¶1In this appeal from a conviction of malicious destruction of property valued at over $250, we consider the proper method for determining “the value of the property so *212destroyed or injured,” G. L. c. 266, § 127, proof of which is an essential element of. this felony offense.
¶2The defendant’s conviction was affirmed on appeal. Commonwealth v. Deberry, 57 Mass. App. Ct. 93 (2003). The Appeals Court concluded that, to determine the “value of the property” damaged, the jury should consider the value of the house, of which the wall was “inextricably integrated.” Id. at 97. We granted the defendant’s application for further appellate review.
¶3Where only a portion of property has been damaged, it is possible to consider three definitions for the “value of property”: the fair market value of the whole property (here the house) (as the Commonwealth urges); the fair market value of so much of the property as is destroyed or injured (here the wall) (as the defendant urges); or the pecuniary loss (here measured by the reasonable cost of repair) (as most other States *213do). We conclude, consistent with our duty to construe ambiguous terms in light of the Legislature’s probable intent, that where damage is caused to a portion of the property as a whole and may be replaced or repaired, the value of the property is to be measured by the pecuniary loss, in this case the reasonable cost of repair necessitated by the malicious conduct. Because the Commonwealth presented no evidence on this point, the defendant’s conviction of the felony offense of malicious destruction of property must be reversed.
¶41. Background. On June 20, 2000, the defendant was tried in Brockton District Court on one count of assault and battery in violation of G. L. c. 265, § 13A, one count of malicious destruction of property over $250 in violation of G. L. c. 266, § 127 (felony), and two counts of malicious destruction of property under $250 in violation of G. L. c. 266, § 127 (misdemeanor). After a one-day jury trial, at which the Commonwealth presented the testimony of one witness
¶5Reviewing the record in its light most favorable to the Commonwealth, Commonwealth v. Latimore, 378 Mass. 671, 676-677 (1979), we recite the facts that a reasonable jury could have found. On August 4, 1999, the witness was at her mother’s house with the defendant and their one year old daughter. While the defendant and the witness were sitting outside, the telephone rang. The witness, with the defendant following, walked through the kitchen and into the living room to answer the telephone, which had a caller identification display. The witness spoke for *214some minutes to the caller, a man whom the witness had met previously. During and after the conversation, the defendant asked her to identify the caller. The witness testified that she initially lied to the defendant regarding the caller’s identity, but eventually told him that it was another man.
¶6An argument ensued. As the exchange became heated, the 1 defendant ripped the kitchen telephone from the wall and broke it. He then punched a hole in the wall.
¶7The witness testified that the kitchen telephone was worth approximately twenty dollars, the living room telephone was worth approximately sixty dollars, and the pager was a gift. The Commonwealth offered no evidence concerning the value of the damaged kitchen wall or of the house itself, or of the cost to repair the damaged wall. The defendant moved unsuccessfully for required findings of not guilty based on insufficient evidence at the close of the Commonwealth’s case and at the close of the evidence.
¶8Concerning the damage to the wall, the judge instructed the jury:
“[T]he value of the property, not the value of the damage, but the value of the property, was [it] in excess of $250[?] . . . You’re looking at the value of the wall, not the alleged damage, the hole in it, was the item damaged worth over $250[?] If you find the first three elements [of malicious destruction of property] are proven, then you go on to determine whether or not it was over $250 for that particular charge. . . . [T]he allegation that there was damage to a phone, damage to a pager, the allegation [as to those] is under $250, so you don’t have to make a determination with regard to amount.”
¶9Neither the defendant nor the Commonwealth objected to the judge’s instructions.
¶10*2152. Malicious destruction of property. The element of the offense of malicious destruction of property that distinguishes a misdemeanor from a felony is the “value of the property so destroyed or injured.” G. L. c. 266, § 127.
