Abstract. The article deals with the recent problems of implementation of construction projects for social infrastructure development. Being as basis of comfort life zone formation and important element of Smart Cities, social infrastructure facilities are practically considered by the developers often as project elements impairing effectiveness indicators of their activities. The purpose of the article is the justification of methodological approach to effective implementation of construction projects for social infrastructure development respecting the interests of main participants of investment and construction project: city, citizen, developers. Methodological approach deals with infrastructure facilities within the framework of urban blocks on the base of Smart Cities concept. The article articulates the concept of social infrastructure of urban blocks including condominiums with everyday serviced facilities on the ground floors and yard representing a private territory with landscaping, leisure and recreation grounds and fire lanes and which is accessible predominantly to inhabitants of particular block and which is closed to the public visit. Effective implementation of construction projects for social infrastructure development suggests creation of value innovation (basic element of blue ocean strategy) by means of transformation of so-called strategic canvas for social infrastructure facilities. Multifactor model for projects for social infrastructure development including each element's contribution to creation of additional value to customer was formed on the base of the method of expert assessments. It is presented mechanism of complex effectiveness assessment of decisions on value innovation for social infrastructure facilities respecting the interests of participants of investment and construction process. This mechanism can be used both for projects suggesting exclusively budgetary financing and for commercial projects. It was created an algorithm of practical implementation of stated methodological approach within the frames of Smart City concept. Risks to implementation of methodological way of their reduction were analyzed. Offers stated in the article are aimed to increase the effectiveness of implementation of construction projects within the frames of urban blocks when simultaneous quality improvement of life sphere takes place.