At a meeting of Allerdale's development panel on Tuesday, councillors voted unanimously in favour of owner Kevin Thompson's application to partially demolish the grade two listed building and convert it into two houses and four flats.
Some outbuildings would also be demolished as part of the development.
Approval was granted with the condition that the final height of a wall which would be affected by the work must be agreed first.
Outline planning permission to build 124 homes was also granted subject to the same condition.
Doris Riley, of Ewanrigg Hall Gardens, said at the meeting that she did not actually object to the plans other than that she did wish for the height of the wall to be maintained.
She added: "I think Maryport should be proud of their heritage so I'd like the walls to remain beautiful."
Councillor Jim Lister agreed and moved to approve the plans to convert the hall, subject to the condition that the final height of the wall be agreed first.
Councillor Nicky Cockburn seconded the motion.
Coun Cockburn then moved to approve the application to build 124 homes, subject to the same condition.
Councillor Malcolm Grainger seconded the motion.
During the consultation period, Maryport Town Council members said they would like to see the outside of the hall restored and the development to take place behind that.
The county archaeologist did not object to the plans but said the buildings and any archaeological assets should be recorded before the development.
They also recommended an inscribed lintel with the date 1753 and the dressed stone on the facade should be conserved.
Historic England said it supported the principle of reusing and repairing the listed building.
The Georgian group objected to the plans because it didn’t believe Mr Thompson had provided justification to demolish part of the building’s original façade.
One letter of objection was received due to road traffic safety while another was pleased to see the hall reused but did not want the rear boundary wall to be reduced in height.
The hall was ravaged by fire in August, which destroyed the roof and first floor.
The hall once belonged to the Christian family, relatives of Bounty mutineer Fletcher Christian, and is one of the town’s most historic buildings.
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