Who the deadlines apply to
Each North Dakota rule here is listed for any project type. What separates the rules is role and condition.
Most stages name the same five roles: the direct contractor, the subcontractor, the sub-subcontractor, the supplier and the laborer. That holds for the default preliminary notice row, which reads None required [1], for both notice of intent rules, for both lien filing rules and for both rules at the deadline to sue.
One rule is narrower. The seller's notice under § 35-27-21 names direct contractors, subcontractors, sub-subcontractors and suppliers, and leaves laborers out [1].
How the periods run
The seller's notice. This rule carries its own condition. For the seller, when material is furnished for an original, complete, and independent building, structure, or improvement, the rule reads At the time the material is furnished for such improvement [1]. The calculator counts no date for it.
Before the lien is recorded. Section 35-27-02(4) calls for written notice that a lien will be claimed, given At least ten days before the recording of the construction lien [1]. The period counts back from the recording, and the calculator draws no date for it.
Recording the lien. Two default filing rules stand side by side, and each names all five roles. One reads 90 days after all the person's contribution is done [1]. The other, from § 35-27-14, reads 3 years after the first item of material is furnished [1].
Section 35-27-14 also says what follows a filing later than the § 35-27-13 period: the lien is not defeated, except as against good-faith purchasers or encumbrancers for value whose rights accrue before it is filed, and as against the owner to the extent of amounts paid to a contractor before it is recorded [1].
Suing to enforce. The default rule reads 3 years after the lien is recorded [1]. Under § 35-27-25, the lien is not enforceable unless the lienor commences an action and records a lis pendens with the county recorder within that time [1]. If a lis pendens is not recorded within that time, the statute deems the lien satisfied [1].
Before the action, § 35-27-24 adds a notice of intention to enforce. Its rule reads At least ten days before an action to enforce the lien is commenced, by personal service, or at least twenty days before, by registered mail [1]. Because it counts back from the action, no date is drawn.
Upon written demand by or on behalf of the owner, delivered to the lienor and filed with the county recorder, the rule reads Within thirty days after the date of delivery of the demand [1]. If suit is not commenced and filed and a lis pendens recorded within that time, the lien is forfeited [1]. Delivery of the demand is not one of the calculator's inputs, so it shows the wording in place of a date.
Counting the days
Section 1-02-15 leaves out the first day of a period and includes the last [2]. A last day that is a holiday is excluded as well [2], and § 1-03-01 lists every Sunday among the holidays [3]. That rolling reaches every stage on this page.
Section 1-03-01 also names the dated holidays, and §§ 1-03-02 and 1-03-02.1 shift New Year's Day, the fourth of July, Veterans' Day and Christmas Day to the Monday after when one falls on a Sunday, or to the Friday before when one falls on a Saturday [3].
Saturdays are handled apart. When the act is one appointed by law or contract to be performed upon a particular day, § 1-03-05 lets it be performed on the next business day, so a last day on a Saturday may move later [3].