To ask the agency this....

[OurMiracle1106]

Please may I paint my balcony wall white. To paint the decking with cupinol and the top bricks black? I will use masonry paint and don't expect them to pay for the materials. I am happy to do it myself. I just want it looking nice out there?

AIBU to at least ask if I am permitted to? I don't see it would reduce the value of the property

How could it be unreasonable to ask? It would (probably) be unreasonable to do it without asking, or to do it after they have said "no". But how on earth can it be unreasobnable to ask?

It's always worth a try. I allow my tenants to paint the internal walls their preferred colour at their own expense. I send in decorators with magnolia when they leave to freshen up for the next tenants so it's of no consequence to me and keeps the tenants happy. I'm of the belief that tenants who have an input into the property are more inclined to look after it.