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Alton Cheltenham Cedar Greenhouse - Extra Tall
- Regular price $ 21,780.00
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- 2 available
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Description
Alton Cheltenham Cedar Greenhouse — Extra Tall, with a 10' Peak
The Cheltenham is the classic English cedar greenhouse: half cedar panels below, glass above, and clean, simple lines that fit any garden. Its steep roof reaches a 10' peak, giving tall plants room to grow and plenty of headroom for you.
It's our most popular Alton for growers who want the look of a traditional glasshouse with the warmth and insulation of real cedar.
Free Shipping · Financing Available · We Coordinate Your Installer · 10-Year Framework Warranty · Price Match
Four sizes from 109 to 181 sq. ft. (12'6", 16'8", 18' and 20'10" long), all 8'8" wide with 5'7" sidewalls, a 10' peak, 4 to 6 automatic roof vents and 3 to 4 louvre side windows. See the Sizes/Specs tab for every size.
Built to Last
- Grade-1 Western red cedar (no knots), dipped to resist water absorption — naturally rot-resistant and better insulating than an aluminum frame (cedar R-1.35).
- Traditional joinery — mortise-and-tenon and tongue-and-groove joints with solid aluminum gussets.
- Aluminum base lifts the cedar about 1" off the ground to prevent rot; aluminum bar capping seals the glass with no rattling.
- 3mm toughened safety glass in large panes with screw-in clamping, so a single pane can be replaced easily; the roof glass overhangs to keep water off the wood.
- Steep 45° roof helps snow slide off.
- Pre-assembled doors and windows, automatic roof vent openers (no electricity needed), and Victorian aluminum guttering with a downspout.
- Half-paneled cedar walls for privacy and extra insulation at bench level.
- Wide single door with lock and low threshold.
Accessories
Optional accessory kit with 2-slat and 4-slat staging and Victorian cresting — select it above, or call or text us for a customized package.
Alton Cedar Greenhouses Compared
| Model | Style | Size | Peak | Starting at |
|---|---|---|---|---|
| Octagonal | Octagonal with cupola, double doors | 9'2" x 12'10" (101 sq. ft.) | 9'8" | $17,325 |
| Fusion | Greenhouse + shed combo | 115–138 sq. ft. | 8' | $18,810 |
| Cheltenham (this model) | Classic, extra tall | 8'8" wide, 109–181 sq. ft. | 10' | $21,780 |
| Durham | T-shaped orangerie (smallest) | 7'5" wide, 12'5"–20'10" long | 8'10" | $25,740 |
| Cambridge | T-shaped orangerie (largest) | 123–194 sq. ft. | 10' | $27,225 |
| Lancing | Classic, glass to ground | 10'9" wide, 179–224 sq. ft. | 11'1" | $27,225 |
| Westminster | Classic, half cedar walls | 10'9" wide, 179–224 sq. ft. | 11'1" | $31,185 |
Talk to Us
An authorized Alton dealer. We're experts in greenhouses, sunrooms and garden rooms, and we've been selling Exaco's European greenhouses — and solutioning them for every type of install — for over 10 years. That means real advice on sizing, foundations and anchoring, installation and accessories, and our best price for your project. Please call or text us at 732-806-7959.
FAQ
Where can I buy the Alton Cheltenham?
From World of Greenhouses — an authorized Alton dealer with free shipping, financing and installer coordination. Call or text 732-806-7959 for current pricing and availability.
Can I add an extension, extra vents or a second door?
In Alton's range you can add extra automatic roof vents, louvre side vents, automatic louvre openers, a second door, internal shade blinds and hanging-basket brackets, and Victorian models offer an 8'3" extension section. Availability in the US varies — call or text us and we'll check with Exaco for your project.
Which size should I choose?
All sizes share the same 8'8" width and 10' peak; choose by length. The 18' and 20'10" add a fifth and sixth automatic roof vent for more airflow.
Who makes Alton greenhouses?
Alton is a British cedar greenhouse maker that has built greenhouses in the UK since 1921. Exaco imports them to the US, and World of Greenhouses is an authorized Alton dealer.
How strong is it in wind and snow?
Alton greenhouses don't carry a US wind rating or code certification. In a sandbag load test, an Alton greenhouse roof held about 900 kg (roughly 2,000 lb) of sandbags. The steep 45° roof sheds snow well. Exaco recommends them for backyards with some shelter from nearby homes, fences or trees rather than wide-open, very windy sites — tell us about your site and we'll help you decide.
