Continuing with information to overcome the pitfalls of applying the certificado de domicilio. At their Tramite website where you make your request for an appointment, the only stated requirements are 2 resident witnesses with DNI and your passport, and your personal claim of an address. Not stated is the requirement (at the Recoleta Mall appointment location) of a translation and legalization of your passport's main page. If you were informed in advance, while you were waiting for the appointment date you could of gotten this, but no, you'll have to go get it done and bring it back to be added to your application.
Reading on this thread you might get the impression that the large government office at Lavalle 1220 address is the place to go for this, it is not. Nor is the address they'll redirect you to from Lavalle, Uruguay 753. Although if you're really insistent at the Informes counter at Uruguay 753 you may get the address of the Colegio de Traductores Publicos de la Ciudad de Buenos Aires at Avenida Corrientes 1834. And off you go trekking up Corrientes on foot the many blocks. Arriving at Correientes 1834 you're getting very close. The woman at the desk once she grasps your need, will pull out a folder with the names and addresses of possibly every translator in Buenos Aires, in tiny type, for you to choose one. Apparently she's forbidden from just directing you to a convenient one, you have to find an address from the listings. And as it happens there's one right next door by 1/2 a meter at Corrientes 1832:
Circulo de Traductores Asociados, Avenida Corrientes 1832 9th floor "D" where, once you get past the intercom entrance at ground level and up the elevator and through the intercom doors you'll find, if you're lucky, the winsome Letizia who will take your request and ask you if you'd also like it legalized for an extra fee, accept your passport, and ask you to return at 2 pm the next day to pick it up. Total cost: 1,390 pesos
Elapsed time if you knew where to go in the first place maybe 15 minutes. If you need to discover the information and location from probably the heaviest concentration of government and kiosko type shops that line those streets and don't know jack, about 2 hours.