Green buildings in Australia are assessed and rated by a variety of government and independent ratings systems.
The Green Building Council of Australia (GBCA) has developed a green building standard known as Green Star, with the first Green Star rating in Australia awarded to 8 Brindabella Circuit at Canberra Airport in 2004. [1] [2] [3] As of April 2013, over 550 projects have been Green-Star certified, representing 8 million square metres of gross floor area and over 20% of Australia's CBD office space. [4]
EER: Energy Efficiency Rating launched in 1996 and in Australia is a system ranging from 0-10 stars and mandatory for buildings in the Australian Capital Territory (ACT) region
The Green Star environmental rating tools for buildings benchmark the potential of buildings based on nine environmental impact categories: Management; Indoor Environment Quality; Energy; Transport; Water; Materials; Land Use & Ecology; Emissions and Innovation. Green Star also has a tool which focuses on neighborhood development.
The National Australian Built Environment Rating System (NABERS), is a government initiative to measure and compare the environmental performance of Australian buildings. The NABERS ratings for office buildings include: Energy; Water; Waste and Indoor environment.
A rating for transport is also in development. Together, these ratings can provide a comprehensive picture of the sustainability performance of office buildings and tenancies. Ratings are also available for homes and hotels. Retail and hospital ratings will be launched later this year.
The Green Building Council of Australia has certified more than 600 buildings around Australia, among them the 6 Green Star certification of Trevor Pearcey House in Canberra, the refurbished facility of Australian Ethical Investment Ltd. [5] The total cost of the renovation was $1.7 million, and produced an estimated 75% reductions in carbon dioxide emissions, 75% reduction in water usage, and used over 80% recycled materials. The architects were Collard Clarke Jackson Canberra, architectural work done by Kevin Miller, interior design by Katy Mutton. [6]
As in 2022, Australia leads the way globally in rooftop solar power [7] [8]
In NSW, an on-line assessment system called BASIX (Building Sustainability Index) requires that all new residential developments to reduce water consumption by 40%, and CO2 emissions by 40% for detached dwellings and between 20 and 30% for multi unit dwellings compared to an average baseline. The online system provides designers with a mathematical model of the development that considered the interactions between the energy and water systems of the whole, drawing on climatic and normalised rainfall data for individual locations.
Guidelines for building developments in each project are outlined in the bylaws. The bylaws include various permutations of grey water reuse, reuse of stormwater, capture of rainwater, use of solar panels for electricity and hotwater, solar passive building design and community gardens and landscaping.
Melbourne has a rapidly growing environmental consciousness, many government subsidies and rebates are available for water tanks, water efficient products (such as shower heads) and solar hot water systems.
In Perth, Western Australia, there are at least three different projects that incorporate the principles of green building. The Office development located in Murray Street, West Perth being designed by Eco Design Consultant in collaboration with Troppo Architects is one of them. The other two are mixed development along Wellington Street, in the city centre. Guidelines for building developments in each project are outlined in the bylaws and the Green Building Council of Australia.
The Queensland government has published some advice on state requirements, codes and laws for sustainable house design and construction. [9]
Green building means building sustainably. [10] [11] [12] [13] [14] [15] [16] Ideally a sustainable house will have some or all of the following characteristics:
The Australian government publishes Your Home: Australia’s guide to environmentally sustainable homes, as a comprehensive guide for homeowners, builders and designers to provide sustainability inspiration. [34] The Design for place web site accompanies Your home. It consists of three energy efficient designs, created by architects, with specifications for each Australian capital city, plus Cairns. [35]
The Alternative Technology Association, branded as Renew Australia, was founded in 1980. [36] It engages in public advocacy for sustainability, sponsors events and publishes a number of resources. [37] [38] These publications include
Sustainable House Day is an annual, largely online event sponsored by Renew Australia, in which members conduct tours of their sustainable homes. [44] [45]
Renew sponsors occasional "Speed date a sustainability expert" events to allow home builders and renovators to have quick meetings with a range of architects and builders with sustainability interests and experience, to review their designs. [46]
Green: design, architecture, landscape, travel is a quarterly lifestyle magazine, which includes articles on sustainable houses. [47]
Building your own home : a comprehensive guide for owner-builders has a sustainability, energy efficiency focus. [48]
A favoured traditional housing form is the Queenslander. They are sustainable in that they are built of wood, an arguably renewable resource. Ventilation is excellent, especially in houses with hipped and vented rooves, which allow convective cooling, as well as cross ventilation. They have little thermal mass and are cold in Winter at the southern end of their range. Lighting can be a problem if verandas are encircling, but a north facing veranda on a sunny Winter's morning can be a delightful outdoor living space.
