country-india

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country-india

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India-specific architectural code and regulatory reference. Covers the National Building Code of India (NBC 2016), Energy Conservation Building Code (ECBC 2017) and ECBC for Residential Buildings (ECBC-R 2018, also called Eco-Niwas Samhita), Indian Standards for structural design (IS 456:2000 concrete, IS 800:2007 steel, IS 875 Parts 1-5 loads, IS 1893:2016 seismic, IS 13920:2016 ductile detailing, IS 1904 foundations), the Rights of Persons with Disabilities Act 2016 and Harmonised Guidelines & Space Standards for Universal Accessibility 2021 (MoHUA), state-level Development Control Regulations (Mumbai DCPR 2034, Delhi MPD 2041, Bangalore BBMP, Chennai CMDA, Hyderabad GHMC, Kolkata KMC, Pune PMC, Ahmedabad AUDA), municipal building bye-laws, GRIHA and IGBC green rating systems, RERA (Real Estate Regulatory Authority) under the RERA Act 2016, fire safety per NBC Part 4 and state fire services rules, and the approval workflow involving Municipal Corporations, Development Authorities, State Fire Services NOC, and aviation/environmental clearances. Practitioner-grade clause-level reference for design teams working on projects in any Indian state or Union Territory.

Country: India

Architectural code and regulatory reference for projects located in any Indian state or Union Territory. Activate this skill whenever the project location is in India, when an Indian city is referenced, when Indian rupee currency or area-units like "square feet built-up" / "carpet area" / "lakh" / "crore" appear, or when codes like NBC, ECBC, or IS series are mentioned.

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1. Regulatory Hierarchy

India operates as Archetype B (National Model + State Adoption), with significant deviation between national framework and state/municipal enforcement.

1.1 Authority Stack

LEVEL 1 -- NATIONAL FRAMEWORK (advisory, except where state has adopted)
  - Bureau of Indian Standards (BIS) -- publishes NBC 2016 + IS codes
  - Ministry of Housing and Urban Affairs (MoHUA) -- urban policy
  - Bureau of Energy Efficiency (BEE) -- ECBC 2017, ECBC-R 2018
  - Ministry of Environment, Forest and Climate Change (MoEFCC) -- EIA notifications
  - National Disaster Management Authority (NDMA) -- guidelines
  - Directorate General of Civil Aviation (DGCA) -- height NOC near aerodromes

LEVEL 2 -- STATE FRAMEWORK (legally binding)
  - State Town & Country Planning Department -- planning laws
  - State Fire Services -- Fire NOC, periodic renewal
  - State Pollution Control Board -- Consent to Establish/Operate
  - State Electricity Regulatory Commission -- electrical sanction

LEVEL 3 -- LOCAL FRAMEWORK (legally binding, project-specific)
  - Municipal Corporation OR Development Authority -- Building Permit
    + MCGM (Greater Mumbai), MCD (Delhi), BBMP (Bangalore), GCC (Chennai),
      GHMC (Hyderabad), KMC (Kolkata), PMC (Pune), AMC (Ahmedabad),
      MCC (Chandigarh), etc.
    + MMRDA, DDA, BDA, CMDA, HMDA, KMDA -- jurisdictional Development Authorities
  - District Magistrate / Collector -- land use, NA conversion
  - Local Fire Services -- on-site NOC

LEVEL 4 -- PROJECT-SPECIFIC CLEARANCES
  - EC (Environmental Clearance) for >20,000 sqm built-up (EIA 2006 + amendments)
  - Aviation NOC if within 20-km of aerodrome reference point
  - Heritage NOC if within heritage precinct (ASI/SHA)
  - Coastal Regulation Zone (CRZ) clearance per CRZ 2019
  - Forest clearance if on forest land
  - Defence/Army NOC if within designated zones
  - RERA registration if >500 sqm or >8 apartments (RERA Act 2016)

1.2 NBC 2016 Status

The National Building Code of India 2016 (NBC 2016, BIS SP 7:2016, two volumes, ~3,500 pages) is advisory at the national level. It becomes binding only when:

• A state government formally adopts it (most have, fully or partially)
• A municipal corporation references it in its Building Bye-Laws (most major cities do)
• A specific clause is cited in a court order or RERA ruling

NBC 2016 is organized in 12 Parts (P1 to P12), with several Parts subdivided into Sections:

Part	Title	Content
Part 1	Definitions	Glossary, references
Part 2	Administration	Permit process, sanctioning authority duties
Part 3	Development Control Rules + General Building Requirements	Setbacks, FAR, open spaces, common requirements
Part 4	Fire and Life Safety	Compartmentation, exits, fire ratings, sprinklers (the most-cited Part)
Part 5	Building Materials	IS-spec material requirements
Part 6	Structural Design	Section 1 Loads; 2 Soils & Foundations; 3 Timber; 4 Masonry; 5 Concrete; 6 Steel; 7 Prefab; 8 Glass
Part 7	Construction Management, Practices and Safety	Site safety, scaffolding, demolition
Part 8	Building Services	Section 1 Lighting; 2 Electrical; 3 Air-conditioning; 4 Acoustics; 5 Plumbing/Drainage; 6 Lifts/Escalators
Part 9	Plumbing Services	Section 1 Water Supply; 2 Drainage; 3 Solid Waste; 4 Gas Supply
Part 10	Landscape, Signs and Outdoor Display	Streetscape requirements
Part 11	Approach to Sustainability	NBC's sustainability framework (predates GRIHA mandate)
Part 12	Asset and Facility Management	Operations & maintenance

1.3 Code Adoption Status by State

State / UT	NBC 2016 Adoption	ECBC 2017 Mandated	Notes
Maharashtra	Full (UDCPR 2020)	Yes, since 2018	Mumbai uses MCGM DCPR 2034; rest of state uses Unified DCPR 2020
Delhi NCT	Full via MPD 2041 + Building Bye-Laws 2016	Yes, since 2017	DDA/MCD apply NBC + DUAC review for heritage areas
Karnataka	Full via KMBBL 2003 (updated)	Yes, since 2018	Bangalore zoning regs under BDA + BBMP bye-laws
Tamil Nadu	Full via TNCDBR 2019	Yes, since 2018	Chennai under CMDA Master Plan-II + TN Combined DCR & Building Rules 2019
Telangana	Full via GO 168/2012 + updates	Yes, since 2017	HMDA / GHMC bye-laws + 2020 amendments
Andhra Pradesh	Full via APBBR 2017 + 2020 amendments	Yes	APCRDA for Amaravati / VMRDA Vizag
West Bengal	Full via KMC Building Rules 2009 + amendments	Yes, since 2019	Kolkata under KMC + KMDA; rest of state under state PWD rules
Gujarat	Full via GDCR 2017 (Comprehensive General Development Control Regulations)	Yes, since 2018	Ahmedabad AUDA, Surat SUDA, Vadodara VUDA
Rajasthan	Full via Rajasthan Building Bye-Laws 2020	Yes	JDA for Jaipur, AUIT for Ajmer, JODA for Jodhpur
Uttar Pradesh	Full via UPABBR 2008 + amendments	Yes, since 2018	Lucknow LDA, NOIDA, Greater NOIDA Authorities
Kerala	Full via KMBR/KPBR 2019 (revised 2024)	Yes, since 2019	Local Self Government Department supervises
Punjab	Full via PMBBR 2018	Yes	Each Municipal Corporation has variation
Haryana	Full via HBC 2017 + 2019 amendments	Yes, since 2017	HUDA / HSVP for new sectors, GMDA for Gurugram
Madhya Pradesh	Full via MPBBL 2012 + amendments	Yes	TPS schemes prevail in larger cities
Bihar	Partial; State Building Bye-Laws 2014	Partial (large commercial only)	BMC Patna; older infrastructure
Odisha	Full via OBBL 2018	Yes, since 2019	BDA Bhubaneswar, CDA Cuttack
Assam	Partial; ABBL 2014	Limited	GMDA Guwahati; northeastern states often follow Assam by reference
All NE States	Variable; most defer to NBC + Assam pattern	Limited	Variable adoption
Jammu & Kashmir	Reorganised 2019; JK Building Bye-Laws under revision	--	UT administration; J&K Master Plan 2035 in force
Chandigarh UT	Chandigarh Building Rules (Urban) 2017	Yes	Le Corbusier zoning preserved
Goa	GTCP Act 1974 + Regulations 2010 + 2020 amendments	Partial	Coastal restrictions paramount

When advising on a specific project, always confirm: (i) which state, (ii) which city's Municipal Corporation or Development Authority, (iii) date of pending Building Permit application (as code version in force depends on application date).

