DIY Greenhouse Plans
Simple, effective greenhouse plans from someone who's built them. Use them as-is or modify to suit — they're yours.
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G'day — I'm Sam King
Builder · Teacher · Ben's Brother
A builder by trade and an ex-woodwork teacher by profession. I've put together these plans with a focus on being structurally sound but with the easiest join and assembly methods possible. The average Year 10 Technology student could build these — and so could you.
All plans can be modified to suit your size and shape, though we recommend a minimum 15-degree roof pitch. Plans are based on buying timber from your local yard and plastic from a supplier — but come to us for the gear that makes your greenhouse actually work — fans, vents and rollups that turn a plastic tent into a tropical jungle rather than the Sahara desert.
These plans are provided as a guide. They work for us and for many of our customers. Modify them freely. Always check local council requirements — resource consent or building consent may apply in your area.
Three Standard Sizes
All designed with ventilation as a priority from the start — not bolted on as an afterthought.
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Small
DIY One Tree Hut
A simple, affordable structure designed for one mango tree. Good starting point for first-time greenhouse growers. Easy to build with basic skills — and the plan can easily be changed in size to suit several trees.
Download Plan PDF
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Medium — 6 × 3.3m
6 × 3.3m Greenhouse
Our most popular size. Space for 2–4 mango trees plus other tropical plants. Full roll-up side ventilation, Beeswax automated windows, a vent and industrial exhaust fan. Or modify to suit.
Download Plan PDF
Components for this size:
400mm Exhaust FanAvailable
1000mm Manual VentAvailable
1000mm Controlled VentAvailable
Rollup HandleSold Out
Beeswax Window OpenersSold Out
To order: sam@kingag.co.nz
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Large — 21 × 8m
21 × 8m Greenhouse
Small commercial, lifestyle or enthusiast scale. Multiple varieties, full production capacity. Full dual roll-up sides, thermostatically controlled vent and exhaust fan system — you set the maximum temperatures for best growing success. Also an ideal low-cost large greenhouse for those thinking about commercial mango or papaya growing — serious climate control at a fraction of the cost of conventional commercial structures.
Download Plan PDF
Components for this size:
800mm Exhaust FansAvailable
1000mm Manual VentAvailable
1000mm Controlled VentAvailable
1380mm Manual VentAvailable
1380mm Controlled VentAvailable
Rollup HandleSold Out
To order: sam@kingag.co.nz