A swing set lifespan can range from 3 years to a lifetime — how long yours lasts is 100% based on the quality of the set you buy.Click to see full answer. Also asked, how long do metal swing sets last? about 15 to 20 years Furthermore, how do you maintain a wooden swing set? How to Properly Maintain Your Wooden Swing Set Do a thorough inspection of the swing set. The entire set should be inspected thoroughly, paying special attention to the roofing, hinges, screws, bolts, ropes, cables, and chains. Clean any dirt or mildew form the playset. Apply fresh stain and sealant at the correct times. Inspect all accessories for any damage. Consequently, are backyard swing sets worth it? If you have little kids, under 3, then a swing set in the back yard would be worth it. They will get enough years of use out of it to justify the cost and work. For older kids the park works just fine. They also have a swing set but the kids do so much more on the dome.How long is a swing?For backyard, residential use, the standard for swing beams is 12′ long. A 12′ long swing beam can fit 3 swings comfortably (not including disc or tire swings). So where do I start? You can start by figuring out which swings are going where.