v. Sears, Roebuck & Co., 374 Mass. 739, 740 (1978). In making this determination, this court has been guided by the basic principle that “ ‘a cause of action accrues on the happening of an event likely to put the plaintiff on notice.’ Hendrickson v. Sears, 365 Mass. 83, 89-90 (1974), and cases cited.” Franklin v. Albert, supra at 618. In negligence cases the general rule has been that the cause of action accrues at the time of injury. Cannon, supra at 741. Frank Cooke, Inc. v. Hurwitz, 10 Mass. App. Ct. 99, 106 (1980). See J.R. Nolan, Civil Procedure § 319, at 32 (Supp. 1981).
If the plaintiffs’ causes of action in negligence accrued in 1975 (when they moved into their apartments), their action, brought in 1980, is barred by G. L. c. 260, § 2B. To avoid this result, the plaintiffs seek to bring themselves within the so called discovery rule under which certain causes of action based on inherently unknowable wrongs do not accrue until the plaintiff learns, or reasonably should have learned, that he has been harmed by the defendant’s conduct. This rule has been applied in a variety of settings. See, e.g., Franklin v. Albert, supra (medical malpractice); Friedman v. Ja-blonski, 371 Mass. 482 (1976) (deceit in sale of real estate); Hendrickson v. Sears, 365 Mass. 83 (1974) (negligent certification of title to real estate by attorney).
The language of G. L. c. 260, § 2B, clearly establishes some variant of the discovery rule for design and construction negligence cases. See Hendrickson v. Sears, supra at 89. We think the judge correctly held, however, that delayed discovery principles are not involved in this case. The plaintiffs admitted at oral argument and reiterate in their brief in this court that the building planned and constructed by the defendants was “plagued with serious leakage from its inception.” This situation was sufficient to put them on notice that they were being injured.
The plaintiffs argue that their causes of action did not accrue until July, 1980, when “the cause of [and] cure for” the leaks had been “finally determined” by the BHA and the BHA had reported its findings to the plaintiffs’ attorney.