tional materials of the new generation [1-4] is an important task and priority in construction. Among these materials are the nanomodified cement mortars with the photocatalytic and hydrophobic properties. Multifunctional cement composites containing the nano-sized titanium dioxide ensure the self-purifying properties and the ability to clean air from organic pollutants. This makes it possible to build smart functional buildings that provide the effect of self-cleaning, as well as the antimicrobial properties, and help clean the air 1. Introduction The development of modern technologies in the construction industry gives rise to the new format of housingmulti-comfortable houses. The "Active House" concept of such buildings predetermines the need for a synergic combination of key factors such as energy efficiency, comfort, and healthy living conditions. At present, the development of nanotechnologies that can be used for designing multifunc