Stage 2
Engineered Drainage Solution - Additional Engineering Plan & Certificate Cost: +$1,650
DA Approval must be sought from your Local Council - Additional Approval Cost: +$9,000
Detail Survey by a Registered Surveyor needed - AHD Survey Cost: +$300
Deeper Piers must be designed by a Civil Engineer - Detailed Engineering & Certificate, & Sydney Water Approval Cost: +$2,200
Concrete Encasement is required- Detailed Engineering & Certificate, & Sydney Water Approval Cost: +$2,200
Design and Submission Cost: +$4,980
Custom Granny Flat Design is needed - Cost: +$660
Learn more about our custom designed granny flats here