We have studied the transport properties of thin LaTiO 3 films, grown on NdGaO 3 and SrTiO 3 substrates. In case of films grown on NdGaO 3 we see a sharp increase of film resistivity when the film thickness drops below 18 nm. This appears to correspond to a surface depletion layer in the films. We could avoid the detrimental effects of surface states by growing LaTiO 3 films on SrTiO 3 substrates and covering the LaTiO 3 layers with a SrTiO 3 cap layer. In this case we succeeded in fabricating isolated LaTiO 3 layers, sandwiched between SrTiO 3 , that remained metallic down to 4 K. This work shows that it is feasible to use the LaTiO 3 /SrTiO 3 system for growing metallic nanostructure arrays.