Encumbrance

n. burden, hindrance, impediment; one who is dependent on another for support (especially a child); (Law) lien or claim on a property (also incumbrance)

An 'encumbrance is a legal term of art for anything that affects or limits the title of a property, such as mortgages, leases, easements, liens, or restrictions. Also, those considered as potentially making the title defeasible are also encumbrances. For example, charging orders, building orders and structure alteration.
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Noun
1. an onerous or difficult concern; "the burden of responsibility"; "that's a load off my mind"
(synonym) burden, load, incumbrance, onus
(hypernym) concern, worry, headache, vexation
(hyponym) dead weight
2. a charge against property (as a lien or mortgage)
(synonym) incumbrance
(hypernym) charge
3. any obstruction that impedes or is burdensome
(synonym) hindrance, hitch, preventive, preventative, incumbrance, interference
(hypernym) obstruction, obstructor, obstructer, impediment, impedimenta
(hyponym) clog

(n.)
That which encumbers; a burden which impedes action, or renders it difficult and laborious; a clog; an impediment. See Incumbrance.
  

(n.)
Same as Incumbrance.
  

Any claim or restriction on a property's title.