A pre-lien notice is only required on smaller residential projects. It is not required on construction of 5000 square feet or more. Design professionals must file a lien within 120 days of last furnishing services and only if there has been some “actual physical improvement”. An enforcement suit must be filed within one year of the last date services were performed. Liens apply only to private projects not public. M.S.A. §514.01

Whoever performs engineering or land surveying services with respect to real estate, or contributes to the improvement of real estate by performing labor, or furnishing skill, material or machinery for any of the purposes hereinafter stated, whether under contract with the owner of such real estate or at the instance of any agent, trustee, contractor or subcontractor of such owner, shall have a lien upon the improvement, and upon the land on which it is situated or to which it may be removed, that is to say, for the erection, alteration, repair, or removal of any building, fixture, bridge, wharf, fence, or other structure thereon, or for grading, filling in, or excavating the same, or for clearing, grubbing, or first breaking, or for furnishing and placing soil or sod, or for furnishing and planting of trees, shrubs, or plant materials, or for labor performed in placing soil or sod, or for labor performed in planting trees, shrubs, or plant materials, or for digging or repairing any ditch, drain, well, fountain, cistern, reservoir, or vault thereon, or for laying, altering or repairing any sidewalk, curb, gutter, paving, sewer, pipe, or conduit in or upon the same, or in or upon the adjoining half of any highway, street, or alley upon which the same abuts.

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