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Use code SPRING15 at checkout min order £499
(greenhouses)

10x20 Janssens Master Victorian Greenhouse

Quick Code: P172875
Greenhouse Size Diagram

Greenhouse Dimensions

A: Greenhouse width

3100mm (10′ 2″)

B: Greenhouse depth

6060mm (19′ 11″)

C: Ridge height

2740mm (9′)

D: Eaves height

2010mm (6′ 7″)

E & F: Door Size

700mm (2′ 4″) x 2000mm (6′ 7″) (aperture)

Minimum size for your greenhouse base:

3100mm (10′ 2″) x 6060mm (19′ 11″)

Toughened Glass Glazing

Toughened glass, also known as tempered glass, is a high-strength and durable glazing material that is ideal for greenhouses. It undergoes a special heat treatment process that enhances its resistance to impact, making it less likely to break or shatter. In the rare event of breakage, toughened glass crumbles into small, granular pieces, reducing the risk of injury. Gardeners and plant enthusiasts value toughened glass for its safety, longevity, and ability to provide a clear and well-lit environment for optimal plant growth.

sku:MV36

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Urban Models - Within 8 weeks

Master Models - Within 10-12 weeks

All other Models - Within 16 weeks

  • 3100mm x 6060mm Dimensions (10ft 1" x 19ft 8")
  • 2m High Eaves
  • Aluminium Frame with Tubular and Box Section for Superior Strength.
  • Green or Black Powder Coated Frame.
  • Box Section Base Plinth.
  • Victorian Greenhouse Roof Crestings.
  • Double Sliding Locking Doors
  • 4mm Full Length Toughened Safety Glass
  • Rubber Glazing Gasket Strips (no fiddly clips)
  • 4x Roof Vents
  • 11 Blade Louvre Vent
  • Gutters and 40mm Aluminium Downpipes.
  • Stainless Steel Fittings.
  • Step by Step Instruction Manuals with Instructional DVD.
  • 13 Year Manufacturers Warranty.
  • Many Accessories Available - Scroll down this page.

This 10ft x 20ft Janssens Master Victorian Greenhouse is the top of the Janssens Helios Master range, the biggest, the best. Modern greenhouse design and materials meet old time Victorian Greenhouse styling. Roof Cresting and Finials sit along the super stiff box section roof ridge. Depending on your garden or personal preference, choose a green or black powder-coated frame.

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

Options: Click options to add them to your order then click "Buy Now"

1: Select your Size

2: Select your Frame Colour

3: Recommended Accessories Discount Pack (15% OFF)

Janssens Colour Matched Full Length Integrated Staging
Janssens Colour Matched Full Length Integrated Staging
£32 OFF
+ £183
Janssens Silver Integrated Staging
Janssens Silver Integrated Staging
£18 OFF
+ £102
Auto Roof Vent Opener
Auto Roof Vent Opener
£7 OFF
+ £42
Kit:(Janssens Colour Matched Full Length Integrated Staging + Janssens Silver Integrated Staging + Auto Roof Vent Opener)

Save on our recommended accessories kit for this greenhouse.

£58.00 OFF!!
Bundle Price +£326

Click to Add

6: Staging

Janssens Colour Matched Full Length Integrated Staging
Janssens Colour Matched Full Length Integrated Staging

Add the Colour Matched Full Length 606cm long integrated shelving to the side of your greenhouse to help retain your floor space

+ £215
Qty 1
Click to Add
Janssens Colour Matched Seed Tray Shelving
Janssens Colour Matched Seed Tray Shelving

Add the Colour Matched Full Width 236cm long Seed Tray Shelving to the rear of your greenhouse to help retain your floor space

+ £325
Qty 1
Click to Add
1 Tier Staging Colour Matched
SAVE £15 17%OFF
1 Tier Staging Colour Matched

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)

+ £74
Qty 1
Click to Add
Janssens Integrated Colour Matched Shelving
Janssens Integrated Colour Matched Shelving

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

+ £55
Qty 1
Click to Add
2 Tier Staging Colour Matched
SAVE £23 19%OFF
2 Tier Staging Colour Matched

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)

+ £96
Qty 1
Click to Add
Top Tier Staging Extension Colour Matched
SAVE £10 17%OFF
Top Tier Staging Extension Colour Matched

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

+ £49
Qty 1
Click to Add
Janssens Silver Integrated Staging
Janssens Silver Integrated Staging

Add the Silver 150cm long x 53cm wide integrated staging to your greenhouse to help retain your floor space

+ £120
Qty 1
Click to Add

7: Ventilation and Shading

Auto Roof Vent Opener
Auto Roof Vent Opener

This automatic opener for your roof vents will automatically open your roof vents to ventilate your greenhouse when it becomes too hot.

+ £49
Qty 1
Click to Add
Curtain Shading
Curtain Shading

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

+ £27
Qty 1
Click to Add
Louvre Vent
Louvre Vent

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

+ £79
Qty 1
Click to Add
Auto Louvre Opener
Auto Louvre Opener

This automatic opener mechanism will open your louvre window for you when you’re not around. No need to worry about ventilation, this does it automatically for you! (Does not include louvre window).

+ £40
Qty 1
Click to Add
Janssens Sunscreen Shading
Janssens Sunscreen Shading

Add the Janssens retractable shading kit for ease of use

+ £129
Click to Add

8: Extras

Hygrometer
Hygrometer

This Hygrometer will measure the humidity levels inside your greenhouse.

+ £17
Click to Add
Soil Thermometer
Soil Thermometer

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

+ £29
Click to Add
Max/Min Thermometer
Max/Min Thermometer

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

+ £23
Click to Add
100L Mini Rainsaver Water Butt
100L Mini Rainsaver Water Butt

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

+ £54
Qty 1
Click to Add

9: Greenhouse Installation

For peace of mind, why not your new greenhouse installed by a certified greenhouse installer.

Please Note: installation can only be carried out using the Optional Base Plinth (if available) onto a flat level surface such as slabs, concrete or decking that is to the Minimum base size stated in the dimensions diagram. Installation is for the Greenhouse, the fitting of downpipes, autovents, louvres, roof vents and cresting only and does not include groundworks, staging, accessories.

Greenhouse Installation
Greenhouse Installation

We are currently able to offer installation in the following postcodes:

B, BA, BB, BD, BL, BN, BS, CA, CB, CH, CO, CR, CT, CV, CW, DA, DE, DG, DH, DL, DN, DY, EH, GL, GL, GU, HD, HG, HP, HU, HX, IP, KA, KT, L, LA, LE, LL, LN, LS, M, ME, MK, ML, NE, NG, NN, NR, OL, OX, PE, PR, RG, RH, S, SE, SG, SK, SM, SN, ST, SW, SY, TD, TF, TN, TS, TW, WA, WF, WN, WR, WS, WV, YO.

Please Note: installation can be 2-4 weeks after your delivery time.

+ £1,350
Click to Add
Staging/Shelving Assembly
Staging/Shelving Assembly

Please Note, Only Available with Optional Greenhouse Installation.If you've ordered optional installation but don't want to put your staging together, choose this option and let our team assemble it for you.(Price is per Staging).

+ £85
Qty 1
Click to Add

10: Choose your colour

Black Powder Coated Frame
Black Powder Coated Frame

+ £0
Added
Green Powder Coated Frame
Green Powder Coated Frame

+ £0
Click to Add

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10x20 Janssens Master Victorian Greenhouse

£5,740