Plan the scope
A new deck needs a load path from the decking through the framing and posts into suitable footings. Discuss the ledger connection, drainage at the house and access for digging before choosing the finished surface.
- Approximate dimensions and door locations
- Attached or freestanding layout
- Dining, seating and access to the yard
Sources: Wisconsin Uniform Dwelling Code — SPS 325 Appendix B. Checked November 8, 2026. Confirm current requirements with your building inspector.
Permits and the property
For a project described as being in Oshkosh, confirm the parcel’s actual municipality before applying. Mailing addresses and zoning jurisdictions are not always interchangeable. Ask that authority about setbacks, easements, deck plans and inspection stages. The statewide deck appendix is a starting point, not parcel-specific approval.
Sources: Wisconsin Uniform Dwelling Code — SPS 325 Appendix B. Checked November 8, 2026. Confirm current requirements with your building inspector.
What to include for this property
For your Oshkosh inquiry, describe access to the backyard and the distance from the house door to the ground. Sketch the intended footprint, stair direction and any roof or heavy-load features.
Built around Wisconsin conditions
Under Wisconsin’s prescriptive deck appendix, footings must bear on solid ground below frost penetration or at least 48 inches below finished grade, whichever is deeper. This is not a claim that every site has exactly 48 inches of frost. Soil, the house foundation and the proposed loads can require additional design.
Snow drift and sliding snow are explicitly identified as potential concentrated loads. Ask your contractor or designer to check the actual layout rather than treating a basic deck table as approval for a roof, hot tub or heavy planter.
Sources: Wisconsin Uniform Dwelling Code — SPS 325 Appendix B. Checked November 8, 2026. Confirm current requirements with your building inspector.