hi tone, maybe some other members here can give you a concreat advice on these matter. but based on what we did since my hubby is the sole owner of the house and so we just submitted every piece of doucuments to confirm his ownership.i guess being the sole owner will not raise any conflicts or question from the ECO compare to a property with 2 names or more on it.i guess it doenst matter if the house is new or old what matters is you have to suplly evidence that when your fiancee or spouse arrive in UK she has a decent and suitable accomodation.