I would suggest you to avoid small localized builders and go for any project by pan India builders of good repute like Unitech and Avani Group or Forum projects. The price range is between Rs. 2000 to Rs. 3500 per square feet but can be negotiable considering your exact requirement, location and other choices.
Dobson Road has a large number of real estate majors planning out various townships and schemes. The potential of this area as rightly pointed out by the above member is still to get unlocked and thus Howrah offers a great investment opportunity in the medium to long term. The prices are just right for investing in any 4 BHK or stand alone villas.
Dobson Road also known as Howrah has been a hotbed of real estate activity in the recent past. The proposed East West Metro corridor connecting Salt Lake Sector V in the east to Howrah maidan in the west is going to unlock a lot of potential of the region. A large number of domestic and pan India developers are active in Dobson Road area. Good reputed developers including Unitech, Calcutta Metropolitan and Avani Group have all residential townships in the area including 4BHK apartments and dedicated villas.