How to Build a Deck on a Storm Easement

Locate the storm easement and measure the width. Calculate how much of the deck has to be constructed over the easement. Reconfigure the layout of the deck to avoid it, if possible.

Check with local building officials about regulations for structures over your storm easement as well as construction guidelines about structural design to maintain drainage in the easement. Consult with design professionals if required to review your deck plan for compliance with building regulations.

Determine if the easement is for surface or subsurface drainage. Check for depth of pipes for subsurface drainage. Locate excavation points, or post and pier support, where the pipes won't be disturbed.

Build the deck high enough to permit access beneath it with 2 feet minimum, or as required by building regulations. Space posts to avoid the storm easement, while maintaining structural support appropriate for the live load.

Excavate for the piers with the smallest equipment possible, such as a rubber-tired mini-excavator. Slope the ground away from the piers when they're in place. Ensure the slope of the ground under the deck is maintained or restored in the best way possible for the site.

Assemble the structural members using hardware that can be removed without damaging the components, and that allow for fastening with bolts and lag screws instead of nails. Use beam hangars, post straps and ties, or post beam caps for beam connections. Install joist hangars or rafter ties for connecting joists to beams, and mending plates for joining a pair of joists that meet over a beam.

Fasten the decking with screws or bolts. Countersink the fasteners into the material using a countersink bit on the drill. Anchor posts to the deck surface with deck brackets. Use joist angles for fastening rails to posts for the handrail assembly.