Assume your rooftop deck will require detailed plans and a permit. Depending on the scale this could range from $10k-$50k for plans and permitting alone. Labor costs are typically elevated due to higher installation risk and long-term liability, plus the contractor to complete the project must be specialized.
β You will likely require deep coordination with a structural engineer and you may be required to make structural upgrades to your home (e.g., heavy beams or supporting columns).
π© Rooftop plants often have lower success rates due to limited soil, concentrated sun or heat, and wind exposure.