The RNLI are proposing to build a new lifeboat station on the town's Castle Hill to house one of its new generation of FSB2 sea-going lifeboats.
Mr. John Griffiths, of the National Park's planning department, informed members of its development control committee on Wednesday that the authority now accepted the principle of the application, its location, and the inclusion of all the facilities requested by the RNLI.
"However, we would like to look at the design of the building again to see if we cannot improve the elevation," he said.
Mr. Griffiths said that the proposal seemed to have a 'split personality' in that the RNLI were trying to achieve both a 'sturdy boathouse and a public building'.
He explained that the National Park were working with the RNLI to reduce the impact of the building by "getting more of a curve to the roof."
Also being looked at were the materials proposed, the fenestration and the colours.
"We are also looking at a way for bringing the slope of the slipway up into the building to create more shape throughout," he added.
Both the Park's planning department and the RNLI were working on sketches which he proposed to bring before the next meeting of the authority in October and he requested that the matter again be deferred.
Mr. Elwyn Owen agreed with Mr. Griffiths's suggested approach.
"Seeing the observations and letters, I think we are right as a committee to think carefully about the design of this building," he said. "Things seem to be going in the right direction."