Environmental Accreditations

SKA Rating System

SKA Rating is a RICS (Royal Institute of Charted Surveyors) led and owned environmental assessment method, benchmark and standard for non-domestic fit outs. It helps landlords and tenants assess fit out projects against a set of sustainability good practice criteria, known as Good Practice Measures (GPM).

The offices scheme consists of more than a hundred GPM covering energy and CO2 emissions, waste, water, materials, pollution, wellbeing and transport.

It is estimated that 11% of UK construction spending is on fit-outs and that buildings may have 30-40 fit-outs during their life cycle.

Although there were established tools for assessing the environmental impact of whole buildings industry feedback that the certification of fit out, especially on existing buildings, indicated that attempts to use whole building systems were unsatisfactory both in terms of high costs and low relevance.

SKA Rating has been developed with designers, contractors, corporate occupiers, managing agents and consultants. It differs from other labelling systems as it is project driven labelling fit out projects irrespective of base building construction.  


BREEAM is an environmental assessment method and rating system for buildings, with 425,000 buildings with certified BREEAM assessment ratings and two million registered for assessment since it was first launched in 1990.

BREEAM sets the standard for best practice in sustainable building design, construction and operation and has become one of the most comprehensive and widely recognised measures of a building's environmental performance. It encourages designers, clients and others to think about low carbon and low impact design, minimising the energy demands created by a building before considering energy efficiency and low carbon technologies.

A BREEAM assessment uses recognised measures of performance, which are set against established benchmarks, to evaluate a building’s specification, design, construction and use. The measures used represent a broad range of categories and criteria from energy to ecology, energy and water use, the internal environment (health and well-being), pollution, transport, materials, waste, ecology and management processes.

BREEAM addresses wide-ranging environmental and sustainability issues. This process enables developers, designers and building managers to demonstrate the environmental credentials of their buildings to clients, planners and other initial parties.

Green Star

Green Star is an internationally recognised sustainability rating system for buildings. Established by the Green Building Council of Australia in 2003, Green Star is Australia's only national, voluntary, rating system for buildings and communities. The Green Star rating system operates across sectors dictating how the built environment in Australia is designed, constructed and operated.

By acknowledging that the built environment is currently the world's single largest contributor to greenhouse gas emissions, consumes a third of our water and generates 40 per cent of our waste, Green Star is helping to develop environmental efficiencies in our buildings, boost productivity, create jobs and improve the health and wellbeing of communities.

The Green Star rating system is a set of practice benchmarks for sustainability that is widely accepted in the marketplace by clients, specifiers and building users.

Global Green Tag

Global Green Tag is a unique, independent third party, green building and other sustainable product rating and certification program based on Life Cycle Assessment (LCA).

An Australian developed system with a global focus, the programme is comprised of two independent rating systems: GreenRate and LCARate. Green Tag is the Australian Federal Government agency (ACCC) approved National Certification Mark.

It applies a robust set of sustainability metrics to construction products. Using LCA to rate the ‘cradle to end-of-life-fate’ of eco-preferred products.

Global Green Tag operates the only ACCC approved National Certification Mark in the green building materials sector. A Green Tag certified product informs specifiers that they can trust the green performance of the product.

Global Green Tag is a Conformity Assessment Body (CAB) recognised by the Green Building Council of Australia and New Zealand.


LEED (Leadership in Energy & Environmental Design) is a rating system established by the United States Green Building Council (USGBC) to evaluate the environmental performance of a building and to drive market change toward sustainable design. The process was launched in an effort to develop a “consensus-based, market-driven rating system to accelerate the development and implementation of green building practises”.

Projects are awarded credits for environmental and sustainable actions throughout the specification, construction and use of a building. There are various types of LEED rating dependent on sector and type of building furthermore, credits differ for each rating system.

Estidama Pearl Building Rating System  

Established in Abu Dhabi the capital of the UAE, Estidama is a building design methodology for constructing and operating buildings and communities more sustainably.

It aims to form a framework for measuring sustainability performance beyond the usual planning and construction phases.

The program is a key aspect of the "Abu Dhabi Vision 2030" drive to build the Abu Dhabi emirate according to innovative green standards. Estidama assures that sustainability is continually addressed through four pre-defined angles: environmental, economic, social and cultural.

"Estidama" is the Arabic word for sustainability.

Within Estidama, is a green building rating system called the Pearl Building Rating System that is utilized to evaluate sustainable building development practices in Abu Dhabi.

The Pearl Building Rating System encourages water, energy and waste minimization, local material use and aims to improve supply chains for sustainable and recycled materials and products.

Established in 2010 the Pearl Building Rating system is mandatory in Abu Dhabi - all buildings must achieve a minimum 1 Pearl Rating, and all government-funded buildings must achieve a minimum 2 Pearl Rating. The rating system can be applied to buildings in all sectors of the built environment.


The Global Sustainability Assessment System (GSAS) is a performance-based sustainable building rating system developed for the creation of a sustainable built environment that not only minimizes its ecological impact but also preserves the values, traditions and identity of the region.

Originally called QSAS, the Gulf Organization for Research and Development (GORD) developed the system to provide the systematic assessment customized to the unique conditions and requirements of the State of Qatar. Since then, the rating schemes have been developed for the transition from local to a global scale.

The primary objective of GSAS is to create a sustainable, built environment that minimises ecological impact while addressing specific regional needs and those of the surrounding environment.

GSAS criteria include the measurement of energy and water consumption and indoor environmental performance of buildings. The application of GSAS criteria to a building's design and construction contributes to the improvement of the overall quality, maintenance requirements and life span of the building.

This provides a long term benefit to building owners as the real estate asset is cost effective to maintain, performs better for tenants/occupants and is more competitive in the real estate market than a building that is not GSAS certified.

GSAS has been the foundation of standards and specification for the Lusail City development and is applicable to religious, residential, commercial, leisure and education buildings.
The GSAS Certification Review Board is responsible for administering GSAS certification therefore project designers must be registered with GORD in order to receive the certification.
SAS International are an affiliate member of GSAS. SAS International’s products will contribute toward credits for areas such as acoustics, VOCs, recycled materials and design for disassembly.