Easement by Implication and Necessity: Two Doctrines People Constantly Confuse
Not every easement is written into a deed. When a single tract of California land gets divided into separate parcels, the law sometimes implies an easement — a right to cross one parcel to benefit another — even though nobody ever signed a document creating one. Two doctrines do this work: easement by implication and easement by necessity. They look similar, get tested together constantly, and hinge on one key variable: how much necessity is required.
Getting this distinction right matters well beyond exam day — it’s central to real disputes over landlocked lots, subdivided family land, and driveway access across California.
What Is an Easement by Implication or Necessity?
An easement by implication arises when land under common ownership is severed and a prior, apparent, continuous use reasonably necessary to the property continues after the split. An easement by necessity arises when severed land becomes landlocked, requiring strict necessity for access to a public road — with no prior use required at all.
Comparing the Two Doctrines Side by Side
| Requirement | Easement by Implication | Easement by Necessity |
|---|---|---|
| Common ownership before severance | Required | Required |
| Prior apparent, continuous use | Required | Not required |
| Degree of necessity | Reasonable necessity | Strict (absolute) necessity |
| Typical fact pattern | Driveway or utility line already in use | Landlocked parcel with no road access |
| Timing of necessity | At time of the dispute | At the time of severance |
The distinguishing factor is really this trade-off: implication demands a visible prior use but only reasonable necessity; necessity demands no prior use at all, but only if access is genuinely, strictly cut off.
Easement by Implication: The Driveway Example
If a house has always been served by a driveway that crosses what later becomes a neighboring lot, and the use was open and continuous before the two lots were split, courts will often imply an easement in favor of the house — because the parties who split the property likely assumed the driveway would keep working the same way. They just never wrote it down.
Easement by Necessity: The Landlocked Parcel
Easement by necessity doesn’t care whether any path or use previously existed. If severing a tract leaves one piece with no way to reach a public road except by crossing the other piece, courts will imply an access easement across the retained land — because no owner should end up completely cut off from the public street as a result of how a single owner chose to subdivide.
Neither Doctrine Requires a Writing
Because both doctrines arise by operation of law at the moment of severance, they bypass the Statute of Frauds entirely — no deed, no signed writing, is required to create either type of easement. Contrast this with an oral agreement to grant a normal easement, which fails the Statute of Frauds and is treated only as a revocable license.
When These Easements Disappear
Easements by implication and necessity share a fragile trait: they terminate automatically once the underlying necessity ends — for example, if a new public road is later built giving the landlocked parcel direct access. This is very different from an express easement in a recorded deed, which survives regardless of whether the original justification still exists. Anyone relying on a necessity-based easement should treat it as conditional, not permanent — see our companion piece on easement termination methods for the full list of ways an easement can end.
Worked Example: Comparing Both Doctrines on One Set of Facts
Homeowner Elena owns a single large parcel in Sonoma County that includes a main house served by a gravel driveway crossing what she plans to sell as a separate back lot. She sells the back lot to Kevin, keeping the front lot (with the house) for herself.
Question 1 — Does Elena get an easement over Kevin’s new lot for the driveway? Likely yes, under easement by implication: the driveway was an apparent, continuous use before severance, and it’s reasonably necessary for Elena to keep using her house the way she always has.
Question 2 — Suppose instead Elena had sold her interior lot (with no driveway or road ever built on it) to Kevin, keeping the outer lot that touches the public street. If Kevin’s new interior lot has no way to reach the public road except across Elena’s retained land, Kevin gets an easement by necessity — even though no path ever existed before, because Kevin’s parcel is now landlocked as a direct result of the severance.
Common Mistakes to Avoid
- Confusing the necessity thresholds: implication needs only reasonable necessity (but requires prior use); necessity needs strict necessity (but needs no prior use).
- Assuming these easements need to be recorded to be valid. They arise by operation of law.
- Believing mere convenience — a shortcut that isn’t the only way in or out — satisfies either doctrine. It doesn’t.
FAQ
What’s the main difference between an easement by implication and an easement by necessity?
Easement by implication requires a prior, apparent, continuous use plus reasonable necessity. Easement by necessity requires no prior use at all, but demands strict necessity — the parcel must be truly landlocked.
Do easements by implication or necessity need to be in writing?
No. Both arise automatically by operation of law when a commonly owned tract is severed, bypassing the Statute of Frauds entirely.
Does an easement by necessity last forever?
No. It terminates automatically once the necessity ends, such as when a new public road provides direct access to the previously landlocked parcel — unless it was also backed by an express grant.
Key Takeaways
- Both doctrines require prior common ownership of the land before it was severed into separate parcels.
- Easement by implication needs a prior apparent, continuous use plus only reasonable necessity.
- Easement by necessity needs no prior use but requires strict (absolute) necessity — a truly landlocked parcel.
- Neither doctrine requires a writing; both arise automatically at severance.
- Necessity-based easements can terminate automatically once the underlying necessity disappears.
This article is educational and is not legal advice. Consult a licensed California attorney about your situation.