Free planning tool
The kit price is not the project price. Set the greenhouse you want and the work your site needs. You will get a size recommendation, a low-to-high range for the scope you included, and a plain list of what is still outside the estimate.
Reviewed July 12, 2026
Now set the project scope. These choices decide which work is included in the range and which work is listed separately.
0 of 8 choices answered. Your estimate appears after the last choice.
The result is open and needs no email. Finish the eight choices to see the project range and every exclusion.
The model first keeps the calculator's existing structure, base, automatic ventilation, and heating ranges. It then adds only the project-scope allowances you select. The total is the exact low and high sum of included lines. No excluded line is hidden inside it.
The added scope bands are deliberately broad because labor rates, trench length, soil, access, and local fees vary. They are Greenhouse Guide editorial planning allowances effective July 12, 2026, not official quotes and not figures endorsed by the sources below.
Source: Greenhouse Guide editorial planning allowances. Effective date: July 12, 2026.
Verify structure pricing with the seller, site and assembly work with local contractors, utility work with licensed trades, and permit or HOA fees with the authority that controls your property.
These primary sources explain why site conditions, anchoring, ventilation, heating, wiring, and local checks matter. They do not validate the dollar edges in the editorial allowance bands.
Keep the structure, base and anchoring, automatic ventilation, heating equipment, site work, assembly, utility runs, and permit allowance separate. That shows which scope creates the total and which seller quote is actually complete.
A fixed roof vent or louvre is only an opening. A temperature-sensitive opener moves the vent while you are away, and low louvre vents provide the inlet air. A door helps when it is open, but it is not automatic ventilation.
Check grading, drainage, assembly access, power and water distance, local permits, setbacks, and HOA rules. Select known scope here and keep every uncertain line visible under Not included in this estimate.