One of my most recently completed projects (though several more are still in the works) involved demolishing, extending, and rebuilding a very LARGE deck--2 levels with both indoor and outdoor sections.
Prior to rebuilding, the deck extended roughly 50 feet in length, but was too narrow to function properly. Old pressure treated wood was worn beyond use (nails sticking up, railing falling down.)
All decking was cleared to leave a bare foundation. After securing all existing joists with proper joist hangers and needed spacers, it was time for the improving work to begin.
To solve the issue of the narrow deck, a 4 foot extension was mounted to the existing foundation. 4x4 footers were cemented into the ground to assure proper support.
Upon completion of the extension, composite deck flooring was installed using a clip method (meaning no visible screws--only nice clean boards).
Custom railing and support rails were cut and stained to fit each section of railing (no kits here). Aluminum Contoured balusters and bronze solar caps added a unique touch.
Two grand entrance platform stairs (without railing) created a superior entrance.
For more pictures or information regarding a deck remodel, see my profile for contact information.