Plaintiff Richard Stanford alleges that he purchased a hot water heater at a retail store of defendant Home Depot U.S.A., Inc. located in California. He asserts that he contracted with and paid defendant to have the heater installed and appropriate permits obtained, but that defendant failed to obtain the necessary permit and, contrary to the parties’ contract, charged him more for the permit than the local municipality actually charged. Plaintiff brought his action on behalf of a putative class of similarly situated California residents. After removing this case from state court, defendant raised a question of whether plaintiff lacked standing, which the district court resolved on summary judgment. On summary judgment, there was no genuine factual dispute that the alleged excess permit charge was refunded on the day after the purchase and that a permit was issued a few months after the installation and prior to plaintiff filing his lawsuit. Holding there was no evidence of any injury caused to plaintiff by a delay, the district court dismissed the case without prejudice for lack of standing.
On appeal, plaintiff contends his individual claim still existed because the inspection necessary to complete the permit *818process had not occurred. Plaintiff also contends that the permit was not issued until after he sent defendant notice of a state consumer law violation and that defendant may not “pick off’ the named plaintiff of a putative class action by providing relief only to that person. It is further contended that the district court violated Fed.R.Civ.P. 56(f) by not allowing plaintiff an opportunity for discovery prior to ruling on summary judgment. Alternatively, plaintiff contends the district court should have permitted discovery as to contact information for putative class members so that a new named plaintiff could have been substituted for plaintiff.
A district court’s summary judgment ruling is reviewed de novo. Sprint PCS Assets, L.L.C. v. City of Palos Verdes Estates, 583 F.3d 716, 720 (9th Cir.2009). As to the Rule 56(f) issue, “[district courts have wide latitude in controlling discovery, and decisions not to permit further discovery in response to motions made pursuant to Fedez'al Rule of Civil Procedure 56(f) are reviewed for abuse of discretion.” United States v. Johnson Controls, Inc., 457 F.3d 1009, 1023 (9th Cir.2006).
Article III standing goes to a court’s subject matter jurisdiction. Cetacean Cmty. v. Bush, 386 F.3d 1169, 1174 (9th Cir.2004). Article III requires that a plaintiff “show that (1) it has suffei’ed an ‘injury in fact’ that is (a) concrete and particularized and (b) actual or imminent, not conjectural or hypothetical; (2) the injury is faii’ly traceable to the challenged action of the defendant; and (3) it is likely, as opposed to merely speculative, that the injury will be redressed by a favorable decision.” Id. (quoting Friends of the Earth, Inc. v. Laidlaw Envtl. Serv. (TOC), Inc., 528 U.S. 167, 180-81, 120 S.Ct. 693, 145 L.Ed.2d 610 (2000)).
Plaintiff contends he was still suffering an injury at the time he brought this action on October 12, 2007 because his permit was not legally complete. Uncontested evidence established that a “no-plan permit” was required for plaintiffs hot water heater. It was not required that a plan be “reviewed” before construction, but municipal rules provided the water heater installation still had to be inspected after completion and “[t]he project is not legally complete until it passes the final inspection.” That inspection, however, need only be completed prior to the expiration of the permit. Undisputed evidence establishes the water heater was installed on May 30, 2007, a permit issued September 13, 2007 before suit was filed, and the permit did not expire until September 7, 2008. It is also undisputed that, by no later than January 2008, plaintiff learned a permit had been issued. There is no contention that the City’s rules or the parties’ contract required that defendant’s installer schedule or be present for the inspection— plaintiff was responsible for scheduling the inspection at his residence. Any delay in informing plaintiff that a permit had been issued did not cause a “legal completeness” injury. • When this action was filed, when it was removed to federal court, and when plaintiff learned of a permit in January 2008, he still had months to schedule and complete the required inspection.1 Plaintiff did not satisfy his burden of establish*819ing the existence of an actual injury at the time this action was brought.
