How to Build a Greenhouse (free plans!) - Boots & Hooves Homestead (2024)

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How to Build a Greenhouse for a small farm or homestead. Plus, free plans that can be printed.

I have desired my own greenhouse to extend our growing season for quite awhile. My husband did a lot of research and came up with a plan on just how to build a greenhouse that would work on our small homestead.

And those of you who may not know, a greenhouse will extend the growing season because it stays warm inside even during the winter. Now, if you have extreme winters like we do, adding in an outdoor safe heater and grow lights may be beneficial.

This last spring my husband finally listened to all of my hints and started to build my dream greenhouse.

Gosh, I love him.

Ya know, I would have been satisfied with a simple hoop house, but my very loving husband had other ideas.

When he started to research and come up with a plan, he decided to “do it right” as he says. And what this means, I’m not entirely sure. But I do know that he built this thing pretty solid.

And boy, am I glad he did. It is super cute! And it’s built tough which should withstand some of those crazy Nebraska winds.

How to Build a Greenhouse (free plans!) - Boots & Hooves Homestead (1)

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How to Build a Greenhouse

Not only does this greenhouse make my dreams come true. There is a lot of practicality involved here. Extended growing season, for one!

I’m currently planning out our fall garden with the some of the cold sensitive plants inside. This season, we will have homegrown lettuces and fresh herbs ready just as the weather starts to cool down.

I will no longer need to start all of my seeds in random places throughout the house, seeking out the best lighting and flat surfaces where they are free of toddler curiosity.

We have been on a mission to grow as much of our food as possible and this small greenhouse is perfect for growing plants to help contribute towards this goal.

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Free Greenhouse Plan

This greenhouse project wasn’t exactly cheap. We splurged on it because we wanted something that would last for many years to come.

We opted to use Polycarbonate Sheets for our greenhouse. Good call, husband. I love the look!

Our greenhouse isn’t too large, but is the perfect fit for our family’s home garden. And a welcome addition to our other garden plots.

The dimensions are 10′ by 8′ and stands about 8 1/2′ tall.

All in the greenhouse cost was slightly above $750. The most expensive pieces were the plastic sheeting that we chose. But we needed something durable that would withstand the strong winds.

You could save money on using some other greenhouse plastic, but in my opinion you might as well go with the stronger polycarbonate sheets. Because you’ll have to replace it less often and overall it’ll save you some moolah.

Here’s the supplies we used:

Approximate dimensions:

These were 4×4 timber

  • 2 base ends, dimensions 3 1/2 x 3 1/2 x 96″
  • 2 base sides, dimensions 3 1/2 x 3 1/2 x 113″

And these were 2×4

  • 2 sole plates ends, dimensions 1 1/2 x 3 1/2 x 89″
  • 2 sole plates sides, dimensions 1 1/2 x 3 1/2 x 120″
  • 12 wall stud sides, dimensions 1 1/2 x 3 1/2 x 57″
  • 1 ridge support, dimensions 1 1/2 x 3 1/2, 91″
  • 2 back studs, dimensions 1 1/2 x 3 1/2, 76″
  • 2 door frame sides, dimensions 1 1/2 x 3 1/2 x 81″
  • 1 cripple stud, dimensions 1 1/2 x 3 1/2 x 16″
  • 1 door header, dimensions 1 1/2 x 3 1/2 x 32″
  • 2 knee wall caps, 1 1/2 x 3 1/2 x 120″
  • 1 ridge pole, 1 1/2 x 3 1/2 x 120″
  • 12 rafters, 1 1/2 x 3 1/2 x 60″
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He also made two vents, they were cut to fit inside of the rafters. One on each side and are held up using a metal sheet and pin. I’m sure there’s a technical name for these things, but I’m not exactly sure what.

Approximate dimensions – always take actual length and angle measurements on structure before cutting. There’s a saying and maybe you’ve heard it before. “Measure twice and cut once”.

DIY Greenhouse – Steps

My loving husband decided to build the greenhouse in the shop and move it over to its new location once he finished.

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After he measured and cut the pieces, his first step was to build the base and then frame for the wall. Once he built the wall frames, he attached them to the base using those 3″ deck screws.

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He found an old screen door that my mother in law was no longer using and trimmed the door frame to make it fit. Then he added the rafters.

And because he’s extra sweet, he painted it all white for me. What a guy I have!

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Next, he started adding the plastic sheeting, secured with screws. This sheeting came in 8′ pieces so he cut them to size.

