It appears that the learned trial court quashed the writ of certiorari as to appellant’s property wholly upon the ground that the petition therefor and the return did not disclose any injustice to the relator. There was no question but that the writ was seasonably applied for, so there was no reason for quashing it upon principles of estop-*584pel in pais, as in State ex rel. Schintgen v. La Crosse, 101 Wis. 208, 77 N. W. 167. There was no affirmative showing in the record of the proceedings of the board that appellant had property subject to taxation warranting an increase of the value assessed to it, as in Knapp v. Heller, 32 Wis. 467, and similar cases. How the learned circuit judge came to the conclusion that upon principles of equity it was proper to quash the writ we are unable to understand, except it be for the reason suggested on the oral argument, that there was no affirmative showing by the relator that the value of the property assessed to it was more than the value of its property subject to taxation, and that it was permissible for the court to deny the use of the remedy by writ of certiorari in the absence of such showing. We know of no such rule. When a board of review commits jurisdictional error in increasing the valuation of the property of any person, injustice is presumed in the absence of any showing in the record of its. proceedings to the contrary, or any such showing made affirmatively in proceedings by suit in equity or common-law writ of certiorari to challenge the assessment. Such affirmative showing was made by affidavit in support of a motion to quash the writ in Knapp v. Heller, supra. A denial of the remedy by writ of certiorari in the face of an unexplained record showing plainly jurisdictional error in increasing the assessment of property of the complainant, and in the absence of proof aliunde that after all no real injustice was done, as in this case, is going altogether too far. It withholds a remedy accorded to persons circumstanced as appellant was, as a matter of course and as a matter of right, as shown by repeated adjudications of this court. Wilson v. Heller, 32 Wis. 457; State ex rel. Heller v. Lawler, 103 Wis. 460, 79 N. W. 777. The board of review had no jurisdiction to change the assessor’s valuation except upon evidence warranting it, in some reasonable view thereof. Shove v. Manitowoc, 57 Wis. 5, 14 N. W. 829; State ex rel. Smith v. Gay*585lord, 73 Wis. 306, 41 N. W. 518; Fond du Lac W. Co. v. Fond du Lac, 82 Wis. 322, 52 N. W. 439; State ex rel. Giroux v. Lien, 112 Wis. 282, 87 N. W. 1113; State ex rel. Heller v. Lawler, supra. As indicated in tbe statement of facts, tbe only evidence produced before tbe board as to the saw logs was to tbe effect that tbe amount thereof placed upon tbe assessment roll by tbe assessor was substantially correct. Tbe evidence tending to show that tbe logs on band May 1, 1902, would make 13,000,000 feet of manufactured products, mill run, neither proved nor tended to prove that tbe log scale, made with tbe Scribner rule, exceeded about 10,000,000 feet. It is a matter of common knowledge and a matter of law that tbe value of logs, as regards measurement thereof, is determined according to an estimate, using what is known as Scribner’s rule, which does not give a very close proximation to tbe amount of products that can be manufactured from tbe logs by modern methods. True, the amount of such products produced from a quantity of saw logs may be so large as compared with tbe log scale as to impeach it; but no case of that kind is disclosed in tbe record before us. Assume that there was competent evidence tending to show that tbe logs on band May 1, 1902, would make 13,000,000 feet, board measure, of manufactured products, there was no evidence before tbe board that tbe excess over tbe amount of logs entered upon tbe assessment roll by tbe assessor was unusual. So tbe result is that tbe work of tbe assessor was corroborated rather than impeached by tbe evidence produced before the board. There was no other decision that could reasonably have been made. Therefore tbe board, in increasing tbe assessment of appellant’s logs, did not act reasonably on evidence, but acted in defiance of evidence; in other words, outside of its jurisdiction.
