Appellants appeal an order of the district court granting appellees' motion to dismiss appellants' first and second claims and remanding the third and final claim to the state court. On appeal, appellants raise four arguments: (1) the district court erred in failing to abstain and to remand all federal issues to the state court; (2) the district court erred in concluding that appellants' allegations did not identify a property interest under Colorado law protected by the United States Constitution; (3) the district court erred by reaching its findings based on insufficient evidence; (4) the district court abused its discretion by refusing to accept appellants' offer of additional information regarding the variance provisions of the zoning ordinance of the City of Louisville and by refusing appellants' amended complaint. We exercise jurisdiction under 28 U.S.C. § 1291 and affirm.

Before appellant Lehman purchased property in the City of Louisville, Colorado, he consulted several Louisville agents and employees regarding his plans to use the property jointly as a residence and as an office space. Louisville's Director of Community Development allegedly knew how Lehman intended to use the property. He assured Lehman that his proposed use of the property--which included both residential and commercial uses--complied with Louisville's zoning ordinances and encouraged Lehman to undertake the project. Relying on these assurances and the assurances of other Louisville officials, Lehman purchased and renovated the property.

On September 26 and 29, 1989, Louisville issued written confirmations that Lehman's intended use of the property was a "use by right." Nevertheless, on October 18, 1989, appellee David Stahl, Louisville's City Administrator, told Lehman that his intended use violated a Louisville zoning ordinance. On October 24, 1989, Lehman received a letter from Stahl confirming that position. Louisville's Municipal Code § 17.08.225 applies to appellants' property and expressly prohibits appellants' proposed commercial use.1

The appellants then commenced this action in the state district court for Boulder County, Colorado, against the City of Louisville, Colorado. The state district court granted the appellees' motion to dismiss and then allowed the appellants to amend their complaint. In their amended complaint, appellants added two claims under 42 U.S.C. § 1983 in addition to the equitable estoppel claim contained in the first complaint.

On March 8, 1991, appellees removed this action to the United States District Court for the District of Colorado. Appellees subsequently moved to dismiss appellants' claim under Fed.R.Civ.P. 12(b)(6) because the complaint failed to state a claim upon which relief could be granted. The district court granted appellees' motion on April 30, 1991, and this appeal followed.

We exercise de novo review over the district court's dismissal of a complaint under Fed.R.Civ.P. 12(b)(6) for failure to state a claim for which relief could be granted. Swanson v. Bixler, 750 F.2d 810, 813 (10th Cir.1984). We uphold a dismissal only if it appears that the plaintiff cannot prove any set of facts that support the claims that would entitle the plaintiff to relief. Hishon v. King & Spalding, 467 U.S. 69, 73, 104 S. Ct. 2229, 2232, 81 L. Ed. 2d 59 (1984).

Appellants first argue that they possess a constitutionally protected interest in property under Colorado law. Essentially, appellants assert that their change of position in reliance on the representation of the officials of Louisville created a protected property right under Colorado law. They contend that appellees' actions deprived them of a vested property interest without procedural due process. They also argue that appellees violated their substantive due process rights by arbitrarily depriving them of an interest in property.

To succeed on these due process claims under 42 U.S.C. § 1983, appellants must first demonstrate that the actions of the officials in this case created a property interest that warrants due process protection.2 We stated in Jacobs, Visconsi & Jacobs v. City of Lawrence, 927 F.2d 1111 (10th Cir.1991), that "[a] property interest protected by the due process clause results from a legitimate claim of entitlement created and defined 'by existing rules or understandings that stem from an independent source such as state law.' " Id. at 1116 (quoting Board of Regents v. Roth, 408 U.S. 564, 577, 92 S. Ct. 2701, 2709, 33 L. Ed. 2d 548 (1972)). Thus, to satisfy this standard, appellants must allege sufficient facts in their amended complaint that give rise to an expectation of a right to use their property as both a residence and an office. Id.

