Pergolas and Gazebos: Cost Guide

A basic timber pergola kit costs from around £500-£1,500 for DIY installation, while a bespoke, professionally built pergola typically runs £2,000-£6,000+ depending on size and materials. Gazebos cover an even wider range — from a simple pop-up frame under £200 to a substantial permanent structure costing several thousand pounds — since "gazebo" covers everything from a temporary garden party shelter to a permanent, roofed outdoor room.

Pergolas: what affects the cost

A pergola is an open-topped structure (posts and cross-beams, sometimes with slatted roofing) primarily used to support climbing plants or provide light dappled shade, rather than full weather protection. Material is the main cost driver: softwood timber is the most affordable, hardwood or cedar costs more but weathers better and needs less maintenance, and aluminium or steel-framed pergolas (increasingly popular, sometimes with retractable louvred roofs) sit at the premium end, often £3,000-£10,000+ for a quality installed system. Size and whether it's a simple freestanding structure versus one attached to the house (which needs proper structural fixing) also move the price.

Gazebos: what affects the cost

Gazebos generally provide more complete weather protection than pergolas, often with a solid or fabric roof rather than an open lattice. At the budget end, pop-up or basic framed gazebos (£100-£500) are portable and suit occasional use like garden parties, but aren't built for permanent outdoor exposure. Permanent timber or metal-framed gazebos with a proper roof, sometimes with screens or partial walls, typically cost £1,500-£5,000+ depending on size and specification, and can function as a genuine outdoor sitting or dining area protected from light rain.

Pergola or gazebo — which suits your garden?

A pergola suits gardens where the goal is light shade, a framework for climbing plants, or defining a seating area without fully enclosing it — it lets more light through and generally has a more open, garden-integrated look. A gazebo suits gardens where genuine weather protection matters more — somewhere to sit out even in light rain, or shelter for a hot tub or outdoor dining set. Some homeowners choose a pergola with a retractable canopy or louvred roof system as a middle ground, trading a higher cost for the flexibility of both open and covered use.

DIY or professional?

A basic timber pergola kit is a realistic DIY project for someone comfortable with basic construction and levelling posts correctly — most kits are designed for this. Anything attached to the house, larger bespoke structures, or aluminium/steel systems with electrics (lighting, heating) or motorised louvres are generally better installed professionally, both for structural safety and because manufacturer warranties often require professional installation.

Common mistakes

• Not checking planning permission for larger or roofed structures. A simple open pergola is usually fine under permitted development, but a more substantial roofed gazebo, especially one close to a boundary, can require checking — rules vary by council.
• Underestimating post foundation depth. A pergola or gazebo that isn't properly anchored can shift or lean over time, particularly in exposed, windy gardens.
• Choosing softwood without adequate treatment for a permanent structure — it will need re-treating far more often than cedar or properly treated timber, adding ongoing cost.

If you're planning a pergola or gazebo as part of a wider garden redesign, see our overview of garden landscaping costs, or our patio cost guide if you're pairing it with new paving for an outdoor seating area.

Adding lighting and heating

Many homeowners extend a pergola or gazebo's usability into the evening and cooler months with festoon or integrated LED lighting (relatively inexpensive, from £50-£200 for a decent festoon setup) and outdoor heating — freestanding gas or electric patio heaters are the simplest option, while wired-in electric heaters or infrared panels built into the structure look more integrated but need proper electrical installation, typically adding £300-£800 depending on the system chosen. If you're planning to add electrics at any point, it's far more cost-effective to run the cabling during the initial build than to retrofit it afterwards.

Planning for climbing plants

If the goal is a pergola covered in climbing plants (wisteria, roses, grape vines and clematis are popular UK choices), bear in mind that most take several years to establish full coverage, and some — wisteria in particular — become genuinely heavy and need a robustly built structure to support the mature plant's weight, not just its appearance when newly planted. It's worth discussing intended planting with whoever builds the pergola so the structure is specified with adequate strength from the outset, rather than needing reinforcement later once the plants are already established.

Whichever you choose, check the manufacturer or installer's stated wind rating if the structure will be in an exposed location — this matters more for gazebos with a solid roof, which catch far more wind load than an open pergola frame.