Statute Details
- Title: Building Control (Meaning of Exterior Features) Regulations 2021
- Act Code: BCA1989-S784-2021
- Legislation Type: Subsidiary legislation (regulations)
- Authorising Act: Building Control Act (Chapter 29)
- Enacting Power: Section 49(1) of the Building Control Act
- Citation: S 784/2021
- Commencement: 1 January 2022
- Status: Current version as at 26 March 2026
- Key Provisions (from extract): Regulation 1 (citation and commencement); Regulation 2 (what are “exterior features”)
What Is This Legislation About?
The Building Control (Meaning of Exterior Features) Regulations 2021 (“Exterior Features Regulations”) are subsidiary legislation made under the Building Control Act (the “Act”). In practical terms, the Regulations clarify which permanent elements of a building count as “exterior features” for the purposes of the Building Control Act.
Although the extract provided contains only Regulations 1 and 2, the legal significance is clear: the Act contains a definition of “exterior feature” in section 2(1), and the Regulations prescribe specific building components that are to be treated as exterior features. This matters because the Act’s regulatory regime for building works and building maintenance often turns on whether something is an exterior feature—particularly where approvals, compliance obligations, and enforcement consequences depend on that classification.
In plain language, the Regulations draw a detailed boundary around what parts of a building’s exterior are captured. They include not only obvious architectural elements such as windows, cladding, gutters and balustrades, but also functional and infrastructure-like components such as membrane shade structures, green walls (including their brackets and integrated water delivery systems), and externally mounted equipment support systems. The Regulations also include certain signage and advertising structures, but only where installed for more than 36 months.
What Are the Key Provisions?
Regulation 1: Citation and commencement. Regulation 1 provides that the Regulations may be cited as the Building Control (Meaning of Exterior Features) Regulations 2021 and that they come into operation on 1 January 2022. For practitioners, this is important for determining which version applies to events (for example, approvals sought, works carried out, or enforcement actions) occurring on or after commencement.
Regulation 2: What are “exterior features”. Regulation 2 is the core provision. It addresses the definition of “exterior feature” in section 2(1) of the Act—specifically, paragraph (b) of that definition. The Regulations then prescribe a list of permanent features of a building that are each to be treated as an exterior feature.
The list is extensive and can be grouped conceptually:
(a) Daylight and openings: windows (with or without movable parts), including roof skylights, glass panels, glass bricks, louvres, glazed sashes, glazed doors, translucent sheeting, and other materials that transmit natural light directly from outside into the interior. This is a broad capture of glazing and daylighting elements, including both fixed and operable components.
(b) Security and closure systems: grilles or shutters, again with or without movable parts.
(c) Building envelope finishes and components: tiles, cladding, curtain walls, siding, plaster, brackets, and cornices. These are typical façade and envelope elements that affect weathering, appearance, and structural attachment.
(d) Water management and roof elements: gutters, rainwater down-pipes, and parts of the roof. This is relevant to drainage performance and water ingress risk.
(e) Shading and canopy structures: membrane shade structures, awnings, and devices to provide shade.
(f) Green and vegetated façade systems: green walls partially or completely covered by vegetation, including brackets supporting the green wall, the growing medium (other than soil), and any integrated water delivery system. This is particularly useful for practitioners advising on façade landscaping systems, because it clarifies that the “exterior feature” is not only the visible vegetation layer but also the supporting and irrigation components.
(g) Screens and façade fins: screens or screen walls; louvres or fins; and masonry veneer.
(h) Roof projections and structural façade elements: window hoods and cantilevered roofs.
(i) Structural concrete elements exposed externally: any part of a concrete wall, concrete slab, concrete beam or concrete column. This is a significant breadth: it suggests that exposed concrete structural components forming part of the exterior are captured as exterior features.
(j) Safety and perimeter elements: external balustrades.
(k) Directional signs and advertising structures: directional signs, signboards, skysigns, animated billboards or other advertising structures installed for more than 36 months. The Regulations also include any frame, panel, hoarding or other supporting structure of or for such signs/advertising structures. The “more than 36 months” threshold is a key limiting factor; it implies that shorter-term installations may not fall within the prescribed category (depending on how the Act’s definition operates in conjunction with this regulation).
(l) Clothes drying racks: any clothes drying rack.
