The plaintiff brought this action to recover damages for harm resulting from his defendant neighbor’s interference with the flow of water from his property.2 The defendant appeals from a denial of his motions for a directed verdict and of his motion for a judgment notwithstanding the verdict.3 He also claims that a judge in the Superior Court erred in allowing the plaintiff to give opinion testimony as to damage; that error was committed in adding prejudgment interest to the verdict; and that it was error to hold him individually liable for his acts as trustee of the PMG Realty Trust. We affirm.
1. Motions for a directed verdict and for judgment notwithstanding the verdict. The same standard applies to both a motion for judgment notwithstanding the verdict and a motion for a directed verdict. Service Publications, Inc. v. Goverman, 396 Mass. 567, 571 (1986). Curtiss-Wright Corp. v. Edel-Brown Tool & Die Co., 381 Mass. 1, 3-4 (1980). “If, upon any reasonable view of the evidence, there is found a combination of facts from which a rational inference may be drawn in favor of the plaintiffs, there was an issue for decision by the jury and the motions were properly denied.” Chase v. Roy, 363 Mass. 402, 404 (1973). Curtiss-Wright Corp. v. Edel-*521Brown Tool & Die Co., supra at 4. “It is axiomatic that, in reviewing the denial of the defendant’s motions for directed verdict and judgment notwithstanding the verdict, we will construe the evidence most favorably to the plaintiff and disregard that favorable to the defendant.” Cimino v. Milford Keg, Inc., 385 Mass. 323, 326 (1982).
We summarize the evidence in a light most favorable to the plaintiff.
Witold K. Von Henneberg (Henneberg) purchased a one-acre lot on Edmands Road in Framingham from Philip Weir in 1957. Weir owned the adjacent undeveloped back lot, access to which was gained by a forty-foot strip of land which ran along the side of the plaintiff’s property. Henneberg’s land sloped downward toward the back lot so that water from Henneberg’s property drained onto the access strip and flowed to Weir’s back lot. In 1972, Weir built an earthen driveway on the access strip, which blocked the flow of the water and caused it to remain on Henneberg’s land. After Henneberg complained about this flooding problem, Weir dug a drainage trench along the border of the two lots so that the water flowed from Henneberg’s property onto the driveway and into the drainage trench.
In 1979, Weir sold the back lot to the defendant Generazio.
Three days later Generazio conveyed the property to the PMG Realty Trust for $100. Generazio was the trustee and sole shareholder of the PMG Realty Trust. In 1980, Generazio began constructing a single-family dwelling on the back lot. He raised and paved the driveway, filled in the drainage trench, and built a berm which prevented water from flowing off Hen-neberg’s land. Whenever there is a heavy rainfall, water floods one-third of Henneberg’s property, endangering Henneberg’s septic system. Photographs showing the flooded areas of the plaintiff’s property were before the jury. There was evidence that, although Generazio was aware of these conditions, he made no effort to rectify them, as had Weir.
The evidence created a question of fact for the jury as to whether Generazio acted unreasonably in the circumstances. In Tucker v. Badoian, 376 Mass. 907 (1978), a majority of *522the Justices announced prospectively, in a concurring opinion written by Justice Kaplan, that the “reasonable use” standard would govern water diversion cases. “[E]ach possessor is legally privileged to make a reasonable use of his land, even though the flow of surface waters is altered thereby and causes some harm to others, but incurs liability when his harmful interference with the flow of surface waters is unreasonable.” Tucker v. Badoian, supra at 917 n.2. (Kaplan, J., concurring), quoting Armstrong v. Francis Corp., 20 N.J. 320, 327 (1956). Jacobs v. Pine Manor College, 399 Mass. 411, 416 n.9 (1987).
The issue of reasonableness is “a question of fact to be determined in each case upon a consideration of all the relevant circumstances, including such factors as the amount of harm caused, the foreseeability of the harm which results, the purpose or motive with which the possessor acted, and all other relevant matter.” Tucker v. Badoian, supra at 918 n.2. (Kaplan, J., concurring), quoting Armstrong v. Francis Corp., supra at 330. Butler v. Bruno, 115 R.I. 264, 272 (1975).
