Conn. Gen. Stat. § 12-111

(2) The board shall, not later than March first, notify the appellant that the board has elected not to conduct an appeal hearing. An appellant whose appeal will not be heard by the board may appeal directly to the Superior Court pursuant to section 12-117a .

(3) The board shall determine all appeals for which the board conducts an appeal hearing and send written notification of the final determination of such appeals to each such person within one week after such determination has been made. Such written notification shall include information describing the property owner's right to appeal the determination of such board. Such board may equalize and adjust the grand list of such town and may increase or decrease the assessment of any taxable property or interest therein and may add an assessment for property omitted by the assessors which should be added thereto; and may add to the grand list the name of any person omitted by the assessors and owning taxable property in such town, placing therein all property liable to taxation which it has reason to believe is owned by such person, at the percentage of its actual valuation, as determined by the assessors in accordance with the provisions of sections 12-64 and 12-71 , from the best information that it can obtain. If such property should have been included in the declaration, as required by section 12-41 or 12-43 , the board shall add thereto twenty-five per cent of such assessment; but, before proceeding to increase the assessment of any person or to add to the grand list the name of any person so omitted, the board shall mail to such person, postage paid, at least one week before making such increase or addition, a written or printed notice addressed to such person at the town in which such person resides, to appear before such board and show cause why such increase or addition should not be made.

(4) When the board increases or decreases the gross assessment of any taxable real property or interest therein, the amount of such gross assessment shall be fixed until the assessment year in which the municipality next implements a revaluation of all real property pursuant to section 12-62 , unless the assessor increases or decreases the gross assessment of the property to (A) comply with an order of a court of jurisdiction, (B) reflect an addition for new construction, (C) reflect a reduction for damage or demolition, or (D) correct a factual error by issuance of a certificate of correction. Notwithstanding the provisions of this subsection, if, prior to the next revaluation, the assessor increases or decreases a gross assessment established by the board for any other reason, the assessor shall submit a written explanation to the board setting forth the reason for such increase or decrease. The assessor shall also append the written explanation to the property card for the real estate parcel whose gross assessment was increased or decreased.
or to the next revaluation, the assessor increases or decreases a gross assessment established by the board for any other reason, the assessor shall submit a written explanation to the board setting forth the reason for such increase or decrease. The assessor shall also append the written explanation to the property card for the real estate parcel whose gross assessment was increased or decreased.

(b) If an extension is granted to any assessor or board of assessors pursuant to section 12-117 , the date by which a taxpayer shall be required to submit a request for appeal to the board of assessment appeals shall be extended to March twentieth and said board shall conduct hearings regarding such requests during the month of April. The board shall send notification to the taxpayer of the time and date of an appeal hearing at least seven calendar days preceding the hearing date, but no later than the first day of April. If the board elects not to hear an appeal for commercial, industrial, utility or apartment property described in subsection (a) of this section, the board shall notify the taxpayer of such decision no later than the first day of April.

Requisites of valid notice of intended additions. 14 C. 72; 15 C. 447. Omissions and mistakes in assessments can only be taken advantage of by those in whose lists they occur. 15 C. 447, see also 65 C. 456. May add note, without interest, secured by mortgage. 39 C. 176. Addition without indicating property held legal. 44 C. 477. Nonresident whose personal property is wrongly assessed waives no rights by neglect to apply to board. 47 C. 477, see also 87 C. 234. Board only and not inhabitants in town meeting can review work of assessors. 48 C. 145. Appearance before board waives defect of notice. 75 C. 597; 85 C. 6. Does not supplant remedy of mandamus to compel assessors to properly list property not listed by taxpayer. 104 C. 549. Acquiescence of board in erroneous action of assessors as to listing of property is not a good defense to an action of mandamus to compel assessors to make proper list. 108 C. 258. Cited. 117 C. 393; 123 C. 547; 130 C. 702; 131 C. 275. Remedy for overvaluation of property is appeal to board of tax review. 146 C. 165. Persons aggrieved by denial of application for classification of land as farm land may appeal to board of tax review for reclassification. 156 C. 107. Cited. 158 C. 148; 165 C. 546; 169 C. 454; 179 C. 712; 184 C. 326; 193 C. 342; 196 C. 487; 200 C. 697; 224 C. 110; 226 C. 407; 227 C. 826; 228 C. 23; 240 C. 192; Id., 469; 241 C. 749. Bar to action must at any time use as its initial reference point the assessment date and not the date of decennial reevaluation. 242 C. 363. Cited. Id., 727. Subsequent title holder has no greater rights to challenge prior assessment than were possessed by its immediate assignor or by any prior assignee from the owner of a property at the time of assessment. 249 C. 1.

Cited. 8 CA 209; 21 CA 275; 26 CA 545; 29 CA 97; 42 CA 318; 44 CA 517. Defendant's counterclaim re stipulated agreement with city was improper as defendant should have raised its issues in a statutory action under section. 140 CA 663. Filing of an appeal of the valuation of real property that is received after the February twentieth statutory deadline is timely when such deadline falls on a day when the municipal office is closed. 223 CA 333.

Improper to test amount of assessment in an action to collect unpaid taxes. 4 CS 391. Grounds of appeal from board of relief reviewed. 6 CS 505. Discussed. 32 CS 139. Cited. 39 CS 142; 43 CS 297.

Subsec. (a):

Prior notice required is a mandatory condition precedent to board's decision to increase property tax assessment; if legal notice is not provided, board's decision is illegal within meaning of Sec. 12-119. 109 CA 287. Amendment to Subsec. in P.A. 09-196 re fixed gross assessment amount within revaluation period was clarification of original statutory intent and has retroactive effect. 140 CA 290.