
43 P.3d 67 (2002)
110 Wash.App. 883
ROBIN L. MILLER CONSTRUCTION CO., INC., a Washington corporation; and Appellant,
Jim Paris, d/b/a Paris Plumbing, Plaintiff,
v.
David COLTRAN, d/b/a Shea's Styling Shop, and "Jane Doe" Coltran, husband and wife, and the marital community composed thereof, Defendants, and
Kevin Hyppa and Kari Hyppa, husband and wife, Intervenors and Respondents.
No. 47436-7-I.
Court of Appeals of Washington, Division 1.
April 1, 2002.
*69 Bernard G. Lanz, Seattle, for Appellant.
Amanda E. Vedrich, Thomas F. Peterson, Seattle, for Respondents.
Michael C. Mainati, for Defendants.
*68 COLEMAN, J.
Following the Legislature's amendment to the homestead act, Robin Miller Construction Co., Inc. (RMC) made a second attempt to obtain a writ of execution upon the Hyppas' property. The trial court denied its motion to appoint an appraiser, a prerequisite to executing on the property. RMC appeals, arguing that the trial court erred in denying the motion because (1) there is no evidence in the record that the Hyppas' homestead will be impaired by issuing a writ of execution, (2) that the amended homestead act applies retroactively, (3) the homestead act allows more than one attempt to obtain a writ of execution, (4) the Hyppas are not bona fide purchasers, and (5) principles of res judicata and laches do not bar its claim. Because the amended homestead act properly applies to this case, we reverse and remand.

FACTS
On September 28, 1989, RMC obtained a default judgment against David Coltran and his wife for $10,121.37, plus interest. Three years later, after failing to collect on the judgment through garnishment proceedings, RMC recorded a judgment lien against the Coltrans' property. Robin L. Miller Constr. Co. v. Coltran, 87 Wash.App. 112, 114, 940 P.2d 661 (1997) (RMC I). Meanwhile, in August 1992, the Coltrans obtained a loan from the Household Finance Corporation (HFC) secured by a recorded deed of trust on the property. RMC I, 87 Wash.App. at 114, 940 P.2d 661. When the Coltrans defaulted on their loan, HFC foreclosed on the property and sold it to the Hyppas who occupy it as their homestead. RMC I, 87 Wash.App. at 114, 940 P.2d 661. HFC recorded a deed of trust to secure the loan. RMC I, 87 Wash.App. at 114, 940 P.2d 661.
When RMC moved for a writ of execution on the property, the trial court quashed it because there was not enough value in the property to pay HFC's deed of trust, RMC's judgment lien, and the Hyppas' homestead exemption. RMC I, 87 Wash.App. at 114-15, 940 P.2d 661. After this court affirmed the trial court, the Legislature amended the statute to require that this net value calculation include the homestead exemption and only liens and encumbrances senior to the judgment being executed upon (i.e., not HFC's deed of trust). RCW 6.13.010(3); RMC I, 87 Wash.App. at 119, 940 P.2d 661. Based on this amendment, RMC made a second attempt to obtain a writ of execution by filing a motion to appoint an appraiser. Attached to the motion as an exhibit is an order extending judgment that RMC properly filed in 1999 before the expiration date of the judgment. See RCW 6.17.020. According to the order, $22,275.87 was the outstanding balance on the judgment with interest accruing at 12 percent per year. With no specific reasons given, however, the trial court denied the motion to appoint an appraiser. RMC appeals.

DISCUSSION
We review issues regarding statutory construction de novo. RMC I, 87 Wash.App. at 115, 940 P.2d 661. A homestead is property that the owner uses as his or her principal residence. RCW 6.13.010(1). Homestead property is exempt from execution or forced sale for the debts of the owner up to the lesser of (1) its total net value or (2) the sum *70 of $40,000. RCW 6.13.030, .070. RCW 6.13.090 states: "A judgment against the owner of a homestead shall become a lien on the value of the homestead property in excess of the homestead exemption from the time the judgment creditor records the judgment with the recording officer of the county where the property is located...." To execute against a homestead property, a judgment creditor must petition for the appointment of an appraiser. RCW 6.13.100. This petition must show that the net value of the homestead exceeds the homestead exemption amount. RCW 6.13.110(3). According to the statutory definition amended in 1999, net value is the "market value less all liens and encumbrances senior to the judgment being executed upon and not including the judgment being executed upon." RCW 6.13.010(3).

