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HomeCivil CodeDiv. 2Pt. 4Ch. 2§ 1030 Mixture Ownership Rights

§ 1030 Mixture Ownership Rights

Civil Code·California
AI Summary·Official Text·Key Terms·Related Statutes·References
AI SummaryVerified

§ 1030 Mixture Ownership Rights

This law explains what happens when people mix their own things together and can't tell whose part is whose, giving the person who didn't agree a way to either separate the items or share ownership based on each person's contribution.

Key Takeaways

  • •If the mixed items can be separated easily, the owner who didn't consent can demand separation.
  • •If separation isn't possible, the owners share the result based on how much and how valuable each person's material was.
  • •If one person's material is much better in both amount and quality, they can keep the whole thing after reimbursing the other owners for their materials.

Example

Two neighbors mix leftover bricks and cement to fix a wall without asking each other, and later one neighbor wants to use the new wall but the other didn't consent to the mix.

The neighbor who didn't agree can ask for the wall to be taken apart if it's easy, or if it can't be separated, they can own the wall together in proportion to how much brick and cement each contributed, or the one with the better materials can keep the whole wall after paying the other for their share.

AI-generated — May contain errors. Not legal advice. Always verify source.

Official Source
View on CA.gov

§ 1030 Mixture Ownership Rights

When a thing has been formed by the admixture of several materials of different owners, and neither can be considered the principal substance, an owner without whose consent the admixture was made may require a separation, if the materials can be separated without inconvenience. If they cannot be thus separated, the owners acquire the thing in common, in proportion to the quantity, quality, and value of their materials; but if the materials of one were far superior to those of the others, both in quantity and value, he may claim the thing on reimbursing to the others the value of their materials. (Enacted 1872.)

Last verified: January 9, 2026

Key Terms

admixtureprincipal substanceseparationquantity, quality, and valuereimbursing

Related Statutes

  • § 1028 Material Ownership Rights
  • § 1025 Ownership Of Combined Property
  • § 1026 Accessory Ownership Rights
  • § 1027 Principal Part Determination
  • § 1029 Joint Ownership Of Materials

References

  • Official text at leginfo.legislature.ca.gov
  • California Legislature. Civil Code. Section 1030.
View Official Source