What size pergola do I need? A practical measuring guide.

Start with how you live

How to choose the right pergola size

A pergola should make your garden easier to enjoy. Before taking a tape measure outside, decide what you want beneath it: a dining table, a sofa and coffee table, a couple of loungers, or separate areas for eating and relaxing. Measure the furniture you actually own or plan to buy. Seat counts and product photographs are poor substitutes for real dimensions.

Next, think about everyday movement. Someone should be able to stand up from the table without meeting a post. A door needs room to open, and the route from the kitchen to the garden should still feel natural. If access needs vary within your household, plan the clear routes around those needs rather than using a generic seating diagram.

Start with one main use and get that right. In a smaller garden, a comfortable seating area can work better than an overcrowded dining-and-lounging arrangement. If you are still choosing the type of structure, our aluminium vs wooden pergola guide explains the difference between a louvred roof and an open garden frame.

Understand the sizes

Pergola sizes: nominal, actual and usable space

These three measurements answer different questions. Nominal size is the label used to browse a range. Actual outside dimensions describe the physical structure. Usable clear space is the room you have between posts, sides and other obstacles. Keep all three in your notes.

The roof edge, post positions and footplates need not sit on the same outline. A model’s technical drawings show the dimensions and fixing layout you need for preparation. Do not set foundations, drill a patio or order a close-fitting piece of furniture using only a rounded size label.

These are range size labels, not setting-out dimensions. Options and availability can change. Check the current product and its exact technical drawing before ordering.

3×3m or 3×4m?

A nominal 3×3m footprint is square, while 3×4m gives you an extra metre in one direction at the nominal-size level. That longer shape may work more naturally with a rectangular table or a linear sofa arrangement. It does not tell you how many people will sit comfortably: furniture depth, chair movement, posts and sides all affect the result.

Try both outlines on the ground. If you gain length, decide where it improves the layout. Extra space is most useful when it creates a clear route or gives chairs room to move, rather than simply adding a larger frame.

For larger gardens, begin with the zones you need, then compare Tora’s sizes. A long footprint may suit two connected uses, but check where posts and openings fall. The 8×4m Tora, for example, has separate bays rather than a single uninterrupted 8m opening. Use LuxSol’s model dimensions and planning drawings for the exact layout.

Prefer simple manual control? Explore our manual louvred pergolas. For powered roof adjustment, browse our electric pergolas.

Test your layout

How much room do your furniture and chairs need?

Lay out the furniture first, then test it as though you are using it. Pull the dining chairs back. Walk behind a seated person. Open a storage bench and move around the end of a sofa. Include side tables and any furniture that tends to arrive when you have guests.

Read the garden

Where should you position your pergola?

Measure the available space in more than one place. A patio that appears rectangular may narrow towards a boundary, and a wall may not run parallel to the paving. Record those differences on a simple sketch rather than treating the smallest measurement as an inconvenient exception.

Doors, windows and access

Open the doors fully and mark their swing or sliding clearance. Check windows, steps, paths, downpipes, outside taps and access to drains. Leave room to reach and maintain the house and the pergola. A freestanding LuxSol frame keeps its own posts; positioning it beside a wall does not turn it into a wall-mounted structure or allow a post to be removed.

Sunlight and views

Look at the location in the morning, at lunchtime and later in the day. Consider both the seating area and the light entering nearby rooms. Note the direction of the most exposed side and whether a screen would be useful there. Think about the view from indoors too: a post that interrupts your favourite outlook may be avoidable by adjusting the position.

Height and overhead space

Measure overhead obstacles such as eaves, guttering, branches and external fittings. Use the exact model drawing for installed height, roof movement and the clearances needed for fitting and operation. A nominal height is not enough where the space is tight.

Permission requirements depend on your location, property and proposed installation. Check them before committing to the position. Do not round an actual height down or assume that every pergola is exempt. If you need help identifying the dimensions to discuss, ask the LuxSol team for the relevant product information.

Below the surface

What should you check before preparing the base?

Once the location looks right, check what will support the pergola at its fixing positions. The visible paving surface does not tell the whole story. A patio, deck or recently landscaped area needs to be assessed against the base requirements for the chosen model and size.

Locate the footplates using the correct drawing and discuss the construction beneath them with your installer. Do not assume a paving slab or deck board is a suitable fixing by itself. Record slopes, changes in level, drainage routes and any concealed services that affect the work. LuxSol’s base guidance provides the model-specific starting point; the site still needs a proper assessment.

Think about installation access as well as the final footprint. There must be a practical route for delivery and space to assemble and position the components. If you are considering an electric model or powered accessories, plan the electrical supply with a suitable electrician. A socket near the patio does not, on its own, settle the installation requirements.

Think one step ahead

Allow for pergola screens and slatted walls

Accessories affect how you use the edges of the space. Decide which side you want to enter from, which view to keep open and where shade or privacy would help. A screen lowers within its frame, while a slatted wall stays in position. Allow for these features when placing furniture and choosing access routes.

Compatibility depends on the model, opening and accessory. A long side is not always one opening: Tora’s larger configurations need particular attention. The 8×4m layout has separate 4m bays, and 5m or 6m openings use the compatible electric-screen options. Avoid assuming an accessory named for a nominal length will fit any side of any pergola.

Use our screen and slatted-wall configuration guide before completing your specification. If you expect to add accessories later, ask about the exact model and fitting position now. A future option is more useful when its compatibility is understood before installation.

Once you have checked compatibility, explore our pergola screens and pergola slatted walls to complete your layout.

Ready for the next step

Your pergola measuring checklist

Bring a simple sketch, your measurements and a few photographs to a conversation with the team. You do not need a polished drawing. Clear notes about what is fixed, what can move and what you want from the space are more useful.

When you are ready, compare Aura, Como and Tora, or book a consultation to talk through the space. If you are choosing between frame materials as well as sizes, return to our aluminium vs wood pergola comparison.

Bring these decisions together with our guide to choosing an aluminium pergola, covering models, accessories and installation.