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2. Building Code Core Requirements (NBC 2016 Part 3 + Part 4)

2.1 Occupancy Classification (NBC 2016 Part 4, 3.1)

NBC defines 9 Occupancy Groups (A through I):

Group	Occupancy	Subdivisions	Examples
A	Residential	A-1 Lodging; A-2 One-family/Two-family; A-3 Dormitories; A-4 Apartment houses; A-5 Hotels; A-6 Starred Hotels	Apartments, hostels, hotels
B	Educational	B-1 Schools up to senior secondary; B-2 All others (colleges, universities)	Schools, colleges
C	Institutional	C-1 Hospitals/sanatoria; C-2 Custodial institutions; C-3 Penal institutions	Hospitals, jails, orphanages
D	Assembly	D-1 (>1000 persons); D-2 (>300, <=1000); D-3 (>100, <=300); D-4 (<=100); D-5 Outdoor assembly; D-6 Cinemas/theatres; D-7 Stadia	Theatres, halls, marriage halls
E	Business	E-1 Offices; E-2 Laboratories; E-3 Research; E-4 Tele-call centres	Offices, IT parks
F	Mercantile	F-1 Retail (small); F-2 Wholesale; F-3 Super markets/Department stores	Shops, malls
G	Industrial	G-1 Low hazard; G-2 Moderate; G-3 High hazard	Factories, mills
H	Storage	H-1 (low); H-2 (moderate)	Warehouses
I	Hazardous	(specially regulated)	Chemical plants, magazines, oil/gas

2.2 Height & Area Limits

NBC 2016 has no single height-vs-construction-type table equivalent to IBC Table 504; instead, height/area limits are embedded in Part 4 (Fire), Part 3 (Development), and state DCRs.

Critical thresholds:

Threshold	Trigger	Source
High-Rise Building	>= 15 m height (residential, hotel) OR >= 18 m (other occupancies) -- from average ground level	NBC 2016 Part 4, 3.1.40
Special Building	Group D-1/D-2/D-6 (assembly), Group E factories with hazardous material, Group H, hotels with floor area >500 sqm + height >9 m, hospitals >9 m, schools >9 m, basement >300 sqm	NBC 2016 Part 4, 3.1.84
EIA Threshold	>20,000 sqm built-up area (per EIA Notification 2006 + 2014 amendment + January 2020 amendment) -- Category B2 with State EIA Authority; >150,000 sqm or specific industries -- Category A with national MoEFCC	EIA Notification 2006 (and amendments)
Fire NOC Required	All high-rise buildings, special buildings, hospitals, hotels with >= 20 rooms; some states require below these thresholds too	NBC 2016 Part 4 + state Fire Services rules
RERA Registration	Project on >500 sqm OR >8 apartments	RERA Act 2016 Sec. 3
Aviation NOC	Buildings within 20 km of aerodrome reference point (varies by airport classification)	DGCA NOCAS 2.0 portal; per aircraft operator restrictions

2.3 Setback & FAR (Indicative -- state DCR governs)

FAR (Floor Area Ratio) in India is computed differently across states. Some include balconies/lifts, others exclude. Always confirm with the local DCR.

City	Typical Residential FAR	Typical Commercial FAR	Notes
Mumbai (MCGM DCPR 2034)	Base 1.33, Permissible 3.0 (with premium FSI + TDR), up to 5.0 in TOD	Base 1.33, up to 5.0 with premium	Distinction: "Built-up FSI" vs "Composite FSI"; transit-oriented zones higher
Delhi (MPD 2041 + Unified Building Bye-Laws 2016)	200-350% (varies by plot size); up to 400% mixed-use	200-450%	"FAR" used, includes mezzanine; balconies excluded if <=10%
Bangalore (BBMP Bye-Laws 2003)	1.75 (up to 3.25 for big plots), TDR-augmented	1.75-3.25	RMP 2031 increased FAR with road width
Chennai (CMDA Second Master Plan)	1.5-2.0 (special buildings up to 2.5)	2.0-3.5	Premium FSI 50% extra on payment
Hyderabad (GO 168 + GHMC)	Unlimited (subject to setback + height + insurance), within Master Plan	Unlimited subject to same	Insurance premium based on height
Kolkata (KMC Building Rules 2009)	Varies by ward; 1.5-3.5	2.0-4.0	"FAR" computed on plot area + 25% road area
Pune (Maharashtra UDCPR 2020)	1.1-2.5 base, premium up to 3.5	Same	Aligned with MCGM concept of permissible vs base
Ahmedabad (Gujarat GDCR 2017)	Up to 2.7 (RC), 4.0 (CBD)	Up to 5.0 in CBD/TOD	Aligned with state CGDCR
Gurugram (HBC 2017)	1.45-1.75 (varies by zone)	1.75-3.5	Floor-Area-Ratio + ground coverage limits
NOIDA (UP)	2.75-3.5 (group housing)	4.0 (mixed-use)	NOIDA Building Regulations 2010 + amendments

