Materials and Methods in Building Construction - VIII
21ARC82
“Building Rating Systems Report”
Submitted by:
Shreya Krishnappa - 1CF21AT081
Suma Auradkar - 1CF21AT090
Tanmayi M Harish - 1CF21AT096
Varuni S Joshi- 1CF21AT104
Semester: 8th; Section: C
BMS College of ARCHITECTURE, DESIGN & PLANNING
BULL TEMPLE ROAD, BASAVANGUDI
BENGALURU
Building Rating Systems IGBC Green Commercial Rating
IGBC Green Commercial Rating System
● The IGBC Green Commercial rating system, developed by the Indian Green
Building Council, is tailored for commercial buildings such as offices, IT parks,
malls, hotels, and banks.
● It provides guidelines and benchmarks for designing,
constructing, and operating sustainable commercial spaces
that reduce environmental impact and enhance occupant
well-being.
● The IGBC Green Rating System for Commercial Buildings
was launched in 2007 by the Indian Green Building Council
(IGBC).
● IGBC itself was formed by the Confederation of Indian
Industry (CII) in 2001, with the goal of promoting sustainable
and eco-friendly building practices in India.
● The Green Rating for Commercial Buildings was one of the early rating systems
introduced to specifically cater to office spaces and other commercial
developments, setting benchmarks for energy efficiency, water savings, waste
reduction, and overall environmental responsibility.
Why Should Businesses Care About IGBC
Certification?
For startups, SMEs, and corporate giants, being in an IGBC-certified building is not just
a check in a list. It’s a competitive advantage.
● Economies: This is because expenses on utilities and operations are reduced,
which are directly proportional to the company’s profits.
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Building Rating Systems IGBC Green Commercial Rating
● Employee satisfaction: The quality of air and light, as well as the general indoor
environment, can be said to improve the quality of life of the employees and
hence productivity.
● Brand value: The companies that are based in sustainable offices are perceived
to be socially responsible and progressive, two factors that are highly valued in
the current society and the market.
● Regulatory advantage: With the change of time and policy, it is easier to get
approval if the building is green-certified.
● Sustainability: As more companies engage in ESG reporting, green buildings
help organizations to be ready for the next changes in the laws and demands of
investors.
Central Government Incentives:
● Faster Environmental Clearance for green-certified projects.
● Priority lending for green buildings under sustainable housing schemes
(especially via banks that align with RBI's sustainable development goals).
State-Level Incentives (Examples):
● Maharashtra: Additional FSI (Floor Space Index) for IGBC-certified green
buildings.
● Punjab: 5% rebate on property tax for green buildings.
● Haryana: Up to 25% rebate on external development charges (EDC).
● Andhra Pradesh and Telangana: Fast-track approval process for IGBC-rated
projects.
● Karnataka: Property tax rebates and incentives for water and energy-efficient
buildings.
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Building Rating Systems IGBC Green Commercial Rating
Core Focus Areas
1. Sustainable Site Planning
2. Water Efficiency
3. Energy Efficiency
4. Building Materials & Resources
5. Indoor Environmental Quality
6. Innovation & Design Process
Rating – Key Criteria
1. Energy Efficiency (Max: ~30–35 points)
● Energy-efficient HVAC, lighting, and appliances
● Building envelope performance (U-value, shading)
● Use of on-site/off-site renewable energy
● Advanced energy metering and management systems
● Daylighting and occupancy sensors
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Building Rating Systems IGBC Green Commercial Rating
2.Indoor Environmental Quality (IEQ) (Max: ~20 points)
● Fresh air ventilation and CO₂ monitoring
● Low-emitting materials (paints, adhesives, carpets)
● Daylight and external views
● Acoustic design for occupant comfort
● Thermal and visual comfort standards
3. Water Efficiency (Max: ~15 points)
● Reduction in potable water use through low-flow fixtures
● Rainwater harvesting and storage
● Wastewater treatment and reuse for flushing/landscaping
● Efficient irrigation systems (drip/sprinkler)
