This child custody case began with the filing of a complaint by Jeffrey D. West in which he alleged that he and Dianna L. Marko were the child’s parents. He served that complaint on Ms. Marko by certified mail addressed to her former residence in North Carolina. Apparently, that mailing was forwarded to her at her new residence in Wisconsin, and she acknowledged receiving the complaint but later failed to answer it. Accordingly, the clerk of court entered default against her on 9 July 1996.
Following the entry of default, District Court Judge Jack E. Klass conducted a custody hearing in Ms. Marko’s absence. At the hearing, the evidence before the trial court included Mr. West’s complaint that asserted that he and Ms. Marko were the parents of the minor child. Since the entry of default deemed that allegation admitted, the trial court made no explicit finding of fact that he was indeed the child’s father. We find no evidence that Mr. West offered independent evidence at the custody hearing to show that he was the biological father of the child. Instead, he presented witnesses who testified on his fitness as a parent. Under an order dated 5 August 1996 nunc pro tunc 23 July 1996, Judge Klass found that the child’s best interest was to be in Mr. West’s custody. In response, Ms. Marko delivered the child from their residence in Wisconsin to Mr. West.
Immediately thereafter, Ms. Marko moved under N.C.R. Civ. P. 55(d) to set aside the 9 July 1996 entry of default, and to vacate or stay the custody order of 5 August 1996. District Court Judge Robert W. Johnson granted temporary visitation rights to Ms. Marko and, by *690an order filed 13 November 1996, set aside the entry of default against her and granted her the opportunity to answer the custody complaint. Ms. Marko then filed an answer and counterclaim, seeking permanent and exclusive custody of the minor child.
At a hearing on the matter on 9 December 1996, District Court Judge James M. Honeycutt denied Mr. West’s motion to dismiss Ms. Marko’s answer and counterclaim. He also orally granted Ms. Marko’s motion to vacate the 5 August custody order, but this oral order was never reduced to writing and entered in accordance with N.C.R. Civ. P. 58. In a written order filed 10 March 1997, Judge Honeycutt awarded custody of the child to Ms. Marko. Mr. West appealed to this Court.
In West v. Marko, 130 N.C. App. 751, 504 S.E.2d 571 (1998) (“West i”), this Court held that since the trial court only set aside the entry of default but failed to also vacate the 5 August 1996 custody order, that order remained a binding and enforceable order. Moreover, in West I, this Court held that the 5 August 1996 order was a valid custody order that could only be modified by showing a substantial change of circumstances affecting the welfare of the child, and since the order dated 10 March 1997 did not make any findings regarding a change of circumstance, that order had to be vacated and the 5 August 1996 order remained in effect.
Immediately following this Court’s opinion in West I, Ms. Marko moved for modification of the 5 August 1996 custody order, based on a substantial change of circumstances affecting the welfare of the child. At the hearing on that motion beginning 1 February 1999, Judge Honeycutt heard the testimony of both parties, several witnesses, and other evidence. Judge Honeycutt made several detailed findings of fact and concluded that the best interests of the child would be served by awarding custody to Ms. Marko. Mr. West appealed to this Court.
On appeal, Mr. West argues that the trial court erred in applying the “best interests of the child” test because this Court, in West I, held that the 5 August 1996 order could only be modified by a showing of a change of circumstances. We conclude that the trial court, in its latest custody order, did in fact apply the change of circumstances test in modifying the earlier custody order.
Permanent custody orders can only be modified by first finding that there has been a substantial change of circumstances affecting *691the welfare of the child. See, e.g.,Metz v. Metz, 530 S.E.2d 79, 80 (N.C. App. 2000). Once the trial court makes the threshold determination that a substantial change has occurred, the trial court then must consider whether a change in custody would be in the best interests of the child. Ramirez-Barker v. Barker, 107 N.C. App. 71, 77, 418 S.E.2d 675, 678 (1992), overruled on other grounds by Pulliam v. Smith, 348 N.C. 616, 620, 501 S.E.2d 898, 900 (1998). The change of circumstances test is a harder standard to meet than the best interests of the child test, as it requires a two-step inquiry.
