Learning how to build a greenhouse cheap starts with choosing an affordable design and using materials that are easy to find. PVC pipes, reclaimed windows, scrap wood, and plastic sheeting can help reduce costs without making the greenhouse difficult to build.
Cheapest Greenhouse Types to Build
The cheapest greenhouse design depends on its size, climate, and the materials you already have. These options are suitable for different budgets and growing needs.
PVC Pipe Hoop House
A PVC hoop house is one of the simplest low-cost greenhouse designs. Flexible PVC pipes create the curved frame, which can then be covered with greenhouse plastic or another suitable transparent material.
Wood-Framed Greenhouse
If you can find inexpensive or reclaimed lumber, a wood-framed greenhouse can be affordable and sturdy. The frame can be built in a simple rectangular design and covered with plastic film, polycarbonate, or reclaimed windows.
Cold Frame (Mini Greenhouse)
A cold frame is a small, low-profile greenhouse that can protect seedlings and plants from cold weather. It requires fewer materials than a full-size greenhouse, making it a good option for beginners with limited space.
Repurposed Window Greenhouse
Old windows can be reused to create greenhouse walls and roofing. Check salvage yards, local listings, or renovation projects for unwanted windows that can be obtained cheaply or for free.
Other Low-Cost Alternatives
Simple A-frame greenhouses require relatively little framing material, while geodesic dome designs can provide a strong structure with efficient material use. Choose the design that matches the materials and tools you already have.
Budget-Friendly Materials Guide
The right materials can make a major difference to your greenhouse budget. Compare durability, availability, and installation requirements before buying new supplies.
Frame Materials Compared
| Frame Material | Cost | Durability | Best For |
| PVC Pipe | Low | Moderate | Small hoop houses |
| Wood | Low to Moderate | Good | Permanent DIY structures |
| Metal Conduit/EMT | Moderate | High | Stronger lightweight frames |
- PVC is usually the easiest option for a basic DIY greenhouse, while wood and EMT can provide greater rigidity for larger structures.
Covering Materials Compared
| Covering Material | Cost | Durability | Best For |
| Poly Film | Low | Moderate | Budget greenhouses |
| Marine Vinyl | Low to Moderate | Moderate | Small structures |
| Polycarbonate | Higher | High | Longer-lasting greenhouses |
| Recycled Glass/Windows | Low if salvaged | High | Permanent DIY builds |
- For the lowest initial cost, poly film is often a practical choice. Reclaimed windows can also reduce expenses if suitable pieces are available locally.
Where to Find Free or Cheap Materials
Look for usable materials at salvage yards, Facebook Marketplace, Craigslist, local renovation sites, and scrap-wood suppliers. Reusing windows, lumber, containers, and other suitable materials can significantly reduce the total project cost.
Step-by-Step: How to Build a Cheap Greenhouse
If your goal is how to build a greenhouse cheap, keep the design simple and avoid buying materials you can safely reuse.
1. Choose the Location
Select a level area that receives plenty of sunlight and has good drainage. Avoid locations where buildings or trees will shade the greenhouse for most of the day.
2. Select a Simple Design
A small PVC hoop house or basic wood frame is usually easier to build than a complicated greenhouse design. Choose dimensions that match your available space and budget.
3. Prepare the Base
Clear and level the ground before installing the frame. Depending on the design, you can use treated lumber, ground stakes, or another suitable base system.
4. Build the Frame
Install the PVC hoops, wooden frame, or metal conduit according to your design. Secure each connection properly so the structure remains stable in wind and changing weather.
5. Install the Covering
Stretch greenhouse plastic, vinyl, polycarbonate, or reclaimed windows over the frame. Keep the covering secure and avoid excessive gaps that can allow wind to enter.
6. Add Ventilation
Install vents, roll-up sides, or another method of allowing hot air to escape. Proper ventilation helps prevent excessive heat and humidity inside the greenhouse.
7. Add Shelving and Growing Areas
Use inexpensive shelving, reclaimed wood, or raised beds to organize plants. Keep enough space between plants and walls for airflow and maintenance.
Money-Saving Tips TO Build Cheap Greenhouse
- Use reclaimed materials: Old windows, lumber, and shelving can reduce material costs.
- Build smaller: A compact greenhouse requires less framing and covering material.
- Choose a simple design: Avoid unnecessary features that increase labor and material costs.
- Buy materials in bulk: Larger quantities of plastic, fasteners, or lumber may reduce the cost per unit.
- Reuse what you already have: Check your garage, shed, or storage area before purchasing supplies.
- Plan before cutting: A detailed material list helps prevent expensive mistakes and wasted materials.
Estimated Cost Breakdown to Build a Cheap Greenhouse
The total cost varies considerably depending on greenhouse size, materials, and how much you can salvage.
| Greenhouse Type | Approximate DIY Material Cost* | Typical Use |
| Cold Frame | $30–$100 | Seedlings and small plants |
| Small PVC Hoop House | $75–$250 | Small gardens |
| Wood-Framed Greenhouse | $150–$500+ | Permanent backyard growing |
| Repurposed Window Greenhouse | $100–$400+ | Custom permanent structure |
*These are broad planning ranges, not fixed market prices. Local material costs and the amount of reclaimed material you use can change the final budget significantly.
When to Call a Professional Handyman
Some greenhouse projects can be completed entirely as DIY builds, but professional help can be useful when the project involves structural, electrical, or major repair work.
Foundation, Framing, and Structural Work
Consider professional help if the greenhouse requires a permanent foundation, complex framing, heavy materials, or structural modifications. Proper installation is particularly important for larger structures exposed to strong wind or snow.
Electrical and Ventilation Installation
Greenhouses may require electrical connections for lighting, heaters, fans, or automated vents. Electrical work should be handled by a qualified professional when it involves permanent wiring or connections to your home’s electrical system.
Repairing or Upgrading an Existing Greenhouse
A handyman can help repair damaged framing, replace coverings, reinforce weak sections, or upgrade doors and ventilation. Professional assistance can save time when repairs involve multiple components.
Conclusion
The easiest way to build a greenhouse cheap is to choose a simple design and combine affordable new materials with suitable reclaimed ones. PVC hoop houses, cold frames, and repurposed-window greenhouses can all work for different budgets and growing needs. Before starting, compare your material costs, greenhouse size, climate, and construction skills. For structural, electrical, or complicated repair work, Fixtman professional handyman assistance can help ensure the greenhouse is built safely and properly.
Frequently Asked Questions
What Is the Cheapest Material to Build a Greenhouse With?
PVC pipe and poly film are among the more affordable materials for a basic DIY greenhouse. Reclaimed wood and old windows can reduce costs even further if they are available locally.
Can I Build a Greenhouse for Under $200?
Yes, a small greenhouse can potentially be built for under $200 if you use a simple design and inexpensive or reclaimed materials. A cold frame or small PVC hoop house is more realistic at this budget than a large permanent greenhouse.
Do I Need a Permit to Build a Greenhouse?
Permit requirements vary by location, greenhouse size, foundation type, and local building regulations. Check with your local building authority before starting a permanent or large structure.
How Long Does a DIY Greenhouse Last?
A DIY greenhouse’s lifespan depends on its frame, covering, climate, maintenance, and construction quality. Plastic coverings may need replacement sooner than rigid materials such as polycarbonate or glass.
What Size Greenhouse Is Best for Beginners?
A small greenhouse is usually easier for beginners to build, maintain, and heat or ventilate. A compact structure also lets you learn greenhouse management without committing to the cost of a large installation.
