Help with tenants regarding commercial signs
Hi all,
I purchased my first commercial retail property and I'm looking to renovate the exterior.   Some of my tenants aren't too happy about the idea.  One in particular has this really large ugly sign that due to its conspicuous ugliness, actually draws in a fair amount of business.  I'm looking to upgrade all of the signs to higher quality versions along with the rest of the exterior upgrades.  

So my question is, can I force them to buy new upgraded signs when I upgrade the building? If so, is there a good way to do it?  

All of my tenants have the standard AIR leases that have a clause that allows the landlord to make changes to common areas at his/her own discretion. There is also a clause in their leases that states: "Lessee shall not place any sign upon the project without lessors prior written consent. All signs must comply with applicable requirements"
[{"id": "cv3ym3t", "text": "well did the last owner give permission?", "replies": [{"id": "cv40ube", "text": "The last owner didn't give any permission other than what is written in the lease.  The sign was approved by the city. But regardless, I want all signs on the building to upgrade. ", "replies": [{"id": "cv44wi0", "text": "Was the tenant allowed to get a sign permit without the owners authorization? In cities I have dealt with they require owner approval if they aren't the registered owner. Their consent to the permit would be consent to the sign. \n\n", "replies": [{"id": "cv4dhj0", "text": "I'm not sure, he got the sign when the previous owner had the property. ", "replies": [], "depth": 4}], "depth": 3}], "depth": 2}], "depth": 1}, {"id": "cv41qed", "text": "Is there anything in the lease about Landlord sign criteria? I just used that to standardize the signs for ALL tenants at a property during a redevelopment, to make them all uniform... but I as the landlord had to pay.", "replies": [{"id": "cv42gb6", "text": "Nothing, other than limiting their location to their storefront only. ", "replies": [], "depth": 2}], "depth": 1}]