Newsflash: Additional SQFT question

Our home is a track home in a community with several others exactly like it. They are all 1960 sqft. A few years back I had the area under the stairs opened up for a walk-in storage that is 40 sqft. Now that we’re considering listing our home, my intention is to list it at 2000 sqft with the following disclaimer:”Living square footage includes added under-stair storage as reported by seller. Buyer to verify all square-footage claims.”On record we’re still 1960 but I always see claims that say the “source” of the information is the “seller” and I am hoping in this case I can legitimately say this without any repercussions.My question is, as long as I very obviously state on the listing and on my disclosures that I’m claiming the storage as part of my sqft claims, is there any other measure I should take to ensure this doesn’t blow up in my face?In case you’re wondering why I’m going to all this length for 40 more sqft, most buyers in my price range limit their search to 2000+ sqft in the mls.Thanks