The β-alanine doped glycine phosphite (β-alanine-GPI) single crystals were grown from Sankaranarayanan and Ramasamy (SR) method. The colourless β-alanine-GPI crystal with cylindrical shape about 15 mm diameter and 49 mm length was obtained by this method. The single crystal, powder X-ray diffraction and optical studies were carried out for β-alanine doped GPI and these results were discussed in detail. Comparing with pure GPI the single crystal Xray diffraction shows changes in unit cell parameter values due to incorporation of β-alanine in glycine phosphite. The surface analysis of the crystals was analyzed by using optical microscope, Scanning Electron Micrograph (SEM) and Atomic Force Microscope (AFM). The laser damage threshold value of β-alanine-GPI was compared with pure GPI.