I. Appointment of an Appraiser

RMC argues that the trial court denied its petition to appoint an appraiser without any evidence in the record that the Hyppa's homestead exemption would be impaired by an execution of RMC's judgment lien, even if the court included junior liens in the net value calculation. RCW 6.13.110(3) requires, without qualification, a mere "showing" that the homestead property's net value exceeds the homestead exemption. See, e.g., 28 Marjorie Dick Rombauer, Washington Practice: Creditors' Remedies-Debtors' Relief § 7.30.31, at 111-13 (1998). In a declaration submitted to the trial court to support its petition for the appointment of an appraiser, RMC estimated that there was at least $100,000 in excess value over the $30,000 homestead exemption that existed at the time of judgment. Although the Legislature has since increased the homestead exemption to $40,000, RMC stated that it believed that the excess value had increased even more over time. This declaration appears to meet the statutory requirements for a petition contained in RCW 6.13.110(3).
Based on (1) proof of service of a copy of the petition with notice of the hearing and (2) the facts stated in the petition, the judge can appoint an appraiser. RCW 6.13.130; see also RCW 6.13.120 (ten-day notice). Construing the predecessor to this statutory provision, the Supreme Court found that the trial court had a "duty" to appoint appraisers when the judgment creditor alleged and the homestead declarant admitted in an estimate that the homestead property contained a value over the homestead exemption. Nelsen v. McKeen, 165 Wash. 274, 5 P.2d 333 (1931). Because RMC's declaration alleges an estimated excess value above the homestead exemption, the trial court had a duty to appoint an appraiser unless it found some other grounds for not doing so. In its order denying such an appointment, however, it stated no such grounds. Presumably, the trial court determined that amended RCW 6.13.010(3) did not apply or that a second attempt to obtain a writ of execution was barred. This brings us to the crux of the appeal: Whether the trial court should have applied amended RCW 6.13.010(3) in determining net value.

II. Prospective or Retroactive Application

The Hyppas contend that applying amended RCW 6.13.010(3) to determine the net value of their homestead property is impermissibly retroactive. There is a presumption that legislative amendments are prospective in application. In re Detention of Brooks, 145 Wash.2d 275, 284, 36 P.3d 1034 (2001). A statutory amendment is not retrospective merely because it relates to prior facts. City of Walla Walla v. Topel, 104 Wash.App. 816, 822, 17 P.3d 1244 (2001). Indeed, the amendment in question applies prospectively in this case. RMC had a present judgment lien against the Hyppas' property and petitioned for the appointment of an appraiser after the Legislature amended RCW 6.13.010(3). Therefore, the amended statute applies prospectively to RMC's petition for appointment of an appraiser. Accordingly, we conclude that RMC is entitled to seek an appraisal of the net value as defined in the amended statute.
Even if the amended statute did not apply prospectively, it would have retroactive effect. A statutory amendment is retroactive in application if (1) the Legislature clearly intended it to be so in the language of the statute, (2) it is curative, or (3) it is *71 remedial. Brooks, 145 Wash.2d at 285, 34 P.3d 1218; State v. Smith, 144 Wash.2d 665, 673, 30 P.3d 1245 (2001); 39 P.3d 294. Among the other grounds, RMC contends that the amended definition of net value is retroactive because it is remedial. A statutory amendment is remedial if it relates to practice, procedures, or remedies and does not affect a substantial or vested right. Smith, 144 Wash.2d at 674, 30 P.3d 1245; Marine Power & Equip. Co. v. Washington State Human Rights Comm'n Hearing Tribunal, 39 Wash.App. 609, 617, 694 P.2d 697 (1985). In Marine Power, this court held that an amendment that created "a supplemental remedy for enforcement of a preexisting right" was remedial. Marine Power, 39 Wash.App. at 617, 694 P.2d 697. RMC argues that amended RCW 6.13.010(3) enables judgment lien creditors to obtain a writ of execution to enforce their judgment liens in situations where they were unable to do so previously. We agree.
Contrary to the Hyppas' contentions, the homestead act does not deprive creditors of all rights. RCW 6.13.090 gives creditors the right to a judgment lien on the value of the homestead property beyond the homestead exemption. Granted, the homesteader has a vested right in the homestead exemption. In re Marriage of Lewis, 45 Wash. App. 1, 3-1, 723 P.2d 545 (1986). But, the homesteader does not have a vested right in the value of the homestead property in excess of the exemption. See RCW 6.13.090. Although amended RCW 6.13.010(3) defined net value to the Hyppas' advantage when they purchased the property, they have no vested right in a mere expectation that an existing statute would preclude retroactive amendment, unless they have some legal or equitable title to the property or legal exemption. Olesen v. State, 78 Wash.App. 910, 917, 899 P.2d 837 (1995). Because the Hyppas have a vested right in their homestead exemption only, not in the excess value of the homestead, we conclude that amended RCW 6.13.010(3) is remedial and, therefore, retroactive.
Nonetheless, the Hyppas contend that the Legislature cannot amend a statute retroactively to circumvent this court's previous opinion in this case. They insist that this effectively makes the Legislature the court of last resort and raises serious separation of powers concerns.[1] We need not address this issue because legislative amendments for remedial purposes have retroactive effect. Brooks, 145 Wash.2d at 285, 34 P.3d 1218; Marine Power, 39 Wash.App. at 615-17, 694 P.2d 697. Here, the Legislature amended an unambiguous definition of net value for remedial purposes. Accordingly, the amended statute has retroactive effect.

