Gaining back control

[Christine Swaidan]

Senior apartments. Old style buildings with lobbies and internal hallways. Tenants have started hanging their own artwork on hallway walls and placing furniture along the walls in order to add their personal touches. Definitely a Goodwill thrift store look that I'm not loving. Currently I'm painting and doing new flooring plus new furniture in lobbies. I'm looking for help on how to word a notice that personal stuff must be removed and not be put back without offending anyone. 

Also having an issue with a number of tenants that have decided they want to "beautify" the grounds by adding plants and "working in the yard". 

I accept complete responsibility for allowing this to happen and not nipping it in the bud. Just looking for a way to gain back control of the situation without antagonizing good tenants.