In respect to tbe act of increasing tbe assessment upon personal property from $3,000 to $8,000, upon tbe word of the assessor that such increase represented property inadvert*586ently omitted by bim from Ms assessment roll, in tbe absence of appellant and without any notice to him of the intention of the board so to do, we hold that it was clearly jurisdictional error. The statute, sec. 1061, Stats. 1898, expressly provides that a board of review “shall not raise any assess- jj ment nor assess any property not already on the roll unless i the person assessed, if a resident, . . . shall have been!' duly notified of such intention in time to appear and be[ heard before the board in relation thereto.” True, the error, • though jurisdictional, was not such as to void the tax in equity in face of a showing that no injustice was in fact done to the person assessed, nor such as to preclude'the court, in the exercise of its discretionary authority, upon such showing being made, from refusing the use of the remedy by writ of certiorari to avoid the assessment. But the trial court had no such situation to deal with. The attorney for respondent in such court stood upon the record returned in response to the writ, in presenting the motion to quash, instead of making proof in support of the motion, as he might have done, that appellant in fact had the property subject to taxation which the board had in mind when the addition to the assessment was made, or had property subject to taxation, not upon the roll, of equivalent value. Wilson v. Heller, 32 Wis. 457.
We assume that the trial court relied on McIntyre v. White Creek, 43 Wis. 622, a case arising under the law as it stood in 1875, where this court held that an error in some respects like the one here complained of, was a mere irregularity not going to the groundwork of the tax, nor remediable in the absence of proof showing that injustice was done. The decision was based on ch. 166, Laws of 1871, which did not j require notice to the property owner as a condition precedent to the power of the board to raise the value of his property | or to place property upon the assessment roll omitted by the | assessor. A notice was required by the statute, but the con-1 dition in that regard, as the law read, was a condition subse-1 *587quent. Tbe board was permitted, without notice to a prop-* erty owner, to increase his assessment, but it was provided I that after having done so notice should be given to the tax-1 payer in time to enable him to appear and be heard in regard to such action. The law was re-enacted in ch. 246, Laws ofl 1877, with some changes, but the requirement as to notice was not changed. It was still left as a mere condition subse- f quent. In the revision of 1878, however, the law was changed» to the form above quoted, notice to the property owner of an intention to change his assessment by increasing the valuation of his property already on the roll, or by adding thereto and valuing property omitted by the assessor, being made a condition precedent to the power of the board to do so. Since such change Fond du Lac W. Co. v. Fond du Lac, 82 Wis. 322, 52 N. W. 439, and other cases have been decided, wherein it was held that failure to comply with the statute in respect to the condition precedent is jurisdictional error. Of course, in equity, such an error can yet be disregarded upon proof that the substantial rights of the property owner j| will not thereby be prejudiced. Nevertheless, a disregard ¡Í of the statute standing alone raises a presumption of injustice which must be overcome in some proper manner, else the proceedings must be treated not only as void for want of jurisdiction, but inequitable, and the remedy by writ of cer-tiorari be afforded to the injured person unless he forfeits the right thereto by such conduct as to bring into play the principles of estoppel in pais.
What has been said as to increasing the assessment on personal property from $3,000 to $8,000 applies to the increase in the assessed valuation of appellant’s real estate. No notice was given by the board of its intention to make such increase. So far as indicated by its record, appellant appeared before the board and gave evidence tending to show that the assessed valuation of its real estate was too high. Some affidavits were filed to that effect, which were not entitled to be *588considered, at least except as admissions (State ex rel. Giroux v. Lien, 112 Wis. 282, 87 N. W. 1113), and probably not considered, as the decision of tbe board was contrary to the showing made thereby. The only competent evidence was that tending to show that the buildings and machinery forming a part of the real estate were insured for $35,000 under a system in vogue among insurance companies, requiring the owners of such property to insure up to the full value thereof, as a condition of such companies talcing the risk at all. That was particularly weak evidence as to the actual value of the property insured, and not evidence at all, it would seem, as to the value of the realty as a whole. So it is clear that the board not only raised the assessment of appellant’s realty without notice of its intention so to do> but acted without any evidence whatever showing that the assessor’s valuation was too low.
We apprehend that the inclusion by appellant, in the proceedings for the writ of certiorari, of a complaint because the board reduced the assessed valuation of property of third persons without evidence justifying the same, was not with any expectation of disturbing such assessments, but for the purpose of making an affirmative showing that the board, as regards appellant, not only acted illegally, but acted inequitably. While it raised the valuation of its property in some cases contrary to evidence, it reduced the valuation of the property of third ’persons without evidence. To show such inequitable conduct it was proper to bring the action of the board as to the property of third persons to the attention of the court.
By the Court. — The judgment appealed from is reversed, and the cause remanded for further proceedings in accordance with this opinion.