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Product Range
Our Janssens Review
Right for a hands-on buyer who wants a real glass, Victorian-style greenhouse with a genuine architectural look for a fraction of Hartley or Alitex money, and who is comfortable managing a freight delivery and a substantial self-build. Skip it if you want white-glove installation, a single accountable manufacturer, or an insulated structure, and treat the exact warranty and the specific seller's reputation as things to verify in writing before you pay.
Exaco, the exclusive US distributor, publishes full retail pricing. Junior Victorian runs $8,799 (VI23, 79 sq ft) to $10,249 (VI25, 116 sq ft). The Royal Victorian line runs $9,799 (VI23, 79 sq ft) to $18,999 (VI46, 250 sq ft) in 4mm tempered glass, or roughly $14,999 to $19,999 in hybrid glass-poly trim. The T-shaped Royal Orangerie is $21,999, the Antique Orangerie $28,499, Retro Victorian $28,999 to $34,499, and the flagship Cathedral $45,999. Verified against Exaco's live Royal Victorian and Junior Victorian product pages on 2026-07-15; glass VI36 and VI46 rose above the January price list. Kit prices before foundation and assembly.
exaco.com · Verified August 2026
Before you buy Janssens
These are the fastest buyer pages to read next if this brand is on your shortlist.
Start with the best greenhouses roundup
The fastest way to narrow the right lane, budget, and glazing before you go deep on a brand.
Check the real all-in costs
Budget for the structure, base, anchoring, ventilation, and the power runs buyers miss.
Glass or polycarbonate for your climate
Match the glazing to your climate, hail risk, and how you will use the greenhouse before you commit to a brand.
The honest Janssens review
Real assembly times, the warranty fine print, conditional wind ratings, and what the project costs all-in.
Hartley Botanic vs Alitex
The premium glass lane head to head, from Janssens to the heirloom glasshouses.
What size greenhouse do you need
Size it to what you grow and your climate before you commit to a model, and buy one step up.
The greenhouse buying guide
The full decision path: budget, glazing, size, base, shortlist, and what to ask before you sign.
From Janssens
Official product imagery and links from the brand.
Images courtesy of Janssens.
Strengths & Considerations
Strengths
- +Real 4mm tempered (safety) glass, thicker than the 3mm many kit greenhouses use
- +Sturdy aluminium profiles with stainless steel hardware and an included 6 inch aluminium foundation frame
- +Strong structural ratings, with the VI34 rated to around 120 mph wind and 25 PSF snow load
- +Genuine Victorian glass-house look at roughly a third to a half the price of Hartley or Alitex
- +Widely stocked in the US through Exaco and multiple retailers, often with free freight shipping to the lower 48 states
Watch Out For
- −Ships as a large DIY kit. Assembling the glass panes and rubber seals is a multi-day job that usually needs two or more people
- −Delivered by freight on an 18-wheeler, and glass panels can arrive damaged, so delivery access and on-arrival inspection matter
- −Single-pane 4mm tempered glass means more condensation and heat loss than an insulated structure, and because it sells through many independent resellers the support experience varies by seller
Before You Buy: Confirm These
These are Janssens's own documented terms and open questions, not our own test results. Confirm the specifics in writing before you order.
- ?Confirm the 18-wheeler can reach your property and arrange help for offloading a heavy palletized shipment
- ?The 6 inch aluminium base frame is included, but you still need a level, prepared foundation such as gravel, pavers, or a concrete pad under it
- ?Inspect every glass panel on delivery and document any breakage immediately for the freight and warranty claim, and anchor properly for local wind and snow loads
Alternatives to Compare
Gabriel Ash
premiumWorth considering only if you can buy an existing or in-stock unit and you want a genuine heirloom-grade cedar glasshouse with RHS pedigree, and the price is not the deciding factor. Everyone else should skip it, both on cost and because the brand has stopped producing new greenhouses; if you do buy, insist on written confirmation that your specific order and warranty will be fulfilled before paying.
Hartley Botanic
luxuryRight for a buyer who wants a genuine heirloom glasshouse with an 85 year British pedigree and RHS endorsement, and who is comfortable spending premium money and waiting months for a hand-built, professionally installed structure. Skip it if you want a fast, fixed-price kit you assemble yourself, or if you are not prepared to add masonry base work and a multi-month timeline to the budget.
