The first question presented by this appeal is whether the Superior Court had authority to issue a writ of mandamus to compel the county commissioners to revalue all real property in Nash County.
[2-4] The nature of mandamus and the limitations upon its use have been stated often. Safrit v. Costlow, 270 N.C. 680, 155 S.E. 2d 252; Hospital v. Wilmington, 235 N.C. 597, 70 S.E. 2d 833; 3 Strong, N. C. Index Mandamus §§ 1, 2 (1960); 2 McIntosh, N. C. Practice and Procedure § 2445 (2d ed. 1956). It suffices here to say that mandamus issues only to enforce a clear legal right. The writ will not lie to control the discretion vested in a governmental agency or official. It cannot be employed if other adequate means are available to correct the wrong for which redress is sought. Thus, when the legislature has provided an effective administrative remedy, it is exclusive. Snow v. Board of Architecture, 273 N.C. 559, 160 S.E. 2d 719; Young v. Roberts, 252 N.C. 9, 112 S.E. 2d 758; St. George v. Hanson, 239 N.C. 259, 78 S.E. 2d 885; Harris v. Board of Education, 216 N.C. 147, 4 S.E. 2d 328; Moreland v. Wamboldt, 208 N.C. 35, 179 S.E. 9; Hickory v. Catawba Co., 206 N.C. 165, 173 S.E. 56; Bunn v. Maxwell, 199 N.C. 557, 155 S.E. 250.
At the hearing before Judge Hubbard, plaintiffs’ evidence tended to show that in the 1969 revaluation no land in Nash County had been appraised at its true value in money as required by G.S. 105-294, and that all rural property had been grossly undervalued. Defendants’ evidence tended to show that, in their opinion, they had appraised all land at its true value “as far as practicable,” and that the schedule adopted would result in reasonable equality.
 Plaintiffs are entitled to an adjudication of their charges that rural property has been undervalued and that a disproportionate *322share of the tax burden will fall upon urban property owners unless the assessment roll is corrected and inequalities eliminated. Defendants assert, however, that the Superior Court cannot determine this controversy in an action for mandamus; that the legislature has made an administrative agency, the State Board of Assessment (State Board), the arbiter of disputes pertaining to the valuation and assessment of property for ad valorem taxes. To determine which tribunal has jurisdiction of the matters alleged in the complaint, we must review those sections of the Machinery Act (G.S. 105-271 et seq.) which govern the assessment, listing, and collection of taxes. See In Re Appeal of Broadcasting Corp., 273 N.C. 571, 160 S.E. 2d 728.
Every eighth year G.S. 105-278 requires each county to revalue and reassess, as of January first, all real property for ad valorem tax purposes “at its true value in money.” True value is defined as the amount of cash or receivables which can be obtained for property when it is sold in the usual manner. G.S. 105-294. (In other than revaluation years, reassessment is governed by G.S. 105-279. See In Re Pine Raleigh Corp., 258 N.C. 398, 128 S.E. 2d 855.)
Prior to each octennial revaluation it is the duty of the tax supervisor, subject to the review and approval of the county commissioners, to compile “standard uniform schedules of values to be used in appraising real property in the county.” Thereafter “a competent appraiser” is required to visit every tract. In fixing its value assessors must consider “its advantages as to location, quality of soil, quantity and quality of timber, waterpower, water privileges, mineral or quarry or other valuable deposits, fertility, adaptability for agriculture, commercial or industrial uses, the past income therefrom, its probable future income, the present assessed valuation, and any other factors which may affect its value.” Similarly, appropriate criteria are specified for the appraisal of buildings on the land. G.S. 105-295.
' After property has been listed and valued, the county commissioners sit as a board of equalization and review. G.S. 105-327. (In at least five counties a special board of equalization and review has been created by local act.) The board of review is required to hear any taxpayer who considers himself aggrieved in respect to the valuation of his own property or that of others. In the performance of its duty to equalize valuations in the county “to the end that all property shall be listed on the tax records at the valuation required by law,” the Board is required to increase or decrease the assessed value of any taxable property which, in its opinion, has been returned *323below or above its true value. (As to reassessment in other than revaluation years see G.S. 105-279.)
