives a family office LP the opportunity to participate in a follow-on project on specified terms. The LP can accept or decline. A co-investment obligation requires the LP to fund a designated allocation when the GP calls capital, whether or not the LP has separately reviewed and approved that specific deal.

The distinction matters for how each party plans around future transactions.

Most family offices request a right, and most sponsors intend to grant a right. The problem arises when the LPA or side letter uses language that could be read as an obligation, or when the right has no defined mechanics for how it gets exercised. Language like "the LP shall have the right to co-invest in future projects on the same terms as other investors" sounds reasonable but leaves every material question unanswered: which projects, how much allocation, on what timeline, and at what fee level.

The practical test: if a sponsor could skip a family office on a follow-on deal and the LP would have no contractual basis to object, the right is defined. If the LP could argue it was owed participation, the drafting has created an implied obligation without the structure to support one.

For sponsors still working through how to present funding needs to family offices before these conversations begin, the co-investment right discussion typically surfaces during term sheet negotiation, and the time to define mechanics is before the LP commits, not after.

The Four Mechanics That Make a Co-Investment Right Enforceable

A co-investment right with no defined mechanics is a relationship expectation documented in legal language. Four elements convert it into an enforceable provision that both parties can rely on.

1. Allocation Methodology

The LPA or side letter must specify how much of each follow-on project the family office can access and how that amount is determined. Common approaches include:

• Fixed percentage: The LP may co-invest up to a stated percentage of total project equity, regardless of deal size
• Pro-rata based on initial commitment: The LP's co-invest allocation scales with its proportional share of the initial deal
• Dollar cap: The LP may co-invest up to a fixed dollar amount per project, subject to GP discretion above that threshold
• GP discretion with floor: The GP retains allocation authority but commits to offering a minimum participation opportunity on each qualifying project

Fixed-percentage and pro-rata methods are more defensible because they give the LP a calculable expectation. GP-discretion approaches are easier to administer but create the most friction when a family office believes it received less than it should have.

The allocation methodology should also specify whether the right applies to all follow-on projects or only those that meet defined criteria, such as asset class, geography, or minimum equity raise size.

2. Notification Timeline

The right means nothing without a defined window for the LP to respond. The notification provision should state:

• How many calendar or business days in advance the GP will notify the LP of an available co-investment opportunity
• What form the notice takes (written, email, formal capital call notice)
• How many days the LP has to confirm participation after receiving notice
• What happens if the LP does not respond within the window (the right lapses for that project)

Shorter windows protect GP flexibility on time-sensitive deals. Longer windows give family offices adequate time for internal investment committee review. The ILPA Principles 3.0 guidance on co-investment practices recommends that GPs provide LPs with sufficient time to conduct independent due diligence before the co-investment window closes, though specific timelines are left to negotiation.

A workable structure for most real estate deals: the GP provides written notice before the co-invest allocation closes with enough lead time for the LP's investment committee to convene, the LP confirms participation within a defined window, and silence within that window is treated as a pass for that project.

3. Fee Terms for the Co-Invest Vehicle

Family offices that request co-investment rights typically expect reduced or eliminated management fees and carried interest on the co-invest vehicle, separate from the fees on the primary LP commitment. The Akin Gump 2026 LP co-investment perspectives analysis of current co-investment market practice confirms that no-fee, no-carry co-invest structures remain the most common arrangement when a GP offers co-investment to an existing LP as a relationship benefit.

The LPA or side letter should specify:

• Whether the co-invest vehicle carries a separate management fee (and if so, the rate and basis)
• Whether a promote or carried interest applies to the co-invest allocation
• How the co-invest vehicle's economics interact with the primary deal waterfall

Leaving fee terms undefined creates a situation where the GP assumes standard deal economics apply and the LP assumes co-invest economics apply. That gap surfaces at the worst possible time: when the deal is performing and both parties are paying close attention to distributions.

{{main-cta}}

4. Conflicts-of-Interest Disclosure

When a sponsor manages multiple projects or has relationships with other LPs who also hold co-investment rights, the potential for allocation conflicts is real. The ILPA Principles 3.0 framework identifies conflicts disclosure as a core obligation in co-investment structures, specifically covering how GPs handle situations where demand for a co-invest allocation exceeds available capacity.

The side letter should address:

• Whether the family office's co-investment right is exclusive, preferred, or pari passu with other LPs holding similar rights
• How the GP will allocate co-invest capacity when multiple LPs have rights on the same project
• What the GP's disclosure obligations are when a conflict affects the family office's allocation

Sponsors who have granted co-investment rights to multiple LPs without a defined priority or allocation protocol will face the hardest conversations on their most competitive follow-on deals, precisely when LP relationships matter most.

