Spanish to English Tech/Engineering Metrology

Hello everyone.

Even though I am not translating a technical document, the term is indeed very specific.
The original sentence in Spanish is:
"...hizo realidad la construcción de XXX en dos plazas de terreno - hoy parte de otro edificio."

My try:
"...made the construction of XXX a reality in two ___ land lots - now part of another bulding."

I can´t find an exact translation for this metric unit, which is very old, by the way.

Urgent help and input is much appreciated.

Thanks everyone!