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Top-Rated Dock building and repair pros in Sumner - Updated Nov 2026

Dock Building and Repair FAQs, answered by experts

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.

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.

If you don’t want to rely on an anchor on land, you can also build dock posts. You’ll need to rent a water jet to blow out sand and silt from the lake floor in order to place the posts; it’s a complicated task that is best left to a professional.

In most areas, dock builders need some type of license. In some states, only a general construction license might be necessary, while a marine construction license is required in others. You can check online to see which is mandatory in your area, and then you can use Angi’s contractor licensing tool to make sure the company holds the proper license. Since dock construction is inherently dangerous, confirm with your builder that they are fully insured for everyone’s protection.

When deciding how big of a dock you can build, you should check with your city and state for any restrictions. Some cities won’t allow docks larger than one-fourth of the width of a body of water, while others have no restrictions at all. Gather this information when you apply for your permits so you can plan the build accordingly.

The Sumner, MI homeowners’ guide to dock building and repairs

From average costs to expert advice, get all the answers you need to get your job done.