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How Much Does it Cost to Build a Greenhouse?

Build a Greenhouse Costs
Average reported costs
based on 5 cost profiles
Most homeowners
spent between
$8,666 - $21,734
Low cost
High cost

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Greenhouses make great additions to any home. They provide a structure for growing plants that will protect them from the climate of wherever you live, allowing for plant growth that may not be native to your area. However, it may seem like an overwhelming project to take on, and the cost to build a greenhouse might be hard to predict. The first thing you want to do is find a reputable professional who can help you figure out what will work best for your home and who can help you figure out the price.
Once you've found a professional, there are a few common factors that will impact the cost to build a greenhouse such as dimensions, materials, excavation, lighting and permits among others. All factors considered, the average costs & expenses to build a greenhouse is around $16,000, with $7,000 being the low end and $25,000 on the high end.

Greenhouse Size

The square footage of your new structure will determine a lot of the cost. A bigger space will mean more materials as well as more time for a professional to be working. This is especially true because there will be a need for three different kinds of professionals for this project: someone for the excavation and concrete, someone to erect the glass and steel and an HVAC or electrical specialist. Using multiple professionals will increase the cost to build a greenhouse, but will make sure that the job is done correctly and that the structure is sound.

Building Materials

One of the biggest factors in the cost to install a greenhouse will be the materials. Glass is common and attractive, but also expensive. Another option would be polyethylene, which would keep the cost to build a greenhouse slightly lower. For the framing you can use either wood or steel, depending on the look you want.

Excavation for Foundation

The area where you want to build will need to be excavated and leveled for a foundation to be poured. You'll want to work with a concrete professional for this portion, which will increase the cost to build a greenhouse, but will ensure it's installed correctly. A proper foundation is crucial for any construction project. A foundation wall is also a good idea to insulate against ground temperatures. This will increase the cost to build a greenhouse, but will help regulate the temperature in your structure.

HVAC Installation

An important component to your greenhouse will be temperature control. A ground heating and cooling system is a good option since heat rises and will still hit the plants if it starts from the ground. You'll want to work with a certified HVAC professional to install your system, which will increase the cost to build a greenhouse.

Adding Lighting

You'll probably want to add lighting into your greenhouse so you can use it during the nighttime, but also if you ever want to install heat lamps for your plants. Your lighting scheme will add to the cost to build a greenhouse, but will make it much more functional.

Building Permits

You'll likely need to obtain a building permit to erect a new structure on your property. Make sure to take care of this before construction begins.
Overall, the cost to build a greenhouse will depend on the size of the structure, the materials you choose and the professionals who do the work. Make sure to talk to at least three professionals for each aspect of your project to ensure you find someone you can trust and who can work well with other professionals.


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