Alton Westminster Cedar Greenhouse - Wide & Tall

Where can I buy the Alton Westminster?

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.

Westminster or Lancing?

Same size and shape — the Westminster has half-height cedar walls below the glass for a classic look and extra insulation at bench level, while the Lancing is glass to the ground for maximum light.

How much room is inside?

Up to 224 sq. ft. with an 11'1" peak — enough for benches on both sides and a center aisle.

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.