Can I add additional frame sections to my existing dock at some point in the future?

Yes!  “Extension” sections can be added at any time to lengthen a dock.

Also, some will add an “L” section at dock’s end to provide a mooring section parallel to shore.

“Patio” sections which have become very popular, and can also be joined at any time to give added area at dock’s end for lounging, or for use as a water sport platform.