Accession

Concept and Coverage of Accession

Accession is the right of the owner of a thing to everything that the thing produces, and to everything incorporated or attached to it, either naturally or artificially.

The doctrine rests on the idea that ownership is not confined to the original substance of the property; it extends to its fruits, improvements, additions, and incorporations, subject to indemnity, good faith, public dominion, and special rules on movables and immovables.

Accession is generally a consequence of ownership, not an independent mode of acquiring ownership, because the owner acquires the addition by reason of an existing ownership over the principal thing.

When two things belonging to different owners are joined, the law usually identifies the principal thing, allows its owner to acquire the accessory, and protects the other owner through indemnity unless bad faith changes the result.

The governing maxim for immovables is that what is built, planted, or sown on land belongs to the landowner, but this maxim is applied through detailed rules that distinguish good faith, bad faith, materials, and the landowner's statutory options.

Principal Classifications

Fruits as Accession Discreta

Fruits are things produced by property without destroying or substantially diminishing the substance of the principal thing.

The Civil Code classifies fruits into natural fruits, industrial fruits, and civil fruits, and the classification matters because the moment of accrual and the rights of possessors may differ.

Natural and industrial fruits are generally considered existing when they are manifest or born, but ownership or entitlement may still depend on possession, contract, usufruct, lease, or the time of gathering.

Civil fruits are deemed to accrue daily, which means they are apportioned by time when a change in ownership, possession, usufruct, or entitlement occurs.

The owner is entitled to the fruits of the property, but this entitlement yields to a possessor in good faith, a usufructuary, a lessee, an antichretic creditor, or another person with a juridical right to receive them.

A possessor in good faith keeps the fruits already received before possession is legally interrupted; after interruption, the possessor is treated according to the rules on expenses, fruits, and reimbursement.

A possessor in bad faith must reimburse the fruits received and the fruits the lawful possessor could have received, because bad faith prevents the possessor from profiting from possession.

Fruits pending at the time possession ends are handled by allocating expenses and benefits according to the Civil Code rules on possession, because the person who advanced cultivation costs may be entitled to reimbursement even if ownership of the fruits belongs to another.

Hidden Treasure and Finds Connected with Ownership

Hidden treasure is any unknown deposit of money, jewelry, or other precious objects whose lawful ownership does not appear.

As a rule, hidden treasure belongs to the owner of the land, building, or other property where it is found, because ownership carries certain benefits arising from the thing owned.

If the discovery is made by chance on another's property, one half belongs to the finder, provided the finder is not a trespasser and the discovery is not the result of a search made without right.

If the find is of interest to science or the arts, the State may acquire it upon payment of just price, reflecting the public interest in cultural, historical, or scientific objects.

The rule on hidden treasure does not protect a person who entered the property unlawfully, because the law does not reward a discovery made through trespass or bad faith.

Accession to Immovable Property by Building, Planting, or Sowing

The land is ordinarily treated as the principal thing, and buildings, plantings, and sowings are treated as accessories to the land.

Works, sowing, and planting are presumed made by the landowner and at the landowner's expense, unless the contrary is proved.

The presumption favors stability of land ownership, but it does not defeat proof that another person built, planted, or sowed on the land, or that another person supplied the materials, plants, or seeds.

The consequences depend mainly on three factors: ownership of the land, ownership of the materials, and good faith or bad faith of the persons involved.

Landowner Uses Materials Belonging to Another

If the landowner builds, plants, or sows on the land using materials, plants, or seeds of another in good faith, the landowner acquires the improvement but must pay the value of the materials, plants, or seeds.

The owner of the materials may remove them only if removal can be done without injury to the work constructed or without destruction of the plantings, sowings, or land.

If the landowner acted in bad faith, the landowner must pay the value of the materials and damages, because bad faith converts accession from a neutral consequence of ownership into a source of liability.

Builder, Planter, or Sower in Good Faith on Another's Land

Article 448 governs the classic situation where a person builds, plants, or sows in good faith on land owned by another.

Good faith means the builder, planter, or sower honestly believes that the land belongs to him or that he has a title sufficient to justify the construction, planting, or sowing.

Good faith must exist at the time of building, planting, or sowing, and it ceases when the person learns of the defect in title or when legal interruption makes continued possession inequitable.