¶11As we discuss more fully below, amendments to the statute in 1978 expanded personal property covered by the statute to encompass real property, i.e., “dwelling house” or “building.” See St. 1978, c. 544 (1978 act). The question we must therefore resolve is whether, when the Legislature amended G. L. c. 266, § 127, it intended that every “injury” to a dwelling house or building, no matter how minimal (breaking a small pane of glass, scratching a wall) would support a felony conviction resulting in up to ten years’ imprisonment or a fine of up to three times the value of the building, when the cost of repair or replacement might be substantially less than $250.
¶12We interpret a statute “according to the intent of the Legislature ascertained from all its words construed by the ordinary and approved usage of the language ... to the end that the purpose of its framers may be effectuated.” Hanlon v. Rollins, 286 Mass. 444, 447 (1934). Accord Boston Police Patrolmen’s Ass’n v. Boston, 435 Mass. 718, 719-720 (2002). Where the statutory language is not conclusive, we may “turn to extrinsic sources, including the legislative history and other statutes, for assistance in our interpretation.” Chandler v. County Comm’rs of Nantucket County, 437 Mass. 430, 435 (2002), citing EMC Corp. v. Commissioner of Revenue, 433 Mass. 568, *216570-571 & nn.6-8 (2001) (other statutes), and Barclay v. De-Veau, 384 Mass. 676, 680 (1981) (legislative history). If it is a criminal statute we interpret, the rule of lenity requires that the defendant be given the benefit of the ambiguity. Commonwealth v. Roucoulet, 413 Mass. 647, 652 (1992).
¶13Before turning to the 1978 act, we examine the legislative history of crimes against property in Massachusetts, paying particular attention to the evolution of the statutory offenses pertaining to buildings. Chapter 266 of the General Laws, “crimes against property,” contains more than one hundred separate offenses.
¶14*217In 1862, the Legislature enacted a separate statute prohibiting the “injury” of a “dwelling-house or other building.”
¶15The 1978 act was enacted in the wake of a lengthy report by the Legislative Research Council on the prevention and punishment of vandalism in the Commonwealth. See 1976 House Doc. No. 4951 (report).
¶16The 1978 act simply extended the scope of the existing statute to encompass real property. Nothing in the legislative history suggests that the Legislature intended that any damage (vandalism) to a building, however minuscule, be prosecuted as a felony. To the contrary, the fact that the Legislature folded “dwelling house[s]” and “building[sj” into the catchall provision of § 127 suggests the Legislature’s intention that a grading approach be utilized for considering whether to charge a misdemeanor or a felony for damage to real property. This was, after all, the practice across the United States as described in the report of the Legislative Research Council. Id. at 34-47. Thus we are unable to conclude that the 1978 act intended to *219exclude damage to real property from such grading.
¶17We must therefore construe statutory terms to effectuate the legislative purpose as we determine it. See Hanlon v. Rollins, 286 Mass. 444, 447 (1934). The report, which appears to have triggered the 1978 act, strongly suggested that Massachusetts was out of step with the majority of other States, which had enacted some type of grading of penalties depending on the seriousness of the “vandalism” to real property that did not amount to total destruction of the property. See report at 34-47. However, nothing in the report suggests that minor property damage should be met with Draconian punishment. Nor is there any indication that the Legislature intended that the most minimal damage to real property, perhaps costing a few dollars to repair, would subject a defendant to a felony conviction with attendant severe punishment of up to ten years or a substantial fine. Cf. Commonwealth v. Walden, 3 Cush. 558, 559-560 (1849) (malicious destruction statute requires heightened level of malice lest “a person ... be punished criminally, and with great severity,” “however trifling the injury might be”). In addition, the Legislature clearly was aware, in 1978, that the total value of almost any “building” or “dwelling house” then exceeded $250. Had the Legislature meant “value” under the 1978 act to include the total value of any real property that suffered even minor damage, it would have said so explicitly, rather than adopting an amendment containing a misdemeanor *220provision that, as pertains to real property, would be virtually meaningless.
