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17x17 Janssens Gigant Hobby Greenhouse

17x17 Janssens Gigant Hobby Greenhouse
Delivery 4-16 weeks ⛟
Click to enlarge - For illustration purposes.

Quick Code: P172947

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Use code JANSS50 at checkout
  • 17ft 5" wide x 17ft 5" deep
  • 4mm Full Length Toughened Safety Glass
  • Extra Strong Aluminium Frame
  • Choice of Powder Coated Finishes
  • Double Hinged Door
  • 4 x Roof Vents
  • 1 x Louvre Vent
  • Includes Box Section Base Plinth
  • No Clip Rubber Glazing Gasket Strips
  • Gutters and 40mm Aluminium Downpipes
  • Stainless Steel Hardware
  • 13 Year Manufacturers Warranty
  • Contact us for Custom Options on this Model
Greenhouse Size Diagram

Greenhouse Dimensions

A: Greenhouse width

5310mm (17′ 5″)

B: Greenhouse depth

5310mm (17′ 5″)

C: Ridge height

3150mm (10′ 4″)

D: Eaves height

2040mm (6′ 8″)

E & F: Door Size

700mm (2′ 3″) x 2000mm (6′ 6″) (aperture)

Minimum size for your greenhouse base:

5310mm (17′ 5″) x 5310mm (17′ 5″)

Customise your Greenhouse

More Sizes:

Select your Colour:

Add Ventilation and Shading?

Qty 1
Curtain Shading
+ £27

Curtain shading will protect your plants from sun scorch and provide shade to moderate temperature. 6ft x 8ft.

Qty 1
Louvre Vent
+ £79

A louvre window brings fresh cool air into your greenhouse to moderate the temperature inside. An essential add on.

Qty 1
Janssens Sunscreen Shading
+ £129

Add the Janssens retractable shading kit for ease of use

Additional Roof Vent
+ £99

Add roof ventilation to your greenhouse to help moderate the temperature

Qty 1
Janssens Side Vent
+ £150

Help recirculate the air in your greenhouse with a side vent or two!

Qty 1

Add Staging and Doors?

Qty 1
Janssens Silver Seed Tray Shelving
+ £295

Add the Silver Full Width 458cm long Seed Tray Shelving to the rear of your greenhouse to help retain your floor space

Qty 1
£15 off
1 Tier Staging Colour Matched
+ £74

This 1 Tier Vitavia Colour Matched greenhouse staging gives you a handy work surface and storage area. Dimensions: 76cm (H) x 50cm (D) x 120cm (W)

Qty 1
Janssens Integrated Colour Matched Shelving
+ £55

Add the Colour Matched 150cm long x 23cm wide integrated shelving to your greenhouse to help retain your floor space

Qty 1
£23 off
2 Tier Staging Colour Matched
+ £96

This 2 Tier Vitavia Colour Matched greenhouse staging gives you a handy work surface with additional low level storage. Dimensions: 76cm (H) x 50cm (D) x 120cm (W)

Qty 1
£10 off
Top Tier Staging Extension Colour Matched
+ £49

This little top level Colour Matched shelf attaches to 1 or 2 Tier staging to give you a bit more storage space

Qty 1
Qty 1
Additional Double Hinged Door
+ £799

Add more access points to your greenhouse with an additional set of double doors

Qty 1

Add Extras?

Hygrometer
+ £17

This Hygrometer will measure the humidity levels inside your greenhouse.

Soil Thermometer
+ £29

This Soil Thermometer will let you track the temperature of your soil inside the greenhouse.

Max/Min Thermometer
+ £23

This thermometer will tell you your maximum daytime temperature as well as record the lowest night time temperature in your greenhouse.

100L Mini Rainsaver Water Butt
+ £54

Add this 100L water butt kit that includes: Butt, Tap & Lid - Black Stand

Qty 1

The 17ft x 17ft Janssens Gigant Hobby Greenhouse will fit all of your professional growing needs perfectly. The vast growing area and super strong construction ensure that you can grow a variety of plants and vegatables year round. You'll get the strongest Aluminium greenhouse on the market with full modern box section construction, vital for weather resistance, especially in very strong storms and winds. Custom lengths are available in 2ft increments so we will have a size to suit all needs.

All Janssens Gigant Greenhouses are built around a strong box-section aluminium frame, with 4mm Toughened Glass held in with proper rubber glazing gasket to take on the worse of UK weather!

Can't find the size or specification to suit your needs?

Most Janssens Greenhouses are fully customisable.

Call us on 0800 098 8877 for your Free Quote!
Palram Silver Steel Base
Included with ALL Janssens Greenhouses.

The Janssens Foundation Base eliminates the need for a full concrete foundation. Simply assemble your greenhouse and secure it with our quick 4-corner anchoring system!

Premium 4mm Toughened Glass

JANSSENS delivers superior protection with our full-length 4mm toughened glass. Six times stronger than ordinary glass, it offers exceptional durability and safety. Enjoy crystal-clear views and peace of mind, knowing you're shielded by the industry's safest greenhouse glass. Polished edges ensure easy, safe assembly, letting you focus on what truly matters – your thriving garden.

Janssens Glazing Gasket
Weather-Tight Seal: Superior Protection Guaranteed

Don't let wind effect your investment with Janssens state-of-the-art glazing system. Featuring:

  • Advanced rubber strip technology
  • Unbeatable water and wind resistance
  • Seamless, long-lasting seal
Janssens Glazing Bars
Industry-Leading Strength in Every Frame

Janssens cutting-edge tubular aluminium glazing bars are among the sturdiest in today's greenhouse market. Enjoy peace of mind knowing your investment is protected by top-tier materials that outlast and outperform the competition!

Janssens Roof Ridge Profile
Built to Last: Premium Stainless Steel Hardware

Every bolt, nut, and fitting in your JANSSENS greenhouse is crafted from top-quality stainless steel to withstand the elements,

Janssens Roof Ridge Profile
Smart Water Management System Included

Maximize your growing potential with our comprehensive water control solution:

  • Efficient gutters to collect rainwater
  • Clever condensation channels to manage humidity
  • Large 40mm downpipes for rapid drainage
Janssens Instructions
Effortless Assembly at Your Fingertips

Set up your new greenhouse with ease. Every model includes:

  • Detailed step-by-step manual
  • Comprehensive assembly video
Janssens Qualicoat Powder Coating
Lasting Beauty: Premium Powder-Coated Finish

Janssens only use Qualicoat-certified powder coating on all of their Greenhouse products. This high-quality finish ensures your JANSSENS greenhouse stays stunning for years. Contact us for custom RAL colours.

Janssens Greenhouse
Janssens Greenhouses

Janssens Greenhouses were established in 1946 in Lier, Belgium and is now a super modern 6500sqm production facility equipped with the very latest high-tech automated machinery. Many years of production and the very latest design and manufacturing processes make a Janssens Greenhouse one of the best high end greenhouses you can buy today.

Janssens Greenhouse 13 Year Warranty
13 Year Warranty

Janssens greenhouses come with a 10-year warranty on the greenhouse frame. This warranty covers any manufacturing defects in materials or workmanship. However, it does not cover glass or polycarbonate. The warranty is only valid if the greenhouse is assembled according to the provided instructions.

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