Prenuptial Agreements and Homes Under Construction: Why Valuation Language Is Critical

One of the most overlooked and most litigated issues in prenuptial agreements involves real property that is not yet complete. Homes under construction present unique legal and financial challenges, particularly when construction begins before marriage but is completed after the wedding or in a case that I know all too well, never completed.

Without clear valuation language in a prenup, what appears straightforward can quickly turn into a costly dispute.

Why Homes Under Construction Are Different

A completed home has an appraised value that can be identified at a specific point in time. A home under construction does not.

During construction, value is fluid. Costs change. Materials fluctuate. Labor delays occur. Design upgrades are added. Financing terms evolve. The property may be partially improved, substantially improved, or nearly complete at the time of marriage.

All of those variables matter under community property law.

Why Value Must Be Defined or Ascertainable

A well-drafted prenup does not just identify who owns the house. It establishes how value will be measured.

Critical questions include:

• What is the value of the property at the time of marriage

• How construction costs are treated

• Whether post-marriage improvements create a community interest

• How appreciation is allocated

• What valuation method applies if the property is completed during the marriage

• What happens if the home is not completed and the marriage ends

If value is not set or clearly ascertainable, expert appraisers, accountants, and construction records will be required to untangle the issue later.

What Happens If the Home Is Completed During the Marriage

This is where many prenups fail.

If construction is completed after the wedding and the agreement does not address valuation, disputes often arise over:

• Whether the increase in value is separate or community

• Whether appreciation is passive or tied to marital effort

• Whether community funds were used to complete construction

• Whether loan payments during marriage created equity claims

These disputes frequently require forensic accounting and competing appraisals. Litigation costs can quickly exceed the amount in controversy.

What Happens If the Home Is NOT Completed During the Marriage

When a marriage ends before a home under construction is completed, the legal and financial complications intensify. Without a clear prenuptial provision, courts or an arbitrator must determine how to allocate unfinished value, construction costs already incurred, loan obligations, and any community funds used during the marriage. Because the property lacks a finished market value, judges often rely on competing expert testimony, construction records, and forensic accounting to estimate partial value and equity. This process is costly, time-consuming, and highly discretionary. In many cases, one spouse may be forced to reimburse the other for community contributions, assume unfinished debt, or sell an incomplete property under unfavorable conditions. A well-drafted prenup can prevent these outcomes by clearly defining ownership, responsibility for ongoing construction costs, and valuation methodology if the project is abandoned or the marriage ends before completion.

How a Prenup Can Prevent These Disputes

A carefully drafted prenuptial agreement can:

• Establish a baseline value at marriage using an appraisal or cost basis

• Define how future construction costs are treated

• Specify whether appreciation remains separate property

• Identify how refinancing or loan payments affect ownership

• Provide a clear valuation method in the event of divorce

This level of planning prevents later arguments about intent and avoids judicial guesswork.

Construction Projects Are Predictable in One Way

They almost always change.

Budgets increase. Timelines shift. Scope expands. Those changes are exactly why prenups must anticipate them rather than ignore them.

Failing to plan for valuation does not preserve simplicity. It guarantees complexity later.

Prenups Are About Precision, Not Assumptions

When real estate is under construction, assumptions are dangerous. Courts will not assume intent. They will apply statutes and formulas that may not reflect what either party expected.

A prenuptial agreement should reduce uncertainty, not create it.

If a home under construction is part of your premarital planning, valuation language is not optional. It is essential.

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If you are engaged and own property under construction or are planning a custom build, we invite you to schedule a complimentary consultation.