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Building Rating Systems IGBC Green Commercial Rating
4.Materials and Resources (Max: ~15 points)
● Use of recycled, rapidly renewable, or regional materials
● Modular furniture and low-VOC paints/adhesives
● Waste segregation and responsible disposal
● Reuse of existing interiors and structural elements
5. Site Selection & Planning (Max:
~10 points)
● Selection of sustainable sites
(brownfield/infill development)
● Proximity to public transport
● Basic amenities near site
● Erosion and sedimentation control
● Native/low-water landscaping
6. Innovation & Design Process (Max: ~5–7 points)
● Exceptional performance beyond criteria
● Innovative green technologies
● Green education and awareness within the space
● IGBC Accredited Professional (AP) involved in project
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Building Rating Systems IGBC Green Commercial Rating
RATING LEVELS
Infosys Ltd – SDB 1, Pocharam Campus, Hyderabad
- A Case Study
● Project: Software Development Block
1 (SDB-1)
● Client: Infosys Limited
● Architect: Sundaram Architects
● Site Area (full campus): 447 acres
● Typology: IT/ITES Commercial Office
● Rating: Platinum
● Certification Year: 2011
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Building Rating Systems IGBC Green Commercial Rating
PROJECT DETAILS:
● Location: Hyderabad
● Site area: 64,806.92 m²
● Built-up area: 24,730 m²
● Air-conditioned area: 17,338 m²
● Non-Air-conditioned area: 7,392 m²
● Energy consumption reduction: 56%
reduction
● Water consumption reduction: 56%
reduction
● EPI*:51.85 kWh/SqM/year
● Occupancy hours: 8.5 hrs/day
● Renewable energy installed on site: 44 KWp
*EPI = Annual Energy Consumption (in kWh) / Built-up Area (in m²)
IGBC Criteria and Points Gained
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Building Rating Systems IGBC Green Commercial Rating
Key Green Features
1. Radiant Cooling Technology
● Pipes are installed in floors, walls, or ceilings and circulate chilled water.
● Radiant cooling is most effective when used in conjunction with other
energy-reducing systems.
● Cooling inside the office space is achieved when the cold slab absorbs the heat
2. Energy Efficiency
● Solar panels installed on rooftops.
● Use of daylight sensors and occupancy sensors.
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Building Rating Systems IGBC Green Commercial Rating
● Double-glazed units with argon infill (DGU) with low Solar Heat Gain Coefficient
(SHGC).
● Above each window, a light shelf (a flat, horizontal, panel) is installed which
reflects the incoming sunlight onto the ceiling, thereby distributing deeper into the
space.
3. Building Materials and Resources
● Recycled steel used in
structure.
● Fly ash used in concrete
mix.
● 95% construction waste
diverted from landfills.
● The width of the floor plate
is restricted to 16m to
ensure adequate daylight from the north and south facing windows.
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Building Rating Systems IGBC Green Commercial Rating
4. Indoor Environmental Quality
● Dedicated fresh air systems beyond code minimum.
● All paints, adhesives, and sealants were low-VOC certified.
● Internal noise levels controlled by acoustic insulation.
Performance Outcomes
● Energy saving: 42% reduction compared to baseline.
● Water saving: 55% potable water savings.
● Operational CO₂ reduction: ~1,500 metric tons/year.
● Occupant comfort: Enhanced daylighting, better air quality.
● sustainable planning like preserving trees and topsoil.
● Water usage was reduced 56% by low-flow fixtures and 78% reuse.
● Passive design like orientation and shading reduced solar heat gain.
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Building Rating Systems IGBC Green Commercial Rating
● Energy use was cut 56% using efficient lighting, envelope insulation, and a
44kw solar array. Low-impact materials were also utilized.
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Building Rating Systems IGBC Green Commercial Rating
SOURCES
● https://www.rehau.com/us-en/infosys-sbd1
● https://www.slideshare.net/slideshow/infosys-hyderabad/42504215
● https://www.scribd.com/document/517699152/Infosys-BC-1
● https://www.scribd.com/document/517699152/Infosys-BC-1
● https://www.rehau.com/in-en/infosys-software-development-block
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