What foundation does it need?
A level, square concrete slab or concrete piers/footings. Exaco ships US Alton greenhouses with anchors to embed in concrete — pavers alone, as shown in Alton's UK manuals, aren't enough for US weather. We'll help you plan the base and anchoring for your site.
Is it a kit? Can you install it?
It ships as a kit with pre-assembled doors and windows and a metal base. Plan on roughly 2–3 days for 2–3 handy people, or use an installer — we coordinate one for you.
How is it delivered?
Free freight shipping to most of the contiguous US. It ships directly from the US distributor by truck, so the site needs truck access and someone there to receive and unload the crates. Call or text us for current lead time.
How much maintenance does cedar need?
Very little. The cedar is factory-treated and weathers naturally to a silvery gray (or you can apply a colored wood preservative before assembly to keep the warm tone). Clean the glass and frame once a year, ideally in late winter. The aluminum bar capping is virtually maintenance-free.
What warranty does it have?
A 10-year guarantee on the cedar framework against rot.
Do I need a permit?
Often, since this is a permanent structure — requirements vary by town, so check with your local building department before you order.
What if I have more questions?
Call or text us at 732-806-7959 — texting is the fastest way to reach us. We're happy to help.
Features
- Classic greenhouse design with half wooden panels
- Tall design with 10' peak maximizes usable space
- Frame material: Western Red Cedar & Aluminum
- Western Red Cedar benefits: better insulation than aluminum, less temperature and humidity fluctuation for a more stable growing environment, naturally rot-resistant, absorbs moisture without warping and dries quickly, and has a long life with little maintenance
- Glass sits tightly in a wood frame (no rattling)
- Aluminum base frame keeps wood off the ground and reduces chances for early rot
- Aluminum caps on roof glass create a better seal for increased insulation and elongate the lifespan of the wood
- Lockable single hinged door with low threshold, and tall opening/eaves for superior headroom
- Roof vents come with automatic openers
- Louver windows come with manual openers
- Includes an aluminum gutter with UPVC downpipe
Sizes/Specs
Glazing: toughened safety glass with screw-in bar clamping (capping). Frame: extra strong cedar.
- 3mm glass: .95 R-Value
- Red Cedar: 1.35 R-Value
12'6" (109 sq. ft.)
- Length: 12'6", Width: 8'8"
- Peak Height: 10', Sidewall Height: 5'7"
- Roof Pitch: 45 degrees
- Doors: 1 lockable door with keys
- Windows: 4 roof vents, 2 louvre windows
- Window Openers: 4 automatic (roof), 2 manual (louvre)
16'8" (144.9 sq. ft.)
- Length: 16'8", Width: 8'8"
- Peak Height: 10', Sidewall Height: 5'7"
- Roof Pitch: 45 degrees
- Doors: 1 lockable door with keys
- Windows: 4 roof vents, 3 louvre windows
- Window Openers: 4 automatic (roof), 3 manual (louvre)
18' (163 sq. ft.)
- Length: 18', Width: 8'8"
- Peak Height: 10', Sidewall Height: 5'7"
- Roof Pitch: 45 degrees
- Doors: 1 lockable door with keys
- Windows: 5 roof vents, 4 louvre windows
- Window Openers: 5 automatic (roof), 4 manual (louvre)
20'10" (181 sq. ft.)
- Length: 20'10", Width: 8'8"
- Peak Height: 10', Sidewall Height: 5'7"
- Roof Pitch: 45 degrees
- Doors: 1 lockable door with keys
- Windows: 6 roof vents, 4 louvre windows
- Window Openers: 6 automatic (roof), 4 manual (louvre)
Financing Available: Get Started
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Alton Cheltenham Cedar Greenhouse - Extra Tall - 12'6" x 8'8" / No Acessory Kit
$ 21,780.00
Customer Reviews
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Fred Hearle F. H. Fred H. 21-06-2026
Question asked: I am applying for planning permission to install your 9x13 greenhouse. Can you provide a scaled and dimensioned drawing of the Victorian tall greenhouse. I just need the outside dimension drawing for the planners review. Thanks
I am applying for planning permission to install your 9x13 greenhouse. Can you provide a scaled and dimensioned drawing of the Victorian tall greenhouse. I just need the outside dimension drawing for the planners review. Thanks
Answers
21-06-2026
HI,Sure I can get you those documents, Can you tell me what your timing is ? I would need to make sure we reserve one for you.
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