Gazebo vs pergola

Part of the The pergola design guide

In a gazebo vs pergola comparison the textbook answer is the roof: a gazebo has a fixed one that keeps rain off, a pergola has an open one that does not. That answer was correct for roughly two thousand years and then stopped being correct about fifteen years ago, when somebody worked out how to make the roof move. Nobody has updated the textbook. Here is what actually separates them, and the bit that decides whether you need planning permission.

The short answer

A gazebo is a garden building with a solid roof, usually pitched, usually free-standing, and usually looking like it is waiting for someone to propose underneath it. A pergola is a frame with an open roof, traditionally beams and rafters, often attached to the house, designed to filter light rather than block it.

The difference is the roof. Everything else, the shape, the posts, the decking, the furniture nobody puts away, is interchangeable.

That distinction holds right up until the roof starts moving, which is where most of the advice online quietly stops.

What a pergola actually is

A pergola is a horizontal frame on posts with an open top. Beams across, rafters over them, gaps between. Sunlight comes through in stripes, rain comes through in rain.

The traditional job is to grow something over it. The RHS is enthusiastic about wisteria for exactly this reason, because a wisteria hanging its flowers down through a frame is one of the genuinely great sights in a British garden, and takes only about seven years of your life to achieve.

The modern aluminium version keeps the geometry and drops the gardening. Our Titan range runs a slim 80mm profile across fourteen free-standing sizes and three wall-mounted options, which is a polite way of saying the posts are thin enough that you stop noticing them by the second week.

A pergola is also, almost always, the cheaper structure. Fewer materials, simpler joints, no roof to weatherproof. You are buying a frame and some air.

What a gazebo actually is

A gazebo is a roofed garden building, freestanding, open-sided, traditionally octagonal because the Victorians could not leave a shape alone. The roof is solid and pitched, which means it sheds rain properly and casts a real shadow underneath.

That solid roof is the entire proposition. You can sit under a gazebo in a downpour and stay dry, which in this country is not a niche requirement.

The trade-off is light. A solid roof that keeps the rain out also keeps the sun out, permanently, in February as well as July. A gazebo gives you one condition and offers it year round whether you asked for it or not, which is either reassuring or oppressive depending on the month.

The pop-up problem, which nobody mentions

Here is the thing that makes this comparison harder than it should be. In Britain, the word gazebo mostly means a pop-up. A 3m by 3m frame of poles and polyester starting around £49, put up for a birthday, blown into a hedge by September.

So a reader comparing a gazebo against a pergola is often comparing a permanent garden building against a party tent, using the same word for both, and getting prices that differ by a factor of sixty. The search results cheerfully mix the two and nobody separates them.

If you are weighing up a £49 pop-up, this article is not for you and neither are we. Buy the pop-up. It is the correct answer for four Saturdays a year and it folds into a bag, which is more than can be said for anything we sell.

The rest of this assumes you mean something that stays up.

Where the rule falls apart

Every guide on this subject says the same thing: pergola open, gazebo covered. The best of them hedge slightly and say a pergola has an "open or opening" roof, and then move straight on without noticing they have just demolished their own category.

Because if the roof opens, it also closes.

A louvred roof is made of aluminium blades that rotate. Open, they let light and air through and you can see the sky between them, which is a pergola. Closed, they overlap into a sealed surface that sheds rain down an integrated gutter, which is a gazebo. Same structure, twenty seconds apart, and it will do it while you are still deciding whether the weather has turned.

This is the part of the argument the industry keeps not making, presumably because the neat two-column comparison is easier to sell than the truth. The honest version is that the categories are marketing, not engineering. What matters is whether the roof moves, and once it does, asking whether you own a pergola or a gazebo is like asking whether a convertible is a car or a cabriolet. It is both, and only one of those facts is useful when it rains.

The same logic runs through adding sides to a pergola, where the structure quietly becomes a room without ever changing its name.

That one has a solid roof and still gets called a pergola by everybody who sells it, which tells you how much work the word is no longer doing.

Side by side

Those price bands are what the market charges, not what we charge. Ours depend on span and specification and come from a survey, because quoting a pergola without seeing the ground it stands on is how you end up revising the number later.

What planning permission actually cares about

Almost nobody writing about this mentions planning at all, which is a strange omission given it is the one part that can stop the project.

