BACKGROUND & OBJECTIVES
- Improving water use efficiency through a zero runoff system
- Reducing rainwater runoff
- Enhancing infiltration and maximizing water recycling
- Supporting water conservation and environmental sustainability
// 01
Our Commitment
Build Green For Planet
WEGE is committed to implementing sustainable construction through the provision of high-quality products and services, supported by responsible environmental management throughout the construction lifecycle, consistent implementation of environmental management systems, control of environmental impacts, as well as innovation and efficiency to support the global climate transition agenda and the creation of sustainable value.
Environmental Performance
(in thousand)
43,603
Water Consumption (m³)
17,799
Electrical Energy Consumption (GJ)
25,143
Fuel Energy Consumption (tCO₂ )
19,858
Emissions Scope 1 (tCO₂ )
4,301
Emissions Scope 2 (tCO₂ )
1,037
Emissions Scope 3 (tCO₂ )
0.2
Hazardous Waste (ton)
10
Non-Hazardous Waste (ton)
4.5
Reuse & Recycle Waste (ton)
Energy Management
Electricity & Fuel Consumption
Satuan : GJWEGE has implemented an Energy Management System based on ISO 50001:2018, with implementation coverage at the Head Office, Factory, Office Facilities within the Modular Factory, as well as Project sites.
The Company is committed to improving energy and fuel efficiency through various initiatives, including the use of solar panels, electricity conservation by switching off unused equipment, optimizing air conditioner (AC) usage, utilizing electric vehicles to reduce fuel consumption, and managing heavy equipment operations to improve fuel efficiency. These initiatives form part of the Company's efforts to support sustainable and environmentally responsible operations.
The corporate energy performance target has been set at 2% energy savings in 2025.
The electricity consumption target for 2025 was set at 19,579 GJ. Actual electricity consumption in 2025 amounted to 17,799 GJ, which was 1,780 GJ below the established target.
Meanwhile, the fuel consumption target for 2025 was set at 426,032 GJ. Actual fuel consumption in 2025 totaled 387,301 GJ, which was 38,731 GJ below the established target.
WEGE supports the transition toward sustainable development through the gradual utilization of renewable energy, which has currently been implemented in modular factory facilities through the use of solar panels as part of efforts to improve energy efficiency and reduce carbon emissions.
February 2026
1.161 kWh
March 2026
1.023 kWh
April 2026
1.387 kWh
WEGE implements energy efficiency programs in its office operations and projects through the use of energy-saving technologies, the optimization of equipment usage, and the sustainable management of electricity consumption. These initiatives help reduce operating costs, lower greenhouse gas emissions, and improve the company’s environmental performance.
HEAD OFFICE
- Maximizing the use of energy-efficient lighting and equipment
- Implementation of motion sensors and light sensors to reduce electricity consumption in specific areas
- Replacement of personal computers with more energy-efficient laptops
- Installation of load-based electricity meters for more accurate monitoring
- Installation of energy-saving reminder stickers in workspaces and public areas as part of an internal conservation campaign
PROJECT
- Building design that maximizes natural lighting during the daytime
- Maximizing the use of energy-efficient lighting and equipment
- Implementation of motion sensors and light sensors to reduce electricity consumption in specific areas
- Replacement of personal computers with more energy-efficient laptops
- Installation of load-based electricity meters for more accurate monitoring
- Strengthening the digitalization of processes, from shop drawing approvals to coordination meetings through online applications, to reduce energy consumption
- Installation of energy-saving reminder stickers in workspaces and public areas as part of an internal conservation campaign
- Utilization of prefabrication methods, use of recycled materials, and selection of local materials with a maximum transportation distance of approximately 800 km
- Establishment of standards and policies to ensure the use of environmentally friendly materials in every project
- Development of modular products that can shorten construction time, reduce energy requirements, and lower emissions
(kWh/m2/month)
Target
≤ 15
Realization
2.82
(% of planned fuel consumption)
Target
≥ 20%
Realization
28%
WEGE strives to optimize its usage through various energy efficiency initiatives. These efforts also support the implementation of Government Regulation No. 70 of 2009 on Energy Conservation.
Water Management
WEGE understands that water is a vital resource for human life, not only to support the company’s operational activities but also for the well-being of communities and environmental sustainability around both the head office and project areas.
