Riga Grand Greenhouse
Riga Grand Greenhouse
Riga Grand Greenhouse
Riga Grand Greenhouse
Riga Grand Greenhouse
Riga Grand Greenhouse
Riga Grand Greenhouse
Riga Grand Greenhouse

Riga Grand Greenhouse


$7,995.00 Regular price

  • Ships directly from manufacturer - departs in about 7-10 business days
  • Inventory on the way

100% Money-Back Guarantee

When you have finished the assembly of this greenhouse, we are confident you will be completely satisfied with the quality of the product. View Details.

Dimensions 9' 8" W x 17' 6" L x 7' 7" H
Sidewall 3'
Frame Heavy Gauge Extruded Aluminum
Color Silver
Covering 8mm Twinwall Polycarbonate Panels on Roof and Sidewalls; 10mm Twinwall Polycarbonate on Endwalls
Door(s) 30" W x 6' H - Heavy Duty Dutch Door with Keyed Lock
Roof Vents 4 - 40" x 24" (Automatic)
End Vents 1 - 30" x 41"
Side Vents 0
Base Included
Foundation Options - Stakes; Treated 4x4's; Concrete Piers or Slab
More foundation information
Warranty Riga Greenhouse Warranty
Frame - 15 years; Covering - 10 years
Manual Included

The German engineered Riga Greenhouses have beautiful and practical designs combined with quality, long-lasting parts and pieces.

Easy to Assemble

The Riga features a sturdy rustproof, extruded aluminum frame. The unique "channel" design of the aluminum components allows for simple "slide and fit" assembly, thus saving time and money. Easy to understand step by step assembly instructions are included with every structure.


With the thickest twin wall polycarbonate offered on a backyard greenhouse, the Riga hobby greenhouse carries the highest R factor of any hobby greenhouse on the market. This makes the Riga less expensive to heat.


Most hobby greenhouses manufactured today offer 4mm or 6mm polycarbonate covering. The Riga hobby greenhouse carries the highest R factor of any hobby greenhouse on the market. It is covered with sturdy 8mm twin wall polycarbonate on the roof and side walls and the end walls are covered with heavy duty 10mm twin wall polycarbonate. This kind of covering provides better insulation making your Riga greenhouse easier to keep cool in the summer and warm during the winter months. The "onion" shape helps shed heavy snow loads.

Doors and Vents

The extra wide 30" heavy duty dutch door with keyed lock is wide enough to easily pass a wheel barrow through. The extra wide 40" x 24" automated roof window(s) and oversized 30" x 42" gable end window maximize the benefits of natural ventilation.

Base Kit

Riga Base

Heavy-duty 6" tall extruded aluminum base for the Riga Greenhouse. Base can be placed directly on ground and if you choose, can be filled with sand, peagravel or concrete. Greenhouse frame slides directly onto base.

Order by Phone

We understand that you may want to talk to an actual person instead of ordering online. Call us toll-free at 1-888-281-9337 to speak to a Greenhouse Megastore Sales Representative.


This item ships via Motor Freight Carrier - almost anywhere in the Contiguous United States

Motor Freight Requirements

  • The shipment must be delivered to a business or residence (a PO Box is invalid)
  • The delivery address must be able to accommodate a tractor/trailer as much as 70' in length
  • Someone must be present to receive and unload the shipment from the truck
  • Shipments and/or locations requiring a lift gate, inside delivery, and/or with limited access may incur additional charges by the carrier

Please contact Greenhouse Megastore Customer Service at 1-888-281-9337 if you have any questions about delivery to your specific address so we can ensure the smoothest delivery possible!

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Customer Reviews

Based on 2 reviews
Legacy Review
Wondeful..this is the one to buy

We bought this greenhouse in 2013. Delivery was excellent. Everything went together in less than a weekend. This is the one to buy. After eight years it's still in great shape. We installed it on 6 concrete piers (4 corners + 2 on the long sides) make by digging a holes and using concrete tubes from Lowe's. Leveled the tube tops, filled with concrete, let set, then bolted the base down. I added a paver floor and a frost-free hydrant.

Legacy Review
Great Choice

After review of many home size greenhouses, picked the riga for efficiency and eligance. Kit arrived quickly with good support. Built in 1 1/2 days w help from two others to piece big sections together on pre-poured concrete stem walls. Result is a very strong, roomy and warm greenhouse. My wife is very hsppy.