Dog stairs into window

I got a set of stairs built for the dog in the window about 2 years ago, only freshly painted it and put carpet on in may, cost over 400€. I’m Getting a new window box built for her instead for more space. It has a door with storage in the back. It’s immaculate. It’s 110cm tall & 116cm long before the platform & 50cm wide & the platform is 55cm long & 61cm wide Smoke free spotless ladies home, no dog hair as she doesn’t shed. She’s a shihtzu who is washed once per week & she always slept in her bed so she never actually lay on the carpet. Would need a van to collect.