How much does it cost to build a greenhouse? That’s a common question that we get all the time from homeowners and garden lovers. There’s a ton of interest in growing your own fruits, vegetables, and even plants. It’s becoming more and more common to see greenhouses in your neighbors’ yards, and for good reason.
Building one isn’t as quick and easy as just putting up some plastic and a little bit of wood. You’ll have to do some planning so you can know the size you need and where to put it. You’ll also have to budget for it. In this guide, you’ll learn how much it costs to build a greenhouse, the costs to buy one, the different types, and how to build one yourself!
Why Should You Get a Greenhouse?
Greenhouses have a lot of appeal. A greenhouse gives you a specific spot to grow the things you love, any time of year, because it protects your plants from cold, pests, and strong winds. Plus, it allows you to do the following:
- Extend your growing season through the winter
- Start seedlings early and grow delicate varieties
- Experiment with plants that don’t thrive in your region
- Enjoy better yields with temperature and humidity control
Some of us also just enjoy the peace of being surrounded by plants in a quiet, cozy space.
What’s the Real Value?
Building a greenhouse is about more than just the joys of gardening. It’s saving you money in the long run by lowering grocery costs and minimizing waste. You’re no longer at the mercy of store prices or short growing windows. Plus, it can be really nice mentally.
Not to mention, in case you ever decide to sell the property, a clean and functioning greenhouse can help it stand out, particularly in extremely competitive markets wherein such unique features may add curb appeal and intrigue to prospective buyers.
How Much Does It Cost to Build a Greenhouse?
The question everyone asks before getting started is How much does it cost to build a greenhouse? Well, the answer really depends on several important details, like the size you want, the materials you choose, and if you’re going to do the work yourself.
Here’s a general breakdown of greenhouse cost per square foot:
- Basic DIY hoop house: $5–$10 per sq. ft.
- Mid-range designs (A-frame, Gothic arch): $10–$25 per sq. ft.
- Custom or luxury greenhouses: $25–$35 per sq. ft.
Let’s say you want something small, maybe 200 square feet. You could spend anywhere from $1,000 to $7,000, depending on how fancy you want to get. A larger setup around 1,000 square feet could run $5,000 to $35,000. That’s a wide range, so greenhouse cost really depends on how much you plan to grow and how elaborate the build is.
In areas with stricter building codes or higher labor prices (like California), expect greenhouse costs to lean toward the higher end.
Types of Greenhouses
While you’re trying to figure out how much does it cost to build a greenhouse, the best place to start is to determine what your design options are. The structure you choose will make a huge difference in your overall greenhouse cost, how much growing space you get, and how much it can handle your specific climate. Let’s walk through some of the most popular types of greenhouses and what you can expect in terms of price, performance, practicality and anything else you need to know about.
1. Hoop-Style Greenhouses: Simple, Effective, and Budget-Friendly
If you’re looking for a low-cost way to extend your growing season, a hoop greenhouse is one of the easiest builds out there. Picture a half-circle tunnel stretched over a garden bed—simple, affordable, and functional.
What it’s made of:
Most hoop houses are built using curved metal pipes or plastic tubing (like PVC) and covered with greenhouse-grade polyethylene sheeting. They’re lightweight and easy to put together.
What it’s good for:
- Great for beginners or seasonal growers
- Perfect for protecting crops from early frost
- Easy to take down or expand
Expected greenhouse cost:
You’re looking at about $5 to $10 per square foot, depending on the materials you use and the size you build. If you’re comfortable with tools, you can likely assemble one in a weekend.
2. Rooftop Greenhouses: Gardening Above the City Hustle
Urban gardeners, this one’s for you. Rooftop greenhouses are making waves in dense city areas, where ground space is limited but rooftops go unused. If you’ve got access to a flat roof with good sunlight, this could be your chance to grow food just steps away from your kitchen.
What it’s made of:
These setups usually include a lightweight frame made of aluminum or steel, and polycarbonate panels or heavy-duty plastic. They’re designed to be lighter than traditional builds to avoid stressing the roof structure.
Why people love them:
- Ideal for apartment dwellers or urban homesteaders
- Great way to grow herbs, greens, or tomatoes in tight quarters
- Helps insulate the building below
Estimated greenhouse cost:
On average, $10 to $20 per square foot. The higher cost often comes from needing permits, reinforcements, or rooftop-safe materials. But for city living, the convenience can be worth it.
3. Geodesic Dome Greenhouses: Built to Withstand the Elements
If you’re in an area where wind, snow, or harsh weather are a concern, a geodesic dome might be the answer. These rounded, dome-shaped greenhouses are both strong and energy-efficient.
