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Alton Cheltenham Cedar Greenhouse

Alton Cheltenham Cedar Greenhouse

4.9/5 · 173 verified reviews

A half-boarded Western Red Cedar greenhouse with a tall 10 ft ridge, in four sizes for serious home growers.

Regular price $21,730.00 USD
Regular price $24,200.00 USD Sale price $21,730.00 USD
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“Greenhouse quality is superb and the customer service is outstanding. Thank you to Mulberry Greenhouses!”
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  • Grade 1 knot-free Western Red Cedar, dipped and sealed
  • Cedar lower walls with large toughened glass panes above
  • Roof windows open automatically at 71 degrees, no power needed
  • 10 ft ridge height with a 45 degree roof pitch
  • Shelving, gutters and downpipes included
  • Four sizes from 108 to 181 sq ft, made in the UK
  • 100% free shipping
  • Authorized retailer
  • No sales tax (except georgia)
  • Price match guarantee
Questions before you buy? Talk to a greenhouse specialist: 678-408-8222 or Info@mulberrygreenhouses.com
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Product Description

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EXTRA 13% OFF MANY ALTON GREENHOUSES-DISCOUNT ALREADY INCLUDED. JUST ADD TO CART.

Alton Cheltenham Cedar Greenhouse with Wood Wall

The Alton Cheltenham Cedar Greenhouse is a beautifully designed, durable greenhouse built with the same trusted construction as the Alton Evolution range. Crafted with exceptional attention to detail, it eliminates common rot points and is guaranteed for 10 years untreated—or expected to last 30–40 years when treated.

Features and Specifications of the Alton Cheltenham Cedar Greenhouse

We are currently offering 4 sizes: Here are the common specs of All the Cheltenham Greenhouses

  • 🌳Western Red Cedar : The Alton Evolution models use thick glazing bars which are based on 44x 44mm timbers or 44x69mm in places.
  • 🌳 Extremely strong frame - This is the strongest greenhouse you can currently buy (Combination of wood or aluminum). It really is that sturdy!
  • 🌳 Included: aluminum capping (for additional water protection)
  • 🌳All wood is Grade 1 Western Cedar from Canada dipped and sealed (NO knots)
  • Constructed with mortise-tenon and tongue-groove assembly and stainless steel hardware
  • 🌳 Uses only single sheets of 3mm toughened tempered glass, instead of the more common overlapping smaller sections
  • 🌳 With large pane toughened glass, you get a greenhouse that looks far neater, is easier to keep clean, and of course is safer.
  • 🌳 Shelves included for great horizontal use of space.
  • 🌳 Beautiful English Victorian Ridge Decorations
  • 🌳 One set of Hinged doors that swings inward.
  • 🌳 Very secure Door Lock.
  • 🌳 Guttering and Downpipes both sides are included as standard
  • 🌳 Aluminum base frame designed to raise wood framing from ground exposure
  • 🌳 Knee brace spandrels at EVERY rafter intersection: at both the ridge and the shoulders/gutters.
  • 🌳Extended units also use additional wooden trusses
  • 🌳 Includes: gutters with down spouts
  • 🌳Individual wood pieces will vary greatly in color (light to dark).
  • 🌳 The extra height gives you a better atmosphere for your plants and more headroom for your plants—and for you!
  • 🌳 Made in UK 🇬🇧
  • 🌳 Warranty: 10 Year Limited Warranty.

