There are certain items needed for building the Growing Dome kit that are very bulky, costly to ship, and inexpensively available at your local building supply store. These items are not included in the Growing Dome kit to help lower the final cost. Most materials are easily found at your local hardware supply store, but the sheet metal can be found at a heating & air conditioning (HVAC) or sheet metal supply store.
Overview of Items Needed
- Three-quarter minus gravel for the foundation
- Forms and concrete for concrete foundations only
- Rigid foam board insulation for the foundation wall
- Sand, sheet metal, and lumber for the water tank
- Four-inch corrugated drain pipe with sediment sock for the Undersoil System
- Ladders and/or scaffolding (can be rented)
Estimated cost of Owner Supplied Items
Actual expenses will vary depending on location, foundation type, and price changes in raw materials.
- 15’ Growing Dome +$1,220
- 18’ Growing Dome +$1,530
- 22’ Growing Dome +$1,760
- 26’ Growing Dome +$2,130
- 33’ Growing Dome +$4,260
- 42’ Growing Dome +$4,830
Owner Supplied Items List
| Gravel Ring Foundation | Concrete Pier Foundation | Insulated Concrete Form (ICF) Foundation |
| 15′ Gravel Ring OSL | 15′ Concrete Piers OSL | 15′ ICF OSL |
| 18′ Gravel Ring OSL | 18′ Concrete Piers OSL | 18′ ICF OSL |
| 22′ Gravel Ring OSL | 22′ Concrete Piers OSL | 22′ ICF OSL |
| 26′ Gravel Ring OSL | 26′ Concrete Piers OSL | 26′ ICF OSL |
| 33′ Gravel Ring OSL | 33′ Concrete Piers OSL | 33′ ICF OSL |
| N/A | 42′ Concrete Piers OSL | 42′ ICF OSL |