¶18We thus reject the Commonwealth’s contention that the value at issue is the value of the whole property. In this regard we find persuasive the reasoning of the District of Columbia Court of Appeals. That court also rejected an interpretation of its malicious destruction statute, a statute similar to ours, that would have interpreted the “value” of the property to mean the value of the entire property, damaged and undamaged parts alike.
¶19*221Here, the defendant argues that the property to be valued is the wall, and not the entire house.
¶20As the District of Columbia court noted, “[a] more sensible approach is wholly consistent with the statute.” Nicholsv. United States, supra at 342. We agree, and conclude that the correct standard in a case such as this is the pecuniary loss: “Where repairable damage or destruction is caused to a portion or portions of a greater whole, the value of the property damaged or destroyed is to be measured by the reasonable cost of *222the repairs necessitated by the malicious conduct.”
¶21Our survey of other jurisdictions confirms our conclusion. Although other States employ a variety of statutory terms to distinguish felony and misdemeanor destruction of property offenses, no jurisdiction determines whether a criminal mischief or destruction of property offense is a misdemeanor or a felony on the basis of the value of the property determined as a whole. Most jurisdictions differentiate the offense level by a discemable monetary amount, such as “pecuniary loss” used in the Model Penal Code,
¶22Applying the above statutory interpretation of “value” in this case, we reverse the felony conviction of malicious destruction of property, G. L. c. 266, § 127.
¶233. The defendant’s prior convictions. Prior to trial, the judge denied the defendant’s motion in limine to exclude the introduction at trial, for impeachment purposes, of the defendant’s prior convictions of assault by means of a dangerous weapon and of unlawful possession of á firearm.
¶24“Generally, in order for the prejudicial effect to outweigh the probative value of the prior conviction evidence, the ‘prior conviction must be substantially similar to the charged offense.
¶25Commonwealth v. Paulding, 438 Mass. 1, 12 (2002), quoting Commonwealth v. Leftwich, 430 Mass. 865, 869 (2000). Whether to admit such evidence is appropriately an exercise of discretion by the trial judge. For the reasons stated by the Appeals Court, Commonwealth v. Deberry, 57 Mass. App. Ct. 93, 99 (2003), we conclude that, in this case, the trial judge did not abuse her discretion in denying the defendant’s motion.
¶26The defendant also argues that, by denying his motion to exclude his prior convictions, the judge denied him his constitutional right to testify in his own defense because those prior convictions could be used to impeach his testimony. As the Appeals Court correctly stated, “[t]he argument is unpersuasive and wrong. The defendant has a right to testify. He does not have a right to testify free of the effects of impeachment by prior conviction.” Commonwealth v. Deberry, supra,citing G. L. c. 233, § 21.
¶274. Conclusion. The convictions of the two misdemeanor offenses of malicious destruction of property are affirmed. For the foregoing reasons, the judgment on the defendant’s conviction of malicious destruction of property over $250 is reversed, the verdict set aside, and the case is remanded to the District Court, where a finding of guilty of the lesser included offense of malicious destruction of property under $250 is to enter. The defendant is to be sentenced pursuant to those provisions of G. L. c. 266, § 127, that pertain to the misdemeanor offense.
¶28So ordered.
¶29General Laws c. 266, § 127, as amended through St. 1994, c. 168, § 4, provides, in pertinent part: “Whoever destroys or injures the personal property, dwelling house or building of another in any manner or by any means not particularly described or mentioned in this chapter shall, if such destruction or injury is wilful and malicious, [be guilty of a felony]; if the value of the property so destroyed or injured is not alleged to exceed two hundred and fifty dollars, [the offender shall be guilty of a misdemeanor].”
¶30A person convicted of the felony of malicious destruction of property under G. L. c. 266, § 127, shall “be punished by imprisonment in the state prison for not more than ten years or by a fine of three thousand dollars or three times the value of the property so destroyed or injured, which ever is greater.” A misdemeanor conviction of malicious destruction of property carries a penalty of three times the value of the damage or injury to such property or a maximum imprisonment for two and one-half months.