The company obtains water from two main sources, namely PDAM (municipal water supply) and groundwater, with management practices that prioritize sustainability principles and the protection of water resources. During the reporting period, water consumption monitoring is carried out at the head office and across all projects. Oversight is conducted regularly by the Corporate Secretary to ensure that water usage remains efficient and meets the established management targets.
The water usage target for the project in 2025 was set at 47,996 m³. Actual water usage in 2025 was recorded at 43,605 m³, which is 4,391 m³ lower than the set target.
Water Conservation in Projects
(Liters/Person/Month)
Target
≤ 1500
Realization
1187
WEGE understands that water is a vital resource for human life, not only to support the company’s operational activities but also for the well-being of communities and environmental sustainability around both the head office and project areas. The company has installed sensor-based water-saving devices to optimize water usage during project activities. In addition, flow meters or water meters are installed at each new project site to improve recording accuracy and enhance the effectiveness of periodic water consumption monitoring.
MAIN CONCEPT OF THE DRAINAGE SYSTEM
RAINWATER MANAGEMENT
WATER EFFICIENCY AND CONSERVATION TARGETS
The company has implemented several water efficiency programs in construction projects.
WATER POLLUTION CONTROL
Considering the increasing scarcity of clean water resources, the company has taken strategic steps to optimize water usage. One of these efforts is the installation of a Waste Water Treatment Plant (WWTP) at the head office since 2021. This facility enables wastewater that has undergone treatment processes to be reused for non-consumptive purposes, such as watering plants and maintaining green areas.
WASTEWATER MANAGEMENT
In wastewater management, the company ensures that every waste stream is properly treated to prevent environmental pollution. Used water from the head office and project sites is channeled through a structured drainage system.
In several projects, water from concrete washing is first directed to sedimentation tanks to remove solid materials before being discharged into the municipal drainage system. Meanwhile, wastewater from toilets is directed to infiltration wells through septic tanks, ensuring that the treatment process is safe and environmentally friendly.
WASTEWATER FROM PORTABLE TOILETS FOR FIELD WORKERS
Collected in temporary septic tanks, with third-party services engaged to transport the waste out of the project site on a weekly basis.
EDUCATION & AWARENESS
The company also implements educational programs for all employees to raise awareness of the importance of water conservation. Awareness campaigns are conducted across all work units, including the head office, factory, and project areas, to build more responsible water usage habits. Through these efforts, the company aims to significantly reduce water consumption while maintaining the sustainability of water resources.
Climate & Carbon
Net Zero Emissions Target 2060
Total Emissions
Year
| Year | Emissions (Scope 1 & Scope 2) | Emissions Reduction | ||
|---|---|---|---|---|
| Emissions Generated | Comparison with Previous Year | Actual | Target | |
| 2022 | - | - | - | - |
| 2023 | 11,880.7 | - | 0% | 0% |
| 2024 | 18,662.0 | 11,880.7 | 0% | 0% |
| 2025 | 24,106.9 | 18,662.0 | 0% | 0% |
| 2026 | 31,723.3 | 24,106.9 | 0% | 0% |
Emission Reduction Performance Table (Scope 1 & Scope 2)
WEGE is committed to supporting the global climate transition through a comprehensive greenhouse gas management strategy. This roadmap outlines the Company’s long-term commitment to reducing operational emissions, improving energy efficiency, accelerating the adoption of renewable energy, and achieving Net Zero Emissions in line with sustainable development principles energy efficiency, electrification at operational activities, and renewable energy uses.
WEGE targets achieving Net Zero Emissions by 2060 for Scope 1 and Scope 2. This commitment is part of the company’s strategic direction to reduce carbon emissions and support global efforts in addressing climate change.
WEGE has established greenhouse gas (GHG) emission reduction targets as part of its long-term commitment toward lower-carbon construction operations. These efforts are carried out gradually through the development of an emissions inventory system, improvement of energy efficiency, and the adoption of more environmentally friendly construction technologies.
The Net Zero Emissions Roadmap outlines a phased decarbonization strategy focused on operational efficiency, electrification, renewable energy integration, and smart energy management to support the achievement of Net Zero Emissions by 2060.
