The exterior set was practical, rather like Brookside Close and Ramsey Street.
Although no-one lived on the Elderado set at the time, the building weren't just a facade ( like the Eastenders backlot which has walls of fibreglass ), the interiors of the buildings were used for recording interior scenes, so that the production team didn't need to hire studios.
It is now either a holiday resort or residential area, I can't remember which, but I did see it featured on a TV programme some time ago.
I think there are tours of the set that you can go on.