The £100m Salterns Marina regeneration will include building a new luxury hotel with spa on the site of the current hotel with panoramic views of the famous harbour.
More than 70 apartments will also be constructed, while the berthing and marina facilities will be reconfigured.
The development is spearheaded by property specialist Richard Carr, who is acting on behalf of Salterns Marina.
He said: “The directors of Salterns Marina are very aware that the facilities are now over 40 years old and that the hotel is even older.
“They believe that the time has come to give Poole a world class marina, a new hotel, spa and a high quality restaurant overlooking our magnificent harbour.
“The timing is perfect especially with Rick Stein’s restaurant coming to Sandbanks in the near future.
“The new Hilton hotel has recently been unveiled in Bournemouth, but this development is very much in the Poole style of surf, rest and play!”