Understanding Greenhouse Bases and Foundations

We offer a range of greenhouse options with various base dimensions and configurations. The greenhouse base (40mm wide x 80mm tall) is the aluminium frame that sits on the foundation, while the foundation provides solid support — whether that's a concrete slab, nib wall, or stakes.

The foundation is supplied by the customer, which is why we provide detailed guides to ensure correct dimensions are built. Proper installation ensures your greenhouse withstands the elements and lasts for years.

Key Considerations:

• Surface vs. Flush Mount: Surface mount brackets are L-shaped and attach the greenhouse to a wider or centred footing. Flush mount brackets align the base directly with the edge of the foundation.
  
• Part Numbering: Brackets and components are labelled with a part number followed by length in millimetres (e.g., L630-3220 = profile L630, 3220mm long). Always confirm part numbers when ordering foundation components.
• Bracket Placement: We recommend attaching brackets internally for a tidier finish, though inside or outside placement is possible depending on your preference.
• Brackets Included by Model Size:
  • All 10ft wide standard greenhouses include surface mounting brackets and 80mm corner joiners.
  • 6ft wide 16ft+ and 8ft wide 16ft+ models also include surface mounting brackets and corner joiners.
  • Smaller models include 300mm corner stakes for ground installation. Foundation mounting kits (flush or surface, pack of 12) are available to purchase separately.
  
• Extension Models (16ft+): Include a partition wall that protrudes 500mm into the greenhouse and requires footing support underneath.
• Multizone Greenhouses (10x12, 10x16, 10x20, 10x24): Feature an internal sliding door with the base running continuously underneath — footing support across this span is required.
• Elite Series: Sit on a 600mm nib wall built by the customer. The glasshouse base attaches internally flush with the brickwork using W05A flush mount brackets.

For all models, we recommend consulting a local builder or engineer to ensure compliance with building codes and site-specific conditions. Professional installation services are available — visit our installers page to find a recommended installer near you.

How Do I Place an Order?

You can purchase through one of our retailers, or directly through our website. Buying through our retailers offers free shipping and expert support.

If you need help, email sales@GHCO.co.nz.

Are Your Greenhouses Made in New Zealand?

Yes! Our greenhouses are made in our factory in Kumeu and are Certified New Zealand Made. Designed for local conditions, they offer durability, support, and peace of mind.

Do I Need Consent?

Most kitset greenhouses don't require consent if under 30 square metres. Larger models or public installations may require documentation, which we can help provide.

Kitset Greenhouse Delivery

Greenhouses are shipped to the nearest Mainfreight depot due to weight. You'll need a trailer to collect them, and the depot will forklift the crate onto it.

Learn more on our shipping page.

What Tools Do I Need for Assembly?

• Cordless impact driver (with supplied 10mm nut setter/socket)
• Phillips head screwdriver
• Set square, spirit level, tape measure
• Scissors or sharp knife
• Bucket of warm soapy water (helps with rubber beading)

Where Can I Find Base Dimensions?

Go to the product page of your greenhouse size and click 'Download Foundation Page' to get the base dimensions.

How Difficult Is Assembly?

Watch our installation videos to decide. Most greenhouses can be built with patience and time, but if you'd rather have it assembled professionally, check out our installation services.

For reference, an 8x8ft greenhouse takes two people about a day to build.

Why Choose Us?

Unlike many competitors, we display our greenhouses in retail outlets. Cheaper alternatives may lack:

• Sturdy framing guaranteed not to rust
• 4mm toughened safety glass
• New Zealand manufacturing and customer support

A quality greenhouse saves frustration, expense, and ensures long-lasting durability.

Height-to-Boundary Rules

See Auckland council rules on height to boundary.

Download Our Customer Brochure

Get detailed product information in our customer brochure.