Coober Pedy dug outs are another vernacular Australian housing form. They meet the criteria of sustainability by having an even year round temperature, despite extreme outside seasonal and daily fluctuations. Lighting is provided by windows, skylights and doors into hillsides, and ventilation by shafts. [49]
We have a number of believers in off-grid sustainable houses, some of whom are survivalists [50] [51] [52] [53] [54]
Tiny houses have a certain following. [55] [56] [57] [58] [59] [60] [61] They are a commitment to minimalism is possessions and number of visitors and inhabitants, but sustainable in their small size. [62] [63] [64] They are prone to problems of grid connections (water, energy, waste disposal), and if built on land not owned by the homeowner, owners can find themselves summarily “homeless” if the land they occupy is sold. [65]
Houses with a NatHERS rating of ten stars have been built in Australia. [66] [67] [68] One is at Cape Paterson, near Wonthaggi on the Bass Strait coast of Victoria. (climate zone 5) [69] [70] Josh Byrne's house is an experimental and demonstration house in Perth Western Australia. (climate zone 5) [71] [72] Another is in Caloundra, in South East Queensland (climate zone 2) [73] The Ten Star House in Woodforde, Adelaide (climate zone 5) was exhibited at Sustainable House Day, 2021 and can be seen in a video tour and series of professional photographs online. [74] [75]
Passive houses, which use solar energy for space heating and cooling, were invented in Germany as Passivhaus are gaining in popularity. [76] [77] [78] [79] [80] [81] [82]
Australia's climate zones. [83] The National Construction Code has eight climate zones (as published by the Australian Building Codes Board) [84] [85]
The Nationwide House Energy Rating Scheme (NatHERS) [66] It generates a star rating of a home's energy efficiency, out of maximum of ten. After a long campaign, new houses are required to reach a star rating of seven under the National Construction Code. [86] [87] [88] [89]
BASIX (Building Sustainability Index) [90] is a mandatory planning tool for new homes and renovations in New South Wales worth more than $50000.
Housing Industry Association GreenSmart program [91] This program provides a training program for HIA members in sustainable building design and techniques. Awards are given annually for the designers and builders of the most environmentally sustainable homes.
The Water Efficiency Labelling and Standards [92] is a labelling scheme to allow consumers to choose the most efficient water using devices, and conserve water in home use.
The Window Energy Rating Scheme (WERS) [93] is a consumer labelling scheme for window energy efficiency and its impact on the whole house. It is managed by the Australian Glass and Window Association.
Energy Rating [94] A consumer labelling scheme for energy efficient appliances.
Good Environmental Choice Australia [95] certifies consumer products in general for environmental sustainability.
BERS (Building Energy Rating Scheme) Pro is based on the same underlying CSIRO engine as NatHERS. It rates the energy efficiency of Australian homes in all climate zones, from the tropics to the mountains. [96] This tool is far better for rating a home, unit or townhouse energy performance than the alternative prescriptive method.
FirstRate is also based on the same underlying CSIRO engine as NatHERS. [66] [97] It is interactive with a graphic user interface. Thermal performance assessors and designers can use it against floor plans to arrive at an energy rating.
AS3959: 2018 Construction of buildings in bushfire prone areas. This is the Australian Standard on this topic and is accessible from SAI Global. [98] [99] [100]
The Residential Efficiency Scorecard allows renters and homeowners to obtain an impartial and objective assessment of the NatHERs rated energy efficiency of their homes, with a range of practical improvement suggestions. [101] [102] it is managed by the Victorian government, for the benefit of all Australian governments, and assessments are available around Australia.
Livable Housing Australia has a set of guidelines to ensure that houses are suitable for everyone with ease of access and navigation and can be easily and cost-effectively modified as the residents' life circumstances change. [103]
Green Tick® Global [104] A New Zealand invention, now global, that certifies products, events, food, businesses, supply chains, building sites and services for carbon emissions, fair trade, GE free, naturalness and sustainability.
Forest Stewardship Council [105] Certifies forest products, including wood, for the social, economic and environmental impacts of their harvesting and removal.
BREEAM's (Building Research Establishment Environmental Assessment Method) Green Guide [106] A British certification scheme for building sustainability.
