Build a Greenhouse
Plan, outfit, and operate a functional backyard or small commercial greenhouse — from structure through heating, ventilation, irrigation, shelving, monitoring, and lighting.
Department
Garden
Skill Level
Moderate
Planning Stages
8
Equipment Categories
8
Typical Use
Home / Small Farm
Last Updated
Jul 2026
Choose your greenhouse structure
The structural choice drives nearly every equipment decision that follows. Polycarbonate panels insulate better than single-layer film; consider site, budget, and whether the structure is permanent or relocatable.
Check local permit requirements — many jurisdictions require a permit for structures over 200 sq ft.
Recommended equipment
Prepare the site and foundation
A level, well-drained site is essential. Gravel provides drainage; a weed barrier keeps the floor clean and stable.
Orient the ridge east–west to maximize solar exposure through the day.
Recommended equipment
Install heating equipment
Heating capacity is measured in BTU/hr. Unit heaters suit larger spaces; heat mats provide bottom heat under seedling benches.
Vent any gas-fired heater to the exterior — never run unvented combustion inside a greenhouse.
Recommended equipment
Plan ventilation and air circulation
Target roughly one air exchange per minute in peak summer. Shutter exhaust fans paired with circulation fans keep temperature and humidity in range.
For a 10×16×8 ft house (~1,280 cu ft), a ~1,300 CFM exhaust fan gives about one air change per minute.
Recommended equipment
Set up irrigation and watering
Drip irrigation reduces foliar wetness and labor. A timer-controlled system with a backflow preventer suits most small greenhouses.
Use pressure-compensating emitters if your supply pressure varies.
Recommended equipment
Add shelving and growing benches
Wire or slatted benches drain freely and allow air movement. Galvanized or aluminum resists humid conditions far better than wood.
Leave at least 30 in of aisle width for comfortable working access.
Recommended equipment
Install monitoring and control
Start with temperature/humidity monitoring, then automate heating, cooling, and CO₂ from a single controller as you learn your operating patterns.
Wi-Fi sensors let you catch unexpected cold nights or overheating remotely.
Recommended equipment
2.4GHz W · 15Amp · 4 Pack
Primary install
Plan supplemental lighting and power
This step is more than lights: full-spectrum LED fixtures plus the power distribution to run them — outdoor-rated cords, weatherproof strips, timers, and switched or smart outlets for control.
Use outdoor/GFCI-rated power for any wet-location run inside the greenhouse.
Recommended equipment
Complete equipment list
Every recommended product for this project, organized by stage.
Choose your greenhouse structure
Prepare the site and foundation
Install heating equipment
Plan ventilation and air circulation
Set up irrigation and watering
Add shelving and growing benches
Install monitoring and control
2.4GHz W · 15Amp · 4 Pack
Primary install
Plan supplemental lighting and power
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