By complying with the provisions of G.S. 105-329, “[a]ny property owner, taxpayer, or member of the board of county commissioners may except to the order of the board of equalization and review and appeal therefrom to the State Board of Assessment.” Prior to 14 February 1969 each taxpayer or ownership interest was required to appeal separately unless the State Board consented to joint appeals. Since the passage of Ch. 7 § 2, S. L. of 1969, however, “taxpayers and ownership interest may file separate and distinct appeals or joint appeals at the election of one or more of the taxpayers.”
The State Board is required by G.S. 105-275 to “exercise general and specific supervision over the valuation and taxation of property throughout the State,” and it is constituted “a State Board of Equalization and Review of valuation and taxation of property in this State.” It is authorized to employ valuation and appraisal specialists and such other assistants as may be needed for the performance of its duties. G.S. 105-273 (c). It has access to all municipal, county, and departmental records and may prescribe the forms and methods of record-keeping. G.S. 105-276. The Board’s administrative assistant, inter alia, is required to prepare and distribute instructions to the boards of county commissioners and all those engaged in the valuation and assessment of property; to advise them with reference to all their duties; and to make studies of the ratio of appraised value of real and personal property to market value in each county in the year of revaluation. G.S. 105-277.1.
In addition to the right of appeal conferred in G.S. 105-329, the State Board is empowered by G.S. 105-275(3) “[t]o hear and adjudicate appeals from the boards of county commissioners and county boards of equalization and review as to property liable for taxation that has not been assessed or of property that has been fraudulently or improperly assessed through error or otherwise, to investigate the same, and if error, inequality, or fraud is found to exist, to take such proceedings and to make such orders as to correct the same.” This same section provides that if the State Board finds the tax list or assessment roll of any county to be grossly irregular, or any property to be unlawfully or unequally assessed as between individuals, sections of the county, or counties, it shall correct such irregularities “and shall equalize and make uniform the valuation thereof upon complaint by the board of county commissioners under rules and regulations prescribed by it. . . . Provided, further, that taxpayers *324and ownership interests may file separate and distinct appeals or joint appeals at the election of one or more of the taxpayers. . .
Prior to the enactment of Ch. 7 § 1, S. L. of 1969, the last proviso of G.S. 105-275(3) (like a similar provision in G.S. 105-329) permitted joint appeals by taxpayers only with the consent of the State Board.
The preceding resumé discloses an integrated and adequate procedure for the assessment of taxable property and for administrative review of questioned evaluations. It likewise manifests the legislature’s intent that the agency designated to hear appeals in all matters pertaining to tax valuations should also be the one empowered to make the final valuation. The State Board — unlike the courts — has the staff, the specialized knowledge and expertise necessary to make informed decisions upon questions relating to the valuation and assessment of property. This case demonstrates the wisdom and practicality of the requirement that an aggrieved taxpayer or other party exhaust all available administrative remedies before resorting to the courts for relief.
In bringing this action plaintiffs relied upon Stocks v. Thompson, 1 N.C. App. 201, 161 S.E. 2d 149. The plaintiffs, in that case, sought a writ of mandamus to compel the county commissioners to include tobacco allotments as an element of value in the appraisal and assessment of Columbus County real estate for taxes. The judge overruled the defendants’ motion to dismiss the' action because of plaintiffs’ failure to exhaust the administrative remedies provided in G.S. 105-327, G.S. 105-329, and G.S. 105-275(3). The Court of Appeals granted defendants’ petition for certiorari to review the ruling. In that court the defendants demurred ore terns to the complaint on the ground that plaintiffs had stated no cause of action for mandamus.
