Local Government Code §232.0021

(a) The commissioners court may impose an application fee to cover the cost of the county's review of a subdivision plat and inspection of street, road, and drainage improvements described by the plat. (b) The fee may vary based on the number of proposed lots in the subdivision, the acreage described by the plat, the type or extent of proposed street and drainage improvements, or any other reasonable criteria as determined by the commissioners court. (c) The owner of the tract to be subdivided must pay the fee at the time directed by the county before the county conducts a review of the plat. (d) The fee is subject to refund under Section 232.0025 (i).