Like tenant cannot _____ (paint, remove/attach fixtures) etc without written consent.

You will be asking about a zoning variance (first option) and then the lesser degree of use, a special use permit allowing a change of use for the current owner, a variance may run with title increasing the value of your property.Your chances of getting consent may depend on a buffer area, space or distance from other properties.

All of these were done without the signature or consent of the father(co-signer).  

Hi Lynn, my lease states that an inspection should be during reasonable hours and with tenant's consent, which shall not be unreasonably withheld, but it mentions no specific hrs like yours that gives them 48 hrs.  

For example, if a Boxer property management team wanted to upgrade a building with infrastructure to get LEEDs certified (green building, energy efficient, etc) , would they be able to design and approve a project without consent of investors? 

If they are simply fiscal guarantors, they need not be informed (unless their child is under the age of majority) ... in this instance, it is still best to inform them, but you will need the consent of the tenants to so do (we usually advise the tenants they should inform their parents).The only thing you can do in this situation is execute a Lease Amendment (in some jurisdictions this is a standardized document) removing the departed tenant form the lease.  

I doubt that any lender would agree to secure a loan against the property without both owner's consent.* * *One alternative would be an unsecured LOC that is thus not attached to the property.

Preferred and common shares seems could be used, transferred with unanimous consent would prevent stock transfers to unwanted stockholders, this can be done in an LLC with members, but not sure of the tax issues, if any, with transfer restrictions in a C corp. ?

Also make it clear to prospective tenants.SUB-LET: Resident may not sub-let the Premises or assign this Lease without the prior written consent of Management.

See below: CONSENT TO TRANSITION TOTRANSACTION BROKERFLORIDA LAW ALLOWS REAL ESTATE LICENSEES WHO REPRESENT A BUYER OR SELLER AS A SINGLE AGENT TO CHANGE FROM A SINGLE AGENT RELATIONSHIP TO A TRANSACTION BROKERAGE RELATIONSHIP IN ORDER FOR THE LICENSEE TO ASSIST BOTH PARTIES IN A REAL ESTATE TRANSACTION BY PROVIDING A LIMITED FORM OF REPRESENTATION TO BOTH THE BUYER AND THE SELLER.