(m) Suspended ceiling systems in public-access areas: any suspended ceiling system fitted under or hung from a porch, porte-cochere or portico; a covered concourse or walkway; or a similar shelter. The ceiling must be located at the entrance or side of a building or project from or near an external edge, and it must span across a space below which is accessible to members of the public. Additionally, the underside must be exposed to rain. This is a carefully tailored provision aimed at suspended exterior ceilings that are exposed to weather and public access.
(n) Externally mounted equipment support systems: any of the following used or may be used, for more than 36 months, to attach to, or that supports or may support for use with, the building any externally mounted equipment: (i) a metal or concrete bracket or similar structural supporting system attached to the building and to the externally mounted equipment; and (ii) a cable and other associated components of the structural supporting system, where the cable/components are attached to the building and to the externally mounted equipment.
Regulation 2(2): Definition of “externally mounted equipment”. Regulation 2(2) expands the meaning of “externally mounted equipment” for the purposes of Regulation 2(1)(q). It includes:
- an air-conditioning unit and its condensing equipment;
- a ventilation system;
- a photovoltaic array or panel;
- a solar water heater;
- an apparatus (including a dish antenna) or a combination of apparatus for transmission or direct reception of broadcast matter or wireless communication.
This is a practical and modern list. It captures common building services and façade-mounted technology, and it clarifies that the regulatory focus is not only on the equipment itself but also on the structural supports and associated components used to attach or support that equipment for more than 36 months.
Duration thresholds (“more than 36 months”). Two parts of the list use a “more than 36 months” criterion: (i) directional signs/advertising structures; and (ii) externally mounted equipment support components. For practitioners, this raises interpretive and evidentiary questions: how “installed” or “used” is measured, what documentation is available, and how to treat equipment or signage that is replaced, refurbished, or reinstalled. While the extract does not provide further guidance, the thresholds are clearly intended to distinguish longer-term exterior installations from short-term or temporary works.
How Is This Legislation Structured?
The Regulations are structured as a short instrument with at least two substantive provisions in the extract:
Regulation 1 sets out the citation and commencement date.
Regulation 2 defines “exterior features” by prescribing a list of permanent building features. Regulation 2(1) contains the enumerated categories (a) through (p). Regulation 2(2) provides an interpretive definition of “externally mounted equipment” for the purposes of Regulation 2(1)(q).
Notably, the Regulations do not themselves impose detailed procedural requirements in the extract; instead, they operate as a definitional instrument that feeds into the Building Control Act’s broader regulatory framework.
Who Does This Legislation Apply To?
The Regulations apply to persons and entities whose building-related activities fall within the Building Control Act’s scope and who must classify or manage “exterior features” as defined by the Act and prescribed by these Regulations. In practice, this includes building owners, developers, architects, professional engineers, contractors, and façade or building services specialists who design, install, modify, or maintain exterior elements.
Because the Regulations prescribe what counts as an exterior feature, they affect compliance decisions across the building lifecycle—particularly where approvals, submissions, maintenance obligations, or enforcement actions under the Act depend on whether a component is an exterior feature. The inclusion of externally mounted equipment support systems and public-facing suspended ceilings indicates that the Regulations are relevant to both façade works and building services installations that are visible or attached externally.
Why Is This Legislation Important?
Although the Exterior Features Regulations are short, they are legally significant because they provide the definitional “hook” that can determine whether a particular item is regulated as an exterior feature under the Building Control Act. For practitioners, definitional clarity is often the difference between a compliant pathway and a regulatory breach.
The Regulations are also practically useful because they translate complex building components into a structured legal list. For example, the explicit inclusion of green wall systems (including brackets, growing medium other than soil, and integrated water delivery systems) helps avoid disputes about whether landscaping infrastructure is merely “decorative” or is part of the regulated exterior feature. Similarly, the inclusion of externally mounted equipment support brackets and cables for more than 36 months clarifies that the structural attachment system is captured, not just the equipment.
From an enforcement perspective, the Regulations reduce ambiguity. Regulators and building owners can point to a prescribed category when assessing compliance. For legal advisers, the Regulations therefore support risk assessment and documentation strategies—such as ensuring that façade and building services designs identify which elements are exterior features, and that any approvals or submissions align with the prescribed scope.
Related Legislation
- Building Control Act (Chapter 29) — in particular, section 2(1) (definition of “exterior feature”) and section 49(1) (power to make regulations)
Source Documents
This article provides an overview of the Building Control (Meaning of Exterior Features) Regulations 2021 for legal research and educational purposes. It does not constitute legal advice. Readers should consult the official text for authoritative provisions.