If you believe you could make tagging better then please do. For users it may be important to be able to find their apartments (it would have helped me, and those people I helped there), but I trust that its your country and you know it better than I. :-) 
Tagging individual apartments (and I guess there are a lot of those) may be messy but more precise. Do as you think it's best (or even better: consult local community). Thanks!