¶31At the time of trial, the witness was the defendant’s girl friend.
¶32In addition to the testimony of the witness, the Commonwealth introduced in evidence photographs of a kitchen telephone, a kitchen telephone jack pulled from the wall, a cordless telephone, a pager, and a photograph of the hole in the kitchen wall.
¶33As to the two misdemeanor charges of malicious destruction of property valued at under $250, the defendant does not contend that the Commonwealth failed to satisfy its burden of proving each of the required elements but limits his appeal to a claim that the judge erred in denying his motion in limine to exclude certain prior convictions. We consider these claims infra.
¶34The witness did not testify as to the size of the hole in the wall, but a photograph in evidence shows a hole that is slightly larger than the light switch plate next to it.
¶35The felony offense of malicious destruction of property valued at over $250 has four essential elements, which must be proved beyond a reasonable doubt: the defendant injured or destroyed the personal property, or dwelling house or building of another; the defendant did so wilfully; the defendant did so with malice; the value of the property so injured or destroyed exceeded $250. See, e.g., Instruction 5.301 of the Model Jury Instruction for Use in the District Court (1995).
¶36For example, G. L. c. 266 contains the following sections relating to the destruction of specific items of property by means other than arson: § 28 (motor vehicle or trailer); § 94 (boundary markers); § 95 (historical monuments); § 96 (State buildings); § 97 (county buildings); § 98 (schoolhouse or church); § 98A (public park or playground equipment); § 100 (library material or property); § 104 (building or dwelling house); § 104A (goal posts on a football field); § 104B (research animals); § 105 (stone walls or fences); § 108 (ship or vessel); § 112 (livestock); § 114 (produce, fences, and breaking glass in a building); § 125 (show bill or advertisement posted on a structure); § 126A (real or personal property of another); § 127A (place of worship); § 128 (milk cans); § 129 (property of the Commonwealth by an inmate of a correctional facility); § 133 (property of Humane Society); § 138A (irrigation equipment);'and § 139 (identifying numbers on motor vehicles or trailers).
¶37“Every person, who . . . shall wilfully and maliciously destroy or injure the personal property of another person, in any manner or by any means, not particularly described or mentioned in this chapter, shall be punished by imprisonment in the state prison for not more than five years, or by fine not exceeding one thousand dollars and imprisonment in the county jail, not more than one year.” R.S. (1836), c. 126, § 39.
¶38“Every person who shall wilfully and maliciously destroy or injure the personal property of another person, in any manner or by any means, not particularly described or mentioned [herein], shall, when the value of the *217property so destroyed or injured or the injury occasioned to the same, shall not be alleged to exceed the sum of fifteen dollars, be punished by imprisonment in the county jail or house of correction not more than thirty days, or a fine not exceeding fifteen dollars.” St. 1846, c. 52, § 1.
¶39When the General Statutes were republished in 1860, the precursor to G. L. c. 266, § 127, the distinction between a felony and misdemeanor offense was based on the “value of the property so destroyed or injured.” Gen. Stat. 1860, c. 161, § 85. The additional language concerning “the injury occasioned to the same” was omitted. Compare St. 1846, c. 52, § 1, with Gen. Stat. 1860, c. 161, § 85.
¶40Statute 1862, c. 160, is now codified at G. L. c. 266, § 104, a misdemeanor offense that provides that “[wjhoever wilfully, intentionally and without right destroys, injures, defaces or mars a dwelling house or other building, whether upon the inside or outside, shall be punished by imprisonment for not more than two months or by a fine of not more than fifty dollars.” The statute has remained essentially unchanged since 1862, with the exception that in 1901 the word “maliciously” was deleted from the statute. St. 1901, c. 268, § 5.
¶41The 1978 act also increased the minimum amount required for a felony conviction from fifteen dollars to one hundred dollars. St. 1978, c. 544. Since 1846, the Legislature has twice amended the minimum amount that must be alleged for a felony charge. As noted, the amount was increased to one hundred dollars in 1978, and then to $250 in 1987. St. 1987, c. 468, § 5.
