Lateral and subjacent support

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Property law
Part of the common law series
Acquisition of property
Gift  · Adverse possession  · Deed
Lost, mislaid, or abandoned
Treasure trove
Alienation  · Bailment  · License
Estates in land
Allodial title  · Fee simple  · Fee tail
Life estate  · Defeasible estate
Future interest  · Concurrent estate
Leasehold estate  · Condominiums
Conveyancing of interests in land
Bona fide purchaser
Torrens title  · Strata title
Estoppel by deed  · Quitclaim deed
Mortgage  · Equitable conversion
Action to quiet title
Limiting control over future use
Restraint on alienation
Rule against perpetuities
Rule in Shelley's Case
Doctrine of worthier title
Nonpossessory interest in land
Easement  · Profit
Covenant running with the land
Equitable servitude
Related topics
Fixtures  · Waste  · Partition
Riparian water rights
Lateral and subjacent support
Assignment  · Nemo dat
Other areas of the common law
Contract law  · Tort law
Wills and trusts
Criminal Law  · Evidence

Lateral and subjacent support, in the law of property, describes the right a landowner has to have that land physically supported in its natural state by both adjoining land and underground structures. If a neighbor's excavation causes the landowners land to cave in, the neighbor will be subject to strict liability in a tort action. The neighbor will also be strictly liable for damage to buildings on the landowner's property if the landowner can show that the weight of the buildings did not contribute to the collapse of the land. If the landowner is unable to make such a showing, the neighbor must be shown to have been negligent for the landowner to recover any damages.

Because the landowner owns everything beneath the ground on his property, he may convey to another party the rights to mineral deposits under the land, and other things requiring excavation. However, such a conveyance requires the recipient to prevent any damage to the surface of the land caused by the excavation, unless the conveyance itself grants express authority for the surface land to be damaged "as reasonably necessary" for the recipient to exercise his extraction rights.