Gazebo or pavilion
Usually a freestanding outdoor structure with a more complete fixed roof; visual similarity does not establish the same regulatory class.
Evidence-led knowledge base
What is a pergola?
A pergola is an outdoor framework of posts and overhead members. Whether it is legally open, roofed, attached or habitable depends on its actual construction and local rules.
Concise physical definition
A pergola is an outdoor framework of posts or other supports and overhead members, traditionally using an open lattice for partial shade. Modern products also use the name for adjustable-louver, fixed solid-roof and attached systems, but those constructions create different load, drainage, enclosure and approval questions.
Invariant: the name is not an approval classification or proof of performance.
Classify by actual construction
| Actual construction | Performance consequence | Verify locally or for the project |
|---|---|---|
| Open rafters or lattice | Primarily partial shade; normally no continuous rain-excluding plane. | Open area, size, location, foundations, attachment and any local exemption conditions. |
| Adjustable or closing louvers | Closed-state wind and rain actions, drainage paths and control fail-state differ from an open lattice. | Declared test configuration, load path, drainage capacity, electrical controls and regulatory classification. |
| Fixed solid roof | Creates a continuous catchment and may change wind, snow, drainage, floor-area or fire considerations. | Approval path, roof material, slope, rainwater system, structural design and building interfaces. |
| Attached, enclosed or permanently serviced | Connects the outdoor frame to the main building, enclosure or fixed electrical or gas services. | Supporting-structure capacity, weatherproofing, fire, ventilation, energy, accessibility and licensed-work requirements. |
Boundaries with related terms
Patio cover
Usually emphasizes a roof covering a patio and is often attached to a dwelling; jurisdictions may define it separately.
Branded “bioclimatic” systems
A product or marketing description, not a substitute for actual construction, test scope, climate suitability or approval classification.
Apply the definition to a real project
- Record whether the overhead plane is open, closable or continuously solid in every operating state.
- Record whether it is freestanding, attached, enclosed or connected to fixed electrical, gas or drainage services.
- Obtain project evidence for dimensions, location, actions, foundations, connections, drainage and product test scope.
- Confirm current adopted rules, local amendments and required approvals with the local authority; do not transfer another jurisdiction's exemption.
Compare pergola types · Open the engineering framework · Choose a local approval pathway · Check the source register