Total Emissions
WEGE gradually manages and reduces greenhouse gas (GHG) emissions through emissions monitoring, energy efficiency initiatives, and the implementation of more sustainable operational practices.
The emission calculations cover Scope 1, Scope 2, and Scope 3 in accordance with the IPCC Guidelines and the electricity emission factors issued by the Directorate General of Electricity (DJK), Ministry of Energy and Mineral Resources (ESDM).
In 2024 and 2025, WEGE has successfully measured and reported Scope 3 emissions for three main categories: upstream transportation and distribution, business travel, and purchased goods and services.
The emissions target for 2025 was set at 27,658 tCO₂e. Actual emissions in 2025 amounted to 25,143 tCO₂e, which was 2,515 tCO₂e above the established target.
WEGE identifies climate change as both a risk and a strategic opportunity in the development of its sustainable business. Key risks include physical impacts such as extreme weather, rising temperatures, flooding, and sea level rise, which may disrupt projects, increase operational costs, and reduce productivity. To mitigate these risks, WEGE implements strengthened risk assessments, adaptive scheduling, more resilient infrastructure design, water use efficiency measures, and project insurance protection.
From a transition perspective, changes in carbon regulations and green building standards present challenges that are addressed through the adoption of green design, the development of low-carbon construction practices, and enhanced ESG transparency to maintain competitiveness and investor confidence. On the opportunity side, WEGE sees significant potential in the development of green buildings, Zero Emission Buildings (ZEB), renewable energy, and green infrastructure, all of which support sustainable business growth and long-term corporate resilience.
Waste & Pollutants
WEGE demonstrates a strong commitment and strategic approach to managing construction and demolition waste responsibly as part of its sustainable construction practices. These commitments and strategies are embedded in project design prior to the commencement of construction activities, ensuring that construction and demolition waste is managed systematically through the principles of reduce, reuse, and recycle (3R). Waste management planning is integrated into project design at the pre-construction stage, enabling comprehensive and systematic waste control from the outset across all construction projects.
In practice, each project establishes specific targets for reducing construction waste, including the implementation of reduce, reuse, and recycle (3R) principles for materials generated throughout the construction process across all projects. WIKA Gedung has implemented waste separation at all construction project sites so that the waste generated can be managed more effectively based on its type and potential for reuse. The company has implemented various initiatives to optimize the utilization of residual materials to enhance efficiency and sustainability, including the use of fly ash and lightweight brick waste as screed mixtures, the reuse of scrap metal, wood, and concrete residues for project purposes, the use of lightweight brick offcuts as mortar mixtures, the conversion of scrap metal into steel decks and safety railings, and the repurposing of used drums as waste containers.
Furthermore, the company implements various environmentally friendly initiatives, including the development of modular construction products to reduce waste generation, the adoption of prefabrication methods and recycled materials, the utilization of locally sourced materials within an approximate radius of ±800 km, and the execution of projects with a life cycle approach to minimize emissions and waste across all construction stages. A notable example of this implementation is demonstrated in the Jakarta International Stadium (JIS) project, where material waste is reused to enhance project sustainability and reduce its ecological footprint.
To ensure the effective implementation of construction waste management, throughout 2025 across all construction projects, WEGE has continuously conducted awareness programs, socialization, and training for all workers and contractors on proper and responsible construction waste management practices.
Construction Waste Management Process Flow
Reuse and Recycling of Construction Project Waste
NON-HAZARDOUS WASTE
Unit: Ton
HAZARDOUS WASTE
Unit: Ton
NON-HAZARDOUS WASTE
Unit: Ton
HAZARDOUS WASTE
Unit: Ton
Waste generation refers to residual materials or by-products resulting from the company’s operational activities, originating from both office operations and project activities. Waste is categorized into two main types: Non-Hazardous Waste and Hazardous Waste.
Overall, waste management shows an improved trend in 2025, particularly in the reduction of both Non-Hazardous and Hazardous Waste in projects.
The company demonstrates its commitment to sustainability through the reduction of waste generation and the enhancement of environmental management practices.
Consistent monitoring, integrated waste management, and the implementation of reduce–reuse–recycle (3R) programs are necessary to maintain and further improve environmental performance in the coming years.
