A new holiday and caravan park will be be opened at the attraction, that will include timber lodges, safari tents and showmen's wagons for visitors to stay in.
The safari enclosure will be extended in the development which is set to create up to 30 new jobs at the site.
Pembrokeshire Council has given its approval for the development to begin.
Final approval has been given to plans for a £10m holiday village at Folly Farm in Pembrokeshire.