Build a Greenhouse From Old Windows

Repurpose old windows to create a beautiful greenhouse and save money while going green. Make use of these old window greenhouse plans!

By Spike Carlsen
Updated on July 18, 2023
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by William D. Adams
Brian Koehl crafted this greenhouse out of salvaged windows, opening up the opportunity to create a beautiful and useful space while giving building materials a second life.

Repurpose old windows to create a beautiful greenhouse and save money while going green. Make use of these old window greenhouse plans!

You can spend $50,000 for an upscale curved-glass greenhouse, or $50 for a down-home one made of PVC pipe and plastic sheeting. But there’s a lot of ground in between. Here, we’re going to explore the option of using upcycled windows, doors, and other materials set in a wood framework to create a functional, sturdy greenhouse.

We won’t provide exact plans for this greenhouse; each will be different depending on the size and type of windows and doors you track down. But we will provide general plans for building an all-in-one rafter and wall system that will provide a basic greenhouse structure for you to “fill in the blanks” with windows, doors, and treated plywood.

We all know the equations for using building materials: Recycled stuff equals lower cost and more labor, while store-bought stuff equals higher cost and less labor. But there are other factors we should add to the recycled-stuff side of the equation: It’s better for the environment, it’s more fun, your project will be uniquely yours, and you’ll wind up with more bragging rights.

With most projects, you start with a firm plan, and then obtain the needed materials. In this case, you’ll start by obtaining the materials, and then create a plan based around your newly found treasures.

Parts, Materials/Dimensions, Quantity

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