Find the Perfect Greenhouse Size for Your Garden
Does size matter?
| Size | Description | Link |
|---|---|---|
| 4 x 6 | Perfect for small gardens or first-time buyers | View 4 x 6 Greenhouses |
| 6 x 4 | Great for narrow spaces along fences or walls | View 6 x 4 Greenhouses |
| 6 x 8 | Balanced space for serious hobby growers | View 6 x 8 Greenhouses |
| 8 x 6 | Wide layout for easier access and bigger crops | View 8 x 6 Greenhouses |
| 10 x 8 | Maximum room for mixed growing and storage | View 10 x 8 Greenhouses |
More information
Choosing the right greenhouse size is one of the most important steps in planning your garden setup. Whether you're just getting started or upgrading to a larger structure, it's essential to consider how much growing space you'll need, how much room you have available, and how you plan to use your greenhouse.
A compact model like a 4 x 6 or 6 x 4 greenhouse is ideal for small gardens, patios, or beginners who want a manageable space for growing herbs, lettuce, or starting seedlings. These smaller greenhouses are quick to assemble, easy to heat, and work well when space is limited.
For those with more ambition, a 6 x 8 or 8 x 6 greenhouse provides the flexibility to grow a wider variety of crops, use both sides for shelving, and even walk comfortably through the centre. These are popular with hobby gardeners who want space to grow and store equipment while still maintaining a compact footprint.
Larger sizes such as 8 x 10 or 10 x 12+ are suited to experienced growers or those looking to produce vegetables year-round. These greenhouses offer excellent airflow, accommodate raised beds and taller plants, and can even double as an orangery or workspace with seating. To help you compare and choose, we've organised all our models below by size category, including exact dimensions and surface area. Whether you're growing a few herbs or planning a self-sufficient harvest, there's a size that's perfect for your space, your plants, and your lifestyle.
Greenhouse Comparasion
| Size Category | Model | Dimensions (L × W × H cm) | Area (m²) |
|---|---|---|---|
| Mini Greenhouse | |||
| Essential Small Black 114 cm | 114 × 178 × 195 | 2.03 | |
| Essential Small Black 225 cm | 225 × 178 × 195 | 4.01 | |
| Small Greenhouse (4x6, 6x4) | |||
| Premium Black 232 cm | 232 × 228 × 230 | 5.29 | |
| Medium Greenhouse (6x8, 8x6) | |||
| Premium Black 307 cm | 307 × 228 × 230 | 7.00 | |
| Large Greenhouse (8x10) | |||
| Premium Black 382 cm | 228 × 382 × 230 | 8.71 | |
| Glory 6.2 m² – Grey | 253 × 244 × 268.5 | 6.18 | |
| Glory 9.2 m² – Grey | 253 × 364 × 268.5 | 9.22 | |
| Bella 6 m² – Silver | 244 × 244 × 219 | 5.95 | |
| Bella 9 m² – Silver | 244 × 367 × 219 | 8.96 | |
| XL Greenhouse (10x12+) | |||
| Premium Black 457 cm | 228 × 457 × 230 | 10.42 | |
| T-shaped Premium Black | 382.5 × 382.5 × 230.5 | 14.63 | |
| Glory 12.2 m² – Grey | 253 × 484 × 268.5 | 12.25 | |
| Glory 15.3 m² – Grey | 253 × 604 × 268.5 | 15.29 | |
| Bella 12 m² – Silver | 244 × 489 × 219 | 11.92 | |
| Bella 14.7 m² – Silver | 244 × 604 × 219 | 14.75 | |
| Bella 17.6 m² – Silver | 244 × 723 × 219 | 17.63 | |
| Bella 20.6 m² – Silver | 244 × 843 × 219 | 20.58 | |
| Bella 22.5 m² – Silver | 923 × 244 × 219 | 22.53 | |
Which Size Should You Choose?
Step 1: Define Your Purpose
What do you want to grow? A few herbs and tomatoes or an extended vegetable garden? Your ambitions will shape your needs. Many gardeners outgrow their first greenhouse within a year, so if you're serious about growing, consider sizing up.
Step 2: Measure Your Space
Be realistic about the space available in your garden. Measure carefully and think about sunlight, shading, access, and nearby structures. Avoid cramping your outdoor area with an oversized greenhouse, but also don’t undershoot and end up with a tight, unusable space.
Step 3: Plan the Layout and Access
Think about how you’ll move inside the greenhouse. Is there room for shelves and potting benches? Double doors can help if you plan to use wheelbarrows or equipment. A wider layout often ensures better light and airflow compared to a narrow, long design.
Step 4: Set Your Budget and Choose Materials
Larger greenhouses cost more but offer more options and flexibility. Compare aluminium, polycarbonate, and glass options—and think about long-term durability. A slightly bigger or modular greenhouse can save money over time and allow you to expand as needed.
Step 5: Think Long-Term
Your gardening hobby will likely grow—just like your plants. Plan for extra space for overwintering, experimenting, or adding new varieties. If you're unsure, choose a design that can be extended later. It's better to have too much room than too little.
Tip:
Most greenhouse owners say they wish they had gone one size larger. If you’re in doubt, take one step up—you’ll likely grow into it faster than you expect.
Frequently Asked Questions About Greenhouse Size
What is the best greenhouse size for beginners?
A 6x4 or 6x6 ft (approx. 1.8x1.2 or 1.8x1.8 m) greenhouse is ideal for beginners. It offers enough space to start growing vegetables or herbs without being overwhelming.
How much space should I leave around the greenhouse?
Ideally, leave at least 60–80 cm of space on all sides for easy access, maintenance, and cleaning. This also improves ventilation and light exposure.
Is a larger greenhouse always better?
Not necessarily. While more space provides flexibility, it also means higher costs, more heating, and more maintenance. Choose a size that matches your current and near-future needs.
Can I extend my greenhouse later?
Some modular greenhouses can be extended with additional sections. Check with the manufacturer before purchase if future expansion is important to you.
Do I need planning permission for a greenhouse?
In most areas, small domestic greenhouses do not require planning permission. However, check your local regulations, especially for larger or permanent installations.