A garden office, sitting on their actual lawn
This is a five figure purchase made from a brochure photograph. Let them walk round it first.
Choose a size
Drag to walk round it
Opens your camera. Point it at the lawn and step back.
Once it appears: one finger drags it, two fingers turn it. It does not need a clear floor. Drop it where it fits and judge the size against what is already there.
Will it go up without permission?
Outbuildings have their own rules, and the one that catches people is the height limit near a boundary.
Let them scan it and hold their own phone up
The camera view only works on a phone. Point the code at their camera, and this page opens on their handset. That is the moment the idea sells itself.
Permitted development rules for outbuildings apply to houses in England and were current at the time of writing. Rights are restricted in conservation areas, National Parks and Areas of Outstanding Natural Beauty, on listed buildings, and where an Article 4 direction applies. Outbuildings must be incidental to the enjoyment of the house. Confirm with the local planning authority before ordering.