The target for non-B3 waste generation at the project in 2025 was set at 435.63 metric tons. The actual non-B3 waste generation in 2025 was recorded at 396.03 metric tons, which is 39.60 metric tons lower than the set target.
The target for hazardous waste generation at the project in 2025 was set at 51.12 metric tons. The actual hazardous waste generation in 2025 was recorded at 46.48 metric tons, which is 4.64 metric tons lower than the established target.
- Waste management covers 100% of the company’s operations (waste data includes all operational activities).
- he managed waste consists of hazardous waste (B3 - hazardous and toxic materials) and non-hazardous waste.
- Waste management is conducted in line with the company’s environmental commitment and in compliance with applicable regulations (Statement of Commitment for Environmental Management and Monitoring).
- All projects fall under the responsibility of the QSHE Division, which ensures that waste management processes are conducted in a responsible, transparent, and accountable manner.
- The company engages licensed and competent third-party providers for the management of generated waste, including hazardous (B3) waste.
MATERIAL HANDLING AND PLACEMENT
Materials are placed in designated storage areas that are systematically organized, secure, and classified according to their type.
WASTE TYPE IDENTIFICATION (HEAD OFFICE)
Waste is identified to ensure appropriate segregation based on its type and characteristics.
Standardization of Waste Bin Color Coding
Waste Disposal Reporting
aste Receptacle:
- Red. Hazardous Waste (B3)
- Yellow. Inorganic Waste
- Green. Organic Waste
- Grey. Residual Waste
Control of hazardous materials (B3 – hazardous and toxic materials) is implemented to prevent environmental pollution and to ensure occupational safety across operational and project areas. The control process begins with the provision of dedicated hazardous waste (B3) containers and supporting facilities in compliance with applicable safety standards.
Hazardous Waste Storage Facility (B3)
Installation of Hazardous Waste (B3) Warning Symbols and Labels
Hazardous Waste (B3) Balance Sheet
Provision of absorbent materials for spill handling and response
Construction of a Monitoring and Control Pit
Provision of Portable Fire Extinguishers (APAR)
Provision of Designated Hazardous Waste (B3) Containers
Non-hazardous liquid waste refers to wastewater generated from daily operational activities that does not contain hazardous and toxic materials. The company is committed to managing liquid waste in a responsible manner to preserve environmental quality and support sustainability.
In response to increasing awareness of the limited availability of clean water resources, the company has implemented strategic measures to optimize water utilization. A key initiative includes the establishment of a Wastewater Treatment Plant (WWTP) at the head office in 2021. This facility is designed to treat liquid waste prior to discharge, ensuring compliance with regulatory quality standards and supporting the company’s sustainability objectives. Meanwhile, at project sites, non-hazardous liquid waste is managed through licensed third-party service providers for proper collection and disposal.
Water Pollution Prevention and Control
Compliance with Wastewater Treatment Permit (IPLC – Wastewater Treatment License)
Compliance with Designated Monitoring Points
Compliance with Wastewater Quality Standard Parameters
Compliance with Applicable Quality Standards
Compliance with Applicable Technical Requirements
Biological Treatment Tank
Biological Treatment Tank
Septic Tank Service Truck
Septic Tank Service Truck
Waste is collected in a temporary septic tank, with licensed third-party providers engaged for off-site transportation and disposal.
This strategic program of PT Wijaya Karya Bangunan Gedung Tbk (WEGE) represents an initiative to develop the utilization of construction residual materials into value-added materials and products through innovative collaboration with Universitas Gadjah Mada. The program is designed to foster material innovation, develop the company’s intangible assets, and create opportunities for commercialization and new business development based on research and technology outcomes.
In addition to supporting sustainability improvements in construction processes, this program is expected to deliver added value to the company by reducing waste materials, optimizing resource utilization, enhancing operational efficiency, and potentially lowering the Cost of Goods Sold (COGS). Innovation development is also directed toward potential intellectual property (IP/HAKI) ownership, the development of alternative material products, and opportunities for implementation across projects and the broader construction market.
Through synergy between industry and academia, this program represents a strategic step by WEGE in building innovation capabilities focused on efficiency, business value creation, and strengthening the company’s competitiveness in the future.