Under permitted development in England, the Planning Portal sets a maximum height of 2.5m for any building within two metres of a boundary. Away from the boundary you get more room, and here is the detail worth knowing: four metres if the roof is dual-pitched, three metres for any other roof shape.

Read that again, because it is the one place the gazebo wins on paper. A traditional pitched gazebo roof is allowed a full metre more height than a flat-roofed pergola in the same spot. Permitted development does not care whether your roof is open or solid. It cares whether it is pointy.

There is also a rule that buildings must not cover more than half the land around the original house, which catches people who already have a shed, a summerhouse and ambitions.

None of that is the full picture, and conservation areas and listed buildings change it entirely. We have written the detailed version of the rules separately.

What actually moves the price

Every guide quotes a range and none of them says what drives it. Three things do.

Span. The distance between posts is the single biggest cost lever, because a longer span needs a deeper beam and more aluminium. A pergola is priced by the metre of unsupported roof, not by the square metre of garden.

Post count. Fewer posts costs more, not less, which surprises people who assume they are paying per leg. You are paying to remove them.

Whether the roof moves. A fixed roof is a sheet. A louvred roof is a set of rotating blades, bearings, a motor and a gutter, and it costs accordingly. The market range of £2,000 to £5,000 for a louvre roof against £100 to £3,000 for a static pergola is almost entirely that mechanism.

Which one suits your garden

Choose a gazebo if you want a destination at the far end of the lawn, you like the look of a pitched roof, and you are content for the space underneath to be shaded permanently.

Choose a fixed pergola if you want to grow something over it, you are shading a spot that already gets too much sun, and you accept that rain will find you.

Choose a louvred pergola if you want to use the space more than a dozen times a year. That is not a sales line, it is the practical difference: a fixed roof commits you to one condition and a moving one does not.

Ours go up against the house or free-standing, in eleven colours across the Morvelle range, which carries a ten year structural guarantee and typically runs three to six weeks from order to installation. Most single-bay builds are finished in a day. We cover Kent, Greater London and East Sussex, and the survey is free, largely because guessing at ground conditions from a photograph is how installers acquire their reputations.

Frequently asked questions

What is the difference between a gazebo and a pergola?

A gazebo has a solid, usually pitched roof and keeps rain off the space beneath it. A pergola has an open roof of beams and rafters that filters light and lets rain through. Both are open-sided structures on posts, so the roof is the only reliable difference between them.

Is a louvred pergola a gazebo?

By construction it is a pergola, because it is a frame on posts with a roof made of separate blades. By behaviour it is both, because those blades rotate closed into a sealed surface that sheds rain, then open again. It is the clearest case of the traditional categories no longer describing what is actually on sale.

Do you need planning permission for a gazebo or a pergola?

Usually not, under permitted development, but the limits are specific. Maximum 2.5m high within two metres of a boundary. Away from a boundary, four metres for a dual-pitched roof or three metres for any other roof. Buildings must not cover more than half the land around the original house. Conservation areas and listed buildings are assessed separately.

Which is cheaper, a gazebo or a pergola?

A fixed pergola is normally the cheaper structure, because it uses less material and has no roof to weatherproof. Market figures put pergolas at roughly £100 to £3,000 and gazebos at £100 to £5,000. A louvred roof sits above both at around £2,000 to £5,000, because you are buying a mechanism rather than a sheet.

Which is better in British weather?

A solid roof keeps rain off and a static open roof does not, so on rain alone the gazebo wins. The complication is that a solid roof also blocks the sun in the months you want it, and a louvred roof does both jobs on demand. If the space is meant to be used across the year rather than in one season, the moving roof is the practical answer.

Can you put a solid roof on a pergola?

Yes, and it is common. A glass or insulated panel roof turns a pergola into a veranda, which sheds rain and keeps the light. At that point the structure is no longer doing what a pergola was invented to do, which is why the naming gets confused and why the category is less useful than the specification.

Do gazebos and pergolas add value to a house?

There is no reliable UK figure separating the two, and any specific percentage you see quoted should be treated with suspicion until someone shows the data behind it. What can be said is that a permanent, properly founded structure is treated differently by buyers and surveyors than a temporary one, which is a point about permanence rather than about which word you use for it.

Gazebo photograph by MMc Photography on Pexels. Pergola and veranda photographs supplied by Deponti.