It is possible to restore a filled-in pool. If you want to dig up and repair a filled-in pool in your backyard, the process will cost about the same as the cost of installing a new in-ground pool. You might do this if the filled-in pool is causing sinking, swelling, or drainage issues in your yard. A new pool may resolve these problems and increase your property value.

The disadvantages of container pools come down to flexibility and customization. Shipping containers come in standard sizes, so the sizes and shapes are limited. They also have a very distinctive look, which may not suit the aesthetic of your backyard. 

Beyond that, while container pools are more affordable than in-ground pools, certain models can be more expensive. This includes the cost to heat your pool, since the metal walls have more heat transfer than other types of pools (which some brands circumvent with insulation).

Yes, adding a pool to your property will almost always increase your homeowners insurance premiums. This is because pools are considered hazardous, which increases your home's liability risk. The replacement cost of the pool itself is also factored into your home's rebuilding cost when determining coverage limits. The amount of the increase can vary from as little as $50 to several hundred dollars more per year, depending on your insurance company, location, current coverage, and installed safety features. It is best to contact your insurance agent before installing a pool to get an estimate, understand their specific guidelines, and factor the ongoing cost into your budget.

An above-ground pool with a deck can increase your home's value by as much as 4% to 7%, but it depends on your local climate, potential buyers, and the size and condition of your pool. Some buyers see a pool as a liability instead of a luxury, especially if it's at the end of its life span. In general, it's best to add a pool and deck to your property if it will bring you enjoyment—not because it raises the value of your home.