Janssens Gigant

From £11,170.00

The Janssens Gigant is a grand, commercial‑styled greenhouse with high ridge heights and vast internal space. Ideal for large‑scale growing, elegant garden rooms, event settings or retail spaces, and perfectly suited to create stylish covered areas for garden centres, showrooms and other commercial retail uses.

AO - Automatic Opener for Roof Vents

Automatically opens and closes your greenhouse roof vent based on temperature - no electricity or batteries required.

SDL – Low Threshold for Sliding Door

Removes the base plinth and replaces it with a 30mm threshold to provide a minimal step entrance.

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The Janssens Gigant combines commercial‑grade engineering with inspiring scale and versatility. Towering ridge heights create generous internal volumes that suit large cultivation, impressive showrooms, stylish garden rooms, swimming pool covers or custom commercial installations.

Lengths from 3.8m to 17.8m
Widths from 3.8m to 6.0m
Choice of eave/gutter heights 2.04m, 2.33m, 2.53m and 2.93m
Ridge heights from 2.86m up to 4.20m depending on configuration.

Built from slim, ultra‑rigid aluminium tubular profiles and glazed with 4mm toughened safety glass sealed with durable rubbers, the Gigant delivers strength, low maintenance and enduring performance. Practical features include a self‑supporting bottom profile, internal condensation gutter, external roof gutters and downpipes, and stainless‑steel fixings. Choose powder coating, mill finish or any RAL colour to match your vision.

Key features

  • High‑ridge profile for exceptional internal volume and headroom
  • Extremely strong structural portal frames as standard for superior stability
  • Slim, ultra‑strong aluminium tubular profiles
  • 4mm toughened safety glass with durable sealing rubbers for excellent weather protection
  • Self‑supporting bottom profile, internal condensation gutter, external gutters and downpipes
  • Stainless‑steel fixings and powder‑coated or mill finish (any RAL colour available)

The above designs and prices are a small example of what's possible. Along with flexible door and window positions, automatic openers, hinged doors, side louvres, shelving and staging, many other options are available. The 3D Configurator in the link below is a great way to design your perfect Janssens; if you’d prefer to discuss options and have us do the designing for you, just get in touch.

Design, Save and send us your unique design code and we’ll provide a quotation.

Janssens alusystems 3D configurator

Delivery

Janssens Greenhouse Delivery Times:

Janssens Action Models: 4-6 weeks subject to stock.
Popular, practical, value-focused models with set specifications. This allows for quicker delivery and lower prices.

Janssens Custom Models: 6-12 weeks
Bespoke, made‑to‑order greenhouses with endless options for size, colours, glazing, doors, vents and accessories so you can tailor every detail to your needs.

Delivery information:

  • Prices shown on the example models include UK mainland delivery, excluding the following postcodes (AB, DD, IV, KW, PA, PH).
  • Delivery is subject to suitable access; access requirements will be discussed when arranging delivery.
  • If you have access restrictions to your property please contact us directly to discuss and clarify details.
  • If your address is difficult to find, or the postcode does not locate your property, please inform us at the time of ordering.

Installation

Installation is currently only available for NR*, IP* and PE* postcodes. If you’d like your Greenhouse installed by our expert team, please get in touch.

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