The rule does not ordinarily apply to a lessee, usufructuary, agent, contractor, or other person who knows from the start that another owns the land and whose rights are governed by contract, law, or the terms of the juridical relation.

Under Article 448, the landowner has the choice either to appropriate the improvement after payment of indemnity, or to compel the builder or planter to pay the price of the land and the sower to pay the proper rent.

The option belongs to the landowner because the land is the principal thing, but the landowner must choose a lawful option and cannot retain the improvement without paying the required indemnity.

If the landowner chooses appropriation, the builder, planter, or sower in good faith is entitled to indemnity for necessary and useful expenses, and may have a right of retention until payment.

If the landowner chooses compulsory sale, the builder or planter must pay the price of the land, but the builder or planter cannot be compelled to buy when the value of the land is considerably more than the value of the building or trees.

When the land value is considerably more, the relationship may be converted into a lease on reasonable terms if the landowner does not appropriate the improvement.

If the parties cannot agree on the terms of the lease, the court may fix the terms, because the statutory balance cannot be defeated by refusal to agree on rent.

For sowing, the landowner may require payment of the proper rent rather than a sale of the land, because sowing does not normally create a permanent improvement comparable to a building or trees.

The builder in good faith has no right to compel the landowner to sell the land, and the landowner has no right to demand demolition while still treating the builder as in good faith under Article 448.

The landowner's choice is significant because the value to be paid, the right of retention, the obligation to vacate, and the continued use of the land depend on the option selected.

Builder, Planter, or Sower in Bad Faith

A builder, planter, or sower in bad faith is one who knows that the land belongs to another and nevertheless builds, plants, or sows without right.

The builder, planter, or sower in bad faith loses what is built, planted, or sown without right to indemnity.

The landowner may appropriate the improvement without paying indemnity, or may demand demolition or removal at the expense of the builder or planter in bad faith.

The landowner may also compel the builder or planter in bad faith to pay the price of the land, and may compel the sower in bad faith to pay the proper rent.

The builder, planter, or sower in bad faith is liable for damages, because the law treats the act as an invasion of another's ownership rather than a mistaken improvement of property.

Bad Faith of Both Landowner and Builder

If both the landowner and the builder, planter, or sower acted in bad faith, their rights are treated as if both acted in good faith.

This rule prevents the landowner from profiting from silent acquiescence while another improves the land with the landowner's knowledge and without opposition.

The landowner is in bad faith when the improvement is made with the landowner's knowledge and without opposition, because silence in the face of known encroachment may be inequitable.

When both are in bad faith, the law neutralizes the bad faith between them, but liability to innocent third persons, such as a material owner in good faith, may still remain.

Landowner in Bad Faith and Builder in Good Faith

If the landowner is in bad faith and the builder, planter, or sower is in good faith, the law favors the builder, planter, or sower and imposes consequences against the landowner.

The landowner must generally pay the value of the improvement and damages, and the builder, planter, or sower in good faith should not be made to suffer from the landowner's inequitable conduct.

The rule is consistent with the broader principle that accession protects ownership but does not license an owner to appropriate another's labor or materials through bad faith.

Materials, Plants, or Seeds Belonging to a Third Person

When the materials, plants, or seeds belong to a third person who acted in good faith, the person who used them is primarily liable for their value.

The landowner may be subsidiarily liable if the person who used them has no property with which to pay, because the landowner may have benefited from their incorporation into the land.

Subsidiary liability generally does not arise when the landowner chooses removal or demolition instead of appropriation, because the landowner does not retain the benefit of the materials.

A material owner in bad faith may lose the right to indemnity and may be liable for damages, especially when the materials were supplied or allowed to be used despite knowledge of the defect.

Good Faith, Bad Faith, and Right of Retention

Good faith in accession is a state of honest belief, based on circumstances, that the possessor or improver has a right to act as owner or to make the improvement.

Bad faith exists when the person knows the defect in title or the absence of authority, or when circumstances are so clear that continued action would be legally dishonest.

Good faith is always fact-sensitive, but the existence of a contract recognizing another's ownership usually defeats a claim that the builder believed himself to be the owner.

The right of retention protects a possessor or builder in good faith by allowing continued possession until lawful indemnity is paid.