Biodiversity
WEGE acknowledges that the sustainability of biodiversity is a vital component of environmental quality. Accordingly, the Company is committed to protecting key ecosystem elements, including flora and fauna species, genetic diversity, and the balance of natural ecosystems. Safeguarding these elements is considered an inherent responsibility within the Company’s operations, as stable habitat conditions are essential to sustaining long-term environmental resilience.
WEGE acknowledges that natural capital is a critical factor in sustaining the company’s operations, particularly within the construction sector, which is inherently linked to the utilization of natural resources and land. Accordingly, WEGE conducts biodiversity risk assessments across all construction projects in 2025, covering potential risks such as extreme rainfall, flooding, land-use changes, and ecosystem conditions, including identified risks. The Company integrates environmental and biodiversity considerations into its Risk Register, implements mitigation and environmental restoration measures through vegetation planting initiatives, and strengthens collaboration with key stakeholders to advance sustainable construction practices that minimize ecological impacts while creating long-term value for communities and the environment.
- Planting of approximately 4,310 trees in project areas
- Post-construction environmental recovery and restoration
- Environmental Restoration and Rehabilitation Initiatives
- Environmental Restoration & Rehabilitation
- Enhancement of Local Ecosystem Functions
- Support for the Sustainability of Natural Habitats (Regeneration)
- Collaboration with the Environmental Education Tourism Area Management Unit (UP-KWPLH) Balikpapan
- Environmental Education Area Revitalization Program
- Prevention & Management of Forest Impacts
- Rehabilitation, Restoration, and Equivalent Compensation
- Minimization of Deforestation Across the Operational Value Chain
- In accordance with Indonesian forestry regulations
- Supervision from the planning stage through construction
- Integration of environmental aspects into operations
- Sustainable Infrastructure
- Forest Ecosystem Protection
- Long-Term Environmentally Friendly Development Approach
WEGE has demonstrated its early commitment to biodiversity conservation through the implementation of various initiatives that are integrated into its operational activities as well as its environmental and social responsibility programs.
Products Stewardship
As part of its commitment to sustainable development, WEGE classifies its modular products as part of its sustainable product portfolio, offering them as sustainable construction solutions. Modular is not only viewed as a technological innovation but also as a strategic approach to support green construction principles, the circular economy, and energy efficiency within the construction industry.
The modular concept is a modern construction approach that emphasizes the standardized fabrication of building components off-site, which are then systematically assembled on-site. This method not only improves time efficiency and work quality but also reduces dependency on weather conditions and minimizes the potential for construction errors.
WEGE enhances human resource capacity through green building training to support the development of more sustainable and efficient construction products and processes, while delivering added value to customers and the environment.
To ensure the credibility of its sustainable products for various stakeholders, WEGE’s Green Building sustainable products are currently undergoing external verification. The results of this verification are expected to provide additional assurance regarding product quality, sustainability, and integrity, while also serving as a basis for WEGE to continuously improve its green construction practices and support sustainable development standards.
As part of its commitment to sustainable product development, WEGE operates a Modular Factory in Bogor that supports innovation in modern construction methods. This infrastructure enables improved material efficiency, reduced environmental impact, and the provision of more sustainable building solutions for customers.
WIKA Gedung continues to innovate, research, and develop its modular product portfolio as part of its sustainability strategy, with the aim of providing construction solutions that are more efficient, environmentally friendly, and adaptable to market needs.
Revenue is generated from the application of environmentally friendly materials, modular technology, and energy and water efficiency systems. These products enhance project value while meeting market demand for green construction.
Building Certification
Enhances project competitiveness, attracts investors, and creates opportunities for incentives.
Impact on Revenue
The integration of both drives increased project value, expands market reach, and creates sustainable revenue streams.
MODULAR SUSTAINABLE PRODUCTS
2022
PRODUCTION
2.180
Modul
PRODUCTS SOLD
2.098
Modul
2023
PRODUCTION
591
Modul
PRODUCTS SOLD
173
Modul
2024
PRODUCTION
2.023
Modul
PRODUCTS SOLD
2.602
Modul
2025
PRODUCTION
238
Modul
PRODUCTS SOLD
302
Modul
2026
(Rencana)
PRODUCTION
2134
Modul
1
MODULAR PRODUCT REVENUE
Rp billion
2025
2024
2023
2022
Modular Products
- WEGE Flatpack (WGF)
- Modular Lite (MOLI)
- Toilet Pod
3.05
237.35
131.08
233.99
Total Project Revenue
1,623.56
3,673.53
3,979.71
2,366.00
% Modular Product Revenue
0.19%
6.46%
3.29%
9.89%
RECOMMENDATIONS 2025
Encourage the growth of sustainable product revenue through product innovation, market expansion, and the increase of sustainable modular projects.