He also cut scrap lumber to size and added them between the wall frames for additional stability. (see photo above)

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To give it a little more stability, he added scrap pieces of wood on the arches in the rafters.

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For the vent, he just measured the space between the rafters and made two of these pieces to fit.

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From the inside, the vents are being supported by this metal sheet and pin so I can easily open and close it to my height preference.

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He secured the greenhouse in the ground with these metal rods that are welded into t’s, one on each side.

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Lastly, he added an 10′ rain cap to the top of the roof to keep the rain out.

You all don’t even know how long I have waited for this greenhouse to arrive in its location so I can use it! If you’re married to a rancher, you’ll understand!

Related: 25 Lessons Learned as a Rancher’s Wife

Between the cows and our extreme weather, this has been many months of me trying to practice patience. And really that looked a little more like nagging on my part.

But it’s here and I love it.

For the interior of the greenhouse, I am adding some shelving and we are building raised garden beds near the outside.

What Can Be Grown in a Greenhouse?

Oh, boy! The possibilities are really endless. But I will share a few of the things we’ve done that has worked well and some of my favorites.

A greenhouse will get really hot during the summer and especially in warmer climates, so making sure that you have vents and a fan if necessary to ensure the greenhouse is getting adequate ventilation.

Some foods can grow well during those hot months or some should be reserved for the cooler growing months. It’s always best to get familiar with your growing seasons. We are a 5a.

You can also grow year round including the winters. Those with harder winters, can supplement with a proper outdoor safe heating element, such as a heater, grow lights, and heat mats.

Herbs and leafy greens are an excellent choice to grow in the greenhouse especially during the cooler weather.

And tomatoes & peppers are my favorite greenhouse veggies to grow in the greenhouse during the summer months.

Related: What to Grow in a Greenhouse

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Best foods to grow in a greenhouse during the cooler months:

Here’s a few links to help get you started…

  • Herbs
  • Onions
  • Garlic
  • Broccoli
  • Cabbage
  • Cauliflower
  • Microgreens
  • Spinach
  • Swiss chard

Best foods to grow in a greenhouse during the warmer months:

  • Tomatoes
  • Peppers
  • Zucchini/Summer Squash
  • Beans
  • Cucumbers
  • Melons
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How to Build a Greenhouse

I have desired my own greenhouse to extend our growing season for quite awhile. My husband did a lot of research and came up with a plan on just how to build a greenhouse that would work on our small homestead.

This tutorial comes with printable free greenhouse plans!

Cook Time 5 hours hours

Additional Time 2 hours hours

Total Time 7 hours hours

Equipment

  • A really good drill!

  • And misc other tools as needed

Ingredients

  • 12 8′ long, 6 mm greenhouse polycarbonate sheets
  • 4 16′ 2×4
  • 4 16′ 4×4
  • 3 ″ deck screws
  • 10 ′ rain cap
  • APPROXIMATE DIMENSIONS
  • THESE WERE THE 4×4 TIMBER:
  • 2 base ends dimensions 3 1/2 x 3 1/2 x 96″
  • 2 base sides dimensions 3 1/2 x 3 1/2 x 113″
  • AND THESE WERE THE 2×4 TIMBER:
  • 2 sole plates ends dimensions 1 1/2 x 3 1/2 x 89″
  • 2 sole plates sides dimensions 1 1/2 x 3 1/2 x 120″
  • 12 wall stud sides dimensions 1 1/2 x 3 1/2 x 57″
  • 1 ridge support dimensions 1 1/2 x 3 1/2, 91″
  • 2 back studs dimensions 1 1/2 x 3 1/2, 76″
  • 2 door frame sides dimensions 1 1/2 x 3 1/2 x 81″
  • 1 cripple stud dimensions 1 1/2 x 3 1/2 x 16″
  • 1 door header dimensions 1 1/2 x 3 1/2 x 32″
  • 2 knee wall caps 1 1/2 x 3 1/2 x 120″
  • 1 ridge pole 1 1/2 x 3 1/2 x 120″
  • 12 rafters 1 1/2 x 3 1/2 x 60″

Instructions

  • Measure and cut your lumber. Approximate dimensions – always take actual length and angle measurements on structure before cutting. There’s a saying and maybe you’ve heard it before. “Measure twice and cut once”.

  • The first step was to build the base and then frame for the wall.

  • Once the wall frames were built, we attached them to the base using those 3″ deck screws.

