The presented article deals with concrete measures for environment protection during reconstruction work on historical build and building of new underground and overground builds. These measures concern to the protection of flora, noise, water and solution of primary and secondary effects on environment protection as during as after building. There were claimed the most strick measures because of their situation in the most frequented place on historical centre of Košice. The next interest fact is walk zone on this part of Košice, which required the minimalization of negative interferences to the surroundings. There was made the project of environment protection, which can be an example of systematic accession to the solution of environment protection during building.