2
GREEN BUILDING REVENUE
Rp million
|
PROYEK
|
2025
|
2024
|
2023
|
2022
|
|---|---|---|---|---|
|
Jakarta International Stadium (JO)
|
- | - | - | 158,929 |
|
Package 3 Construction of AGLC, ASLC & IFFLC (UGM) – JO
|
- | - | - | - |
|
Building SGLC & ERIC - UGM (JO)
|
- | - | - | 42,313 |
|
Industry 4.0 Human Resource Development & Innovation Center Building
|
- | - | - | - |
|
Construction of the MKGI Education and Laboratory Building (Center of Excellence) – BMKG
|
- | - | - | 7,486 |
|
Coordinating Ministry Building 1 – IKN
|
33,544 | 475,234 | 284,791 | - |
|
Paspampres Apartment (ASN Housing – IKN)
|
180,547 | 1,189,309 | 412,447 | - |
|
Construction of Wing 1 Building and Ministry of Public Works and Housing Office Complex
|
307,836 | 283,049 | - | - |
|
Basilica and Church Building and Complex (JO)
|
200,149 | - | - | - |
|
Design and Build of the Undip Tembalang Tower Construction
|
76,811 | - | - | - |
|
TOTAL
Rp million
|
798,887 | 1,947,592 | 697,238 | 208,728 |
|
Total Project Revenue
Rp million
|
1,623.56 | 3,673.53 | 3,979.71 | 2,366.00 |
|
% Green Building Revenue
|
49% | 53% | 18% | 9% |
1
Total Number of Buildings
|
PROYEK
|
2025
|
2024
|
2023
|
2022
|
|---|---|---|---|---|
|
Number of Green Certified Buildings
|
2 | 2 | 3 | - |
|
Total Number of Projects
|
7 | 14 | 21 | 18 |
|
% Green Certified Buildings as a Percentage of Total Projects
|
28,5% | 14,2% | 14,2% | 0% |
Construction of the Paspampres Apartment – IKN
Category
Primary Green Building (BGH) – PUPR
Construction of Wing 1 of the Ministry of Public Works and Housing – IKN
Category
Primary Green Building (BGH) – PUPR
Development of Basilica and Church Buildings and Complex
Category
Primary Green Building (BGH) – PUPR
Construction of the Undip Tembalang Tower
Category
Primary Green Building (BGH) – PUPR
Sustainable Raw Materials
In an effort to reduce waste, WEGE implements modular products using the Prefabricated Prefinished Volumetric Construction (PPVC) method to minimize construction waste and improve efficiency. The use of modular construction also enhances time and resource efficiency, while supporting the achievement of the company’s sustainability targets.
BENEFITS OF THE PPVC METHOD
- More precise construction quality
- Accelerated project completion time
- Lower environmental impact
- Resource use efficiency
MODULAR COMPONENTS ARE ASSEMBLED OFF-SITE
- The installation process becomes faster and more orderly
- Reduces material waste
- Reduces construction waste
- Minimizes noise and air pollution at the project site
- Creates a safer and cleaner working environment for workers
UTILIZATION OF MATERIAL RESIDUES
- Concrete remaining from the casting process is reused for concrete decking work
- Processing scrap metal into “cakar ayam” elements, steel decks, and safety railings
- Use of fly ash and lightweight brick waste as a partial substitute for sand in floor screed work
- Use of lightweight brick offcuts as a mixture in mortar for wall plastering
- Repurposing used drums as waste bins
OTHER INITIATIVES IN MATERIAL MANAGEMENT
- Development of modular products to reduce emissions and construction waste generated
- Implementation of more environmentally friendly production methods, such as prefabrication, the use of recycled materials, and the selection of local materials sourced within a radius of approximately ±800 km
- Project execution that considers the material life cycle to reduce waste and emissions at each stage of construction