A prebuilt octagon greenhouse with clear polycarbonate walls and roof on a cedar base, a Trex floor and a cupola, in four sizes from 8 to 14 feet across — custom built to order by experienced Amish builder teams, with full assembly and estimated delivery included.
Octagon Cedar Greenhouse — A Greenhouse That's a Garden Centerpiece
Eight sides, a cupola on top and warm cedar all around: this is the greenhouse people stop to ask about. Polycarbonate walls and roof let light in from every angle, cedar siding wraps the base, and black doors and windows give it a crisp finished look. Inside, potting shelves line every side except the door, over a low-maintenance Trex deck floor. Choose 8, 10, 12 or 14 feet across.
Which octagon is right for me? This is our clear-wall cedar octagon: polycarbonate walls and roof for maximum light, cedar base, Trex floor, black doors and windows, 8' to 14' across, always delivered prebuilt. Prefer a painted wood octagon with windows all around and Dutch doors? See our 8' x 8' Painted Wood Octagon Greenhouse, available as a kit or prebuilt.
Full Assembly Included · Estimated Delivery Included · Not a Kit · Cedar & Trex · Custom Finishes · Financing Available
Full assembly is included — this is not a kit. Our Amish builder teams build your greenhouse completely in their shop, deliver it, and set it on your prepared site ready to use. No crates of parts, no installer to hire, no weekends lost to assembly. Estimated delivery is included in the price. Additional freight often applies depending on your location, and we'll confirm any freight charges with you before we process your order. You can also request a freight quote anytime with the freight quote form further down this page, or call or text 732-806-7959.
Personal Design Help, Included
Text us a photo of your home and your yard at 732-806-7959. We'll help you match colors and siding to your house, choose the right size and layout, and place doors, windows and benches where they work best — before anything is built.
Make It Yours
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Watering & lighting systems: watering, misting and grow lighting for year-round growing.
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Electric & plumbing: lighting, electric and plumbing can all be included.
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Finishes: stain and trim options to match your home and garden.
Prebuilt vs. a Typical Greenhouse Kit
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Our prebuilt Cedar Octagon |
Typical kit |
| Assembly |
Done for you by professional builders, in their shop |
You, or an installer you hire |
| Ready to use |
The day it's delivered |
After days or weekends of building |
| Frame |
Pressure-treated studs, rafters and floor joists |
Often light aluminum or untreated wood |
| Base & trim |
Real cedar siding around the base and cedar trim |
Often aluminum or untreated pine |
| Floor |
Trex composite decking — won't rot or splinter |
Usually no floor; set on the ground |
| Walls & roof |
Clear polycarbonate walls and roof, topped with a cupola |
Often thin single-wall panels |
| Inside |
Potting shelves on every side except the door; black doors and windows |
Often sold separately |
| Customization |
Size, finishes, electric, plumbing, watering & lighting |
Limited to the kit's options |
| Delivery |
Estimated delivery included, additional freight often applies; set in place on your prepared site |
Freight to the curb; you unload the pallets |
| Warranty |
10-year warranty |
Varies; often shorter |
| Support |
Greenhouse specialists plan your size, site, foundation and delivery with you |
Instructions in the box |
Quality, Customization and Honest Pricing
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Professional quality: built to order by experienced Amish builder teams with decades of craftsmanship behind them — pressure-treated floor joists, studs and rafters, cedar siding and trim, Trex decking and a polycarbonate roof.
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Truly customizable: size, finishes, electric, plumbing, watering and lighting, all chosen around your garden. We've spent more than 10 years as greenhouse specialists helping customers plan and install greenhouses.
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Clear pricing: all four sizes are priced right here — no price-sheet forms to fill out. Full assembly and estimated delivery are included, and if you've found a lower price on a comparable structure, see our Price Match Policy.
Talk to Us
We're greenhouse specialists, not a general retailer. We'll help you choose the size, finishes and options, plan your site and foundation, and coordinate delivery from start to finish.
Call or text us at 732-806-7959 — we're happy to work with you directly to get you the best options and price for your specific space.
FAQ
What sizes is the Octagon Cedar Greenhouse available in?
8', 10', 12' and 14' across, all priced on this page.
How is it different from a standard greenhouse?
The eight-sided shape, cedar siding, black doors and windows and cupola make it a decorative garden feature as well as a productive growing space, with light coming in from every direction.
How is this different from your painted wood octagon?
This one has clear polycarbonate walls on a cedar base, a Trex floor and comes in 8' to 14' sizes, always prebuilt. Our painted wood octagon is 8' x 8' with LP SmartSide walls full of windows and Dutch doors, sold as a kit or prebuilt.
Is assembly included?
Yes. Full assembly is included — it's built before it ships and set on your prepared foundation at delivery. There's nothing to put together and no separate installer to pay.
Is delivery included?
Estimated delivery is included in the price. Additional freight often applies depending on your location, and we'll confirm any freight charges with you before we process your order. You can also request a freight quote anytime with the freight quote form further down this page, or call or text 732-806-7959.
Can it match my house?
Yes. Paint, siding, roofing and trim can be chosen to match your home or existing structures, with many custom finishing options.
Can you add watering, grow lights or plumbing?
Yes. Watering and lighting systems are available on every prebuilt greenhouse, and lighting, electric and plumbing can all be included.
Does it have a floor?
Yes — low-maintenance Trex decking over pressure-treated floor joists.
What foundation does it need?
A level, well-drained base — crushed stone or a concrete pad. We can help coordinate site prep before delivery.
Do I need a permit?
Requirements vary by town, so check with your local building department before you order.
Who builds it?
Experienced Amish builder teams handcraft every Octagon Cedar Greenhouse to order in the USA. World of Greenhouses handles your order, design choices, site planning and delivery coordination. Call or text 732-806-7959.
