This is the 909th most frequent Finnish word.
rakennetaan
"Rakennetaan" means "is built" or "is being built" in English.
Here, 'rakennetaan' is used in the passive voice to indicate ongoing construction work without specifying who is building the school.
Kaupunkiin rakennetaan uusi koulu.
A new school is being built in the city.
In this example, 'rakennettiin' is the past tense form of 'rakennetaan,' showing an action of building that took place in the past.
Silloin kun taloa rakennettiin, maisema oli vielä koskematon.
When the house was being built, the view was still untouched.
This use of 'rakennetaan' is in a future context, conveying plans for constructing the cottage. Passive voice is used, which is common in Finnish to state facts or plans.