III. Res Judicata

The Hyppas maintain that res judicata bars RMC's second attempt to execute against their property. In short, res judicata or claim preclusion principles prevent a party from bringing the same cause of action against the same person for the same subject matter. Kuhlman v. Thomas, 78 Wash.App. 115, 120, 897 P.2d 365 (1995). An attempt to execute a judgment lien, however, is not a cause of action. Rather, it is an enforcement proceeding to collect upon a previously obtained judgment. RCW 6.17.020. Because an attempt to execute a judgment lien is not a cause of action, we find that res judicata principles do not apply to this case.

IV. Bona Fide Purchaser

Next, the Hyppas argue that the bona fide purchaser doctrine bars RMC's attempt to execute against their property. Under the bona fide purchaser doctrine, a person has a superior interest in property that he or she purchases (1) for value, (2) in good faith, and (3) without actual or constructive notice of another's interest in the property. Levien v. Fiala, 79 Wash.App. 294, 298, 902 P.2d 170 (1995). According to a declaration by Kevin Hyppa, he and his wife did not have notice of the judgment lien when they purchased their property.
Normally, an entry of judgment serves as constructive notice of a judgment lien upon all real property of the judgment *72 debtor in the county of the superior court entering the judgment, unless a statute requires more. Fed. Intermediate Credit Bank v. O/S Sablefish, 111 Wash.2d 219, 223, 758 P.2d 494 (1988). In Sablefish, however, the court noted that a judgment does not become a lien against the value of a homestead property in excess of the homestead exemption until recorded. Sablefish, 111 Wash.2d at 225, 758 P.2d 494 (citing RCW 6.13.090). Therefore, a recorded judgment gives constructive notice of the lien to prospective purchasers of the homestead property. RMC recorded their judgment before the Hyppas purchased the property. Accordingly, the Hyppas had constructive notice of RMC's judgment lien. We conclude that the bona fide purchaser doctrine does not bar RMC from executing against the homestead property.

V. Multiple Writs of Execution

The Hyppas also argue that the homestead act permits only one attempt to execute on the same homestead. RCW 6.17.020(1) allows a party to execute upon a judgment at any time within ten years from the date of entry. A judgment creditor may apply for an additional ten years within 90 days of the expiration date. RCW 6.17.020(3). Although RMC has obtained this ten-year extension, it has not yet obtained a successful execution. In both attempts, the trial court quashed the writ of execution. Because RMC has not levied a successful execution to date, it is entitled to avail itself of the execution statute.

VI. Laches

Finally, the Hyppas contend that the doctrine of laches bars RMC's second attempt to execute. Laches is an equitable defense that a party may invoke if it can prove that (1) the plaintiff knew or reasonably should have known the facts giving rise to the action, but (2) unreasonably delayed bringing the action, and (3) the delay caused damages to the defendant. In re Marriage of Capetillo, 85 Wash.App. 311, 316, 932 P.2d 691 (1997). Because RCW 6.17.020 expressly provides RMC with the ability to seek execution at this time, the common law doctrine of laches cannot bar execution absent unusual circumstances. Capetillo, 85 Wash.App. at 316, 932 P.2d 691; see also Hamilton v. Carter, 12 Wash. 510, 517-18, 41 P. 911 (1895) (execution may issue at any time during statutory period despite delay); cf. Meikle v. Cloquet, 44 Wash. 513, 517, 520, 87 P. 841 (1906) (judgment ceased to be a lien after statutory period expired and laches barred attempt to execute after property passed in probate).
Here, the circumstances do not seem so unusual to justify cutting short the statute of limitations for unreasonable delay. RMC obtained a default judgment against the Coltrans in September 1989 and attempted to collect through garnishment proceedings in 1993. Unfortunately, the Coltrans filed for bankruptcy, allowing HFC to foreclose on their property and acquire title in 1994. RMC attempted to execute against the property a year after HFC sold the property to the Hyppas, but the trial court quashed its writ of execution. After this court decided RMC's appeal in June 1997, the Legislature sought to amend the homestead act, ultimately passing the amendment in 1999. Final Leg. Rep., 56th Leg. (Wn.1999), at 47 (HB 1233); RMC I, 87 Wash.App. 112, 940 P.2d 661. RMC timely extended the judgment before its expiration date that year. About one year later, RMC again attempted to execute against the Hyppas' property by petitioning for the appointment of an appraiser. Given the financial and legal barriers in collecting upon the judgment, first against the Coltrans and then against the homestead property later owned by the Hyppas, we find that the delay was not unreasonable and did not constitute an unusual circumstance to justify cutting short the statute of limitations. Therefore, the doctrine of laches does not preclude RMC from executing upon its judgment.

CONCLUSION
We hold that the amended definition of net value applies prospectively to present judgment liens or retroactively for remedial purposes. The doctrines of res judicata, bona fide purchaser and laches do not prevent *73 RMC from executing its judgment lien against the Hyppas' homestead property.
We reverse and remand.
WE CONCUR: KENNEDY and APPELWICK, JJ.
NOTES
[1]  For discussion of this topic, see Brooks, 145 Wash.2d at 285-86, 34 P.3d 1218; State v. Dunaway, 109 Wash.2d 207, 216 n. 6, 743 P.2d 1237 (1987).