¶42This study ordered by the House of Representatives and Senate expressly directed the Legislative Research Council (council) “to consider, among other things, the adequacy of penalties now prescribed by the laws of the Commonwealth for acts of vandalism.” 1976 House Doc. No. 4951, at 2. The report, prepared for the council by the Legislative Research Bureau (bureau), made no recommendations of legislative proposals; the transmittal letter to the *218Senate and House of Representatives noted that the bureau was limited by statute to “statistical research and fact finding.” Id. at 6.
¶43The summary of the report noted, for example, that in the 1972-1973 school year the nation’s public school systems expended approximately $260 million for “vandalism damage, arson losses and similar property damage.” Id. at 9.
¶44While the primary focus of the report was the cost of vandalism to schools and other public buildings, the report also discussed vandalism to private buildings.
¶45The report further recognized that, in 1971, such a graded system had been recommended by the Massachusetts Criminal Law Revision Commission’s (commission’s) proposed simplification of the criminal mischief statutes. Id. at 52-54. The commission’s recommendation, acknowledged and reprinted in the legislative report, was to consolidate the approximately forty-five property destruction statutes into three statutes, each with different offense levels based on the amount of damage. Id.
¶46One sentence, inserted by the 1978 act, provides that, “where the value of the property so destroyed or injured” is less than $250, the defendant may be sentenced to pay a fine of “three times the value of the damage or injury to such property.” The judge is instructed, in such cases, to hold a postconviction evidentiary hearing concerning the “value of the property so destroyed or injured.” In addition to highlighting ambiguities in the drafting of the 1978 act, these provisions suggest that the Legislature was concerned to ensure that the victim is compensated reasonably (for “damage”) and does not reap a windfall from the defendant’s misdeeds.
¶47We find added support for this conclusion from G. L. c. 266, § 127A, establishing penalties for destruction of specific types of buildings, such as churches, synagogues, schools, educational facilities, and community centers. That statute, inserted by St. 1983, c. 165, § 2, also distinguishes felonies and misdemeanors by a monetary amount, stating that “if the damage to or loss of such property exceeds five thousand dollars” it is a felony punishable by imprisonment for not more than five years. Section 127A prohibits “willful[]” conduct, and not “malicious” conduct. Under that statute, damage exceeding $5,000 carries a maximum penalty of five years in State prison. It would be illogical for the Legislature to set a lower punishment in a specific statute for offenses against public buildings that are frequent targets of vandalism than is provided by the catchall provision of § 127 for dwelling houses and buildings in general.
¶48The statute, D.C. Code § 22-403 (1973), established a felony offense for the destruction or injury of “any public or private property, whether real or personal, not his own, of the value of $200 or more” and a misdemeanor offense “if the value of the property be less than $200.” Nichols v. United States, 343 A.2d 336, 341 (D.C. 1975). This provision is now codified at D.C. Code § 22-303 (2001).
¶49The defendant did not argue that the cost of repair was the proper method of valuation, possibly relying on Commonwealth v. Pyburn, 26 Mass. App. Ct. 967, 969 (1988), and Commonwealth v. Lauzier, 53 Mass. App. Ct. 626, 632-633 & n.8 (2002) (valuation issue not raised below and thus waived), to the effect that the cost of the damage was not a proper consideration. The Pybum central holding, that valuation exceeding $250 is not an essential element of the malicious destruction offense, has been overruled. Commonwealth v. Beale, 434 Mass. 1024, 1025 (2001). Commonwealth v. Pyburn, supra,also incorrectly stated that the judge erred when instructing the jury that the Commonwealth must prove beyond a reasonable doubt “that the value of the property damage exceeded one hundred dollars.” We note that neither the defendant nor the Commonwealth sought further appellate review in that case.
