Quinn J. in Higgins v. Higgins sets out the factors to consider for an award of occupation rent:
(a) the conduct of the non-occupying spouse, including the failure to pay support;
(b) the conduct of the occupying spouse, including the failure to pay support;
(c) delay in making the claim;
(d) the extent to which the non-occupying spouse has been prevented from having access to his or her equity in the home;
(e) whether the non-occupying spouse moved for the sale of the home and, if not, why not;
(f) whether the occupying spouse paid the mortgage and other carrying charges of the home;
(g) whether children resided with the occupying spouse and, if so, whether the non-occupying spouse paid, or was able to pay, child support;
(h) whether the occupying spouse has increased the selling value of the property;
(i) ouster is not required, as once was thought in some early decisions.
http://www.canlii.org/en/on/onsc/doc/2001/2001canlii28223/2001canlii28223.html