Appellants attempt to base this expectation on an estoppel theory--that reliance to their detriment on certain statements of Louisville officials created a property interest in their proposed use of their property. This contention fails, however, because the facts alleged in the amended complaint do not amount to a claim of estoppel under Colorado law. "A party cannot state a claim for relief under a theory of estoppel against a state or local government entity on the basis of an unauthorized action or promise." Seeley v. Board of County Comm'rs, 791 P.2d 696, 701 (Colo.1990). Only the Louisville City Council can "regulate and restrict the ... use of buildings ... for trade, industry, residence or other purposes." Colo.Rev.Stat. § 31-23-301. The officials that spoke with appellants simply lacked the authority to bind the City Council in any way. Appellants contend that Louisville city ordinances empower the zoning administrator to interpret zoning ordinances. See Louisville Municipal Code §§ 17.52.040-.050. This contention, however, does not account for the fact that the zoning administrator is not authorized to alter an established zoning ordinance that appellants' proposed property use clearly violates. Furthermore, appellants' complaint does not allege that the Director of Community Development's representations constitute a reasonable "interpretation" of an existing zoning ordinance.

Additionally, the amended complaint does not allege sufficient facts to justify reliance on the statements made by Louisville officials. Appellants clearly had the resources and the access to the information that would have allowed them to determine that this particular use of the property was not allowed. See Sandomire v. City and County of Denver, 794 P.2d 1371 (Colo.App.1990) (plaintiff was not justified in relying on city attorney's assurances when he was aware of established city requirements to the contrary); Van Pelt v. State Bd. for Community Colleges & Occupational Educ., 195 Colo. 316, 577 P.2d 765, 771 (1978) (plaintiff could not show requisite reasonable reliance on college council's recommendation that he be reappointed as dean because "he was charged with knowledge that the [State Board for Community Colleges and Occupational Education] had exclusive hiring authority [by statute] and that any hiring decision would be subject to its approval"). For these reasons, appellants have failed to meet the requirements for estoppel under Colorado law and, therefore, cannot base the existence of a protected property interest on estoppel grounds.3

Appellants assert that the district court acted on insufficient evidence and abused its discretion. Appellants contend that because the district court did not cite specific zoning ordinance variance provisions, the court had neither evidence nor law from which it could derive that a variance provided a remedy. This argument misses the point of the district court's holding. The court stated that "absent a zoning variance granted by the appropriate Louisville authority, the Plaintiffs do not have a legitimate claim." The court clearly focused on whether appellants state some form of entitlement, not whether they have an appropriate remedy. The district court correctly determined that, absent a zoning variance granted by the appropriate Louisville authority, appellants cannot demonstrate justifiable reliance to support the invocation of estoppel doctrines. It follows that because appellants' estoppel argument fails, they cannot prove an entitlement to property.

Appellants argue that the district court should have abstained from this case under either Railroad Commission of Texas v. Pullman Co., 312 U.S. 496, 61 S. Ct. 643, 85 L. Ed. 971 (1941) or Burford v. Sun Oil Co., 319 U.S. 315, 63 S. Ct. 1098, 87 L. Ed. 1424 (1943). Appellants contend that the issues presented in this case are fundamental and important questions of state law and policy that state courts should be allowed to answer in the first instance. Burford abstention arises when a federal district court faces issues that involve complicated state regulatory schemes. Under Pullman abstention, a district court should abstain if three conditions are satisfied: (1) an uncertain issue of state law underlies the federal constitutional claim; (2) the state issues are amenable to interpretation and such an interpretation obviates the need for or substantially narrows the scope of the constitutional claim; and (3) an incorrect decision of state law by the district court would hinder important state law policies. Vinyard v. King, 655 F.2d 1016, 1018 (10th Cir.1981).

After reviewing the record in this case and the basis of the district court's opinion, we conclude that abstention under either Pullman or Burford would be inappropriate. With regard to abstention under Pullman, this case simply does not involve uncertain issues of state law. Further, we find that this case does not involve issues concerning a complicated state regulatory scheme mandating abstention under Burford. Our determination of whether appellants have a property interest will in no way "upset sensitive state programs." Vinyard, 655 F.2d at 1021. Rather, the issues in this case "present[ ] no more than a run-of-the-mill dispute over whether a particular set of facts arises to a property interest." Id.

III. DENIAL OF MOTION FOR LEAVE TO AMEND COMPLAINT

Finally, appellants also claim that the district court abused its discretion in denying their motion to amend their complaint and to file a second amended complaint addressing the issue of the unconstitutionality of the Governmental Immunity Act amendments of 1986. We can find no abuse of discretion. When the district court properly dismissed appellants' federal law claims, it concluded that it should not take jurisdiction over the remaining state law claim. The district court then remanded the case to the state district court. When the motion to amend the complaint was presented to the federal district court, it no longer had jurisdiction over the action. Thus, the district court properly denied appellants' motion to amend the complaint.

AFFIRMED.