  • Measure out your door frame. I wanted a screen door on mine, so my husband cut and measured the frame to fit this.

  • Next, install your rafters.

  • At this point, if you want yours painted, this is a good place to do that.

  • Now you can begin to add your plastic sheeting, secured with screws. This sheeting came in 8′ pieces so we cut them to size.

  • We also cut scrap lumber to size and added them between the wall frames for additional stability. (see photo above)

  • My husband also added scrap pieces of wood on the arches in the rafters.

  • For the vent, he just measured the space between the rafters and made two of these pieces to fit.

  • Lastly, he added an 10′ rain cap to the top of the roof to keep the rain out.

  • You can also use metal stakes to secure it in the ground.

Notes

Again, I want to stress this. These measurements are approximates. We had to cut some pieces to size as we were building it.

“Measure twice and cut once”.

How to Build a Greenhouse (free plans!) - Boots & Hooves Homestead (2024)

FAQs

How to build your own greenhouse cheaply? ›

Selecting the right materials is key to building a low-cost greenhouse. Consider using PVC pipes or rebar for the frame; these materials are durable and budget-friendly. For the covering, opt for UV-resistant plastic sheeting, which is affordable and effective.

How do you build a greenhouse in a windy area? ›

Provide some shelter from high winds by placing it near something that will act as a windbreak, such as a garden wall, fence or hedge. If no protection can be offered, consider erecting a windbreak of some kind. Orient the greenhouse so the gable end faces the prevailing wind.

How do you build a level base for a greenhouse? ›

If the site of the greenhouse is on well compacted, firm soil, the cheapest and easiest option is to concrete in the four posts at the corners of the frame, ensuring that it is completely level before the concrete sets. It might be necessary to support the frame in place whilst the concrete goes hard.

Is it cheaper to build a greenhouse or buy a kit? ›

In most cases, buying a greenhouse kit is cheaper than building one from scratch.

Do greenhouses work in winter? ›

The answer is yes! There are plenty of plants you can grow in a greenhouse in winter, and while they won't grow as fast as they would in the warmer months, they'll still flourish with a little protection from the elements.

What is the best material for a greenhouse in the wind? ›

Not all greenhouses are made the same, and it's important to choose one that is made of materials that will be able to hold up to high winds when you live in a windy area. Polycarbonate and high density polyethylene are two good options to consider.

How do you ventilate a greenhouse without losing heat? ›

Maintain Warmth Through Vent Adjustment Techniques

Close some side vents at night to contain interior warmth, and keep roof vents open to allow slight venting of rising warm air. This approach helps keep the air moving just enough to ward off mold without losing too much heat, especially around your plants.

What is the best surface for a greenhouse? ›

A greenhouse installed onto a concrete slab is more durable and long-lasting than one installed directly onto a grass area. A concrete slab provides better insulation than grass, helping to regulate the temperature inside the greenhouse.

Can you lay paving slabs on a dry mix? ›

The simple answer is yes! As long as it is sufficiently compacted, it will be fine. When using a dry mix concrete as a patio sub base, it should always be at least 150mm deep.

How do you erect a greenhouse? ›

You could lay a concrete strip footing that's 200mm wide and 100mm deep. Then you can anchor your base by drilling and bolting it into the concrete. Drill holes through the base, or directly through the bottom sill of the greenhouse frame in the centre of each bay (taking care to leave room for the glazing).

How to move a greenhouse by hand? ›

Start at the top. Remove the glass and put the clips in a bucket or other safe place. Continue in the same manner, removing the glass from the sides of the greenhouse. Remove all the glass before attempting to move the structure; if you don't, it may bend.

What is the best wood for a greenhouse? ›

Cedar: Cedar wood is widely regarded as one of the best choices for greenhouse frames. It possesses natural oils and resins that make it resistant to rot, decay, and insect infestation.

How much does it cost to build a greenhouse from scratch? ›

A professionally built greenhouse costs around $11,000, with most homeowners paying between $2,000 and $25,000. For a smaller growing space at a considerably cheaper price, homeowners can install a smaller, prefabricated greenhouse, buy a greenhouse kit, or DIY it.

How big of a greenhouse do I need to be self sufficient? ›

A greenhouse can be made self sufficient at almost any size, as long as there is enough room for the equipment necessary. For a standard family, between 100 and 400 square feet of space should be plenty of room to grow enough plants to feed everyone through the year.

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