South Dakota mechanics’ lien and bond deadlines
Work on Private Property
South Dakota lien deadline
Based on the general 120-day period from last furnishing. Exceptions apply — treat this as a planning estimate, not legal advice.
Filing deadline
Lien Statement filed with the Register of Deeds of the county holding the property (Secretary of State for railway/utility-line work) within 120 consecutive calendar days (deliberately not 'four months') of the claimant's last labor or materials meeting the contract requirements - replacement items, periodic testing and service calls do not count. An owner's demand for an itemized verified lien account (available within 15 days after contract completion) pauses enforcement until 10 days after the account is furnished.
Notice prerequisites
No universal pre-work notice. But if the owner, the owner's agent or a contractor hired directly by the owner recorded a Notice of Project Commencement within 30 days after work began and posted a Location Notice at the site, then sub-subcontractors and suppliers-to-subcontractors must send a Notice of Furnishing Labor or Materials by certified/registered mail to the identified contractor (copy to the record owner) no later than 60 days after their last furnishing, attaching the mailing receipt to the eventual lien - otherwise they have no lien. A claimant may also record a Notice of Lien for Improvements/Notice of Contract before visible work begins to beat a later mortgage.
Service on the owner
Before you file the lien statement, mail a copy of it to the property owner at the owner's last known address by registered or certified mail. Attach the post office mailing receipt to the lien statement when you file it with the register of deeds (SDCL 44-9-17). Sub-subcontractors and suppliers to subcontractors on projects with a recorded Notice of Project Commencement must also send the 60-day notice of furnishing described above.
Enforcement
Suit in the circuit court of the property's county 'perfects' the lien and must be brought within 6 years of the last item in the lien statement - unusually long. But an owner's written Notice to Commence Suit shortens it to 30 days, on pain of forfeiture (the register of deeds cancels the lien on the owner's affidavit filed from day 40). No lis pendens requirement mentioned.
SDCL ch. 44-9 (esp. sec. 44-9-1, -6, -7, -8, -13, -14, -15, -23 to -26, -50 to -53); ch. 44-9A (waivers); SDCL 5-22 (public work)
SDCL ch. 44-9 — Mechanics’ and Materialmen’s Liens — published by the South Dakota Legislature.
Work on Public Property
No mechanics lien attaches to public property in any state. On a government job the remedy is the prime contractor’s payment bond, and it runs on its own act with its own deadlines — not the lien deadlines above.
- Who — Nobody — South Dakota prescribes no claim notice.
- When — There is no notice clock.
- How — Not applicable.
- If late — Nothing is lost, because nothing is owed.
- Sue by — A WINDOW: no sooner than 6 months after final settlement, no later than 1 year. SDCL 5-21-6.
Is there a bond at all?
None on the face of the bonding statute - the bond is required on every qualifying contract regardless of size, and it is a SINGLE combined instrument, not separate performance and payment bonds. SDCL 5-21-1: 'Except as provided in § 31-12-15, when any contract is entered into for the construction of public improvement or the furnishing of any material or labor therefor, the contractor is required, before commencing such work, to furnish surety in an amount not less than the contract price, for the faithful performance of the contract, WITH THE ADDITIONAL OBLIGATION that the contractor shall promptly pay all persons supplying him with labor or material in the prosecution of the work provided for in the contract.' The payment protection is an 'additional obligation' riding on the performance bond, which is why waiving the performance security waives the payment protection with it. SDCL 5-21-1.1: 'The requirement of a performance security may be waived by a public corporation if the bid submitted does not exceed the limit established pursuant to § 5-18A-14 for a public improvement.' That limit is the advertising threshold in SDCL 5-18A-14: 'If the purchasing agency intends to enter into a contract for any public improvement that involves the expenditure of one hundred thousand dollars or more ... the purchasing agency shall advertise for bids or proposals.' So on a bid of $100,000 or less the public corporation may waive the bond entirely, and there is then nothing to claim against.
Who can claim on it
The statute names only persons who supplied THE CONTRACTOR. SDCL 5-21-1 obliges the contractor to 'promptly pay all persons supplying HIM with labor or material in the prosecution of the work'. SDCL 5-21-5 speaks of 'Any person who has furnished labor or material used in the construction of any such public improvement as described in § 5-21-1'. SDCL 5-21-6 speaks of 'the person supplying THE CONTRACTOR with labor or material'. There is no language anywhere in chapter 5-21 extending the bond to persons who supplied a subcontractor, and no tier vocabulary at all - the chapter was written before the tier problem was invented. § 5-21-5's broader phrase ('furnished labor or material USED IN the construction') and § 5-21-6's narrower phrase ('supplying THE CONTRACTOR') are in tension, and the point is unresolved on the face of the statutes.
What notice you owe
NOBODY. Chapter 5-21 prescribes no pre-suit notice of claim, of furnishing, or of intent, from any claimant at any tier. What it prescribes instead is an APPLICATION step that is a condition of getting into court at all: under SDCL 5-21-6 the claimant must 'upon application therefor and furnishing affidavit to the corporation that labor or material for the prosecution of such work has been supplied by him and payment for the same has not been made, be furnished with a certified copy of such contract and surety, UPON WHICH he shall have a right of action'. The right of action is expressed as attaching to the certified copy the claimant obtains from the public corporation.
