DIY Greenhouse Plans PDF | 9x12 Lean-To Backyard Greenhouse | Step-by-Step Building Guide with Materials & Cut List

Build your own backyard greenhouse with these DIY 9x12 lean-to greenhouse plans (PDF download). Designed for home gardeners and DIY builders, this step-by-step guide makes construction simple and affordable. 

Inside, you’ll get professional-grade drawings, 3D diagrams, complete material and cut lists, tool recommendations, and clear assembly instructions. The plans include options for shelving, vent windows, and flexible roof coverings. 

Perfect for vegetables, herbs, or flowers, this sturdy greenhouse design is beginner-friendly, fits against fences or garages, and can be adjusted to 9x12, 9x10, or 9x8. Build it in about 6 days with standard lumber from Home Depot or Lowe’s.

Key Features:

• 9x12 lean-to design with 7’-4” to 9’-8” sloped roof 
• Strong 2x4 frame + 2x6 rafters for durability 
• Built-in 2-tier shelving for vertical growing space 
• Climate-control ready (vent windows, auto-openers) 
• Beginner-to-intermediate skill level, ~$1,100 est. build cost

This isn’t a generic sketch—it’s a tested, optimized greenhouse blueprint that removes the guesswork. With instant download and lifetime email support, you’ll have everything you need to build with confidence.

👉 Download your greenhouse plans today and start growing year-round! 

How do I get my plans after purchasing? 

When you purchase a plan from our store, you will instantly receive a download link via email. Just click the “View content” button to go to the product’s download page. (Make sure you enter the right email address so you can receive the plans.)