Nanoporous barium titanate and lead titanate thin films (similar to 100ă nm calculated from ellipsometric data) are prepared starting from solă gel solutions modified with a commercially available block-copolymer andă evaporation-induced self-assembly methodology. The tuning of the thermală treatment followed by in situ ellipsometry allows the decomposition ofă the organic components and of the structuring agent leading to theă formation of porous tetragonal crystalline perovskite structures asă observed by XRD, HRTEM, SEM, and ellipsoporosimetry. Both nanoporousă barium titanate and lead titanate thin films present local piezoelectrică and ferroelectric behavior measured by piezoresponse force microscopyă (PFM), being promising platforms for the preparation of the generationă of new multifunctional systems.