Selling a portion of our title

In a small happy block of 4 apartments in NSW we are thinking of selling our on title, unused lap-pool to our lovely neighbours who could then combine it with their on-title, lap-pool to create one usable sized pool. We have to take the lift down from our apartment to get to our pool and therefore never use it but the neighbours walk directly out onto their pool terrace and use theirs all the time. We would offload a maintenance headache and cash drain and having the whole ground floor area and a full size pool would really enhance their property. Noise is not an issue and we don’t intend to move for at least 5 years. Discuss!