Here’s a tip most people skip: the frame matters way more than the covering. Spend your money on sturdy joints and corners, then cover with whatever plastic or fabric you can find, lol!
That one shift changes how you plan the whole project. It also means a greenhouse can cost almost nothing if you build the bones right.
Read also: 17+ Budget-Friendly DIY Garden Projects On A Budget
This list pulls together 20 different ways to get a working greenhouse without the big price tag. Some use scrap wood.
Others use old windows, pipes or even bottles.
You don’t need carpentry skills for most of these. A weekend, some basic tools and a little patience gets you surprisingly far.
Scroll through and see which structure fits your yard and your budget. Some are tiny herb shelters. Others are big enough to walk into!
Under each idea you’ll find the small details that actually matter, plus a link to the full tutorial so you can start building right away.
CHEAP GREENHOUSE PLANS
PVC Pipe Greenhouse Frame
PVC pipe might be the most forgiving material on this entire list. It bends into arches easily and connects with cheap fittings from any hardware store.
Read also: 20+ Genius Easy Tomato Cage Ideas That Skyrocket Harvests
This frame style works for small beds or long rows. Add plastic sheeting over the top and you’re basically done, haha!
Wooden Pallet Greenhouse Build
Got old pallets sitting behind the shed? Turn them into greenhouse walls instead of hauling them to the dump.
The gaps between slats let in extra light, which is honestly a happy accident. Stack a few and you’ve got a frame with almost no lumber cost.
Old Window Greenhouse Design
Old windows turn into a greenhouse with real character. Mismatched frames and glass panes give the whole structure a patchwork charm that new materials just can’t fake.
Read also: The Best 12+ Greenhouse Ideas You Need to See
Salvage yards and demolition sites are goldmines for this. Each window becomes its own little wall panel.
Budget Hoop House Tutorial
Hoop houses are basically the workhorse of budget growing. Metal or PVC hoops covered in greenhouse plastic protect rows of plants without a huge investment.
This design is quick to put up and just as quick to take down. Good for renters or anyone who moves plants around seasonally.
Mini Greenhouse From Scraps
Not every greenhouse needs to be big. A mini version built from leftover scraps works perfectly for starting seedlings on a porch or patio.
Use whatever wood or plastic is already lying around. This is the project for using up the odds and ends nobody wants to throw out.
DIY Greenhouse With Tarp
A tarp stretched over a simple frame is about as budget as it gets. Heavy duty tarps hold up surprisingly well against wind and rain.
Grommets along the edges make it easy to tie down. This one’s great for a first attempt at greenhouse building, lol!
Repurposed Ladder Greenhouse Shelf
An old ladder makes a surprisingly sturdy shelf inside a greenhouse. Lean it against a wall and lay boards across the rungs for staggered plant levels.
This trick saves floor space, which matters in a smaller structure. Every level gets its own light exposure too.
Simple A Frame Greenhouse
The A frame shape sheds rain and snow without any extra design work. Two angled sides meeting at a peak keep the structure simple and strong.
Cheap lumber and clear plastic sheeting are really all you need. This shape also looks tidy sitting in a backyard corner.
Plastic Bottle Greenhouse Walls
Plastic bottles stacked and wired together create insulated walls unlike anything else on this list. Sunlight filters through in a soft, speckled way that’s kind of fun to see.
Collecting enough bottles takes patience, but the material cost is basically zero. Rinse them out first or the smell sticks around, haha!
Cattle Panel Greenhouse Idea
Cattle panels bend into a strong arched frame that holds up in wind. Farmers have used these for years, and gardeners caught on for good reason.
Cover the arch with plastic sheeting and anchor the ends well. This design handles bigger spaces better than most budget builds.
Cinder Block Greenhouse Base
Cinder blocks make a solid, no-nonsense base for a greenhouse frame. Stack them without mortar for something you can adjust later if needed.
The blocks also hold heat, which helps on cooler nights. Fill the centers with soil and you’ve even got built-in planters along the base.
Read also: 19+ Genius Cheap Gardening Ideas That Transform Yards
Recycled Door Greenhouse Frame
An old door laid on its side or standing upright becomes a surprisingly strong greenhouse wall. The existing frame gives you a head start on structure.
Glass panel doors let in extra light. Solid ones work fine too if you just need a windbreak on one side.
Small Backyard Greenhouse Kit
Small kits exist for a reason. They come with pre-cut pieces so there’s less guesswork involved, which is nice if you’d rather skip measuring twice.
These fit neatly into a backyard corner without taking over the whole yard. Assembly usually takes an afternoon, not a weekend.
Low Cost Lean To Greenhouse
A lean to greenhouse uses an existing wall as one full side, cutting material costs significantly. Your house, shed or garage does half the structural work for you.
Read also: 17+ Stunning Greenhouse Interior Ideas That Transform Gardens
This design also holds heat better since it’s partially sheltered. Not a bad trade for so little extra building.
Foldable Greenhouse On Wheels
Wheels turn a greenhouse into something you can chase the sun with. Roll it to a sunnier spot in the morning, then tuck it away by evening.
This one folds flat for storage too. Great for small patios where space is tight.
Greenhouse Made From Bamboo
Bamboo brings a natural, almost woven look to a greenhouse frame. It’s lightweight, strong and often cheaper than milled lumber depending on where you live.
Lash the poles together with twine or wire for flexible joints. This build has a rustic quality that’s hard to get from plastic pipe.
Vertical Greenhouse For Small Yards
Small yards do not rule out growing space. A vertical design stacks shelves or tiers upward instead of spreading out sideways.
This is the plan for anyone working with a narrow side yard or a tiny patio. Every tier gets its own dose of sunlight.
Greenhouse Using Old Shelving
Old shelving units, especially metal wire ones, convert into a greenhouse frame with almost no modification. Wrap the sides in plastic sheeting and you’ve got instant shelving inside a mini structure.
Read also: 20+ Farm Compost Ideas That Slash Your Waste
This is one of the fastest builds on this whole list. Perfect for someone who wants results this weekend, not next month.
Simple Dome Greenhouse Design
Dome shapes distribute weight evenly, which helps in snow or heavy wind. The curved design also looks pretty striking sitting in a yard, honestly.
Simple dome kits use short struts connected at angles. This build takes a bit more patience but pays off in stability.
Budget Greenhouse With Row Covers
Row covers are the lightest, cheapest option here, and sometimes that’s exactly what a garden needs. Lay fabric over hoops or stakes for basic frost protection.
Not every plant needs a full structure. Sometimes a simple cover does the job just fine, lol!
This wraps up the list, so pick whichever build fits your space best.
Just a little note - some of the links on here may be affiliate links, which means I might earn a small commission if you decide to shop through them (at no extra cost to you!). I only post content which I'm truly enthusiastic about and would suggest to others.
And as you know, I seriously love seeing your takes on the looks and ideas on here - that means the world to me! If you recreate something, please share it here in the comments or feel free to send me a pic. I'm always excited to meet y'all! ✨🤍
Xoxo Camille