Santa Barbara | 6ft or 9ft Wide Montecito Aluminum Lean-To Greenhouse Kit / Sun Room With 8mm Twin-wall Polycarbonate Glazing

Santa Barbara


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Our Shipping Policy Page has details of our Free Shipping to the 48 contiguous states with Lift gate Service included, as well as other things you should know.

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Before You Purchase

Before you Purchase has several things to consider before ordering a large greenhouse or building. You should also review our Refund Policy.

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The Santa Barbara Montecito 6ft or 9 ft Wide Lean-To Greenhouse is built with a ruggedized, heavy-duty, exclusive “Insalume” frame.  This provides added durability. It is available in a wide range of sizes to fit any yard and growing capacity.

The strong aluminum frame is highly insulated with 8mm twin-wall polycarbonate panels that slip perfectly into the pre-cut channels in the frame, to create dead air spaces that serve as insulation. No bar caps or gaskets are needed because of this smart design, and everything is bolted together with hefty 16 gauge steel plates to create a sturdy and durable structure.

The lean-to greenhouse can fit into a narrow space against your house or garage. If located against your house, it will reduce heating costs. If placed over a door or window, the heat from your home can be utilized to maintain growing temperatures throughout winter. Another advantage is the easy access from your home into your greenhouse. Locate your greenhouse where it will receive the most sunlight possible November through January.

The Santa Barbara Montecito Lean-To Greenhouse Kit  is designed for ease of assembly.  Depending on how much help you have, it can be erected in just 2 or 3 days. All parts are pre-cut and pre-drilled at the factory and all the hardware is sorted for your convenience.

Clear and fully-illustrated directions are included, and technical support is available direct from the manufacturer if needed. The Santa Barbara Montecito Lean-To Greenhouse is sure to bring your family many years of use and enjoyment.

The Santa Barbara Greenhouses/Sun Rooms are made entirely in America.


  • CUSTOM ORDERS, NO RETURN - Santa Barbara greenhouses are built to order and will ship in three months or less (due to COVID backorder) and so it cannot be returned.  Please call us if you have any questions or concerns.
  • BUILDING RESTRICTIONS - Please check with your Home Owner Association and local zoning office for any required permits and issues pertaining to zoning, setbacks, or restrictive covenants.
  • IMAGE DISCLAIMER - Some images may not be to scale and/or show building with optional contents or accessories such as furniture or shelving that are not included.
  • SEALING NEEDS - No gaskets are needed though foam or rubber weather stripping can be use along with color-matched caulking to create a watertight seal against the attached structure.
  • Frame:  Aluminum, All Bolt Construction
  • Frame Color: Mill Finish or Bronze Powdercoat
  • Rafter Ties for Extra Strength
  • Side Wall Height: 6 ft
  • Peak Height:
    6ft wide greenhouse: 8ft 2in
    9ft wide Greenhouse: 9ft 3in
  • Glazing: Commercial grade 8mm twin-wall polycarbonate side walls with polycarbonate roof.  It filters harmful UV-rays and allows about 80% light transmission
  • Panel width: 4ft
  • Door: Hinged Dutch door with upper and lower half: 24x75 inches height
  • Small plants can be hung from rafters
  • All necessary heavy-duty galvanized hardware is included
  • Includes steel brackets and lag bolts for attaching to a home; customer will supply expansion bolts if needed
  • All parts are pre-cut and pre-drilled.  The kit is designed for simple assembly in 2-3 days
  • Detailed installation guide with pictures and step-by-step instructions
  • Friendly technical support available from Santa Barbara Greenhouses for installation help
  • Proudly made in the U.S.A.
  • Financing available through Affirm or PayPal.
  • Exterior Dimensions: 6ft wide and 9ft wide are available.  Please see variants.
  • Peak Height:
    6ft wide greenhouse: 8ft 2in
    9ft wide Greenhouse: 9ft 3in
  • Side Wall Height: 6ft
  • Panel Width: 4ft
  • Door: Hinged Dutch door with upper and lower half: 24x75 inches height

10 year limited warranty on polycarbonate
1 year limited warranty on parts
Santa Barbara Greenhouses guarantees against defects in manufacturing and workmanship

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Ask a Question
  • Do the Santa Barbara lean-to anchor to the wall in any way?

    Yes, all the Santa Barbara lean-to's must be anchored to a wall for wind and sealing. 

    For the deluxe redwood models, we provide ledger boards and lag bolts for this. 
    With the Montecito we provide lag bolts and steel 90 degree brackets.

    Depending on your siding type and wall type, you may need to provide expansion bolts or other methods so that you have a good fit and seal.