Global GreenTag [107] Building products certification scheme for sustainability.
A heat pump is a device that consumes work to transfer heat from a cold heat sink to a hot heat sink. Specifically, the heat pump transfers thermal energy using a refrigeration cycle, cooling the cool space and warming the warm space. In cold weather, a heat pump can move heat from the cool outdoors to warm a house ; the pump may also be designed to move heat from the house to the warmer outdoors in warm weather. As they transfer heat rather than generating heat, they are more energy-efficient than other ways of heating or cooling a home.
Sustainable living describes a lifestyle that attempts to reduce the use of Earth's natural resources by an individual or society. Its practitioners often attempt to reduce their ecological footprint by altering their home designs and methods of transportation, energy consumption and diet. Its proponents aim to conduct their lives in ways that are consistent with sustainability, naturally balanced, and respectful of humanity's symbiotic relationship with the Earth's natural ecology. The practice and general philosophy of ecological living closely follows the overall principles of sustainable development.
Energy conservation is the effort to reduce wasteful energy consumption by using fewer energy services. This can be done by using energy more effectively or changing one's behavior to use less service. Energy conservation can be achieved through efficient energy use, which has some advantages, including a reduction in greenhouse gas emissions and a smaller carbon footprint, as well as cost, water, and energy savings.
Green building refers to both a structure and the application of processes that are environmentally responsible and resource-efficient throughout a building's life-cycle: from planning to design, construction, operation, maintenance, renovation, and demolition. This requires close cooperation of the contractor, the architects, the engineers, and the client at all project stages. The Green Building practice expands and complements the classical building design concerns of economy, utility, durability, and comfort. Green building also refers to saving resources to the maximum extent, including energy saving, land saving, water saving, material saving, etc., during the whole life cycle of the building, protecting the environment and reducing pollution, providing people with healthy, comfortable and efficient use of space, and being in harmony with nature. Buildings that live in harmony; green building technology focuses on low consumption, high efficiency, economy, environmental protection, integration and optimization.’
A low-energy house is characterized by an energy-efficient design and technical features which enable it to provide high living standards and comfort with low energy consumption and carbon emissions. Traditional heating and active cooling systems are absent, or their use is secondary. Low-energy buildings may be viewed as examples of sustainable architecture. Low-energy houses often have active and passive solar building design and components, which reduce the house's energy consumption and minimally impact the resident's lifestyle. Throughout the world, companies and non-profit organizations provide guidelines and issue certifications to guarantee the energy performance of buildings and their processes and materials. Certifications include passive house, BBC—Bâtiment Basse Consommation—Effinergie (France), zero-carbon house (UK), and Minergie (Switzerland).
Passive house is a voluntary standard for energy efficiency in a building, which reduces the building's ecological footprint. Conforming to these standards results in ultra-low energy buildings that require little energy for space heating or cooling. A similar standard, MINERGIE-P, is used in Switzerland. Standards are available for residential properties and several office buildings, schools, kindergartens and a supermarket have also been constructed to the standard. The design is not an attachment or supplement to architectural design, but a design process that integrates with architectural design. Although it is generally applied to new buildings, it has also been used for refurbishments.
Sustainable architecture is architecture that seeks to minimize the negative environmental impact of buildings through improved efficiency and moderation in the use of materials, energy, development space and the ecosystem at large. Sustainable architecture uses a conscious approach to energy and ecological conservation in the design of the built environment.
Leadership in Energy and Environmental Design (LEED) is a green building certification program used worldwide. Developed by the non-profit U.S. Green Building Council (USGBC), it includes a set of rating systems for the design, construction, operation, and maintenance of green buildings, homes, and neighborhoods, which aims to help building owners and operators be environmentally responsible and use resources efficiently.
The Nationwide House Energy Rating Scheme (NatHERS) is an Australian scheme to measure the energy efficiency of a residential dwelling. An accredited software tool assesses the home based on a variety of criteria and produces an energy star rating.
A Zero-Energy Building (ZEB), also known as a Net Zero-Energy (NZE) building, is a building with net zero energy consumption, meaning the total amount of energy used by the building on an annual basis is equal to the amount of renewable energy created on the site or in other definitions by renewable energy sources offsite, using technology such as heat pumps, high efficiency windows and insulation, and solar panels.
Renewable heat is an application of renewable energy referring to the generation of heat from renewable sources; for example, feeding radiators with water warmed by focused solar radiation rather than by a fossil fuel boiler. Renewable heat technologies include renewable biofuels, solar heating, geothermal heating, heat pumps and heat exchangers. Insulation is almost always an important factor in how renewable heating is implemented.
