About Our Janssens Urban Greenhouses
Janssens Urban Greenhouses are purpose-built for smaller UK gardens, patios, and even larger balconies where space is at a premium. Measuring just 5ft 3" deep by 7ft 8" wide, these compact Belgian-engineered structures deliver professional growing conditions without dominating your outdoor space. Each model features 4mm toughened safety glass throughout, a robust box-section aluminium frame, and intelligent design touches like the unique side-door placement that maximises your internal growing area.
The range includes two distinct styles. The Janssens Urban Hobby 5x8 features clean-lined contemporary styling, whilst the Janssens Helios Urban 5x8 adds Victorian roof cresting in Black or Green.
Need more detail? For a full breakdown of features, base preparation, and assembly, read our Complete Janssens Urban Greenhouse Buyer's Guide.
Model Comparison: Urban Hobby vs Helios Urban
| Feature | Urban Hobby 5x8 | Helios Urban 5x8 (Black) | Helios Urban 5x8 (Green) |
|---|---|---|---|
| Frame Colour | Silver aluminium | Black powder-coat | Forest green powder-coat |
| Roof Style | Contemporary flat ridge | Victorian ridge cresting | Victorian ridge cresting |
| Glass Specification | 4mm toughened throughout | 4mm toughened throughout | 4mm toughened throughout |
| Door Position | Gable end (side placement) | Gable end (side placement) | Gable end (side placement) |
| Warranty Period | 13 years | 13 years | 13 years |
| Base Plinth | Matching silver box-section | Matching black box-section | Matching green box-section |
| Ventilation | 11-blade louvre vent | 11-blade louvre vent | 11-blade louvre vent |
| Typical Price | £2,300 | £2,500 | £2,500 |
| Best For | Modern gardens, minimalist styling | Period properties, contemporary contrast | Traditional gardens, natural integration |
Frequently Asked Questions
-
What's the difference between Janssens Urban Hobby and Helios Urban?
The Helios Urban adds Victorian-style roof cresting and a powder-coated frame in Black or Forest Green. The Hobby features a standard silver aluminium finish. Structurally, they are identical in size, glass, and warranty.
-
How much does a Janssens Urban greenhouse cost, and what's included?
Models start from £2,300. This includes the frame, 4mm toughened glass, base plinth, louvre vent, and guttering. Free UK mainland delivery is standard.
-
What base do I need for a Janssens Urban greenhouse?
You need a perfectly level base (paving slabs or concrete) measuring at least 5ft 6" x 8ft. The compact size makes this a manageable DIY project. See our Greenhouse Base Guide for full instructions.
-
Can I install a Janssens Urban greenhouse on a balcony or patio?
Yes, patio installation is straightforward. For balconies, you must first verify it can support the 180kg+ weight. Always consult a structural engineer or your building manager.
-
How long does Janssens Urban greenhouse assembly take?
A competent DIYer can complete assembly in 6-8 hours. We also offer a professional UK Installation Service that finishes the job in a single day.
-
What can I grow in a Janssens Urban greenhouse?
The 38 sq ft area is perfect for tomatoes, peppers, and cucumbers. We recommend adding Greenhouse Staging to double your space for seed trays and pots. All compatible accessories are listed on each product page.
-
Why is the door on the gable end instead of the front?
The side-door placement is a deliberate space-saving design. It allows you to place the greenhouse against a wall and still access both 7ft 8" long sides for planting.
-
Does the 13-year warranty cover the glass and frame?
Yes, the 13-year Janssens warranty covers both the aluminium frame and the glass panels against manufacturing defects, provided it's installed correctly on a suitable base.
Why Choose Greenhouse Stores?
Official UK Stockist with Expert Support
We are authorised Janssens retailers with 15+ years of experience. We verify every accessory for a perfect fit and handle all warranty claims directly with the manufacturer for you.
Realistic Delivery and Installation
Free UK mainland delivery typically takes 7-10 working days. If you choose our installation service, our professional teams will have your greenhouse built in a single day.
Honest Guidance on Product Limitations
The Urban's 5ft 3" depth is optimised for side-access growing. If you need a central path, we'd recommend an 8ft-wide model instead. We're here to match you with the right greenhouse, not just make a sale.
Ready to Transform Your Small Space?
Browse our complete range of Janssens Urban Greenhouses above. Each product page shows your chosen model with compatible accessories, real pricing, and current stock levels. Questions? Our team is available on 0800 098 8877.