The most significant factor in knowing whether to repair or replace your dock is the extent of the damage and its age. If you have minor cracks on a few boards and the dock is less than 15 years old, it'll likely be worth repairing the damaged part. However, it's time to replace this essential water feature if you have significant damage, such as rotting wood in multiple areas, warps or cracks in the dock supports, or a damaged foundation.

Docks can last between 20 and 30 years, provided regular maintenance has been performed. Upkeep tasks like staining your dock annually to prevent water damage, repairing broken elements quickly, and using dock covers regularly will help extend your dock’s life. Your dock is likely nearing the end of its lifespan when it shows signs of rot, rust, and foundation damage.

The cost of repairs to your dock depends significantly on the severity and location of the damage. For minor repairs, such as replacing bumpers or patching a few cracks, you can expect to spend $100 to $800. For more extensive repairs, such as replacing decking or dock reinforcement, the cost increases to $800 to $2,000. Consult a local dock repair service to determine the estimated cost of your dock repairs.

Ideally, it's best to stain your dock once per year. Applying stain doesn't just keep it looking nice and new; it also helps extend the dock’s lifespan. Since you want to ensure water levels are at their lowest, it's best to have this project done by a professional dock repair service in the cooler autumn or early winter months. 

The cost of a new dock can range from $3,000 to $30,000, depending on the extent of the project size, location, and additional features.

For example, a boat lift can range from $1,000 to $8,000. The ladder you'll need for your dock can be anywhere from $100 to $800, not including installation. In addition, the decking you'll need for your dock can cost between $15 and $30 per square foot.