1st Size: Alton Cheltenham Cedar Greenhouse With Wood Wall 8ft8"x12ft6"x 10ft

Dimensions:

  • A: Base Width 2650 mm (8ft8)
  • B: Length 3846 mm (12ft7)
  • C: Eaves Height 1708 mm (5ft7)
  • Side Wall Height 1708 mm (5ft7)
  • D: Ridge Height 3070 mm (10ft0)
  • E: Door Width 743 mm (2ft5)
  • F: Door height 2012 mm (6ft7)
  • G: Area: 108.33 sq. ft.
  • I: Roof Pitch: 45 degrees

Specs:

  • 🌳 Area: 108 sq. ft.
  • 🌳 Glass Option: Uses toughened safety glass that is 700% tougher than regular horticulture glass.
  • 🌳 4 Roof windows with Automatic Window Openers (opens automatically at 71°, no power needed)
  • 🌳 2 louvered window With Manual Openers
  • 🌳 One set of single Hinged door (Lockable Door with Keys)
  • 🌳 Comes with Slatted Shelves: 1 two slatt shelves (12" wide) and one 4 slatt shelves (20" wide) along one long side of the greenhouse.(top and bottom)
  • 🌳 Victorian Ridge Cresting
  • 🌳 Aluminum Bar Metal Capping
  • 🌳 Tall design – 10 ft for peak height –
  • 🌳 Free 10 Year Guarantee
  • 🌳 Roof Pitch: 45 degrees

2nd Size: Alton Cheltenham Cedar Greenhouse With Wood Wall 8ft8"x16ft8"x 10ft

Dimensions:

    • A: Base Width 2650 mm (8ft8)
    • B: Length 5106 mm (16ft9)
    • C: Side Wall Height 1708 mm (5ft7)
    • D: Ridge Height 3070 mm (10ft0)
    • E: Door Width 743 mm (2ft5)
    • F: Door height 2012 mm (6ft7)
    • G: Area: 144.9 sq. ft.
    • I: Roof Pitch: 45 degrees

Specs:

  • 🌳 Area: 144.9 sq. ft.
  • 🌳 Glass Option: Uses toughened safety glass that is 700% tougher than regular horticulture glass.
  • 🌳 4 Roof windows with Automatic Window Openers (opens automatically at 71°, no power needed)
  • 🌳 3 louvered window With Manual Openers
  • 🌳 One set of single Hinged door (Lockable Door with Keys)
  • 🌳 Comes with Slatted Shelves: 1 two slatt shelves (12" wide) and one 4 slatt shelves (20" wide) along one long side of the greenhouse.(top and bottom)
  • 🌳 Victorian Ridge Cresting
  • 🌳 Aluminum Bar Metal Capping
  • 🌳 Tall design – 10 ft for peak height –The extra height gives you a better atmosphere for your plants and more headroom for your plants—and for you!
  • 🌳 Roof Pitch: 45 degrees
  • 🌳 Free 10 Year Guarantee

3rd Size: Alton Cheltenham Cedar Greenhouse With Wood Wall 8ft8"x18ft x 10ft

Dimensions:

Specs:

  • 🌳 Area: 163 sq. ft.
  • 🌳 Glass Option: Uses toughened safety glass that is 700% tougher than regular horticulture glass.
  • 🌳 5 Roof windows with Automatic Window Openers (opens automatically at 71°, no power needed)
  • 🌳 4 louvered window With Manual Openers
  • 🌳 One set of single Hinged door (Lockable Door with Keys)
  • 🌳 Comes with Slatted Shelves: 1 two slatt shelves (12" wide) and one 4 slatt shelves (20" wide) along one long side of the greenhouse.(top and bottom)
  • 🌳 Victorian Ridge Cresting
  • 🌳 Aluminum Bar Metal Capping
  • 🌳 Tall design – 10 ft for peak height The extra height gives you a better atmosphere for your plants and more headroom for your plants—and for you!
  • 🌳 Free 10 Year Guarantee
  • 🌳 Roof Pitch: 45 degrees

4th Size: Alton Cheltenham Cedar Greenhouse With Wood Wall 8ft8"x20ft10" x 10ft

Dimensions:

Specs:

  • 🌳 Area: 181 sq. ft.
  • 🌳 Glass Option: Uses toughened safety glass that is 700% tougher than regular horticulture glass.
  • 🌳 6 Roof windows with Automatic Window Openers (opens automatically at 71°, no power needed)
  • 🌳 4 louvered window With Manual Openers
  • 🌳 One set of single Hinged door (Lockable Door with Keys)
  • 🌳 Comes with Slatted Shelves: 1 two slatt shelves (12" wide) and one 4 slatt shelves (20" wide) along one long side of the greenhouse.(top and bottom)
  • 🌳 Victorian Ridge Cresting
  • 🌳 Aluminum Bar Metal Capping
  • 🌳 Tall design – 10 ft for peak height –The extra height gives you a better atmosphere for your plants and more headroom for your plants—and for you!
  • 🌳 Free 10 Year Guarantee
  • 🌳 Roof Pitch: 45 degrees

Important Shipping & Delivery Information

  • 🌿Curbside Delivery
  • 🌿Delivery is done through LTL Motor Freight and is free, unless you live in an area with limited access (i.e. island etc...this is extremely rare) this might incurr extra fees.
  • 🌿We ship using an 18 wheeler (let us know if there are tight roads or low hanging wires, manufacturer cannot guarantee the availability of a smaller truck)
  • 🌿 Someone will need to be available to receive the greenhouse. We will call to set up a delivery timeframe. Driver might need help although he will do most of the work.
  • Current lead time: if item is in stock then 1 to 2 weeks to process and package then 5 to 7 business days for delivery. If item is not in stock, this will be considered a special order and might take between 12 to 14 weeks. Contact us and we will let you know about current lead time.

Technical Documents

Shipping & Delivery

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  • 🌿Curbside Delivery
  • 🌿Delivery is done through LTL Motor Freight and is free, unless you live in an area with limited access (i.e. island etc...this is extremely rare) this might incurr extra fees.
  • 🌿We ship using an 18 wheeler (let us know if there are tight roads or low hanging wires, manufacturer cannot guarantee the availability of a smaller truck)
  • 🌿 Someone will need to be available to receive the greenhouse. We will call to set up a delivery timeframe. Driver might need help although he will do most of the work.

Video and Picture Gallery

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  • 108 sq ft (8x12), 144.9 sq ft (8x16), 163 sq ft (8x18) or 181 sq ft (8x20) Floor area
  • 8' 8" W x 12' 7", 16' 9", 18' or 20' 10" L x 10' H Exterior size
  • Grade 1 Western Red Cedar, knot-free, dipped and sealed Frame
  • 3 mm toughened safety glass, large single panes Glazing
  • 4 (8x12 and 8x16), 5 (8x18) or 6 (8x20), automatic openers at 71 degrees Roof windows
  • 10-year framework guarantee (moving parts 12 months) Warranty

Exaco · Hobby Greenhouse

Overview

The Cheltenham pairs a solid cedar lower wall with tall glass for a classic Victorian look. It shares its construction with the Alton Evolution range: thick glazing bars cut from 44 x 44 mm timbers, and 44 x 69 mm in places, with the common rot points designed out.

All the wood is Grade 1 Western Red Cedar from Canada, knot-free, dipped and sealed. Mortise-and-tenon and tongue-and-groove joints, stainless steel hardware and knee brace spandrels at every rafter keep the frame strong, while aluminum capping and an aluminum base frame protect the timber from water and ground moisture.

The 10 ft ridge gives your plants a better atmosphere and gives you room to stand tall. Roof windows open on their own at 71 degrees with no power, louvered side windows add airflow, and shelving, gutters and downpipes come standard.

Our tip: Keep the cedar treated and the greenhouse is expected to last 30 to 40 years.

Alton Cheltenham cedar Greenhouse – photo 4 of 14

Why customers choose it

Classic cedar, built to last

Alton Cheltenham cedar Greenhouse – photo 2 of 14

Knot-free Western Red Cedar

Grade 1 Canadian cedar is dipped and sealed, with thick glazing bars and the common rot points designed out.

Alton Cheltenham cedar Greenhouse – photo 3 of 14

Hands-free ventilation

Roof windows open automatically at 71 degrees with no power, and louvered side windows open by hand.

