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ESTABLISHED SINCE 2000
ESTABLISHED SINCE 2000
uk manufactured
uk manufactured

BillyOh Harvester Walk-In Aluminium Polycarbonate Greenhouse

£818.00 £0.00

BillyOh Harvester Walk-In Aluminium Polycarbonate Greenhouse

£818.00 £0.00

A large metal greenhouse built for serious growing, the BillyOh Harvester gives you a generous 8x12 footprint, sliding double doors and a crouch-free interior you can walk straight into. Its rust-free aluminium frame and shatterproof twin-wall polycarbonate spread light and warmth evenly across your plants, while two opening roof vents make it easy to keep growing conditions just right — all on an included galvanised steel floor frame for a solid, straightforward build.

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Shelving
Design insights
  • Spacious 8x12ft walk-in footprint
  • Space-saving central sliding double doors
  • Rust-free green-finished aluminium frame
  • Shatterproof twin-wall polycarbonate glazing
  • Two adjustable roof vents for airflow
  • Galvanised steel floor frame holds the structure firm
  • Tall, crouch-free interior
Optional Extras: £0.00

Total Price:
£818.00 £0.00
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Finance Calculation for your £818.00 order
Deposit Amount of 10% = £81.80
I would like to pay over 24 months
Total Cash Price £818.00
Total Amount of Credit £736.20
Deposit £81.80
Interest Rate 14.9% p.a.fixed
Total Amount Payable £929.86
Total Charge fo Credit £111.86
APR representative 14.9%
Monthly Repayment( 24 months ) £35.34

Why buy the Harvester Greenhouse?

Waterproof Base Included
Waterproof Base Included

Ready to install on a flat and level area.

Polycarbonate Glazing
Polycarbonate Glazing

Double-skinned windows provide superior insulation.

Tall, Walk-in Greenhouse
Tall, Walk-in Greenhouse

Just over 7 feet total ceiling height

Ventilated Greenhouse
Ventilated Greenhouse

Easy-open roof vents prevent overheating and condensation

Key Features

Slim aluminium glazing bars

Narrow aluminium bars hold large window panels with very little shading, so more daylight reaches your plants.

Twin sliding doors

Easily access your greenhouse with a glide-open entryway that doesn't swing out into the garden.

Staging-ready interior

Room to set staging down both sides with a clear central path, so you can sow, pot up and harvest a full crop without stepping back outside.

key features
Classic green finish

A traditional green finish over the aluminium gives the Harvester its classic greenhouse look that fits perfectly in gardens with greenery.

Fully polycarbonate

Polycarbonate is the superior glazing for heat retention and shatterproof safety, and it's on all sides and the roof.to provide full coverage.

Complete building kit

Every Harvester arrives with its glazing, framing, base, fixings and step-by-step instructions in one delivery, so everything you need to put it up is in the box.

FAQs

No. Unlike a timber greenhouse, the aluminium frame won't rot or rust and never needs a protective coat. Maintenance is really just keeping the glazing clean and the vents and door runners clear.
The twin-wall sheet has two layers with an air gap between them. That diffuses bright sun so it won't scorch tender plants, and holds heat in better than single-skin glass, which provides better insulation. It also flexes rather than shattering, so it's safer (and lower cost) than glass if you have children, pets or footballs about.
The stainless steel base is a frame that fits at the bottom of the greenhouse. It has anchor pegs which can fit straight down into soft ground, or you can lay it onto patio slabs or gravel. Whatever you use as your under-surface (preferably something drainable), it needs to be level and not shifting.
The aluminium frame and steel base make a rigid, bolted structure. As with any greenhouse, anchor the base to firm, level ground (paving or a prepared pad), keep the vents closed in high winds, and it'll stand up to typical British weather.
For most gardens, no. A greenhouse like the Harvester normally falls under permitted development as an outbuilding — its ridge sits just over 7ft, well under the 2.5m eaves limit that matters near a boundary. It needs to be positioned to the rear of the house and not cover more than half your outdoor space (including other buildings). Listed buildings and conservation areas have tighter rules, so check locally if unsure.
Yes. The twin-wall polycarbonate's insulating air gap helps hold daytime warmth into the evening, sheltering tender plants from frost, while the roof vents let you cool things down in summer — so it earns its keep year-round.
Most customers have the Harvester up over a day or a weekend, working from the numbered instructions. Having your base area ready in advance helps make the project smoother.

