A new contractors' site compound will be set up south of the Bacton Gas Terminals while asset management and maintenance work is carried out over a two-year period.
It will include the siting of container-style temporary buildings for use as offices, storage and staff facilities.
There will also be a car parking area, areas for material storage and storage tanks.
The application submitted by J Murphy and Sons Ltd was unanimously approved at North Norfolk District council's development committee meeting on Thursday, February 22.
Up to 20 employees will work on the site in Paston Road, which is currently used as agricultural land, and lies next to the southern boundary of the National Grid terminal.
The plans were approved despite objections from some residents and the highways department.
The meeting heard that the terminal, which is protected by a 24-hour armed police patrol, supplies a third of the UK's gas supply.
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