From Chistye Prudy metro station head south towards green Chistoprudnyy Bul'var about 250 m, turn left at Bol. Khariton'evskiy pereulok and after 230 m turn right at Chaplygina street. Galina's Flat will be on the right side of the street opposite to Latvian embassy.
Go through the arch to the yard and turn right. The entrance is # 3, press the buttom 'Galina's Flat'. The walk takes about 7-8 minutes.