As long as there is competent evidence to support the trial court’s findings, its determination as to the child’s best interests cannot be upset absent a manifest abuse of discretion. King v. Allen, 25 N.C. App. 90, 92, 212 S.E.2d 396, 397, cert. denied, 287 N.C. 259, 214 S.E.2d 431 (1975). While a trial court’s findings of fact are conclusive on appeal if there is evidence to support them, see Hunt v. Hunt, 85 N.C. App. 484, 488, 355 S.E.2d 519, 521 (1987), the trial court’s conclusions of law are reviewable de novo. See Browning v. Helff, 136 N.C. App. 420, 423, 524 S.E.2d 95, 98 (2000).
In the case at bar, the trial court concluded:
7. That the Court may modify the Order of [5 August 1996] on the basis of its determination of the best interest of the minor child, without the need for finding of a substantial change in circumstances. (emphasis added.)
Under the holding of West I, it was error for the trial court to apply the best interests standard to this case. However, the trial court also made findings of fact showing that there had been a substantial change of circumstances affecting the welfare of the child. Specifically, the trial court found:
13. ... The court finds that there has been a substantial change of circumstances since the condition of the minor child is drastically different than the facts that were given to the Honorable Jack E. Klass. . . . That the Defendant has taken a job at a restaurant which has increased her ability to care for the minor child and allows her to be with the minor child and her other children. That the Defendant has made substantial improvements in her relationship with the minor child because she has arranged her work schedule to allow her to be home when the minor child is with her in the mornings and again when she returns home from pre-kindergarten in the afternoon. . . . (emphasis added).
*69214. ... That the Court finds that there has been a change of circumstances since the Plaintiff has had various women residing with him and the minor child .... (emphasis added).
The trial court also made numerous findings of fact regarding how each parent treated the child and each other; regarding educational opportunities and medical care provided by each parent; regarding the parents’ incomes; and noting that the minor child had spent the vast majority of the past four years living with her mother.
Moreover, we find that there is competent evidence supporting the trial court’s findings of fact that there had been a substantial change of circumstances in this case. The parties and several witnesses testified about the minor child’s care, educational opportunities, babysitters, and the amount of time each parent was able to spend with their daughter. Further, the witnesses testified about each family’s living conditions, including the presence or absence of siblings and other grown-ups in the home. Each of these factors naturally affects the child’s welfare. In particular, we find that the evidence supports the trial court’s findings that there has been a substantial change of circumstances since the 6 August 1996 custody order, especially in regards to the relationship between the child and each parent, and the stability of each home. We find no abuse of discretion in the trial court’s findings of fact.
In short, while the trial court erred under West I in applying the best interests standard to this case, its explicit findings that there had been a substantial change of circumstances affecting the welfare of the child support the conclusion of law modifying the 5 August 1996 custody order. Significantly, our own review of the evidence and findings of fact support such a conclusion. See Rowe v. Rowe, 52 N.C. App. 646, 661, 280 S.E.2d 182, 191 (1981), aff’d in relevant part, 305 N.C. 177, 287 S.E.2d 840 (1982) (wherein this Court concluded as a matter of law that a substantial change of circumstances had occurred in a post-divorce proceeding, even though the trial court concluded otherwise). Having already found that the trial court’s findings of fact were supported by the evidence, and among these facts the trial court found a substantial change of circumstances, we conclude as a matter of law that a change of circumstances occurred.1
*693Finally, we point out for clarification in West I that the 5 August 1996 order was not a default judgment. In West I, this Court held that because the trial court set aside only the entry of default, the custody order of 5 August remained in effect. In so holding, this Court must have relied upon the rationale that the 5 August judgment was not predicated on the allegations deemed admitted by the entry of default. Indeed, when an entry of default is set aside, a resulting default judgment which is predicated on the entry of default cannot stand. See House of Style Furniture Corp. v. Scronce, 33 N.C. App. 365, 369-70, 235 S.E.2d 258, 261 (1977) (holding that when there is a jurisdictional defect in an entry of default, the default judgment predicated on that entry of default cannot stand); Byrd v. Mortenson, 308 N.C. 536, 540, 302 S.E.2d 809, 812 (1983) (remanded for a determination of whether there was “good cause” to set aside an entry of default under N.C.R. Civ. P. 55(d), and vacating the default judgment against the defendants in order for the trial court to make further findings of fact about whether the defendants should be allowed additional time to file their answer). See also P & B Land v. Klungervik, 751 P.2d 274, 276-77 (Ct. App. Utah 1988) (holding that no default judgment may be entered unless default has been entered); Jacobs v. Sheriff, 837 P.2d 436, 437 (Nev. 1992) (questioning whether a valid default judgment could be entered in the absence of a valid default).
