Greenhouse Kit Comparison table.  The kits are listed by [width x length] from the smallest to the largest.  Follow the link for more information / options. 

Size / Photo

Frame / Glazing

Description

Cost / $/ft²

Extras

4x6
 

Aluminum / Twin-wall Polycarb

Gardener's Supply -  4'x6' Fast Start Greenhouse   At last! A Compact Greenhouse that doesn't cut corners.  Packed with features.  4'x6'

$699 /
$29/ft²

Temperature controlled vents

6x8
 

Aluminum / Twin wall Polycarb

Gardener's Supply  6'x8' Garden Starter Greenhouse   - Full size, Full-Feature Greenhouse for Under $1000.   Tough corrrosion-free aluminum frame and rigid polycarbonate double glazing that seals in warmth and moisture.  8'x6' interior.

$995 /
$21/ft²

Temperature controlled vents

8x8
 

Attached to house* - Aluminum / 2-wall Tedlar

Gardener's Supply  8' x 8' Home Attached Northern Light Greenhouse   - An attached, efficient greenhouse with high light transmission (90%).  Can be extended in increments of 4 to 8 feet.  The "Best" option includes a 3-tier custom fit North Wall Bench, Vent Screens and our dual-purpose, professional quality ThermaPro Day/Night Curtain.

$3,731 - $4,527
/ $58/ft^{2 -} $71/ft²

• 10-Year Warranty

• No-Risk Home Trial

• Easy Purchase Plan

• Free Automatic Venting

8x10 or 8x14
 

Wood Shed / Vinyl

A multi-use garden house that's a greenhouse, storage shed, and private backyard getaway all-in-one.

• Gardener's Best SunShed   The "BEST" model includes a UV-stabilized polypropylene shade cloth, custom fit potting bench, pegboard storage system and a pressure treated floor.

• Classic Sunshed   The "CLASSIC" is most popular model comes with a storm/screen aluminum window in the gable end, and a heavy-duty floor. The floor is constructed of pressure-treated tongue-and-groove 1/2" plywood on a 2 x 4 fully framed base.

• Choice Sunshed   The "CHOICE" model comes without a floor. It does include a storm/screen aluminum window and dutch door in the gable ends. The Gardener's Choice SunShed is ideal for installing on an existing deck, or when using a brick, crushed stone, gravel or dirt floor.

BEST
 - 8x10 $3,431
 - 8x14 $4,540

CLASSIC
- 8X10 $2,632
- 8X14 $3,621

CHOICE
- 8X10
$2,192

/ $27/ft²

10-Year Warranty

No-Risk Home Trial

Easy Purchase Plan

10x12
 

Aluminum / 2-wall Tedlar

Gardener's Supply  10'x12' Northern Light Greenhouse   - A large, efficient greenhouse with high light transmission (90%).  Can be extended in increments of 4 to 12 feet.  The "Best" option includes a 3-tier custom fit North Wall Bench, Vent Screens and our dual-purpose, professional quality ThermaPro Day/Night Curtain.

$4,390 - $5,559

/ $37/ft^{2 -}

• 10-Year Warranty

• No-Risk Home Trial

• Easy Purchase Plan

• Free Automatic Venting

10x16
 

Aluminum / 2-wall Tedlar

Gardener's Supply  10'x16' Northern Light Greenhouse - A large, efficient greenhouse with high light transmission (90%).  Can be extended in increments of 4 to 12 feet.  The "Best" option includes a 3-tier custom fit North Wall Bench, Vent Screens and our dual-purpose, professional quality ThermaPro Day/Night Curtain.

$5,496 - $7,137

/  $34/ft^{2 -}

• 10-Year Warranty

• No-Risk Home Trial

• Easy Purchase Plan

• Free Automatic Venting

12x12
12x16
12x24
 

Wood & PVC / 6mil UV Poly

Grow Houses   - If you're an ambitious gardener who needs plenty of greenhouse space, we have a low-cost greenhouse for you — and you don't have to make compromises. The Grow House has many features found in commercial models.

$459 - $579

/ $3/ft^{2 -} $2/ft²