How it works:
The dome design helps sunlight move evenly across your plants. The curved walls also shed snow and resist wind pressure better than traditional square shapes.
Why go this route:
- Durable in extreme climates
- Unique look that stands out
- Excellent heat distribution
Greenhouse cost range:
Expect to spend around $10 to $25 per square foot, depending on the materials and size. If you’re a hands-on builder, you can buy geodesic greenhouse kits or plans online and build it yourself to cut costs.
4. A-Frame Greenhouses: Tall, Strong, and Ideal for Snowy Areas
Want something that looks good and handles winter like a champ? A-frame greenhouses check both boxes. These triangular structures are tall in the center and great for climates that get snow or heavy rain.
Materials to consider:
You can build one using wood, PVC, steel, or aluminum. If you want a permanent, classic look, glass is also an option—but it’s heavier and more expensive.
What makes them popular:
- The steep roof sheds snow easily
- Plenty of vertical space for tall plants or hanging pots
- Looks sharp in backyard gardens or on larger properties
Greenhouse cost estimate:
If you’re using standard materials, expect $25 to $35 per square foot. If you’re going for a glass A-frame or adding upgrades like heating systems, the cost can climb. But for many of us, the trade-off is worth it—these greenhouses last.
Can You Just Buy One Instead?
Yes, and for some of us, buying a pre-built greenhouse is the better route to go and makes more sense.
Here’s what buying a greenhouse might look like:
- Small kits (walk-in size): $300–$1,000
- Medium-sized freestanding greenhouses: $2,000–$8,000
- High-end glass greenhouses: $10,000 and up
Many of these kits come ready to assemble with all materials included. If convenience and time matter more than customization, this might be your route.
Keep in mind, buying might still come with added expenses, like site prep, anchoring the structure, or adding utilities if you want heat, water, or lights.
How to Build It Yourself
If you’re handy or up for a DIY challenge, building one yourself can be a fulfilling (and cost-saving) experience. Here’s how we’d approach it:
- Find the Right Spot
Look for full sun exposure; 6 to 8 hours a day is ideal. - Pick the Right Size
Think about how much space you have and what you want to grow. - Choose Your Frame Material
Options include wood (classic but needs maintenance), aluminum (lightweight and rust-proof), or PVC (cheap and easy to cut). - Select Your Covering
Glass offers durability and clarity, but is heavy. Polycarbonate panels give better insulation. Plastic film is the cheapest but has a shorter lifespan. - Ventilation and Heating
Add vents, fans, or heaters depending on your climate. You’ll need airflow to prevent mold and overheating. - Interior Layout
Use shelving, raised beds, or hanging baskets to maximize your growing space. - Optional: Automation Tools
Timers, thermostats, and irrigation systems can help you manage the environment more easily.
Building a Small Greenhouse?
Getting started is easier than you think. You can do it with less than a full backyard to get started. A small greenhouse can fit on a patio, against a wall, or even in a corner of your yard.
Ideas for small builds:
- Use old windows or salvaged materials to create a rustic look
- Create a simple hoop tunnel with PVC and plastic sheeting
- Build a cold frame, a mini greenhouse that rests on the ground
We’ve seen people build one for under $200 using repurposed wood and clear film. It’s a great option if you’re trying greenhouse gardening for the first time.
Things That Can Add to Greenhouse Cost
It’s easy to forget the extras. Here’s what might increase your total greenhouse cost:
- Site preparation (leveling, drainage)
- Permits, especially in suburban or urban areas
- Electricity, plumbing, and climate controls
- Custom ventilation or insulation solutions
- Upgrades like benches, shelves, or decorative elements
If you’re working with a tight budget, start simple and build up over time.
What Could Go Wrong?
Here’s what we’ve learned from trial and error:
Common mistakes to avoid:
- Using poor-quality materials that break down after one season
- Forgetting about airflow, your plants can overheat or develop mold
- Not planning enough space—plants grow faster than you think!
- Overcomplicating the design and losing motivation halfway through
Taking time to plan things out, even for a small build, saves you money and stress in the long run.
The Greenhouse Cost Conclusion
When it comes to adding a greenhouse, the possibilities are endless. You can decide to make one yourself or buy one ready to go. In any case, it’s an investment in your health, your passion, and your home.
Now you’ve got a much better idea of how much a greenhouse costs in materials, DIY builds, or fully assembled kits. The time to grow more of your food, flowers, or herbs is now if it ever makes sense. If you need a custom builder to help you build your greenhouse, let us know where you’re at, and we’ll see if we can connect you with a good contractor.
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