Tex. Natural Resources Code § 23.016: OFFICE LOCATION.

(a) The county surveyor's office shall be located in the courthouse or in a suitable building at the county seat.

(b) Rent for an office outside the courthouse shall be paid by the commissioners court on showing that:

(1) the rent is reasonable;

(2) the office is necessary; and

(3) an office is not available at the courthouse.

Acts 1977, 65th Leg., p. 2368, ch. 871, art. I, Sec. 1, eff. Sept. 1, 1977.