Indian DCRs typically also limit:

• Ground Coverage (separate from FAR): often 25-50% residential, 50-60% commercial
• Setbacks: front 3-12 m, side 3-6 m, rear 3-6 m (depends on plot size + abutting road)
• Height: implicit via FAR + setback + ground coverage interaction; explicit only for special zones (heritage, aviation, defence)
• Parking: 1.0-2.0 cars per dwelling (city-dependent); commercial = 1 per 50-100 sqm GFA; ECS = Equivalent Car Space

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3. Fire Safety (NBC 2016 Part 4 + IS 15683)

3.1 Travel Distances

NBC 2016 Part 4 Table 7:

Occupancy	Without Sprinkler (m)	With Sprinkler (m)
Group A Residential	22.5	30.0
Group B Educational	22.5	30.0
Group C Institutional	22.5 (limited single-storey)	30.0
Group D Assembly	22.5 (max with smoke detection)	30.0
Group E Business	30.0	45.0
Group F Mercantile	22.5	37.5
Group G Industrial	varies by hazard	varies
Group H Storage	varies	varies
Group I Hazardous	18.0	22.5

(Cross-reference: IBC 2024 allows 76.2 m for sprinklered business. India is significantly more restrictive.)

3.2 Means of Egress -- Stair Capacity (NBC 2016 Part 4, 4.4)

• Minimum stair width -- High-rise residential 1.5 m; Hospital 2.0 m; Educational 2.0 m for assembly capacity >300; Business 1.5 m
• Minimum exit door width -- 1.0 m (residential), 1.5 m (institutional/assembly main exit), 2.0 m (large assembly)
• Maximum dead-end corridor -- 6.0 m (most occupancies), 4.5 m for institutional (Group C)
• Capacity factor -- Stair: 60 persons per unit (one unit width = 500 mm); Doors: 75 persons per unit. So 1.5 m stair = 3 units = 180 persons; 1.0 m door = 2 units = 150 persons.
• Refuge area -- Mandatory on every floor for high-rise residential (Group A) of height >= 24 m; calculated as 0.3 sqm per occupant of upper floors served; located adjacent to fire-escape stair, accessed via 2-hour fire-rated lobby. (Critical: this is a Mumbai/Delhi enforcement priority.)

3.3 Fire Compartmentation

NBC 2016 Part 4 Table 22:

Building Type / Height	Required Fire Rating
Non-high-rise, non-special	2-hour structural, 2-hour compartment walls
High-rise residential (15-45 m)	2-hour
High-rise residential (>45 m)	3-hour
High-rise non-residential (18-45 m)	2-hour
High-rise non-residential (>45 m)	3-hour
Special buildings	4-hour (large assemblies, hospitals)
Basement (>= 2 levels)	4-hour external; sprinklered

Compartment size limits: maximum 750 sqm per compartment in basement; 2,000 sqm above grade for office (E); 1,500 sqm assembly (D); 1,000 sqm hospital (C).

3.4 Sprinkler Requirements

• Mandatory for all High-Rise Buildings >= 15 m (Group A), >= 18 m others
• Mandatory for all Special Buildings regardless of height
• All basements >= 300 sqm
• All hospitals > 9 m height
• All hotels > 15 m height OR > 30 keys

Sprinkler systems are designed per IS 15105:2002 (sprinklers) + TAC (Tariff Advisory Committee) Rules for fire insurance purposes. NFPA 13 is sometimes referenced for fire engineering.

