Written by attorneys · grounded in primary & secondary sources — see below
2 senses
1
in land use law
A property interest that protects an owner from the application of later-enacted zoning restrictions to an existing or permitted use. The interest arises either from a use lawful when begun or from substantial good-faith expenditures made in reliance on a permit or prior zoning. Once vested, the interest prevents immediate termination or revocation and may be lost only by abandonment, statutory discontinuance, or a reasonable amortization period.
2
in conflict of laws
A right created by the law of the place where the operative act or event occurred. Under the traditional territorial approach, that right is treated as fixed and enforceable in every forum, so the forum applies the substantive law of the place of vesting rather than its own rules.
Each sense below has its own examples, sources, and questions.
Sense 1
1
in land use law
A property interest that protects an owner from the application of later-enacted zoning restrictions to an existing or permitted use. The interest arises either from a use lawful when begun or from substantial good-faith expenditures made in reliance on a permit or prior zoning. Once vested, the interest prevents immediate termination or revocation and may be lost only by abandonment, statutory discontinuance, or a reasonable amortization period.
Sources & Authorities· 2 primary sources
Select any source to read its text and confirm it supports the definition.
Common Law
Examples3
Nonconforming Quarry Operation
Valerie Voss purchased land in 2015 and immediately opened a gravel quarry that complied with then-existing county rules. In 2022 the county rezoned the area residential and ordered all quarries to close. Because the quarry was a lawful nonconforming use, Valerie retains the right to continue operations despite the new zoning.
Permit-Based Apartment Project
Venture Holdings obtained a valid building permit for a multi-family complex under existing zoning and spent $1.2 million on foundations and utilities before the city downzoned the parcel to single-family. The substantial expenditures made in reliance on the permit give Venture a vested right to finish the project under the prior rules.
Training Program Expansion
Valdez Steel received a permit to build an on-site training facility under then-current industrial zoning and poured concrete footings before the city changed the rules. The expenditures create a vested right to complete the facility despite the rezoning.
Frequently Asked3
How does a landowner acquire a vested right to finish a project after zoning changes?+
A landowner acquires the right by obtaining a valid permit and making substantial good-faith expenditures or other detrimental changes in position before the zoning change. Courts then balance the owner's reliance against the public interest. Some jurisdictions require actual construction while others use a broader equitable test.
Supporting sources
When may a municipality force termination of a nonconforming use through amortization?+
A municipality may require termination after a reasonable period that accounts for the nature of the use, the owner's investment, and the time needed to recoup that investment. The period must be long enough to avoid an inequitable loss of the vested right.
Supporting sources
Sense 2
2
in conflict of laws
A right created by the law of the place where the operative act or event occurred. Under the traditional territorial approach, that right is treated as fixed and enforceable in every forum, so the forum applies the substantive law of the place of vesting rather than its own rules.
Sources & Authorities· 2 sources
Select any source to read its text and confirm it supports the definition.
Course Outlines
Study Supplements
Examples3
Will Contest Across States
Vivian Velez executed a will in State X that was valid under X law at the time of execution. After her death a probate court in State Y applies State X law to determine validity because the right to make the will vested in X when the document was signed.
Calder v. Bull3 Dall. (3 U.S.) 386 (1798)
Mortgage Moratorium Challenge
Vista Manufacturing held a mortgage note executed in State A. When State B later enacted a temporary foreclosure moratorium, the court applied State A law because the contractual right had already vested in A at the time the note was signed.
Frequently Asked2
How does the traditional vested-rights theory determine which state's law applies in a tort case?+
The theory locates the place where the last event necessary to create the cause of action occurred. The law of that place governs because the right is treated as having vested there.
Supporting sources
Why did modern conflicts scholars reject the vested-rights approach?+
Critics argued that the approach mechanically selected law based on fortuitous location rather than state interests and produced arbitrary results when events spanned multiple states.
What happens to a vested right when the owner abandons the use?+
Abandonment or discontinuance for the statutory period extinguishes the vested right, allowing the municipality to enforce the new zoning immediately.
Supporting sources
Home Building & Loan Association v. Blaisdell290 U.S. 398, 54 S.Ct. 231, 78 L.Ed. 413 (1934)
Judgment Reopening Dispute
Vincent Valdez obtained a final federal judgment in 1993. Years later Congress passed a statute allowing certain dismissed claims to be reopened. The court held that the vested right embodied in the 1993 judgment could not be disturbed by the later statute.
Plaut v. Spendthrift Farm, Inc.514 U.S. 211, 228 (1995)
not to be sued in California. Cf. Bernheimer v. Converse , 206 U. S. 516; National Surety Co. v. Architectural Decorating Co. , 226 U. S. 276; Funkhouser v. J. B. Preston Co. , 290 U. S.…
at the will of state legislatures. It is not to be presumed legislatures will divest citizens of
vested rights
except for the benefit of the community and with just…
to the application of the law of their former residence unless it could be demonstrated that they had governed their conduct in reliance upon it ( Griffith v. United Air Lines , supra ) —…
Professional ResponsibilityJudicial conduct · DisqualificationMPREFoundational