From Ciampino airport  "G.B. Pastine " or from Fiumicino airport  " Leonardo da Vinci ", take the shuttle-bus to Termini station.  (One way Ticket : from  4 to 8 euro per person). When you arrived to Termini Station, take the underground (A line) Anagnina direction and get off at "Re di Roma" Station. (One way Ticket: 2,00 euro).
Follow the signs to Cerveteri street, the apartment is located 20 meters from the exit of subway station. 
 

Leonardo Express connects you from Roma Termini to the train station in Rome Fiumicino Airport in just 32 minutes.
The price of the single ticket, valid for one trip is 14 euro.

Otherwise take FL1 to Roma Tuscolana Station. (Ticket 8 euro). 

Arrived to Termini Station or  Roma Tuscolana Station take the underground (A line) and get off at "Re di Roma" station. (one way Ticket: 2,00 euro). Follow the indications to Cerveteri street, the apartment is located 20 meters from the subway station. 
 

From Ciampino airport  the structure can be reached in taxi in about 35 minutes traffic permitting, for a fixed price of 35- 40 euro. From Leonardo Da Vinci airport  the structure can be reached in taxi in about 45 minutes traffic permitting, for a fixed price of  48- 60 euro.