3.5 Fire Lifts (NBC 2016 Part 4, 4.5)

• Required: all high-rise buildings (>15 m residential, >18 m others)
• Minimum 1 fire lift per 1,200 sqm floor area, minimum 2 per building
• Capacity: minimum 545 kg, dimensions per IS 14665
• Speed: 1.0 m/s minimum, to be able to reach top floor in <= 1 minute
• Fire lift lobby: enclosed, 2-hour fire-rated, positive pressurized (50 Pa)
• Communication: dedicated firefighter intercom

3.6 Refuge Floors (High-rise > 24 m, NBC Part 4 4.6.6.4)

• Refuge floor required every 24 m (Mumbai stricter: every 7 floors via DCPR 2034)
• Refuge area: minimum 15 sqm OR 0.3 sqm/person served, whichever larger
• Refuge floor not to be used for any other purpose (no storage, no AHU); fully ventilated to atmosphere

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4. Energy Code

4.1 ECBC 2017 (Commercial)

The Energy Conservation Building Code 2017 (BEE, MoP) applies to:

• Buildings or building complexes with connected load >= 100 kW OR contract demand >= 120 kVA
• Or built-up area >= 500 sqm

It applies to all new commercial buildings in 21 states that have adopted (as of 2025). Aimed at 25-50% reduction over base case.

Three compliance levels:

Level	Energy Savings vs Base	Mark
ECBC	25%	ECBC-compliant
ECBC+	35%	ECBC+
SuperECBC	50%	SuperECBC

Five Climate Zones (ECBC 2017 + IS 3792:1978):

Zone	HDD (base 21C) + CDH (base 25C)	Cities
Hot-Dry	CDH > 6000 K-h, HDD low	Ahmedabad, Jaipur, Nagpur, Jodhpur
Warm-Humid	High humidity (>= 75%), CDH > 6000	Mumbai, Chennai, Kolkata, Goa, Vizag
Composite	Mixed extremes	Delhi, Lucknow, Kanpur, Allahabad
Temperate	Moderate temperatures year-round	Bangalore, Pune, Hyderabad (margin), Coimbatore
Cold	HDD > 3000	Shimla, Srinagar, Leh, Gangtok, Darjeeling

ECBC 2017 prescriptive U-value targets (W/m2K):

Element	Hot-Dry	Warm-Humid	Composite	Temperate	Cold
Roof (24-hr use)	0.33	0.33	0.33	0.33	0.33
Wall (24-hr use)	0.40	0.40	0.40	0.40	0.40
Wall (daytime use)	0.85	0.85	0.85	0.85	0.55
Glass U-factor (max)	3.0	3.0	3.0	3.0	3.0
Glass SHGC (max, WWR <= 40%)	0.27	0.27	0.27	0.27	0.62 (heating)

(ECBC+ and SuperECBC tighten these. Cold zone allows higher SHGC for solar heating.)

4.2 ECBC-R 2018 / Eco-Niwas Samhita

Applies to residential buildings. Two parts:

• Part 1 (ENS 2018): Building envelope -- defines RETV (Residential Envelope Transmittance Value) target by climate zone
• Part 2 (ENS 2021): Electro-mechanical systems

RETV targets:

Climate Zone	RETV Limit (W/m2)
Composite	15
Hot-Dry	15
Warm-Humid	15
Temperate	15
Cold	-- (U-thermal transmittance limit instead: Uroof <= 1.2, Uwall <= 1.8)

4.3 Green Building Ratings

System	Operator	Building Types	Levels
GRIHA (Green Rating for Integrated Habitat Assessment)	TERI + MNRE	New construction, large built-up	1-5 star
GRIHA SVA Griha	Same	Small homes (<= 2,500 sqm)	--
GRIHA EB	Same	Existing buildings	--
IGBC LEED India	CII Indian Green Building Council	All types	Certified / Silver / Gold / Platinum
IGBC Green New Buildings	Same	India-specific frame	Same
EDGE	IFC (World Bank)	Affordable / SME	Certified / Advanced / Zero Carbon
LEED v4.1	USGBC (international)	All	Certified / Silver / Gold / Platinum

GRIHA is mandatory for all CPWD (Central Public Works Department) projects since 2014. Many State PWDs follow.