Moreover, contrary to the dissenting opinion, our reading of West I does not overrule its holding; rather, we hold that the custody judgment in West I must have been an independent judgment, not a default judgment.2 Simply put, when the default is taken from a default judgment, the remaining judgment, which is by definition dependent on that default, cannot stand. Indeed, an entry of default serves two purposes in support of a default judgment. First, the entry deems the allegations in the complaint admitted. In so doing, the plaintiff is relieved of the obligation of setting forth proof of his allegations to obtain a default judgment. Second, the entry denies the *694responding party the opportunity to answer the complaint. See Spartan Leasing, Inc. v. Pollard, 101 N.C. App. 450, 400 S.E.2d 476 (1991) (holding that an entry of default allows the trial court to treat the plaintiffs allegations as true and prevents the defendant from filing an answer or otherwise defending on the merits of the case). Thus, when an entry of default is set aside, a default judgment based on allegations that are deemed admitted must also be set aside as its foundation of proof has been stripped.
In this case, the custody order of 5 August 1996 was not designated as a default judgment; however, the records on both appeals indicate that Mr. West relied upon the deemed admissions of his complaint to claim rights as a biological father. In his complaint, Mr. West alleged that he and Ms. Marko were the parents of the child. That allegation was deemed admitted by the entry of default; but, upon that entry being set aside, that admission was set aside. Manifestly, neither the present record on appeal nor the one before the Court in West I show that Mr. West presented any independent proof that he was the biological father of the child. Without such proof, the trial court lacked subject-matter jurisdiction to accord him a custody hearing as a biological parent. See N.C. Gen. Stat. § 50-13.1 (1999) (to gain custody of a child, whether temporary or permanent, a party must show some right to do so); Petersen v. Rogers, 337 N.C. 397, 406, 445 S.E.2d 901, 906 (1994) (holding that there are limits on who may bring an action for custody, and that N.C. Gen. Stat. § 50-13.1 is not intended to confer upon strangers the right to seek custody of children unrelated to them). Nonetheless, while the question of subject matter jurisdiction may be raised at any time, because we uphold the trial court’s change of custody order on the grounds that it made sufficient findings to support a modification of the 5 August 1996 order, we do not further address the issue of whether the 5 August 1996 custody order was predicated on the entry of default. See In re Spivey, 345 N.C. 404, 480 S.E.2d 693 (1997) (“It is well established . . . that a challenge to the trial court’s subject matter jurisdiction may be made at any time, even on appeal to this Court.”)
In sum, Judge Honeycutt made findings of fact that there had been a substantial change of circumstances affecting the welfare of the minor child. While he erroneously concluded that he did not need to make these findings, the fact that he actually did so negates any effect of his erroneous conclusion. Since the trial court applied the proper standard by making findings regarding a change of circumstances, we affirm the decision to modify the earlier custody order.
*695Affirmed.
Judge FULLER concurs in a separate opinion written prior to 31 December 2000.
Judge GREENE dissents.