Awesome question Jalana. This is how I do it.
1a) Have all the specifics of the commercial property recorded. Know everything you could know about the use, restriction and anything else you could think of about the Warehouse. You have to begin to ask yourself questions like * who would want to use this space? * what sort of businesses are in the area? * are there advantages with this warehouse? ** You've got to think like your potential buyer.
1b) Put a sign on the property.
2) Take photos of the warehouse and I also put together a short video walk through, heck you can use your phone. Be sure to get an aerial view of the property (Google Maps)
3) Once the photos, video and info are ready I'd through it up on all the social networking sites, including Linked In. Be sure to use the exact address the same each time and make sure your contact info is also always the same. Google looks for consistently in the information you gather and this well help. Use the video you took for YouTube.
4) Throw the property up on LoopNet (site designed for Commercial properties) I'd also throw it up on Craigslist and other classified sites. Also send a marketing piece to local business as well so they are aware of the property.
5) If you are willing to pay a co-broke on the warehouse get this information in front of every broker who has done commercial business of this sort before. You can do this a million ways. Mail Chimp may be a good option.
6) create a kick ass direct mail marketing piece and buy a data list of potential customers who could use this space. You can look for a ton of list brokers and you definitely want to look into EDDM as well.
I'm sure you already know all this stuff but heck I wanted to throw it out there for you. Remember with marketing consistence and clarity is the name of the game. You need to have an awesome USP and CTA.
Well if you'd like any more ideas or help, always happy to. Give me a call/text or email. 954-610-9112