Although there was no existing injury when this case was brought, plaintiff contends it was nevertheless improper to “pick him off’ by applying for the permit after he had sent the notice required for one of his state law claims. See Cal. Civ. Code § 1782(a); see also id. §§ 1782(b)-(c). But even if state law provides a litigant in plaintiffs situation has statutory standing to continue to act as a private attorney general in state court, in federal court he must also satisfy Article III standing requirements. Lee v. American Nat’l Ins. Co., 260 F.3d 997, 1001-02 (9th Cir.2001); Hangarter v. Provident Life & Accident Ins. Co., 373 F.3d 998, 1021-22 (9th Cir.2004); Cattie v. Wal-Mart Stores, Inc., 504 F.Supp.2d 939, 942 (S.D.Cal.2007). Since he had no injury when this action was brought, plaintiff did not satisfy Article III standing requirements. Also, since plaintiff had no live claim and therefore no standing when the case was first brought, this is not a situation in which the case can continue with a putative class member substituted as the named plaintiff. Lierboe v. State Farm Mut. Auto. Ins. Co., 350 F.3d 1018, 1022-23 (9th Cir.2003); Blackwell v. SkyWest Airlines, Inc., 245 F.R.D. 453, 463 (S.D.Cal.2007); Charles Alan Wright, Arthur R. Miller, & Mary Kay Kane, Fed. Prac. & Proc. Civil 3d § 1785.1 at 418 & n. 44. (2005). Compare Sosna v. Iowa, 419 U.S. 393, 95 S.Ct. 553, 42 L.Ed.2d 532 (1975) (named plaintiffs individual claim became moot after action was commenced); Employers-Teamsters Local Nos. 175 & 505 Pension Trust Fund v. Anchor Capital Advisors, 498 F.3d 920, 924-25 (9th Cir.2007) (same); Fed. Prac. & Proc. Civil 3d § 1785.1 at 405-15, 427-28 (same).
In order to prevail on the Rule 56(f) issue, plaintiff must establish on appeal that the denial of a continuance to engage in discovery resulted in “actual and substantial prejudice.” See Martel v. County of Los Angeles, 56 F.3d 993, 995 (9th Cir.1995) (en banc). See also Burlington N. Santa Fe R.R. v. Assiniboine & Sioux Tribes, 323 F.3d 767, 774 (9th Cir.2003) (district court did not err when it refused to grant additional discovery under Rule 56(f) since additional discovery would be futile). A remand could only be appropriate if plaintiff was improperly denied the opportunity to obtain discovery that potentially would have enabled him to avoid dismissal by showing that he suffered and continued to suffer an injury that would have supported standing. The facts plaintiff was required to establish were facts that generally are within the knowledge of the plaintiff, not the defendant. The additional briefing that was ordered in the district court concerned “discrete issues uniquely within the knowledge of plaintiff or easily ascertainable by him.” To the extent plaintiff could not establish claimed injuries through his own declaration or obtain other competent support, he should have been capable of both describing his injuries and the additional discovery he would need in order to submit competent proof. On appeal, however, plaintiff does not point to any material facts favorable to him that would potentially have been provable by additional discovery, so it cannot be held that it was reversible error to have denied further discovery. See Nicholas v. Wallenstein, 266 F.3d 1083, 1088-89 (9th Cir.2001); id. at 1089 (Tashima, J., concurring); Applied Info. Sci. Corp. v. eBAY, Inc., 511 F.3d 966, 969 n. 1 (9th Cir.2007) (plaintiff did not make clear on appeal how additional time to file its brief opposing summary judgment would have precluded summary judgment).
Last, plaintiff contends he should have been permitted discovery as to contact information for putative class members. However, since plaintiff lacked standing when the case was first brought, *820dismissal could not have been avoided by substituting a different named plaintiff. It was not error to deny such discovery. See Lierboe, 850 F.3d at 1023; Blackwell, 245 F.R.D. at 463.
AFFIRMED.