¶50To the extent that the defendant relied on prior case law that we now overrule, we do not consider him to have waived this argument.
¶51Of course, in certain circumstances a seemingly minor type of damage may effectively destroy the value of an entire property, such as a tear in a valuable painting or a chip in an antique cup.
¶52The various decisions of the Appeals Court that touch on this question are not inconsistent with our ruling. Where property has been only partially damaged, the Appeals Court has either measured the “value” of property by damage or cost of repair, see, e.g., Commonwealth v. Ruddock, 25 Mass. App. Ct. 508, 512 (1988) (evidence introduced of cost of repair of automobile dented by student protestor, not value of automobile); Commonwealth v. Peruzzi, 15 Mass. App. Ct. 437, 439 (1983) (evidence introduced of cost of repair, not value of automobile), or declined to reach the question, see Commonwealth v. Walters, 12 Mass. App. Ct. 389, 394 n.4 (1981) (declining to decide whether value of damage to personal property or value of property itself that must exceed $250); see also Commonwealth v. Cimino, 34 Mass. App. Ct. 925, 927-928 (1993) (injury confined to automobile windows damaged by shots from BB gun; felony sentences vacated and automobile’s value as whole not considered). In Commonwealth v. Pyburn, 26 Mass. App. Ct. 967, 968 (1979), the Appeals Court stated that it was error to admit “an itemized bill of an estimate of repairs” because “[ejvidence of the amount of damage to the automobile was immaterial.” The damaged property at issue in that case was an automobile, which the defendant (driving a large payloader with a front bucket) scooped into the air and “placed roughly” on the ground, damaging the entire structure of the automobile. Id.As the Appeals Court later noted: “We do not think Pybum is to be so broadly construed as setting a per se rule of total valuation applicable to all cases irrespective of the scope of the damage. Rather a total valuation method was applied in Pybum precisely because the damage [to the automobile] was all encompassing.” Commonwealth v. Deberry, 57 Mass. App. Ct. 93, 96 (2003). As noted, Pybum was overruled in part on different grounds by Commonwealth v. Beale, 434 Mass. 1024, 1025 (2001).
¶53Section 220.3(2) of the Model Penal Code (1985) states, in part, “[criminal mischief is a felony of the third degree if the actor purposely causes pecuniary loss in excess of $5,000 . . .. It is a misdemeanor if the actor purposely causes pecuniary loss in excess of $100, or a petty misdemeanor *223if he purposely or recklessly causes pecuniary loss in excess of $25. Otherwise criminal mischief is a violation.”
¶54Section 97-17-67(3) of Miss. Code Ann. (LexisNexis Supp. 2003) states, in pertinent part: “If the value of the property destroyed, disfigured or injured is in excess of Five Hundred Dollars ($500.00), it shall be a felony punishable by a fine not exceeding Ten Thousand Dollars ($10,000.00) or imprisonment in the Penitentiary not exceeding five (5) years, or both.”
¶55Statute 1904, c. 305, established the offense of wanton destruction of property, which is not a lesser included offense of malicious destruction of property, and must be separately charged. Commonwealth v. Schuchardt, 408 Mass. 347, 351-352 (1990) (wanton destruction of property requires that likely effect of conduct was substantial harm, an element not required for conviction of malicious destruction of property). Because the value of the property must be proved beyond a reasonable doubt to sustain a conviction of both property offenses, our holding in this case applies also to the felony offense of wanton destruction of property.
¶56The defendant states that two of his prior convictions were of assault and battery by means of a dangerous weapon. The Commonwealth responds that those prior convictions were of assault by means of a dangerous weapon. At the hearing on the motion, counsel for both the defendant and the Commonwealth refer to the charges as assault by means of a dangerous weapon. The record does not include the defendant’s criminal history and the written motion included in the record does not describe the convictions at issue. For the purposes of reviewing the judge’s ruling on this matter, we rely on the description of the prior convictions presented to the judge by counsel — that the convictions were for assault by means of a dangerous weapon.