Modern buildings consume about 25 to 30% of total energy, and up to 30% of fresh potable water, and generate approximately 40% of total waste. Sustainable buildings have demonstrated reduction in energy and water consumption to less than half of the present consumption in conventional buildings, and complete elimination of the construction and operational waste through recycling.
Thus, all buildings on various plot sizes shall comply with the green norms and conform to the requirements mandatory for sanction as mentioned in this chapter.
These provisions are not specific to any rating system and are not intended to provide single metric indication of overall building performance. These provisions allow the practitioners to easily exercise their engineering judgment in holistically and objectively applying the underlying principles of sustainability to a development or building facility, considering its functionality and required comfort level.
11.1 Provision for Applicability
The green building provisions are categorised as Mandatory provisions and Optional provisions.
The mandatory provisions shall be applicable to new buildings and existing buildings as follows;
(a) New Buildings – The provisions of this Chapter and elsewhere in these Byelaws shall be applicable.
(b) Existing Buildings
(i) Buildings for which condition for making green building provisions, in the building licence or in the NOC / Clearance given by MOEF / KSPCB were imposed-
All such provisions imposed shall be made within 6 months from the date of coming into force of these Bye-laws.
The optional provisions are additional provisions over and above the mandatory provisions to achieve better green rating for the buildings, both existing and new.
In case owners of properties desire to procure green building ratings from one or more rating bodies, they may suitably incorporate the additional provisions as notified by the Government for the additional incentives offered therein.
The green building mandatory provisions for new buildings on various plot sizes and construction areas are indicated in the table 11.1
| Plot Category | Applicable plot area (Sq.m) | Applicable construction area (Sq.m) | Provisions for Residential | Provisions for Non-Residential |
| I | Upto 100 | Any extent | 4(a) | 4(a) |
| II | Above 100 upto 250 | Above 100 | 1(a), 4(a) | 1(a), 4(a) |
| III | 251 to 500 | 101 to 250 | 1(a), 4(a) | 1(a), 4(a) |
| 251 to 500 | 1(a),1(b), 2(a),4(a) | 1(a), 4(a) | ||
| Above 500 | 1(a), 1(b),2(a),4(a) | 1(a),1(b),2(a), 4(a) | ||
| II | 501 to 1000 | 101 to 250 | 1(a), 4(a) | 1(a),4(a) |
| 251 to 500 | 1(a),1(b), 1(d),2(a), 4(a) | 1(a),1(d),2(a), 4(a) | ||
| 501 to 1000 | 1(a),1(b), 1(d),2(a), 4(a) | 1(a), 1(b), 1(d), 2(a), 4(a) | ||
| Above 1000 | 1(a), 1(b), 1(d), 2(a),3(a), 3(c),4(a) | 1(a),1(b),1(d), 2(a),3(a), 3(c), 4(a) | ||
| III | Above 1000 | 101 to 250 | 1(a), 4(a) | 1(a), 4(a) |
11.2 Provisions for Sanction of new buildings
1. Water Conservation and Management
(a) Rain Water Harvesting (as detailed in Chapter 10 and as notified by the Government)
(b) Low Water Consumption Plumbing Fixtures (as notified by the Government)
(c) Waste Water Recycle and Reuse (as notified by the Government)
(d) Reduction of Hardscape (detailed at Clause 11.2.1)
2. Solar Energy Utilization
(a) Installation of Solar Assisted Water Heating Systems (detailed at Clause 11.2.4)
(b) Installation of Solar Photovoltaic Panels (detailed at Clause 11.2.3)
- Energy Efficiency (Concept of passive solar design of buildings
(a) Low Energy Consumption Electrical Fixtures (Electrical Appliances – BEE Star and Energy Efficient Appliances) (as notified by the Government)
(b) Energy Efficiency in High Voltage Air Conditioner (HVAC) systems. (as notified by the Government)
(c) Lighting of Common areas by LED devices. (as notified by the Government)
4. Waste Management
(a) Segregation of Waste (as notified by the Government)
(b) Organic Waste Management (as notified by the Government)
(c) Construction and demolition waste management (as notified by the Government)
11.2.1 Provision for Site level greening
In alignment with National Sustainable Habitat Mission, the Authority shall encourage augmentation of green cover in the plot, by following:
The Urban Greening Guidelines, 2014 and other provisions as given below –
(a) Provision of minimum 1 tree / every 80Sq.m of plot area for plot sizes >100Sq.m and planted within the setback of the plot.
(b) Compensatory Plantation for felled/transplanted tress in the ratio 1:3 within the premises under consideration
(c) Choice of species for plantation in site and abutting the road to be adopted as per Section 8 of the Urban Green Guidelines, 2014.
(d) The unpaved area shall be more than or equal to 20% of the open spaces provided.
11.2.2 Water Re-use and Recycling
The recycled water shall be used for flushing, HVAC, cleaning of non-living areas and horticultural purposes.
11.2.3 Roof Top Solar Energy Installations
Roof top photovoltaic power station, or rooftop PV system, is a photovoltaic system that has its electricity-generating solar panels mounted on the rooftop of residential or commercial buildings. The various components of such a system include photovoltaic modules, mounting systems, cables, solar inverters and other electrical accessories. Rooftop PV systems are faster than other types of renewable power plants. They’re clean, quiet, and visually unobtrusive.
11.3 Various Guidelines for Green Rating System
The Government shall notify separate Green Rating systems for buildings by selectively combining/adopting/amending the provisions between the following guidelines:
(1) IGBC guidelines by the Confederation of Indian Industries.
(2) GRIHA guidelines by the Ministry of New and Renewable Energy, GoI. In pursuance of the National Sustainable Habitat Mission on Energy Efficiency in Buildings, the Authority shall encourage the provisions of the following Energy efficiency guidelines by certain mandatory provisions and incentives-
(3) ECBC guidelines prepared by Bureau of Energy Efficiency, Ministry of Power GoI
(4) Model Energy Efficiency guidelines. (NSMH Sub report by Bureau of Energy Efficiency).