Alton Cheltenham cedar Greenhouse – photo 11 of 14

Room to stand and grow

A 10 ft ridge and 45 degree roof pitch give plants a better atmosphere and give you real headroom.

Alton cedar greenhouse – product photo 6

Large toughened glass panes

Single sheets of 3 mm toughened safety glass look neater, clean up faster and are safer than small overlapping panes.

Alton cedar greenhouse – product photo 4

Ready to use

Slatted shelving runs along one long side, and gutters and downpipes on both sides come standard.

Alton cedar greenhouse – product photo 3

Protected from the ground up

An aluminum base frame keeps the cedar off the ground, and aluminum capping sheds rain.

Plan your space

Size drawings

8' x 12'6" dimension drawing, side and end views
8' x 12'6": side and end views with exterior dimensions. Tap the drawing to open it full size.
8' x 16'8" dimension drawing, side and end views
8' x 16'8": side and end views with exterior dimensions. Tap the drawing to open it full size.
8' x 18' dimension drawing, side and end views
8' x 18': side and end views with exterior dimensions. Tap the drawing to open it full size.
8' x 20'10" dimension drawing, side and end views
8' x 20'10": side and end views with exterior dimensions. Tap the drawing to open it full size.

The details

Specifications

Size

Floor area 108 sq ft (8x12), 144.9 sq ft (8x16), 163 sq ft (8x18) or 181 sq ft (8x20)
Exterior size 8' 8" W x 12' 7", 16' 9", 18' or 20' 10" L x 10' H
Walking height 5' 7" at the sides, 10' at the ridge
Roof pitch 45 degrees
8' x 12'6" dimension drawing

8' x 12'6"

Size
Exterior size 8' 8" W x 12' 7" L
Floor area 108 sq ft
Ridge height 10'
Side wall height 5' 7"
Roof pitch 45°
Doors and ventilation
Door Single hinged door with lock
Roof windows 4, automatic openers at 71°
Louvered windows 2, manual openers
Included
Shelving Slatted shelves included (one 2-slat and one 4-slat) along one long side
Trim Victorian ridge cresting, aluminum bar capping
Availability
Lead time In-stock units ship in 1 to 2 weeks; special orders take about 12 to 14 weeks
8' x 16'8" dimension drawing

8' x 16'8"

Size
Exterior size 8' 8" W x 16' 9" L
Floor area 144.9 sq ft
Ridge height 10'
Side wall height 5' 7"
Roof pitch 45°
Doors and ventilation
Door Single hinged door with lock
Roof windows 4, automatic openers at 71°
Louvered windows 3, manual openers
Included
Shelving Slatted shelves included (one 2-slat and one 4-slat) along one long side
Trim Victorian ridge cresting, aluminum bar capping
Availability
Lead time In-stock units ship in 1 to 2 weeks; special orders take about 12 to 14 weeks
8' x 18' dimension drawing

8' x 18'

Size
Exterior size 8' 8" W x 18' L
Floor area 163 sq ft
Ridge height 10'
Side wall height 5' 7"
Roof pitch 45°
Doors and ventilation
Door Single hinged door with lock
Roof windows 5, automatic openers at 71°
Louvered windows 4, manual openers
Included
Shelving Slatted shelves included (one 2-slat and one 4-slat) along one long side
Trim Victorian ridge cresting, aluminum bar capping
Availability
Lead time In-stock units ship in 1 to 2 weeks; special orders take about 12 to 14 weeks
8' x 20'10" dimension drawing

8' x 20'10"

Size
Exterior size 8' 8" W x 20' 10" L
Floor area 181 sq ft
Ridge height 10'
Side wall height 5' 7"
Roof pitch 45°
Doors and ventilation
Door Single hinged door with lock
Roof windows 6, automatic openers at 71°
Louvered windows 4, manual openers
Included
Shelving Slatted shelves included (one 2-slat and one 4-slat) along one long side
Trim Victorian ridge cresting, aluminum bar capping
Availability
Lead time In-stock units ship in 1 to 2 weeks; special orders take about 12 to 14 weeks

