Listing

[Trevor81]

I’ve been hosting one room for about three years and now I have another double room available in the same house. How does Airbnb take a booking for this extra room

[Helen3]

Add another listing and link the two @Trevor81 

See Airbnb Help for details on how to do this if you can't find the add a listing on your profile. 

[Mike-And-Jane0]

@Trevor81 Add another listing but don't link the two.

Or add

listing 1 original bedroom

listing 2 new bedroom

listing 3 two bedrooms

and then link the calendars of listing 1 and 3, and listing 2 and 3 to stop multiple bookings.