The defendant contends that as matter of law his actions do not fall under conduct governed by the reasonable use standard.4 He argues that the reasonable use standard applies only to damage caused by water flowing from one landowner’s property onto another landowner’s property. Because he prevented water from flowing off Henneberg’s property and did not discharge water onto Henneberg’s property, Generazio reasons, he cannot be liable for the harm caused under the reasonable use doctrine.
*523The defendant misunderstands the reasonable use doctrine. Under the reasonable use doctrine, a landowner can be held liable for the discharge of water onto another’s land or for the blockage of water from another’s land. The landowner “incurs liability when his harmful interference with the flow of surface waters is unreasonable” (emphasis added). Tucker v. Badoian, supra at 918 n.2 (Kaplan, J., concurring), quoting Armstrong v. Francis Corp., supra at 327.
It is noteworthy that the concurring opinion in Tucker relied on two cases with facts very similar to those of the present case. In Pendergrast v. Aiken, 293 N.C. 201 (1977), the defendants blocked a stream which ran downhill from the plaintiffs’ property through the defendants’ property, causing flooding on the plaintiffs’ property. In Butler v. Bruno, supra the defendant, whose land was adjacent to and below that of the plaintiffs, built a retaining wall along the property line, which blocked the drainage and flooded the plaintiffs’ land. In both cases, the court adopted the reasonable use doctrine, holding that the evidence presented a question to be determined by the trier of fact. Other jurisdictions have applied the reasonable use doctrine to similar fact patterns. See, e.g., Rodrigues v. State, 52 Hawaii 156 (1970); Mulder v. Tague, 85 S.D. 544 (1971).
The defendant contends that construction of a single-family dwelling constitutes reasonable use per se, and thus cannot result in liability. Under the Tucker standard, the fact finder must view the landowner’s activity on his land with an eye toward the effect of that activity on the flow of surface waters. If the fact finder, after taking into account all of the relevant factors, finds that the possessor acted unreasonably, the nature of the original activity alone, whether it be constructing a shopping mall or building a single-family dwelling, will not bar liability.
Here, there was ample evidence to support a finding that the defendant acted unreasonably. Accordingly, the judge properly denied the defendant’s motions for a directed verdict and for judgment notwithstanding the verdict.
*5242. Damages. The defendant argues that the trial judge improperly admitted Henneberg’s testimony as to damages. “An owner of property familiar with it and its uses and characteristics may testify as to its value. Rubin v. Arlington, 327 Mass. 382, 384 (1951). Evaluation of the witness’ familiarity, knowledge, and experience is for the trial judge and his decision is ‘conclusive unless upon the evidence it [is] erroneous as matter of law.’ Id.” Larabee v. Potvin Lumber Co., 390 Mass. 636, 643 (1983). Blais-Porter, Inc. v. Simboli, 402 Mass. 269, 272-273 (1988). See P.J. Liacos, Massachusetts Evidence 118-119 (5th ed. 1981 & Supp. 1985).
The judge was well within his discretion to conclude that the plaintiff was sufficiently familiar with his land to testify as to its value. The judge did not presume familiarity from the fact of ownership alone. See Blais-Porter, Inc. v. Simboli, supra at 272. Henneberg, a professional architect, was not a mere holder of title or absentee landowner. He had cleared the land after purchasing it in 1957, had transformed a half-destroyed farmhouse into a family home, and had lived there for twenty-eight years. Henneberg demonstrated a detailed knowledge of his land in his trial testimony.
