Apartments For Rent In Cromwell Ct . Apartment rent in cromwell/middletown has increased by 7.8% in the past year. 2 beds • 2 baths. 4 Bellaire Mnr, Cromwell, CT 06416 3 Bed, 2 Bath SingleFamily Home from www.trulia.com Cromwell ct apartments for rent. The pricing for 7 studio apartments in cromwell currently ranges from $850 to $1,700 with an average price of $1,220. Use our detailed filters to find the perfect place, then get in touch with the property manager.