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5. Accessibility

5.1 Statutory Framework

• Rights of Persons with Disabilities Act 2016 (RPwD Act) -- supersedes 1995 PwD Act. Schedule defines 21 disability categories. Section 44-46 mandate accessibility in built environment.
• Accessibility Code of India -- not a single document; combines RPwD Act + Harmonised Guidelines + NBC 2016 Part 3 (3.10).
• Harmonised Guidelines and Space Standards for Universal Accessibility 2021 (MoHUA, replaces 2016 Harmonised Guidelines) -- detailed dimensional standards; refer to this as the primary technical reference.
• CPWD Manual for Barrier-Free Built Environment 2014 (updated) -- for central government buildings.

5.2 Key Dimensional Requirements (Harmonised Guidelines 2021)

Element	Required Dimension
Accessible route width	1.2 m clear (1.5 m preferred); passing space at 60 m intervals
Door clear width	900 mm minimum (entrance); 850 mm internal
Ramp gradient	Max 1:12 for 760 mm rise; 1:15 preferred; 1:20 for tactile contrast required
Ramp landing	1.5 x 1.5 m at top/bottom; intermediate at every 9.0 m horizontal
Lift cabin	Minimum 1100 mm wide x 1300 mm deep (one wheelchair + attendant); for hospitals 1100 x 2100 mm (stretcher access)
Lift door	900 mm clear
Accessible WC	1.5 m x 2.2 m minimum; 1.5 m turning circle; grab rails at 850 mm AFL
Accessible parking	3.6 m x 4.8 m + 1.2 m access aisle
Signage	Tactile + Braille; high contrast (>= 70% LRV difference); height 1.2-1.6 m for reading
Tactile flooring	At all level changes, doorways, ramps, stair edges, lift entries
Counter height	800 mm max for accessible service counters

5.3 Provision Counts (RPwD + Harmonised Guidelines)

• Lifts: All buildings G+1 and above accessible to public; G+2 for residential; G+0 for single-storey assemblies. (RPwD interpretation has tightened this.)
• Accessible WC: 1 per floor minimum; in public buildings 1 per gender per public WC bank + 1 universal
• Accessible parking: 2% of total OR minimum 2 spaces, whichever greater
• Accessible seats in assembly: 2% with companion seat, distributed (not clustered)

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6. Structural Design (IS Codes)

6.1 Loads

Type	Reference Standard
Dead loads	IS 875 (Part 1):1987
Imposed loads	IS 875 (Part 2):1987
Wind loads	IS 875 (Part 3):2015 -- 6 wind zones (33-55 m/s basic wind speed)
Snow loads	IS 875 (Part 4):1987 -- limited applicability
Special loads (impact, vibration etc.)	IS 875 (Part 5):1987
Seismic	IS 1893 (Part 1):2016
Load combinations	IS 875 Pt 5 + IS 1893; aligned to limit state

6.2 Seismic Zoning (IS 1893:2016)

Zone	Zone Factor Z	Intensity (MMVI/MSK)	Cities
II	0.10	VI	Bangalore, Hyderabad, Chennai (margin), Pune, Mumbai, Trivandrum
III	0.16	VII	Mumbai (Greater), Kolkata, Lucknow, Bhubaneswar, Ahmedabad, Surat, Jaipur
IV	0.24	VIII	Delhi, Jammu, Patna, Dehradun, Faridabad, Chandigarh
V	0.36	IX or more	Srinagar, Guwahati, Shillong, Aizawl, Imphal, Port Blair, Kutch (Bhuj), Sikkim

Ductile detailing (IS 13920:2016) mandatory for all buildings in Zone III, IV, V and important structures in II.

6.3 Wind Zoning (IS 875 Part 3:2015)

Wind Zone	Basic Wind Speed Vb (m/s, 50-year return)	Cities
Zone 1	33	Trivandrum, Bangalore, Hyderabad
Zone 2	39	Pune, Mumbai (inland), Chennai (margin)
Zone 3	44	Mumbai (coastal), Kolkata, Delhi (margin)
Zone 4	47	Bhubaneswar, Visakhapatnam
Zone 5	50	Most coastal Tamil Nadu, Andhra coast
Zone 6	55	Cyclone-prone Odisha, AP coast, Bay of Bengal islands