After the judge found that Henneberg was qualified to testify on the question of damages, the plaintiff was free to give his opinion of the value of the damaged property. Once a foundation for opinion testimony is properly laid, it is left to the fact finder to assess the weight and credibility of the testimony in reaching a final determination of damages. Patch v. Boston, 146 Mass. 52, 57 (1888). The defendant’s attempt, on cross-examination, to discredit Henneberg’s method of reaching his dollar figure did not affect Henneberg’s established competence to give his opinion. The fact that the plaintiff placed a value on the affected one-third of his land, rather than giving an opinion as to the lesser value of the whole land, is not fatal. The jury had other evidence of damages before them.5 The *525value of a house lot such as the plaintiff’s ($150,000) was before the jury. The jury could well have interpreted the plaintiff’s testimony as evidence of a diminution of value of the entire lot as a result of the defendant’s acts. See Larabee v. Potvin Lumber Co., supra. See also Willey v. Cafrella, 336 Mass. 623, 624 (1958).6
3. Individual liability. Under G. L. c. 203, § 14A (1986 ed.), “[a] trustee shall be personally liable ... for torts committed in the course of administration of the trust estate only if he was personally at fault.” Generazio’s unreasonable interference with surface waters constituted a private nuisance. Triangle Center, Inc. v. Department of Pub. Works, 386 Mass. 858, 863 (1982). Restatement (Second) of Torts § 833 (1979). A private nuisance is a “tort" under G. L. c. 203, § 14A. See Triangle Center, Inc. v. Department of Pub. Works, supra; Tucker v. Badoian, 376 Mass. 907, 917 (1978) (Kaplan, J., concurring); Pendergrast v. Aiken, supra at 216; Butler v. Bruno, 115 R.I. 264, 272 (1975). See also W. Prosser & R. Keeton, Torts §§ 87-88 (5th ed. 1984). There is no question that Generazio personally conducted the construction activities which led to the flooding of the plaintiff’s property. It follows that Generazio may be held personally liable as a trustee for the damage resulting from his unreasonable interference with his neighbor’s surface water.
4. Prejudgment interest. We reject Generazio’s argument that Henneberg’s damages should not have included prejudgment interest under G. L. c. 231, § 6B (1986 ed.). As we have indicated, the essence of this action is that it sounds in tort. General Laws c. 231, § 6B, clearly applies by its language: “In any action in which a verdict is rendered or a finding made or an order for judgment made for pecuniary damages ... for damage to property, there shall be added by the clerk of court *526to the amount of damages interest thereon at the rate of twelve per cent per annum from the date of commencement of the action even though such interest brings the amount of the verdict or finding beyond the maximum liability imposed by law.” Additionally, the remittitur cured any potential error. While the original judgment was for $33,500 plus $22,143.50 in prejudgment interest, now the judgment is just under $28,000.
Judgment affirmed.
The plaintiff sued Generazio individually and as trustee of PMG Realty Trust. The plaintiff’s complaint also contained a count for negligence and a count alleging violation of G. L. c. 93A (1986 ed.). The negligence count was disposed of at trial by the allowance of the defendant’s motion for a directed verdict; the c. 93A count resulted in a summary judgment for the defendant. We consider only the count which went to the jury and which resulted in a verdict and a judgment for the plaintiff.
The jury returned a verdict in the amount of $33,500, to which the clerk of the court added interest in the amount of $22,143.50. The judge allowed Generazio’s motion for a new trial, unless Von Henneberg accepted a remittitur. Von Henneberg accepted the remittitur which reduced the final award to $16,750, plus $11,071.95 in interest. Final judgment was entered on May 11,1987, in favor of Von Henneberg and against Generazio individually and as trustee of the PMG Realty Trust.
Because the defendant failed to object to the judge’s charge to the jury, the standard enunciated by the judge became the law of the case. See Brady v. Nestor, 398 Mass. 184, 191 (1986) (Hennessey, C.J., dissenting). The validity of the judge’s charge thus is not an issue before us. We recognize that this does not preclude the defendant from arguing that his motions for a directed verdict (made at the conclusion of the plaintiff’s case and at the conclusion of the trial) should have been allowed. Tucker v. Badoian, supra 915-916. We note, however, that the judge in this case correctly charged the jury in accordance with the Tucker standard. We read Justice O’Connor’s dissent to express no disagreement with the validity of the charge as given, but only to express disagreement with our view that the evidence was sufficient to warrant the jury’s verdict.
There was other evidence as to damage, e.g., photographs showing the flooding of a portion of the plaintiff’s land; testimony as to the danger caused by the flooding to the plaintiff’s septic tank and leaching field; *525evidence as to the creation of a swampy area on part of the plaintiff’s land; and evidence of the unsightliness of the affected area.
The defendant offered no evidence of value. The plaintiff testified that the value of the affected area was $50,000. The jury verdict was in the amount of $33,500. We note also that the issue of mitigation was put to the jury by the judge’s charge.