Deductions & credits

It's only 6% of entire house area I using as my home office,and take only 18 weeks for this business .The depreciation may only very few amount.
Consider when the house sold in may years later (the house is my primary house) I may not remember how much depreciation I claim ever.Could I not claim the pepreciation now?I just would make the house sold simplified in the future.
Is it eligible if I claim all the other home office expenses but not including the house depreciation?