Retention is not ownership; it is a security-like right that prevents unjust enrichment while the indemnity remains unpaid.

During lawful retention, the landowner's ability to recover possession may be suspended, but the retaining party cannot expand the improvement, commit waste, or act as absolute owner beyond the basis of the retention.

Necessary expenses preserve the thing and are generally reimbursable because the owner would have had to incur them to prevent loss or deterioration.

Useful expenses increase the value or productivity of the thing and are generally reimbursable to a possessor in good faith when the owner appropriates the improvement.

Luxurious or ornamental expenses are treated more narrowly; the owner may retain the ornament by paying its value, but if the owner does not retain it, the possessor may remove it if removal causes no injury to the principal thing.

Natural Accession Involving Waters and Riparian Lands

Natural accession involving waters is governed by special rules because flowing water, river beds, shores, and islands may involve public dominion as well as private ownership.

The law distinguishes gradual deposits, sudden transfers, abandoned beds, new river courses, divided currents, and islands.

Alluvion

Alluvion is the gradual and imperceptible deposit of soil on land adjoining the banks of rivers as a result of the current.

The owner of the riparian land becomes the owner of the alluvial deposit because the addition is gradual, natural, and attached to the property.

The essential requisites are a river current, a gradual and imperceptible deposit, and land adjoining the river bank.

The rule on alluvion does not apply in the same way to the seashore, foreshore, or lands of public dominion, because private ownership cannot be acquired over property reserved by law for public use or public service.

Accretions may arise automatically by operation of law, but registration or recognition in land records may still be necessary to reflect the expanded area against third persons.

Avulsion

Avulsion is the sudden transfer of a known and identifiable portion of land from one estate to another by the force of a river current.

The original owner retains ownership of the portion carried away if it can be identified and is removed within the period fixed by law.

The distinction between alluvion and avulsion turns on gradualness and identifiability: alluvion is slow and imperceptible, while avulsion is sudden and the detached portion remains identifiable.

Trees uprooted and carried away by the current belong to their original owner if claimed within the legal period, but the claimant must reimburse necessary expenses incurred in gathering or preserving them.

Change of River Course and Abandoned Beds

When a river naturally abandons its bed and opens a new course, the abandoned bed may belong to the owners whose lands are occupied by the new course, in proportion to the area lost.

The rule compensates owners whose private lands have been taken over by the new river bed, while recognizing that the new bed becomes affected by the character of the river.

Owners of lands adjoining the abandoned bed may have a preferential right to acquire it by paying its value, subject to the statutory limit tied to the value of the land occupied by the new course.

When a river opens a new bed through a private estate by natural causes, the new bed becomes property of public dominion, because the bed follows the public character of the river.

If the new bed later becomes dry through another natural change, the consequences depend on the specific Civil Code rules and the relation between the old bed, the new bed, and the lands affected.

Division of River Current

When a river divides into branches and isolates a piece of land or part of an estate, the owner retains ownership of the isolated portion.

The owner also retains ownership when a portion of land is separated by the current but remains identifiable as part of the original estate.

This rule differs from island formation because the land is not newly created by deposit; it is pre-existing land separated or surrounded by the current.

Islands

Islands formed on seas within Philippine jurisdiction, on lakes, or on navigable or floatable rivers generally belong to the State.

Islands formed by successive accumulation of deposits in non-navigable and non-floatable rivers belong to the owners of the nearest margins or banks.

If the island is in the middle of a non-navigable and non-floatable river, it is divided longitudinally between the owners of the two margins.

If the island is nearer one margin, the owner of that margin owns the island, because the law treats proximity as the basis for accession in that limited setting.

Accession Involving Movable Property

Accession involving movables applies when materials or objects belonging to different owners are joined, mixed, or transformed.

The law uses three main categories: adjunction or conjunction, mixture or confusion, and specification.

The controlling questions are whether the things can be separated without injury, which thing is principal, whether co-ownership is more equitable, and whether any party acted in bad faith.

Adjunction or Conjunction

Adjunction occurs when two movable things belonging to different owners are united in such a way that they form a single object, but each component remains distinguishable.

If separation can be made without injury, each owner may demand separation and recover the thing belonging to him.

