12 Free DIY Greenhouse Plans

Stacy Fisher, Writer

Stacy is an expert writer for The Spruce covering home DIY projects and crafts. She has over 18 years of journalistic experience, appearing as a DIY expert on the Dr. Oz Show and several radio shows. She has published hundreds of articles and co-authored a book.

Updated on 02/02/24

dome greenhouse

There are plenty of ways to make a cheap, simple DIY greenhouse, whether you construct it from a kit or build it from scratch using one of these free plans. The result will be a homemade backyard greenhouse that allows you to grow your favorite flowers, vegetables, and herbs all year long.

Greenhouses provide seedlings and plants with warmth in the winter and cool in the summer, letting you participate in your favorite hobby every day of the year.

Building a DIY greenhouse is simple to do, regardless of the size you want or the budget you have. Here are 12 free greenhouse plans to get you started.

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Barn Greenhouse

Completed barn greenhouse with clear roofline.

This free greenhouse plan is for a barn-style greenhouse that will help you grow your plants while looking stylish with its sturdy corrugated metal and greenhouse plastic sides. You should choose this greenhouse if you're looking for a beautiful structure and have the land to do so. The free greenhouse plan includes photos, diagrams, a materials and tools list, written instructions, and videos. Barn Greenhouse from Ana White

GeoDome Greenhouse

A geodome greenhouse with plants inside.

Northern Homestead has shared its free plan for building its GeoDome greenhouse. Use this plan and you'll get a greenhouse that's lightweight yet secure, absorbs lots of light, has a lot of ground growing space, and one that makes quite the statement. There's a materials list, tools list, written directions, diagrams, and photos to help you build it. It also has other posts on its greenhouse about how to arrange plants within it, how to cover it, how to add a hot water tank, and more. GeoDome Greenhouse from Northern Homestead

Greenhouse With Sleeping Loft

Solar powered greenhouse that resembles a house.

If you're feeling ambitious, then this free greenhouse plan from Mother Earth News might be just for you. You'll get a completed greenhouse that's solar-heated and even has a sleeping loft, which almost makes this a tiny house. Scroll through the pages of this free greenhouse plan to find a materials list, images, and directions for building this great-looking greenhouse, all for under around $4,000 even with purchased materials and some hired helping hands. Greenhouse With Sleeping Loft from Mother Earth News

Polythene Greenhouse

A white shed on a wooden riser.

This free greenhouse plan by BuildEazy is conveniently built out of mostly 2-by-4-inch wood studs. Click through this free greenhouse plan to find shopping lists, directions, and diagrams. There are also photos of the greenhouses built by other readers who have used this simple greenhouse plan. Polythene Greenhouse from BuildEazy

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14-Foot Greenhouse

Illustration of glass greenhouse

HowToSpecialist has a free wood greenhouse plan that will only take you a few weekends to build. Included in the free greenhouse plans are a materials list, diagrams, tools list, and tips. 14-Foot Greenhouse from HowToSpecialist

Recycled Window Greenhouse

A greenhouse built out of recycled windows.

Instructables has a free greenhouse plan that uses a unique building material—old windows. It's one of the cheapest ways to build your own greenhouse if you can scavenge up a few windows that are about to be tossed. Use all different shapes and sizes to make a bold statement that really creates some interest. It creates a great-looking structure that's environmental and budget-friendly. There are lots of color photos and written instructions to help you build one for your yard. Recycled Window Greenhouse from Instructables

16-Foot Greenhouse

Illustration of a small greenhouse frame.

This free greenhouse plan by HowToSpecialist will give you everything you need to build a 16-foot-long greenhouse that's perfect for your backyard. You'll be able to grow your own vegetables, all year around with this DIY greenhouse. This free greenhouse plan includes lots of diagrams and illustrations along with written instructions. 16-Foot Greenhouse from HowToSpecialist

10-Foot Greenhouse

Illustration of a small greenhouse.

Here's another free greenhouse plan from HowToSpecialist. This plan for a small DIY greenhouse is perfect for a small backyard. If you'd like to have a bigger greenhouse, you can adjust these plans for your space. It's a pitched roof with a door, giving everything you need for a successful greenhouse. You can use the written instructions, materials, and tools list, as well as tips and diagrams to build this greenhouse. 10-Foot Greenhouse from HowToSpecialist

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Little Window Greenhouse

A small greenhouse made out windows in a backyard.

Make a DIY greenhouse cheap with free materials you thrift. This free greenhouse plan from Crafts a la Mode takes some old windows and makes them into a greenhouse just big enough for a few plants. It's a gorgeous greenhouse that doubles as yard decor. The best part is that you can easily add more windows to make this larger if you'd like. It's certainly a unique look that's going to look great in any yard. There are lots of photos taken along the way to show you how to build it. This is an easy project that even the beginner can handle. Little Window Greenhouse from Crafts a la Mode

Arched PVC Greenhouse

Illustration of an arched greenhouse plan.

Here's a free plan by PVC Plans for an arched greenhouse that uses PVC pipes. Download the free greenhouse PDF plan and you'll get a material list, diagrams, and written directions. This is a great starter greenhouse if you're just starting to experiment with growing in a greenhouse. PVC pipes are also pretty affordable and using them is a budget-friendly way to build a greenhouse. This greenhouse is arched and includes two doors, one in the front and one in the back. Arched PVC Greenhouse from PVC Plans

32-Foot Greenhouse

Row of potted tomato plants inside a greenhouse.

FloridaGardener.com has a bigger greenhouse plan that you can print and use for free. A combination of wood and PVC pipes are used to build this large, hooped greenhouse that's 32 feet by 10 feet by 10 feet. There's plenty of room for all your plants and vegetables and you won't have to worry about outgrowing this greenhouse anytime soon. 32-Foot Greenhouse from Florida Gardner

8-by-10-Foot Greenhouse

A completed wooden framed greenhouse

BuildEazy has another free DIY greenhouse plan, this one builds a large 8-by-10-foot greenhouse that you'll be able to fit all kinds of plants into. There are 13 pages in this free plan that includes drawings, photos, diagrams, and instructions on how to build it. 8-by-10-Foot Greenhouse from BuildEazy

Is it better to build your own greenhouse or hire a professional?

The answer will depend on how customized and large you want your greenhouse to be. Many hardware stores sell building kits for standard greenhouses you can build yourself. If you want something bigger or more customized, you may want to hire a professional.

What is the most inexpensive way to build a greenhouse?

The most inexpensive way to build a greenhouse is to purchase a standard greenhouse-building kit from a hardware store.

Where is the best place to put a greenhouse?

The best spot for a greenhouse would be either on the south or southeast side of your home since this usually receives the most sun during the winter months.

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