Who it goes to
No notice recipient is prescribed. The affidavit and application under SDCL 5-21-6 go to 'the corporation' - the public corporation that let the contract. Separately, SDCL 5-21-8 puts a publication burden on whoever sues: 'In all suits instituted under the provisions of §§ 5-21-5 and 5-21-6, personal notice of the pendency of such suit, informing them of their right to intervene, as the court may order, shall be given to all known creditors, and in addition thereto notice shall be given by publication in some newspaper of general circulation, published in the county where the contract is being performed once each week for at least two successive weeks with the first publication to be made at least three months before the time limited therefor.'
How it must be served
None prescribed for any claimant's notice, because none is required. For the SDCL 5-21-6 prerequisite the only prescribed formality is an 'affidavit to the corporation' - sworn, delivered to the public corporation. For the SDCL 5-21-8 creditor notice the methods are personal notice 'as the court may order' plus newspaper publication once each week for at least two successive weeks, first publication at least three months before the time limited.
What it has to say
No contents prescribed for a notice of claim, because there is no notice of claim. The SDCL 5-21-6 affidavit must state 'that labor or material for the prosecution of such work has been supplied by him and payment for the same has not been made' - two facts, nothing more.
If the notice is late, or never given
Nothing is lost by failing to give a notice, because none is owed. The corresponding risk sits entirely in the suit window and in the SDCL 5-21-6 prerequisites: a claimant who sues without first applying for and obtaining the certified copy of the contract and surety, or who sues in its own name rather than in the name of the public corporation, or who sues in the wrong county, has not brought the action the statute authorizes.
The small-claim floor
No floor on the size of a claim. The only dollar figure is the waiver threshold: SDCL 5-21-1.1 permits waiver of the performance security - and with it the payment obligation that rides on it - where 'the bid submitted does not exceed the limit established pursuant to § 5-18A-14', which is $100,000 for a public improvement. SDCL 5-21-1.3 additionally permits waiver for emergency procurement (heading only; text not read).
When the suit clock starts
Complete performance of the contract AND final settlement of it - an owner-side event, not the claimant's last day of work. SDCL 5-21-6: '...where suit is instituted by any such person on the surety of the contractor, it shall not be commenced until six months after the complete performance of such contract and final settlement thereof but must be commenced within one year thereafter.' The chapter also gives the public corporation the first move: the claimant's route under SDCL 5-21-6 opens only 'If no suit should be brought by the public corporation within six months from the completion and final settlement of such contract'. A separate clock governs intervention by later claimants: 'any person may file his claim in such action and be made a party thereto WITHIN ONE YEAR FROM THE COMPLETION OF THE WORK under such contract, and not later.'
How long you have to sue
A window, not a deadline: no earlier than six (6) months after complete performance and final settlement, and no later than one (1) year after that same point - roughly a six-month window that opens six months after the job closes out. Intervention in an existing action is cut off one year from completion of the work 'and not later'.
Where suit is brought
Fixed, exclusive, and in the public body's name. SDCL 5-21-6: the claimant 'shall be authorized to bring suit IN THE NAME OF THE PUBLIC CORPORATION in the circuit court for the county in which such contract was to be performed AND NOT ELSEWHERE, for his use and benefit, against such contractor and his surety, and to prosecute the same to final judgment; ... provided, further, that where suit is so instituted by any such person, ONLY ONE ACTION SHALL BE BROUGHT, and any person may file his claim in such action and be made a party thereto within one year from the completion of the work under such contract, and not later; and provided, further, that costs shall not be taxed in such suit against the public corporation.' So: circuit court, county of performance only, caption in the name of the public corporation, one action for all claimants, no costs against the public corporation.
The trap
A South Dakota claimant who sues too EARLY loses: no action may be commenced until six months after complete performance and final settlement of the prime contract, and it must then be brought within one year of that point, in the name of the public corporation, in the circuit court of the county where the contract was to be performed 'and not elsewhere' - and because 'only one action shall be brought', a claimant who misses the one-year intervention cut-off has nowhere else to go.
The act itself
No popular name. SDCL chapter 5-21, 'Bonds of Public Contractors' - a 1907 statute (SL 1907, ch 138) drafted on the pre-Miller-Act Heard Act model. It is NOT a Little Miller Act in structure: there is no notice of claim, no privity/non-privity split, the claimant does not sue in its own name, and the suit window opens LATE and shuts fast.
Where this comes from
SDCL 5-21-1 (surety bond required; obligation of prompt payment), 5-21-1.1 (waiver of performance security), 5-21-1.3 (waiver for emergency procurement), 5-21-2 (public corporation's liability for failing to require the bond), 5-21-3 and 5-21-4 (use and excise tax coverage), 5-21-5 (right to intervene; pro rata distribution), 5-21-6 (action by laborer or materialman; limitation; venue; single action), 5-21-7 (pro rata distribution; surety's discharge by payment into court), 5-21-8 (personal and published notice to creditors). Threshold cross-reference SDCL 5-18A-14. County and township highway contracts: SDCL 31-12-15.
SDCL ch. 44-9 — Mechanics’ and Materialmen’s Liens — published by the South Dakota Legislature.
Statutory summary as of 29 July 2026. Not legal advice; confirm with a lawyer licensed in South Dakota.