The Court of Appeals overruled the demurrer, holding that mandamus would issue to compel defendants to consider the value of tobacco allotments in assessing property but not to direct the manner or amount of the valuation. It affirmed the Superior Court’s refusal to dismiss the action on the ground that the administrative remedies were so totally inadequate that individual citizens were not required to exhaust them before resorting to the courts. The rationale was: (1) In appeals from county boards of review to the State Board, G.S. 105-329 and G.S. 105-275(3) (as then written) required each taxpayer to file a separate appeal and prohibited joint appeals except with the consent of the State Board. (2) The statutes gave individual taxpayers seeking review of the valuation of a particular tract an adequate remedy but not citizens contesting the assessment *325roll for an entire county. The second sentence in G.S. 105-275(3) directs the State Board of Assessment, upon complaint by the board of county commissioners, to correct any grossly irregular tax list or assessment roll and the valuation of any property unequally assessed as between individuals, counties or sections of counties. The Court of Appeals construed this sentence as limiting the right of appeal in such instances to the Board of County Commissioners. We do not agree.
 It is presumed that the legislature acted in accordance with reason and common sense and that it did not intend an unjust or absurd result; and, in construing a statute, the court always looks tp its purpose. State v. Humphries, 210 N.C. 406, 186 S.E. 473; Ikerd v. R. R., 209 N.C. 270, 183 S.E. 402; 82 C. J. S., Statutes §§ 316, 323, 325, 344 (1953). After giving the State Board “general and specific supervision” over valuations and taxation through the State, the legislature would hardly prevent it from correcting a grossly irregular assessment roll or an unlawful or unequal assessment as between individuals or sections of a county until it received a complaint from the Board of County Commissioners — ordinarily the very agency responsible for the alleged irregularities! In the few counties in which the board of commissioners does not sit as the board of equalization and review, and in proceedings brought to equalize values as between counties, the board of county commissioners might be expected to appeal to the State Board. In any other situation, however, the possibility of such an appeal seems remote. The records of the State Board of Assessment, going back to 1950, disclose no appeal by a board of county commissioners.
The decision in Stocks v. Thompson would nullify G.S. 105-327,. which specifically allows any property owner dissatisfied with the valuation placed upon his property or the property of others to seek redress from the county board of equalization and review. The designation property of others is broad enough to include every piece of rural land or the county’s entire tax list if the commissioners have failed to value it as required by law. Furthermore, the final proviso of G.S. 105-275(3) specifically refers to appeals by individual taxpayers. This section is not a model of legislative draftsmanship, but its first sentence clearly imposes upon the State Board the duty to hear and adjudicate all appeals from the county boards as to property which has been “improperly assessed through error or otherwise.” This language encompasses appeals by individuals as well as boards. The second sentence, which authorizes appeals by boards of county commissioners, did not deprive the individual taxpayer of the right granted in the first.
*326The defendants in Stocks v. Thompson did not petition this Court for certiorari to review that decision. With all deference to the Court of Appeals and the learned author of the opinion, we think that case was wrongly decided.
 We hold that in G.S. 105-327, G.S. 105-329, and G.S. 105-275(3), the legislature has provided adequate means whereby the individual taxpayer may contest not only the valuation which the county commissioners have placed upon his own property but the entire tax list or assessment roll, and that he must exhaust this administrative remedy before he can resort to the courts.
 If defendant-commissioners have failed to value rural land in Nash County at its true value in money — be the failure deliberate, an error in judgment, or caused by a misconception of the law — , plaintiffs’ initial step is to complain to the county board of equalization and review and request a' hearing. If they are dissatisfied with the action taken by that board they may except to its order and appeal to the State Board. Power Co. v. Burke County, 201 N.C. 318, 160 S.E. 173. Thereafter plaintiffs may resort to the courts, but only to obtain judicial review for errors of law or abuse of discretion by the State Board.
The decision is that the Superior Court had no authority to issue the writ of mandamus. The judgment from which defendants appeal is
Mooee, J., did not participate in the consideration or decision of this case.