Domestic housing in the United Kingdom presents a possible opportunity for achieving the 20% overall cut in UK greenhouse gas emissions targeted by the Government for 2010. However, the process of achieving that drop is proving problematic given the very wide range of age and condition of the UK housing stock.
A sustainable city, eco-city, or green city is a city designed with consideration for social, economic, environmental impact, and resilient habitat for existing populations, without compromising the ability of future generations to experience the same. The UN Sustainable Development Goal 11 defines sustainable cities as those that are dedicated to achieving green sustainability, social sustainability and economic sustainability. They are committed to doing so by enabling opportunities for all through a design focused on inclusivity as well as maintaining a sustainable economic growth. The focus will also includes minimizing required inputs of energy, water, and food, and drastically reducing waste, output of heat, air pollution – CO2, methane, and water pollution. Richard Register, a visual artist, first coined the term ecocity in his 1987 book Ecocity Berkeley: Building Cities for a Healthy Future, where he offers innovative city planning solutions that would work anywhere. Other leading figures who envisioned sustainable cities are architect Paul F Downton, who later founded the company Ecopolis Pty Ltd, as well as authors Timothy Beatley and Steffen Lehmann, who have written extensively on the subject. The field of industrial ecology is sometimes used in planning these cities.
The Code for Sustainable Homes was an environmental assessment method for rating and certifying the performance of new homes in United Kingdom. First introduced in 2006, it is a national standard for use in the design and construction of new homes with a view to encouraging continuous improvement in sustainable home building. In 2015 the Government in England withdrew it, consolidating some standards into Building Regulations.
Efficient energy use, or energy efficiency, is the process of reducing the amount of energy required to provide products and services. There are many technologies and methods available that are more energy efficient than conventional systems. For example, insulating a building allows it to use less heating and cooling energy while still maintaining a comfortable temperature. Another method is to remove energy subsidies that promote high energy consumption and inefficient energy use. Improved energy efficiency in buildings, industrial processes and transportation could reduce the world's energy needs in 2050 by one third.
Both the public and private sectors in the United Kingdom promote green building. Presently, there are already regulatory mechanisms in place that establish Britain's commitment to this kind of building construction. The government, for instance, set out a target that by 2016, all new homes will have zero carbon emission and it also includes a progressive tightening of energy efficiency regulations by 25 percent and 44 percent in 2010 and 2013, respectively. The UK Building Regulations set requirements for insulation levels and other aspects of sustainability in building construction.
A green home is a type of house designed to be environmentally sustainable. Green homes focus on the efficient use of "energy, water, and building materials". A green home may use sustainably sourced, environmentally friendly, and/or recycled building materials. This includes materials like reclaimed wood, recycled metal, and low VOC paints. Additionally, green homes often prioritize energy efficiency by incorporating features, such as high-performance insulation, energy-efficient appliances, and smart home technologies that monitor and optimize energy usage. Water conservation is another important aspect, with green homes often featuring water-saving fixtures, rainwater harvesting systems, and grey water recycling systems to reduce water waste. It may include sustainable energy sources such as solar or geothermal, and be sited to take maximum advantage of natural features such as sunlight and tree cover to improve energy efficiency.
Sustainable refurbishment describes working on existing buildings to improve their environmental performance using sustainable methods and materials. A refurbishment or retrofit is defined as: "any work to a building over and above maintenance to change its capacity, function or performance' in other words, any intervention to adjust, reuse, or upgrade a building to suit new conditions or requirements". Refurbishment can be done to a part of a building, an entire building, or a campus. Sustainable refurbishment takes this a step further to modify the existing building to perform better in terms of its environmental impact and its occupants' environment.
Bangladesh is one of the most vulnerable nations in the world due to climate change. As the ninth most populous country and twelfth most densely populated countries in the world, its rising population and limited land space have put tremendous strains on the urban ecosystem. The capital of Dhaka itself underwent severe transformations in recent years to catch up the increased rate of urbanisation. This change was paralleled by a boom in the real estate, construction and housing industry. According to United Nations Population Fund (UNFPA), Dhaka is one of the most polluted cities in the world.
Earthship Brighton is a self-sustainable building, completed in 2006 and owned by the non-profit Low Carbon Trust, situated in Stanmer Park, Brighton, England.
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