This is the 12713th most frequent Turkish word.
inşaatlarına
"To their constructions/buildings."
The word 'inşaatlarına' here means 'to the constructions of', implying the indirect object where the action of 'starting' is directed.
Belediye, yeni konutların inşaatlarına başlamak için izin verdi.
The municipality gave permission to start the constructions of new residences.
'inşaatlarına' refers to 'to the constructions of', showing the target of 'investments' by the company.
Şirket, altyapı inşaatlarına büyük yatırımlar yapıyor.
The company is making significant investments in infrastructure constructions.
In this sentence, 'inşaatlarına' means 'to the constructions of', emphasizing the surrounding constructions to which schools should give attention.