6.4 Material Codes

Material	Code
Plain & Reinforced Concrete	IS 456:2000 (under revision; draft IS 456:2024)
Working stress concrete (where used)	IS 456 Annex N
High-performance concrete	IS 456 + IS 1199 + special provisions
Pre-stressed concrete	IS 1343:2012
Steel general	IS 800:2007 (limit state)
Cold-formed steel	IS 801:1975 + IS 811:1987
Composite	IS 11384:1985
Timber	IS 883:2016 + IS 4983
Masonry	IS 1905:1987
Foundations	IS 1904:1986 (general), IS 6403 (allowable bearing), IS 2950 (raft), IS 2911 (piles, 4 parts)
Aluminium	IS 8147
Glass	IS 16231 (4 parts)
Curtain Wall	IS 17277:2019

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7. Planning, Zoning & Urban Design Layer

7.1 RERA (Real Estate Regulatory Authority)

• RERA Act 2016 -- mandatory registration for any residential/commercial project on plot > 500 sqm OR > 8 apartments
• State RERA authorities (e.g., MahaRERA Maharashtra, KRERA Karnataka, TNRERA Tamil Nadu) enforce
• Carpet Area definition standardized: enclosed walkable area within apartment + internal partition walls, excluding balcony, terrace, utility area, external walls (RERA Sec. 2(k))
• Promoter cannot use undefined area terms ("super built-up", "saleable area") in marketing without disclosure
• 70% of buyer payments held in escrow until completion

7.2 Coastal Regulation Zone (CRZ 2019)

For projects within 500 m of high tide line:

• CRZ-I (ecologically sensitive) -- no construction
• CRZ-II (developed urban) -- existing development controls + FSI limited
• CRZ-III (rural) -- limited; 200 m no-development zone
• CRZ-IV (water bodies) -- restricted activities

7.3 Environmental Clearance (EIA 2006 + amendments)

Threshold	Category	Authority
Built-up >= 20,000 sqm AND <1,50,000 sqm	B2	State EIA Authority (SEIAA)
Built-up >= 1,50,000 sqm	A	MoEFCC (Central) via EAC
Township projects >= 50 hectare OR >= 1,50,000 sqm built-up	A	MoEFCC

Required: Form 1, Form 1A, Conceptual Plan, baseline studies, EIA report (Category A only with public hearing), EMP, EC validity 7 years.

7.4 Aviation NOC (DGCA NOCAS 2.0)

Online portal (nocas2.aai.aero). Required if building exceeds height limits computed from distance to nearest aerodrome:

• Type 1 airport (international, >2,500 m runway): NOC required within 20 km
• Type 2 airport (domestic): within 8.5 km
• Helipad: within 4 km

Height limits use a conical surface (slope varies by airport).

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8. Quick Numeric Reference

Parameter	Value	Source
Floor-to-floor height residential (standard)	3.0 m	NBC Part 4 4.7.3.1 (min 2.75 m clear)
Floor-to-floor height office	3.6 m	ECBC + NBC; min 2.75 m clear
Minimum room size (habitable, residential)	9.5 sqm (single occupancy); 13.93 sqm (family room)	NBC Part 3 4.2
Minimum kitchen size	5.5 sqm	NBC Part 3 4.2.5
Minimum bathroom	1.8 sqm with min dim 1.2 m	NBC Part 3 4.2.5
Minimum balcony depth	0.9 m (varies by state DCR)	Local DCR
Corridor width residential	1.0 m (1.2 m for high-rise)	NBC Part 4 4.4.3
Corridor width hospital	2.4 m	NBC Part 4 + FGI-derived
Corridor width office	1.5 m	NBC Part 4
Stair width residential (high-rise)	1.5 m	NBC Part 4 4.4.3 + 4.5
Stair width hospital	2.0 m	NBC Part 4
Tread/riser comfort	250 mm tread; 175 mm riser (residential); 300/150 institutional	NBC Part 4 4.4.3
Lift capacity (residential, basic)	6-person (408 kg)	NBC Part 8 Sec 6
Lift capacity (high-rise residential)	13-person (884 kg) + fire lift 545 kg	Same
Parking ECS (Equivalent Car Space)	25 sqm (covered including drive); 23 sqm uncovered + 5 sqm circulation	State DCR (varies)
Two-wheeler parking	1.5 sqm per	NBC + local DCR
Bicycle parking (TOD)	Per local DCR; Mumbai DCPR mandates 1 per 100 sqm GFA

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9. Application Workflow

When advising on a project in India:

1. Identify state + city + Municipal Corporation/Development Authority.
2. Check the in-force Building Bye-Laws version. Indian DCRs change frequently (Mumbai DCPR 2034 replaced DCPR 1991; UDCPR 2020 unified Maharashtra; Kerala KMBR 2019 replaced 1999; etc.)
3. Check ECBC adoption status in the state + applicability threshold to the project.
4. Confirm RERA registration requirement (Sec. 3 thresholds).
5. Confirm EIA category based on built-up area (Sec. 7.3 above).
6. Confirm Fire NOC requirement + obtain pre-design Provisional NOC.
7. Confirm Aviation NOC if relevant (DGCA NOCAS 2.0).
8. Confirm CRZ category if coastal site.
9. Apply NBC 2016 for life safety, then DCR for FAR/setback/parking, then ECBC for energy.
10. Cite specific clauses: "NBC 2016 Part 4 Clause 4.4.3", "ECBC 2017 Section 4.3.1.1", "IS 1893:2016 Clause 6.4.2", "Mumbai DCPR 2034 Regulation 33(10)", "MoHUA Harmonised Guidelines 2021 Section 2.5".

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10. State-Specific Critical Notes

Maharashtra / Mumbai (MCGM DCPR 2034)

• Premium FSI purchasable; TDR (Transfer of Development Rights) tradable
• Regulation 33(10) slum redevelopment, 33(7) cessed buildings, 33(9) cluster redevelopment, 33(11) gaothan
• Coastal projects subject to MCZMA + CRZ
• High-rise (>= 70 m) requires High-Rise Committee approval before MCGM permit
• Sanction in stages: IOD (Intimation of Disapproval -- ironic name, it's pre-conditions) -> CC (Commencement Certificate) -> OC (Occupation Certificate)

Delhi NCR

• Unified Building Bye-Laws 2016 (UBBL) applies to most agencies (MCD, NDMC, DDA)
• MPD 2041 governs land use + density
• HCBE (Heritage Conservation Committee) + DUAC (Delhi Urban Arts Commission) review heritage zones and Lutyens' Bungalow Zone
• Gurugram has its own Haryana Building Code 2017 + GMDA
• NOIDA / Greater NOIDA each have separate authority + bye-laws

Karnataka / Bangalore

• BBMP Bye-Laws 2003 + BDA Master Plan RMP 2031 governs Bangalore
• Tier-2 city codes (Mysuru, Mangaluru) follow KMBBL with local amendments
• KSPCB Consent for any project > 1500 sqm

Tamil Nadu / Chennai

• TNCDBR 2019 (Tamil Nadu Combined Development and Building Rules 2019) updated and replaced 2008 + 2010 versions
• Multi-storey: > 4 floors or > 15 m
• CMDA for Chennai metropolitan; DTCP for rest of state

Karnataka / Bangalore vs Telangana / Hyderabad

• Hyderabad has effectively unlimited FAR in many zones subject to setback + insurance premium (GO 168 + amendments)
• TS-bPASS -- Telangana's online single-window planning approval (instant for small plots, 21-day for large)

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11. Authoritative Sources

• Bureau of Indian Standards (BIS) -- bis.gov.in -- NBC 2016 (SP 7), IS codes
• Bureau of Energy Efficiency (BEE) -- beeindia.gov.in -- ECBC 2017, ECBC-R 2018 (Eco-Niwas Samhita)
• Ministry of Housing and Urban Affairs (MoHUA) -- mohua.gov.in -- Harmonised Guidelines 2021
• MoEFCC -- moef.gov.in -- EIA Notifications, CRZ Notifications
• State Town Planning Departments -- portal varies by state
• State Municipal Corporations -- e.g., portal.mcgm.gov.in (Mumbai), mcdonline.nic.in (Delhi), bbmpgov.in (Bangalore), tnchennai.gov.in (Chennai), ghmc.gov.in (Hyderabad)
• State Development Authorities -- mmrda.maharashtra.gov.in (MMRDA), dda.gov.in (DDA), bda.karnataka.gov.in (BDA)
• RERA portals -- maharera.maharashtra.gov.in, rera.karnataka.gov.in, tnrera.in
• GRIHA Council -- grihaindia.org
• IGBC (CII) -- igbc.in

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Cross-references within this plugin: load building-codes for IBC comparison; fire-life-safety for general egress principles; building-sustainability for LEED/Passive House comparison; structural-systems for material-system selection within IS framework; building-envelope for envelope detailing in Indian climate zones.