In Jainism, the idea of a fixed “monastery” (like in Buddhism or Christianity) generally does not exist.

• Jain sadhus and sadhvis (monks and nuns) are always travelling (vihār), except during Chaturmas, when they stay in one city for about four months.
• They usually stay in upāśray / sthank / Jain bhavan provided by the local Jain sangh, not in a permanent monastery owned by them.

About Kalyan, Maharashtra specifically:

• There are Jain temples and sanghs in and around Kalyan (both Śvetāmbara and Digambar), and often they have dharamshala / upāśray-type facilities attached.
• Whether a sadhu–sadhvi is currently staying there changes frequently, depending on their vihār and Chaturmas plans.

So:

1. Yes, there is Jain sangh presence in Kalyan.
2. But a permanent “monastery” with resident monks all year round is generally not a Jain system.
3. For exact current details (which group, which upāśray, who is staying there), the best way is:

- Visit any nearby Jain temple (derasar / mandir) in Kalyan. - Ask the temple pujari or sangh office; they will tell you which upāśray or bhavan is active and if any sadhus/sadhvis are present.