Can you have more then one listing?
- You can't have a hidden address if you want to play in Google Places (now Google+ Local). Don't get a PO Box either, it's got to be a physical address if you want to be able to rank locally.
Can you use a free Google Voice number?
- You can - but we always suggest that our clients use a real phone number. Having a "real" local phone number in your listing is a huge relevancy signal - remember, Google knows that your GVoice number is really just forwarding to another number. Better to play it as safe as possible. It's also important that you have the same local phone number in all of your local citations AND that the same local phone number is on your website.
Can you forward the number to a main number?
- Again, you can - but that doesn't mean you should. Why would you not just use the actual business number? NAP consistency in your citations is a huge factor in ranking locally. If you have a main number, use the main number.
Can the listing be in an office building? Such as a rented space...
- as long as you have a unique address (with a suite number or some identifier to set your biz apart from others in the same main building), you're fine
For a non SAB listing with the address visible -
Can you use free Google voice numbers for each listing and forward them to one main number?
- definitely not - again, Google knows where those numbers are being forwarded to. If you have multiple locations for a single business, each location should have a unique phone number. Use that location's number in the Places/+ Local listing, and make sure that the URL on the listing is pointing to a unique landing page for that location that has the same unique local phone number.