The BillyOh Harvester: A Large 8x12 Metal Greenhouse Built to Last

If you want a large metal greenhouse with the room to grow properly, the 8x12 BillyOh Harvester delivers. It pairs a classic green-framed look with genuinely practical growing space, so it earns its place in the garden on both style and function. Like the rest of our metal greenhouse range, the Harvester is designed to shrug off the British weather and keep your plants protected year-round — a good-looking, hard-working greenhouse at a price that makes sense.

Whether you’re raising tropical plants, hardening off seedlings or filling it with summer colour, the Harvester’s insulation and weather protection give you the stable conditions to grow almost anything. Here’s what sets it apart.

Rust-Free Aluminium Frame

The Harvester is built around a strong aluminium frame finished in a traditional green coating — the classic greenhouse look without the upkeep of painted timber. Aluminium is naturally weather- and rust-resistant, so the structure stays sound through wind and rain while keeping your plants safe inside. The frame is also designed with extra head height for a crouch-free interior, so there’s no stooping as you move in and out.

Twin-Wall Polycarbonate Glazing

In place of fragile horticultural glass, the Harvester uses double-layered polycarbonate. It’s shatterproof and engineered to diffuse natural light evenly across your plants while shielding them from harsh, direct heat, and the panoramic roof panels keep daylight coming in through every season. Polycarbonate is both cheaper, safer, and better insulating than glass — a better all-round choice for a working garden greenhouse.

Galvanised Steel Base Included

Every greenhouse in our metal range ships with a heavy-duty galvanised steel frame around its perimeter, and the Harvester is no exception. It resists rust and water to keep the whole structure stronger for longer — real value built into the foundation rather than sold as an extra. It does need to be assembled on a flat, level surface.

Sliding Doors, Roof Vents & Guttering

The Harvester’s sliding polycarbonate double doors are a clever space-saver: there’s no door swing to leave clear, so you keep more usable garden around the building while still getting easy walk-in access to your plants and benches. Two adjustable roof vents prop open for simple airflow and circulation on warm days, and integrated metal guttering handles drainage from day one — with a low, easy-to-reach overhang that makes cleaning the gutter painless.

The Right Size for Most Gardens

At 8x12 feet, the Harvester strikes a useful balance — plenty of room for plants plus a comfortable walkway, without dominating the plot. It stands just over 7ft tall, giving generous indoor headroom while keeping a low enough profile to sit under the standard permitted-development height limits (exceptions apply to some properties, so it’s worth checking before you build). If the 8x12 is more than you need, we also offer smaller metal greenhouses and compact lean-to options.

Quick to Install, Free to Deliver

The Harvester is designed for quick, straightforward installation once it arrives. If you hit a snag, our customer support team is on hand — reach us through the website or on 01909 768840 — and our blog is full of greenhouse guides, from organising your space to the best plants to grow under cover. Delivery is free to most of mainland UK: enter your postcode at checkout to confirm, and finance options are available if you’d prefer to spread the cost.

Show Show measurements as:
Dimensions
Base Depth 366cm 12'
Base Width 248cm 8'2"
Door Width 171cm 5'7"
Door Height 120cm 3'11"
Depth (Internal) 361cm 11'10"
Width (Internal) 243cm 8'
Height 226cm 7'5"
Width 248cm 8'2"
Depth 366cm 12'
Eaves Height (Inc Floor) 152cm 5'
Ridge Height (Inc Floor) 226cm 7'5"
Door Opening Size (w x h) 120cm x 171cm 3'11" x 5'7"
Features
Colour Green Green
Material Polycarbonate Polycarbonate
Roof Style Apex Apex
Greenhouse Style Apex Greenhouse Apex Greenhouse
Door Style Single Door Single Door
Please Note: All products supplied self assembly flat packed unless otherwise stated.

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£818 £0