Comparing a few brands?
Tell us your space and budget. We'll tell you whether Janssens or one of these fits you better, and check your quote so you don't overpay.
Why Consider Janssens?
Belgian glass and a Victorian look at a more reachable premium price than the heirloom tier. The step into real glass without the top-shelf number. The kits are heavy and a self-build is a real job. Verify current models, glazing, and warranty at write time.
Key Models
the entry point to the line, $8,799 (VI23) to $10,249 (VI25)
$9,799 with 4mm tempered glass
$11,499, the most popular size; hybrid glass-poly version $14,999
$14,499; VI46 (12'7" x 19'11", 250 sq ft) - $18,999
$21,999; Antique Orangerie $28,499; Retro Victorian from $28,999; Cathedral flagship $45,999
Support & Warranty
Exaco, the exclusive US distributor, publishes the warranty for Janssens glass greenhouses: up to 15 years on the aluminum frame and stainless steel hardware, and up to 10 years on defects in materials and workmanship when assembled to the manufacturer's instructions. Tempered glass glazing is excluded (replacement panes available at reasonable cost), as are operating parts like window-opener pistons and damage from extreme weather or unshoveled snow load. The warranty is non-transferable, runs from date of purchase, and requires dated proof of purchase. Claims go through Exaco customer service in Austin, Texas, so keep your invoice even when buying through a third-party retailer.
FAQ
Is Janssens worth it in 2026?
Right for a hands-on buyer who wants a real glass, Victorian-style greenhouse with a genuine architectural look for a fraction of Hartley or Alitex money, and who is comfortable managing a freight delivery and a substantial self-build. Skip it if you want white-glove installation, a single accountable manufacturer, or an insulated structure, and treat the exact warranty and the specific seller's reputation as things to verify in writing before you pay.
How much do Janssens greenhouses cost?
Janssens greenhouses run from about $8,799 up to about $45,999 based on current pricing on exaco.com as of August 2026. Exaco, the exclusive US distributor, publishes full retail pricing. Junior Victorian runs $8,799 (VI23, 79 sq ft) to $10,249 (VI25, 116 sq ft). The Royal Victorian line runs $9,799 (VI23, 79 sq ft) to $18,999 (VI46, 250 sq ft) in 4mm tempered glass, or roughly $14,999 to $19,999 in hybrid glass-poly trim. The T-shaped Royal Orangerie is $21,999, the Antique Orangerie $28,499, Retro Victorian $28,999 to $34,499, and the flagship Cathedral $45,999. Verified against Exaco's live Royal Victorian and Junior Victorian product pages on 2026-07-15; glass VI36 and VI46 rose above the January price list. Kit prices before foundation and assembly.
Who is Janssens best for?
Buyers who want real tempered glass and a Victorian look without a five-figure top-tier price.
What should buyers watch out for with Janssens?
Confirm the 18-wheeler can reach your property and arrange help for offloading a heavy palletized shipment
What brands should you compare against Janssens?
Most buyers should compare Janssens with Gabriel Ash and Hartley Botanic before deciding. That gives you a better read on price, support, and where the brand actually fits.
How strong is Janssens on warranty and support?
Exaco, the exclusive US distributor, publishes the warranty for Janssens glass greenhouses: up to 15 years on the aluminum frame and stainless steel hardware, and up to 10 years on defects in materials and workmanship when assembled to the manufacturer's instructions. Tempered glass glazing is excluded (replacement panes available at reasonable cost), as are operating parts like window-opener pistons and damage from extreme weather or unshoveled snow load. The warranty is non-transferable, runs from date of purchase, and requires dated proof of purchase. Claims go through Exaco customer service in Austin, Texas, so keep your invoice even when buying through a third-party retailer.
Sources (5) · Verified Jul 12, 2026
Methodology
Brand verdicts are based on buyer fit, build quality, support path, price pressure, and the risks that tend to show up after delivery. A strong reply from a manufacturer can improve factual clarity, but it does not improve placement.
If support coverage, warranty language, or dealer access are thin, we would rather say that plainly than hide it behind marketing copy.
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