Structure

Frame Grade 1 Western Red Cedar, knot-free, dipped and sealed
Glazing bars 44 x 44 mm timbers, 44 x 69 mm in places
Glazing 3 mm toughened safety glass, large single panes
Walls Cedar wood lower walls
Joinery Mortise-and-tenon and tongue-and-groove, stainless steel hardware
Base Aluminum base frame
Gutters Gutters and downpipes on both sides
Made in UK

Doors and ventilation

Door 2' 5" W x 6' 7" H single hinged door, lockable with keys
Roof windows 4 (8x12 and 8x16), 5 (8x18) or 6 (8x20), automatic openers at 71 degrees
Louvered windows 2 (8x12), 3 (8x16) or 4 (8x18 and 8x20), manual openers

Assembly and warranty

Lead time In-stock units ship in 1 to 2 weeks plus 5 to 7 business days for delivery; special orders take about 12 to 14 weeks. Contact us for the current lead time
Warranty 10-year framework guarantee (moving parts 12 months)

Plan, build and permit

Technical documents

Every manual, drawing and certificate is hosted on our own servers, so the links always work. Open on any device or save a copy for your builder or permit office.

Free curbside freight delivery

How delivery works

  1. 1

    You place your order

    Choose your size, color and options. Your greenhouse ships from the manufacturer's warehouse, packed for freight.

  2. 2

    We call to schedule

    We'll contact you to set up a delivery time frame that works for you.

  3. 3

    Free curbside freight

    Delivery is by LTL motor freight on an 18-wheeler. Let us know about tight roads or low wires so we can plan ahead.

  4. 4

    Receive and unload

    Someone needs to be there to receive the delivery. The driver does most of the work but may need a hand.

Foundations and bases are bulky, so we recommend ordering them together with your greenhouse to avoid a separate freight charge.

Good to know

Frequently asked questions

Can't find your answer? Our greenhouse specialists are happy to help you choose.

678-408-8222 Email us
What sizes does the Cheltenham come in?
There are four sizes, all 8' 8" wide with a 10 ft ridge: about 8x12 (108 sq ft), 8x16 (144.9 sq ft), 8x18 (163 sq ft) and 8x20 (181 sq ft). Choose the size in the options above.
Do the roof windows need power to open?
No. Every roof window has an automatic opener that opens at 71 degrees with no power needed. The louvered side windows open by hand.
How tall is it inside?
The side walls are 5' 7" high and the ridge reaches 10 ft, with a 45 degree roof pitch. The door opening is 2' 5" wide and 6' 7" high.
What comes with it?
Every size includes slatted shelving along one long side (a 12" two-slat shelf and a 20" four-slat shelf, top and bottom), gutters and downpipes on both sides, Victorian ridge cresting, aluminum bar capping and a lockable hinged door with keys.
How long will the cedar last?
It is built from Grade 1, knot-free Western Red Cedar from Canada that is dipped and sealed, sitting on an aluminum base frame that keeps the wood off the ground. Treated regularly, it is expected to last 30 to 40 years.
What warranty does the Cheltenham have?
Alton gives every Cheltenham a free 10-year framework guarantee. It covers the cedar frame against faulty manufacture, and against rot as long as you clean the greenhouse once a year. Moving parts are guaranteed for 12 months. Glazing, wind damage, labor and accidental damage are not covered.
Is shipping really free?

Yes. Shipping is free. Locations with limited access, such as islands, are rare exceptions that may carry an extra fee, and we'll tell you before anything ships.

Do you offer a price match?

Yes. If you find the same greenhouse for less from an authorized dealer, call or email us with the offer and we'll review it.

Are you an authorized retailer?

Yes. Mulberry Greenhouses is an authorized retailer, so your greenhouse is covered by the full manufacturer warranty.