Hi XXXXXX;
Where I live no. Where you live I dont know. But if you tell me where that is I'll find out (if I dont already know that is).
Hmmm.
A bit out of my neighborhood (southern California) but the ICC codes, and its Canadian counterpart both state that if the deck is not attached to another structure, is 100% self supporting, is for private use, does not have electrical wiring or fixtures mounted to it, does not support a hot tub or sauna, has no plumbing attached to it (this includes gas pipes for a BBQ), is properly railed if over two steps high to the top of the decking material (that is two risers plus the thicknes of the tread. maximum of 16"), Has balusters placed so that a 4" sphear will not pass between them, and is built to industry standards, then a permit is not required.
All the above is subject to change, or modification by any government entity, or private association having authority over a community, or development by resolution or any form of regulation as they deem fit for their area of governance.
Basicly what the above means is that you need to check with your local building department and ask if they are ok with your deck like it is without a permit. They are the ones that have the last say. A simple phone call to your local building departmrent will get you the information.
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Best regards; The Home Smithy
Jack of all trades Master of a few.
#1 Home Improvement Expert. Over 30 years experience in construction, and home repairs
A 25" deck will need a railing but not a permit.
Please be sure to call your local building departmant and confirm the need for a permit. You would be suprised at some of the strange and crazy local codes I have run up against in my days as a carpenter.