How much does a greenhouse cost in the UK?

Start with an installed, growing-ready figure

“How much does a greenhouse cost?” has no useful single answer without a site and a growing plan. The same kit can be placed on an existing sound paved area or require excavation, a new foundation and paid assembly. A better comparison is the amount needed to get each option safely installed and ready for the first crop.

Make a separate line for the greenhouse structure, foundation, assembly and initial equipment. Do not use a temporary sale price as the centre of a long-term guide: take current figures directly from the retailer and local tradespeople when you are ready to buy. The checklist below is designed to stay useful when those figures change.

The six parts of a greenhouse budget

1. Structure and selected options

Record the exact model, glazing version, colour and door arrangement. A horticultural-glass listing with optional toughened glazing is not equivalent to a model supplied with toughened glass. Ask whether the perimeter base, gutters, opening vents, shelving and door lock are standard, optional or unavailable. Our included-components guide gives a comparison method.

The Forest mini growhouse, for example, has shelves, double doors and opening lids, but is not a walk-in. The Palram Hybrid 6 × 4 includes a steel perimeter base, but still needs level supporting ground and anchoring. The Halls Blockley 8 × 10 includes an integral base and more ventilation, yet its much larger glass structure changes delivery, foundation and assembly planning. These are different projects, not just three prices on one scale.

2. Foundation, drainage and site work

Measure the manufacturer's base dimensions, then decide what foundation is suitable for your ground and anchoring instructions. Include any removal of turf or an old base, aggregate, paving or concrete, labour and drainage. A perimeter base is a frame component; it is not automatically a finished floor or a substitute for sound groundworks. Our base guide helps compare options.

An uneven or wet site can cost more to prepare than expected. Mark the route for wheelbarrows and glazing, and allow room to maintain the outside. If a wall greenhouse is involved, assess the wall, fixings, rainwater details and any obstruction before accepting a low installation estimate.

3. Delivery and assembly

Check the delivered cost to your own postcode, not an assumed national rate. Some long panels or large glass panes require a clear unloading space and safe storage before assembly. If paying an installer, get the quote to specify whether it includes the foundation, assembly, anchoring, glazing, disposal of packaging and a return visit for missing parts.

Self-assembly still has costs: appropriate fixings, protective equipment, help from another adult and enough time in calm weather. Do not cut corners on anchoring to protect the initial budget; a poorly secured greenhouse can be expensive and dangerous later.

4. Climate control and water

An opening vent is not the same as a fully managed summer climate. Depending on site and crops, allow for a compatible automatic opener, shading, a max/min thermometer and perhaps water storage or simple irrigation. An unheated greenhouse may meet your plans without the purchase and running costs of a heater. If electrical equipment is needed, use a properly designed outdoor supply rather than an improvised lead.

5. The first growing season

Budget for trays, pots, suitable peat-free compost, supports, staging and seeds or plants. Buy for a realistic first season. A gardener growing tomatoes and salads may need a clear aisle, supports and watering equipment before adding a second bench; a seed-raising grower may value trays and a propagator more than full-height staging.

6. Maintenance and contingency

Leave room for replacement clips or panels, cleaning tools, seals and timber care where relevant. A contingency is particularly sensible when the base is not yet exposed or an old greenhouse must be removed. Note what that reserve covers rather than hiding every uncertain item in one vague figure.

Compare quotes on the same basis

Create one row per shortlisted structure and columns for delivered kit, selected glazing, base and site work, installation, anchoring and first-season equipment. Mark every unknown as “quote needed” rather than zero. This prevents a model with an optional base from seeming cheaper than one with an included base simply because a necessary item was omitted.

If your budget is fixed, reduce size or postpone optional equipment before weakening the foundation. A slightly smaller greenhouse with a safe base, functioning ventilation and usable path is a better working space than a larger kit you cannot finish properly. The size guide and 6 × 4 guide help test that trade-off.

The manufacturer's instructions are useful when checking which costs sit outside the kit. For example, the Canopia Hybrid documentation distinguishes the supplied structure from its foundation and suitable fixings. Use your chosen model's instructions to complete the quotation worksheet.