Plaintiff seeks to recover on either one of two theories: (1) that tbe Economy Plumbing & Heating Company was a subcontractor, that defendant bad notice that plaintiff bad not been paid for tbe material furnished by it prior to tbe settlement with tbe contractor and notwithstanding such notice failed to retain a sufficient part of tbe contract price to pay for same; and (2) that tbe Economy Plumbing & Heating Company was an agent or employee and not an independent contractor, that when it purchased material from tbe plaintiff it did so on behalf of defendant and that defendant is liable for tbe purchase price thereof.
Tbe plumbing contractor, under tbe contract between it_and tbe defendant, was an independent contractor and not an agent. It was engaged in an independent business or calling requiring special knowledge, skill and training. Anno. 19 A. L. R., 243. It furnished its own employees. It purchased tbe material necessary for compliance with tbe contract and installed tbe same in accord with plans and specifications furnished and received in compensation a lump sum upon a cost *502plus basis. Evans v. Rockingham Homes, Inc., ante, 253; Beach v. McLean, 219 N. C., 521, 14 S. E. (2d), 515; Hexamer v. Webb, 101 N. Y., 377, 4 N. E., 755; Anno. 19 A. L. R., 1282, et seq.; Anno. 55 A. L. R., 293; Anno. 19 A. L. R., 227, et seq.
“We may take judicial notice tbat the arrangement of paying the cost plus a percentage, as a contract price for a completed job is growing-in favor, and is bec.oming a common plan adopted by contractors in place of a lump sum payment . . . Tbe change is only in the method of computing payment. There is no change in the relation of the parties from that which exists where the payment is a lump sum. The manner of computing payment for the completed job is not controlling; a change in this regard does not convert an independent contractor into an employee.” Carleton v. Foundry & Machine Products Co., 19 A. L. R., 1141 (Mich.).
The cost of the material was the basis of the compensation. The owner, therefore, was directly affected by any charge therefor. Its inquiry concerning and its objection to the charge for plaintiff’s pump is not evidence of any supervision or control over the manner and method of doing the work so as to show that the plumbing contractor was an employee and not an independent contractor. Nor was the conduct of defendant’s construction engineer such as to change the relationship.
When a contractor has undertaken to do a piece of work, according to plans and specifications furnished, and within the meaning of the definitions referred to, this relation of independent contractor is not affected or changed because the right is reserved for the engineer, architect or agent of the owner or proprietor to supervise the work to the extent of seeing that the same is done pursuant to the terms of the contract. Johnson v. R. R., 157 N. C., 382, 72 S. E., 1057.
Furthermore, where a claimant elects to file notice of a lien on the theory that material was furnished to a subcontractor he is estopped under the doctrine of election of remedies from thereafter asserting that such material was sold direct to the owner. Lumber Co. v. Perry, 212 N. C., 713, 194 S. E., 475.
In Lumber Co. v. Motor Co., 192 N. C., 377, 135 S. E., 115, and in Construction Co. v. Holding Corp., 207 N. C., 1, relied on by plaintiff, the facts are essentially different. Neither is in point or controlling.
While it is true that when a contractor furnishes a list of laborers and materialmen to whom he is indebted, the owner must retain a sufficient part of the contract price to satisfy such claims, Mfg. Co. v. Holladay, 178 N. C., 417, 100 S. E., 597; Building Supplies Co. v. Hospital Co., 176 N. C., 87, 97 S. E., 146; Perry v. Swanner, 150 N. C., 141, 63 S. E., 611; Pinkston v. Young, 104 N. C., 102, the burden is on plaintiff to show that such notice was so given by the contractor or that the *503owner was notified directly by him. There is no lien until and unless the statutory notice either under O. S., 2439, or under C. S., 2440, has been given. Pinkston v. Young, supra.
Such notice or itemized statement must be filed in detail specifying the material furnished or labor performed and the time thereof. It must further show the amount due and unpaid so as to put the owner on -notice that such amount is demanded. Construction Co. v. Journal, 198 N. C., 273, 151 S. E., 631, and cases cited; Hardware House v. Percival, 203 N. C., 6, 164 S. E., 334. Neither invoices furnished under the contract nor statements made by the contractor to enable him to procure what is due, nor mere knowledge of the owner of the existence of the debt is sufficient to charge him with liability. Clark v. Edwards, 119 N. C., 115; Building Supplies Co. v. Hospital Co., supra; Hardware House v. Percival, supra.
Applying these principles, it clearly appears that the plaintiff failed to give the owner the required notice of its claim so as to impose liability. Invoices were submitted from time to time so that the defendant might check the cost of material and compute the percentage to the Economy Plumbing & Heating Company. These invoices were not intended as notice of a claim due and were not sufficient for that purpose. They were not “an itemized statement of the amount owing for material furnished” rendered for the purpose of giving notice of a claim for material.
The statement rendered by the contractor, upon which plaintiff relies, was in connection with the work and for the purpose of disclosing the total lump sum due under the contract. As the contractor was entitled to pay for material furnished and for commissions thereon only in the event he had paid therefor this statement tends to show that the material had been paid for rather than that there was any outstanding account for material furnished. It fails to disclose that any amount is due the plaintiff or any other person furnishing material or performing labor in connection with the contract.
The plaintiff sold and delivered to the plumbing contractor the pump which is the subject matter of this action. Credit was extended to him and it has failed to offer any evidence tending to show that the owner received any statutory notice of its claim prior to the time the owner made full settlement with the contractor. The judgment of nonsuit was properly entered.
Affirmed.