Not in any state that I know of. Most state codes require that the landlord provide a mailbox, and locking it would be a breach of quiet enjoyment.
can a landlord change the locks on a commercial building without notice
Not in any state I know of.
No, a landlord cannot change the locks for abandonment if the tenant has not moved out of the rental property. Changing locks without proper legal process could be considered an illegal eviction and may expose the landlord to legal consequences.
No. Unless they gave you a new key.
I can only answer for Massachusetts, but I think you can. The landlord has a right of entry, but he should get the permission of tenant, and the tenant has a right to be there at the time. If the landlord needs to get in during an emergency, perhaps he should be calling the police.
You need to check with the landlord about that. You cant just change the locks on a property that you do not own.
A landlord could get in trouble with the husband for changing the locks, but that seems unlikely, especially with a letter from the wife asking that they be changed. There is also no reason why the wife cannot change the locks herself.
AnswerYou should check your lease. In addition, generally a landlord has the right of access in an emergency. You need to check your local landlord/tenant laws.
Yes. The building belongs to the landlord and needs the key in case of an emergency, or if a tenant abandons the property. Also, you should probably check with the landlord prior to changing locks. There might be a clause in the lease stating that only the landlord can change a lock, not the tenant.
Not in most states.
Matters such a locks are usually covered in a written lease. If it's not covered or if there is no written lease you probably can. BUT, you must give the landlord a key. The landlord has the right to enter in an emergency and upon reasonable notice to the tenant to inspect the premises. Keep in mind that landlord / tenant relationships without a written lease are generally governed by state law, so the conclusion may differ from state to state. When I was a landlord, there was an option to change the keys for a tenant. I had it done at my cost and held a key. Most locksmiths will not change the keys if you do not own the home. In many commercial leases the tenant is EXPECTED to change the locks and the landlord may not want to even have a key. For example, when renting a self-storage unit, the tenant would typically add his or her own lock to the unit. Upon default or emergency, the landlord would simply break the lock to gain entry, then put on a new lock.
Not in most U.S. states.