The decision of the BTA is unreasonable and unlawful, and it is reversed.
The BTA, citing Alcan Aluminum Corp. v. Limbach (1989), 42 Ohio St.3d 121, 537 N.E.2d 1302, and Alliance Towers, Ltd. v. Stark Cty. Bd. of Revision (1988), 37 Ohio St.3d 16, 523 N.E.2d 826, stated:
“The Board of Revision’s determination of value of real property is presumptively correct.”
The BTA has misinterpreted those cases. We have previously disabused the BTA regarding its conclusion that “ * * * ‘the board [of revisiones finding of value is entitled to a presumption of validity.’ ” Springfield Local Bd. of Edn. v. Summit Cty. Bd. of Revision (1994), 68 Ohio St.3d 493, 494, 628 N.E.2d 1365, 1366. In Springfield Local, we rejected the BTA’s insistence that R.R.Z. Assoc. v. Cuyahoga Cty. Bd. of Revision (1988), 38 Ohio St.3d 198, 202, 527 N.E.2d 874, 878, and Mentor Exempted Village Bd. of Edn. v. Lake Cty. Bd. of Revision (1988), 37 Ohio St.3d 318, 319, 526 N.E.2d 64, 65, support this conclusion. Also, in Springfield Local, we deflected support for this conclusion from Alliance Towers, Ltd., supra, stating that that case “dealt with the requirement that a board of revision ‘perform its duty in good faith and in the exercise of sound judgment’ [and that] * * * [t]he good faith and sound judgment questions in that case involved an administrative action, not a quasi-judicial valuation of the board of revision.” Springfield Local, 68 Ohio St.3d at 495, 628 N.E.2d at 1366-1367.
Moreover, Alcan Aluminum, supra, does not establish the proposition attributed to it by the BTA. Rather, Alcan Aluminum, a franchise tax case, was concerned with the Tax Commissioner’s finding that the involved property was physically located in Ohio. In Alcan Aluminum, supra, 42 Ohio St.3d at 123, 537 N.E.2d at 1304, we said:
“Absent a demonstration that the commissioner’s findings are clearly unreasonable and unlawful, they are presumptively valid. Furthermore, it is error for the BTA to reverse the commissioner’s determination when no competent and probative evidence is presented to show that the commissioner’s determination is factually incorrect.”
*574While a determination of the true value of real property by a board of revision is entitled to consideration by the BTA, such determination is not presumptively valid.
As we have stated: “The Board of Tax Appeals is vested with wide discretion in determining the weight to be given to evidence and the credibility of witnesses * * *
“The fair market value of property for tax purposes is a question of fact, the determination of which is primarily within the province of the taxing authorities, and this court will not disturb a decision of the Board of Tax Appeals with respect to such valuation unless it affirmatively appears from the record that such decision is unreasonable or unlawfid.” Cardinal Fed. S. & L. Assn. v. Cuyahoga Cty. Bd. of Revision (1975), 44 Ohio St.2d 13, 73 O.O.2d 83, 336 N.E.2d 433, paragraphs three and four of the syllabus.
The BTA was correct in observing, as it did, that a taxpayer on appeal “may successfully challenge a determination of a Board of Revision only where the taxpayer produces competent and probative evidence to establish the correct value of the subject property.” Here, the taxpayer did that. Amsdell presented evidence of an arm’s-length transaction involving the purchase of the real property on which the facility was constructed, and evidence of the costs of renovation and construction of the improvements.
The BTA found that Amsdell did not sustain his burden of proving that the decision of the board of revision was invalid. The BTA also found no appropriate support for Amsdell’s evidence. Those findings are unreasonable and unlawful.
Our holding in Mentor Exempted Village Bd. of Edn. v. Lake Cty. Bd. of Revision (1988), 37 Ohio St.3d 318, 319, 526 N.E.2d 64, 65, is pertinent:
“ * * * [The taxpayers] did not present any evidence to the BTA. Once the school board had presented evidence that the property’s value was different from that determined by the board of revision, [the taxpayers] * * * should have rebutted the school board’s evidence.”
In addition, Amsdell, as a principal owner, was competent to present testimony, including his opinion of the value of the real property. Smith v. Padgett (1991), 32 Ohio St.3d 344, 347-348, 513 N.E.2d 737, 740-741. That testimony, of course, is subject to the BTA’s determination of the appropriate weight to be accorded it. Smith, supra, at 348, 513 N.E.2d at 741. The BTA, as the trier of fact, had the duty to evaluate and criticize an owner’s testimony; it should not have rejected it completely. See Tokles & Son, Inc. v. Midwestern Indemn. Co. (1992), 65 Ohio St.3d 621, 605 N.E.2d 936, paragraph two of the syllabus. Amsdell, in addition to his testimony about the purchase of the land and the renovation of the facility, *575expressed his opinion, using the income approach to value, that the subject property was worth between $1,000,000 and $1,250,000 on January 1, 1989.
The evidence before the BTA established that the true value of the subject property was no more than its acquisition and construction costs of $1,305,771. The BTA’s failure to consider Amsdell’s evidence, and its decision to affirm the board of revision, was unreasonable and unlawful. The decision of the BTA is reversed and the cause is remanded for further proceedings consistent with this opinion.
Decision reversed and cause remanded.
Moyer, C.J., A.W. Sweeney, Wright, Resnick, F.E. Sweeney and Pfeifer, JJ., concur. Douglas, J., dissents.