les servitudes sont par exemple un droit de passage, d'accés a une parcelle de terrain avoisinante
granddictionnaire
bonne chance

I entirely agree with the asker. `Easements' is the exact word.

See following bilingual document :
(g) prescribing the things that may be
included in a utility easement for the
purposes of subsection 76(4);

(g) déterminer les inclusions aux servitudes d'utilité publique pour l'application du paragraphe 76(4);

Définition du GDT :

Domaine(s)
droit

easement on real estate
servitude foncière n f

[1981]
BT18988740

OR:
easement
Acquired right to use the land of another person generally to have access to an adjacent property.


servitude n f
Droit acquis d'employer le terrain d'une autre personne, généralement pour avoir accès à une propriété attenante.

[1971]
BT17092265

EXAMPLES:
... easement can have the affect of lowering the value of a landowner s taxable estate. For families who own large tracts of land of significant value, this might ...

OR:
For instance, an easement might be shown on the title. An easement gives permission for part of the property to be used in a particular way by another party such as Main Roads WA, electricity or water utilities, or a neighbour. A common easement gives a neighbour the right to use part of a property to gain access to a road.

Dictionary of Business French, Collin & Laurendeau

in Dunhaim Law Dictionary " From roman Law ,reffering to rights of use over the property of another... an easment is type of servitude as is a 'profit a prendre'.
As a second proposal this third party ..
only existence/state(in sense of circumstance)of Servitude .
These are just proposals for a different perspective.

servitudes covers : properties the owner can get profit from renting or from a right of way and it is also used in more ancient texts and or large older properties such as castles, manors or farms for the attached buildings where they may have put horses or hay, etc ,a and which although they may not currently be in use, they could get a profit from were they allocated to a third party.

I hope my English is still understandable today as I have had a very hard day (and heard only badly spoken English).

So if it is not, please contact me and I'll try to explain it better then.

Could luck with your editing