Section 2 of the Builders Lien Act defines who is entitled to a lien, and the opening words indicate that contractors, subcontractors, and workers, may be entitled to liens:
(1) Subject to this Act, a contractor, subcontractor or worker who, in relation to an improvement,
(a) performs or provides work,
(b) supplies material, or
(c) does any combination of those things referred to in paragraphs (a) and (b)
has a lien for the price of the work and material, to the extent that the price remains unpaid, on all of the following:
(d) the interest of the owner in the improvement;
(e) the improvement itself;
(f) the land in, on or under which the improvement is located;
(g) the material delivered to or placed on the land.
(2) Subsection (1) does not create a lien in favour of a person who performs or provides work or supplies material to an architect, engineer or material supplier.
(Builders Lien Act, s. 2).
The list of lien claimants in the opening words of s. 2 (contractor, subcontractor, worker) is exhaustive i.e. only persons who come within those terms may claim liens. Those terms are considered below.