In this study, Cu2ZnSnS4 (CZTS) thin films were synthesized on glass substrates by using homemade successive ionic layer adsorption and reaction (SILAR) method. Copper (II) Chloride (CuCl2), Zinc (II) Chloride (ZnCl2), Tin (II) Chloride (SnCl2) were used as a cationic precursors and Thiourea (CS(NH2)2) was used as precursor for anions. De-ionized (DI) water was taken as the solvent for both precursors. Few drops of ammonia were added to both solutions in order to ensure the adsorption on the glass substrate. The deposited films were annealed at 200 °C for 1 h in air atmosphere and characterized by X-rays diffraction (XRD), field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), ultraviolet-visible (UV-Vis) spectrophotometry and dielectric spectroscopy. The structural characterization using XRD revealed the formation of the kesterite phase with preferential orientation along (112) plane. Morphological observations from SEM and AFM exhibited uniform and homogenous CZTS thin layer. Optical properties derived from UV-Vis analysis showed that CZTS has a direct band gap of 1.5 eV in the visible range which is close to typical values of an ideal absorber layer. Dielectric impedance measurements showed that CZTS thin film presents an adsorption in the lower frequencies of RF domain which is due to the atomic vibrations in the crystal lattice. The obtained CZTS has the potential to serve as a reliable, economical, and environment-friendly alternative to unstable, expensive and toxic absorber layers for photovoltaic applications.