The simple answer to this question is that it depends on the type of heavy-duty recliner you choose to buy. Every recliner is different in its construction, size, dimensions, weight capacity, and, of course, its reclining angle. All of these factors go into how much space you need to recline it fully. If we are talking about regular or lift recliners, you might need up to 3 feet of clearance distance with some models. On the other hand, wall-huggers won’t require more than five inches to stretch out fully. It’s recommended to check the product description or customer reviews to find out how much space you must save for your recliner.