Exit Governance and Drag-Along Exposure for Co-Investors

Co-investors who participate through a separate vehicle alongside the primary LP structure face a governance question that sponsors often leave unaddressed: what rights does the co-investor hold at exit, and can the GP drag them into a sale they would otherwise oppose?

Two provisions govern this exposure.

Drag-along rights allow a majority of equity holders, or the GP acting on behalf of the fund, to compel minority co-investors to sell their interest on the same terms as the majority. If the co-invest vehicle holds a separate membership interest in the project entity, and the LPA or co-invest agreement includes a drag-along, the family office co-investor can be required to sell even if it prefers to hold.

Tag-along rights give the co-investor the option to participate in a sale on the same terms as the selling party, protecting against a scenario where the GP sells its interest and leaves the co-investor with a minority position and no exit path.

Sponsors should address both provisions explicitly in the co-invest side letter:

• Whether the co-investor is subject to drag-along by the GP or the primary LP
• Whether the co-investor holds tag-along rights if the GP or a majority LP transfers its interest
• How exit timing decisions are made when the co-investor and the GP have different hold-period preferences

For sponsors working through how to calculate the right GP-LP split for your deal, exit governance for co-investors connects directly to waterfall design: if the co-invest vehicle participates in distributions at a different tier than the primary LP, the drag-along mechanics need to account for that difference at the point of sale.

The drafting gap that generates the most friction: a co-invest side letter that grants drag-along rights to the GP without defining the minimum sale price or approval threshold gives the GP broad authority to exit on terms the co-investor may find unfavorable. Family offices with active investment committees will push back on this during diligence. Define the threshold before the relationship is under pressure.

For a parallel view of how information rights and approval rights interact with co-investor governance, the guide on audit rights and information access before signing $10M+ deals covers the same structural tension from the LP's perspective.

Frequently Asked Questions

What is a co-investment right in a real estate LP structure?

A co-investment right gives a family office LP the option to invest additional capital alongside the GP in a follow-on project, separate from its primary commitment. The LP reviews the specific deal and chooses to participate or pass. The right creates no funding obligation and lapses if the LP declines within the defined notice window.

How does a co-investment right differ from a co-investment obligation?

A co-investment right is an option: the LP may participate but has no duty to fund. A co-investment obligation requires the LP to commit capital when the GP calls it, regardless of whether the LP has reviewed or approved that specific deal. Most family offices request rights; obligations are rare and require explicit drafting to be enforceable.

What should the allocation methodology specify in the side letter?

The allocation methodology should state whether the family office's co-invest share is a fixed percentage of project equity, a pro-rata amount based on its initial commitment, or subject to GP discretion with a defined floor. It should also specify whether the right applies to all follow-on projects or only those meeting defined criteria such as asset class or geography.

What notification timeline protects both the GP and the LP?

The GP provides written notice before the co-invest allocation closes with enough lead time for the LP's investment committee to convene. The LP confirms participation within a defined window stated in the side letter, and silence within that window is treated as a pass for that project. This protects GP capital-raise timing while giving the LP adequate review time.

Do family offices expect reduced fees on co-invest vehicles?

Family offices that receive co-investment rights as part of an LP relationship typically expect no management fee and no carried interest on the co-invest vehicle. This reflects standard market practice for relationship-based co-investment, as distinct from third-party co-invest arrangements where fee terms vary. The side letter should state the fee structure explicitly to avoid assumptions on either side.

How do drag-along rights affect a family office co-investor at exit?

If the co-invest side letter includes a drag-along provision, the GP or a majority LP can compel the co-investor to sell its interest on the same terms as the majority, even if the co-investor prefers to hold. Sponsors should define the minimum sale price threshold or approval requirement that triggers drag-along, so the co-investor has a predictable floor rather than open-ended GP discretion.

What drafting gaps create the most friction on follow-on raises?

The most common friction points are: a co-investment right with no defined allocation methodology (so the LP has no calculable expectation), a notification window that is too short for the LP's internal approval process, fee terms left to future negotiation, and no priority protocol when multiple LPs hold co-investment rights on the same project. Each gap becomes a renegotiation point on the next deal.

Continue reading this series:

• Family Offices vs. Private Equity Funds: Which Institutional LP Is Right for Your Development
• Single-Family Office vs. Multi-Family Office for Real Estate LP Equity: Which to Target in 2026
• What Is a Standard GP Promote Structure for a $100M Real Estate Closed-End Fund Targeting Institutional LPs

By the time most founders are rehearsing the pitch, the outcome of the raise has already been set by the structure underneath it. IRC Partners advises operators raising $5M to $250M of institutional capital and accepts seven strategic partners per quarter. If you are going to market this year, have the structure reviewed before investors do. Schedule a call with our team here.