FWIW give them your What3words.com** - 3 word locations. If your back door is preferred you can specify that if it is more than 3 metres away from the most obvious door.

w3w uses Goggle & streetview, so there is no excuse if they are prepared to use the w3w - and if they are anay good they will have that as their back-up, because with awkward sites you can see the road/entrance. Or at least a view from within the last 10 years.

** replace "///slab.strikers.dented" with your town, click on the 3 word below & scoot around for your location. w3w are advertising on telly, and the UK emergency services recognise the 2 words now. AND its a British invention (even if on the back of Goggle).