Greenhouse Foundation Planner
Organize a manufacturer base footprint and a separate working-space allowance without inventing structural details.
Your planning estimate
Enable JavaScript to run this calculator. The formula and assumptions are available below.
How this tool works
Enter base dimensions from the exact model drawing, not a rounded product name or maximum outside dimensions. The diagonal is an arithmetic reference for the entered rectangle; it is not an installation tolerance or certification.
Base area = width × length. Diagonal = √(width² + length²). Working zone = (width + 2 × clearance) × (length + 2 × clearance).
What this estimate does not tell you
This planner does not specify slab thickness, footing depth, concrete strength, reinforcement, anchor size, anchor edge distance, wind resistance or snow capacity. Resolve those with the current manufacturer documents, local authority and qualified professionals. Check access, buried services, drainage and applicable setbacks before any ground work.
Before construction: a documentation checklist
- Match model, size and revision to the quotation and installation drawing.
- Confirm base dimensions, anchoring details and what the kit includes.
- Check local permissions, setbacks, soil conditions, drainage and underground services.
- Have the required foundation and structural details resolved before ordering materials.
- Plan door access and installation space separately from the engineered base.