Citizens Access to Justice Act of 1998 - Authorizes an owner of private property to challenge the validity of any Federal agency action as a violation of the fifth amendment to the U.S. Constitution in a district court or the United States Court of Federal Claims (Claims court). Grants the district court and the Claims court concurrent jurisdiction over claims for monetary relief and claims seeking invalidation of any Act of Congress or any Federal regulation affecting private property rights.

Authorizes the plaintiff to elect to file an action under this Act in a district court or the Claims court. Waives U.S. sovereign immunity with respect to such an action and grants the United States Court of Appeals for the Federal Circuit exclusive jurisdiction.

Sets a six-year statute of limitations. Directs the court to award litigation costs, including reasonable attorney's fees, to any prevailing plaintiff.

(Sec. 6) Modifies Federal judicial code provisions to grant the Claims court jurisdiction to render judgment upon any claim under this Act against the United States for monetary relief founded either upon the Constitution, any Act of Congress, or any regulation of an executive department, or upon any express or implied contract with the United States in cases not sounding in tort, or for invalidation of any Act of Congress or any regulation of an executive department.

Sets forth provisions regarding the Claims court's: (1) supplemental jurisdiction; and (2) jurisdiction which constitutes judicial review of agency action.

Makes any claim brought under this Act founded upon a property right or privilege secured by the Constitution but allegedly infringed or taken by the United States ripe for adjudication upon a final decision rendered by the United States that causes actual and concrete injury to the party seeking redress. Sets forth guidelines as to what constitutes a final decision.

Repeals provisions regarding pendency of claims in other courts. Grants the district courts original jurisdiction, concurrent with the Claims court, over any civil action filed under this Act.

Prohibits a district court, whenever it exercises civil rights jurisdiction in an action in which the operative facts concern the uses of real property, from abstaining from exercising jurisdiction or relinquishing it to a State court in an action where no claim of a violation of a State law, right, or privilege is alleged and where a parallel proceeding in State court arising out of the same operative facts is not pending.

Authorizes the district court, where it has jurisdiction over such an action which cannot be decided without resolution of an unsettled question of State law: (1) to certify the question of State law to the highest appellate court of that State; and (2) after that court resolves the question, to proceed with resolving the merits. Prohibits the court from certifying a State law question unless it will significantly affect the merits of the injured party's Federal claim and unless it is patently unclear.

Specifies that any claim or action brought to redress the deprivation of a property right or privilege secured by the Constitution shall be ripe for adjudication by the district courts upon a final decision rendered by any person acting under color of any statute, regulation, or usage of any State of U.S. territory that causes actual and concrete injury to the party seeking redress.

(Sec. 7) Requires a Federal agency that takes an agency action limiting the use of private property to give notice to the property owners explaining their rights and the procedures for obtaining any compensation that may be due to them under this Act.

Private Property Rights Implementation Act of 1997 - Amends the Federal judicial code to provide that whenever a district court has jurisdiction in a civil rights case in which the operative facts concern the uses of real property, it shall not abstain from exercising or relinquishing its jurisdiction to a State court in an action where no claim of a violation of a State law, right, or privilege is alleged and where a parallel proceeding in State court arising out of the same operative facts as the district court proceeding is not pending.

Authorizes the district court, in such cases that cannot be decided without resolution of an unsettled question of State law, to certify such question to the highest appellate court of that State. Directs the district court to proceed with resolving the merits after the State appellate court resolves the question. Bars the district court from certifying a question of State law unless it will significantly affect the merits of the injured party's Federal claim and is patently unclear.

(Sec. 3) Provides that: (1) any claim or action brought to redress the deprivation of a property right or privilege secured by the Constitution shall be ripe for adjudication by the district courts upon a final decision rendered by any person acting under color of any statute, ordinance, regulation, custom, or usage, of any State or territory of the United States, that causes actual and concrete injury to the party seeking redress; and (2) any claim that is brought under provisions regarding the United States as defendant and regarding the jurisdiction of the Court of Federal Claims and that is founded upon a property right or privilege secured by the Constitution but allegedly infringed or taken by the United States shall be ripe for adjudication upon a final decision rendered by the United States that causes actual and concrete injury to the party seeking redress.

Sets guidelines for what constitutes a "final decision" in each case above, including providing, respectively, that: (1) a final decision shall not require the party seeking redress to exhaust judicial remedies provided by any State or U.S. territory; and (2) the party seeking redress shall not be required to apply for an appeal to or waiver by an administrative agency if no such appeal or waiver is available, if it cannot provide the relief requested, or if application or reapplication to use the property would be futile.

(Sec. 5) Requires a Federal agency, whenever it takes an agency action limiting the use of private property that may be affected by this Act, to give notice to the owners of that property explaining their rights and the procedures for obtaining any compensation that may be due to them pursuant to amendments under this Act.

Private Property Rights Implementation Act of 1997 - Amends the Federal judicial code to provide that whenever a district court has jurisdiction in civil rights cases it shall not abstain from exercising or relinquishing its jurisdiction to a State court in an action where no claim of a violation of a State law, right, or privilege is alleged.

Authorizes the district court, in such cases that cannot be decided without resolution of a significant but unsettled question of State law, to certify such question to the highest appellate court of that State (and after the State appellate court resolves the question certified to it, the district court shall proceed with resolving the merits). Bars the district court from certifying a question of State law unless such question will significantly affect the merits of the injured party's Federal claim and is so unclear and obviously susceptible to a limiting construction as to render premature a decision on the merits of the constitutional or legal issue in the case.

Requires that any claim or action brought to redress the deprivation of a property right or privilege secured by the Constitution be ripe for adjudication by the district courts upon a final decision rendered by any person acting under color of any statute, ordinance, regulation, custom, or usage, of any State or territory of the United States, that causes actual and concrete injury to the party seeking redress.

Provides that any claim brought under provisions regarding the United States as defendant and regarding the jurisdiction of the Court of Federal Claims that is founded upon a property right or privilege secured by the Constitution, but allegedly infringed or taken by the United States, shall be ripe for adjudication upon a final decision rendered by the United States that causes actual and concrete injury to the party seeking redress.

Sets guidelines for what constitutes a "final decision" for purposes of this Act.