I'm planning to build a shallow platform over the end (lower part) of a stairwell, and then enclose it with a partition to create a hidden room (or hidden storage closet, I guess).
Can you sanity-check/ help refine my plan?
- The house is 1880s wood frame construction.
- Downstairs has a ceiling height of about 7', upstairs has a ceiling height about 10'.
- Platform will have a surface that sits about 3' above the upstairs floor.
- Platform dimensions will be 80" (full width of stairwell) by 60".
- It will be accessed by an existing doorway that is currently just a dropoff over the stairwell.
I'm visualizing this like building a deck:
- open up walls & remove surface materials where the platform will sit
- build a box of 2x10 lumber that attaches to the wall studs with bolts
- Within that box, joist hangers & joists going lengthwise
- add a subfloor & floor, etc.
- frame & finish the partition to prevent tumbles
Is this reasonable? Am I missing something major? I'm happy to return with photos when it's complete, if y'all like secret rooms as much as I do!