If separation cannot be made without injury, the owner of the principal thing acquires the accessory, subject to indemnity to the owner of the accessory.

The principal thing is generally the one to which the other has been united for use, ornament, or perfection.

If that test does not determine the principal thing, the thing of greater value is treated as principal; if the values are equal, the thing of greater volume is treated as principal.

In works such as writing, painting, sculpture, engraving, lithography, and similar works, the intellectual or artistic work is generally treated as principal over the paper, canvas, stone, metal, or other material support.

If the accessory is much more precious than the principal and was united without bad faith, the owner of the accessory may demand separation even if the principal suffers injury.

If the owner of the accessory acted in bad faith, the owner loses the accessory and must indemnify the owner of the principal thing for damages.

If the owner of the principal thing acted in bad faith, the owner of the accessory may demand payment of the accessory's value or separation even if the principal thing is destroyed, with damages in either case.

If both acted in bad faith, their rights are treated as if both acted in good faith, because mutual bad faith cancels the special advantage that either might otherwise claim.

Mixture and Confusion

Mixture occurs when solids belonging to different owners are combined, while confusion occurs when liquids belonging to different owners are blended.

If the materials can be separated without injury, each owner may recover what belongs to him.

If separation is impossible or would cause injury, and the mixture occurred by agreement or by chance, the owners become co-owners in proportion to the value of their respective materials.

If only one owner caused the mixture in good faith, co-ownership may still arise according to the respective values, because good faith prevents forfeiture.

If the mixture was caused in bad faith, the party in bad faith loses the material belonging to him and must pay damages to the innocent owner.

The proportional co-ownership rule is practical because mixed grain, metals, oil, fuel, or other fungible materials may lose separate identity even though their values can be measured.

Specification

Specification occurs when a person uses material belonging to another to create a new work or object of a different kind.

If the maker acted in good faith, the maker generally appropriates the new thing but must indemnify the owner of the material.

If the material is more precious or more valuable than the work, the owner of the material may appropriate the new thing after paying the value of the work, or may demand indemnity for the material.

If the maker acted in bad faith, the owner of the material may appropriate the work without paying the maker, or may demand indemnity for the material and damages.

Specification gives weight to labor and transformation, but it protects the owner of valuable material from losing a disproportionate asset through another's act.

Accession, Co-Ownership, and Public Dominion

Accession does not always result in sole ownership by one person; in mixture, certain island formations, and some boundary-related situations, the result may be co-ownership or proportional ownership.

When the property involved is of public dominion, accession cannot be used to privatize what the law keeps outside private commerce.

Foreshore land, navigable waters, river beds of public rivers, and islands reserved to the State are governed by public law limitations even when natural forces create apparent additions beside private land.

A Torrens title does not convert public dominion property into private land merely because an adjoining registered owner claims an accession, and registration cannot validate ownership that the law does not allow.

Conversely, a lawful private accretion may belong to the riparian owner even before registration, but registration may be needed to bind third persons and update the technical description of the land.

Operational Rules to Remember

• Accession follows ownership of the principal thing, but the accessory owner may be protected by indemnity, separation, retention, co-ownership, or damages.
• For immovables, the land is normally principal, and the landowner's rights are strongest when the builder, planter, or sower acted in bad faith.
• Article 448 protects a builder, planter, or sower in good faith, but it gives the statutory option to the landowner.
• The builder in good faith may retain possession until indemnity is paid when the landowner appropriates the improvement.
• A builder who knows another owns the land usually cannot invoke good faith merely because the improvement was useful or expensive.
• Bad faith generally produces forfeiture, damages, or loss of indemnity, but mutual bad faith may cause the parties to be treated as if both were in good faith.
• Alluvion is gradual and belongs to the riparian owner of land adjoining a river; avulsion is sudden and may preserve ownership in the original owner if legal requirements are met.
• Islands in seas, lakes, and navigable or floatable rivers belong to the State, while islands in non-navigable and non-floatable rivers may belong to private riparian owners under the Civil Code rules.
• In movables, separability is the first question; if separation is not feasible, the law identifies the principal thing, creates co-ownership, or awards the new thing depending on adjunction, mixture, or specification.
• Accession cannot override public dominion, contractual relations, or statutory rights of possessors, usufructuaries, lessees, and other lawful holders.