Main building - The plinth or any part of a building of out house shall be so located with respect to surrounding ground level that adequate drainage of the site is assured but height shall not be less than 30 cm. above the surrounding ground level. In areas subject to flooding, the height of the plinth shall be at least 60 cm. above the high flood level.

Interior Courtyards - Every interior Courtyard shall be raised at least 15 cm. above the surrounding ground level and shall be satisfactorily drained.

Size - No habitable room shall have a carpet area of less than 9.50 sq. m. except those in the hostels attached to recognized educational institutions, the minimum size of a habitable room for the residence of a single person shall be 7.5 sq. m. ; the minimum width of a habitable room shall be 2.4 m. One full side of a habitable room shall abut on the open space. Where there are more than one room, one shall be not less than 9.5 m² and other 7.5 m².

The size of the room in a single room tenement shall not be less than 12.5 sq. m. with a minimum width of 2.4 m.

Height - The height of all rooms for human habitation shall not be less than 2.75 m. measured from the surface of the floor to the lowest point of the ceiling (bottom of slab). The minimum clear head room under beam shall be 2.4 m. In case of centrally air conditioned building, height of the habitable room shall not be less than 2.4 m. measured from the surface of the floor to the underside of the false ceiling.

In the case of pitched roof the average height shall not be less than 2.75 m. and the minimum height at eaves level shall not be less than 2.1 m.

However, the maximum room height shall be 4.2 m. in case of all buildings excepting Residential Hotels of the category of 3 star and above, Assembly, Institutional, Educational, Industrial, Hazardous and Storage occupancies, and in case of portions common to two floors of duplex flats.

Duplex fiats shall mean a residential flat divided on two floors with an internal staircase connecting the two floors.

Height of room for I. T. E. for any telematic equipment storage equipment storage erection facility can have a height as required for effective functioning of that system.

Size - The area of the kitchen shall not be less than 5.5 sq. m. with a minimum width of 1.8 m.

In the case of special housing scheme no provision for kitchen is necessary. In the case of double room tenements, the size of kitchen shall be not less than 4.0 sq. m. with a minimum width of 1.5 m. where alcoves (a coocking space having direct access from the main room without any inter-communicating door) are provided, the size shall not be less than 3.0 sq. m. with a minimum width of 1.5 m.

Height - The room height of a kitchen measured from the surface of the floor to the lowest point in the ceiling (bottom of slab) shall not be less than 2.75 m.

Other Requirements - Every room to be used as kitchen shall have-

• >Means for the washing of kitchen utensils which shall lead directly or through a sink to grated and trappedconnection to the waste pipe;
• Impermeable floor.
• Window of not less than 1.0 sq. m. area, opening directly onto an interior or exterior open space, but not into a shaft.
• In case multi-storeyed residential buildings more than 15. m. in height, refuse chutes.

Size - The minimum size of bath rooms and water closets shall be as under-

Height - The Height of a bathroom or water closet measured from the surface of the floor to the lowest point in the ceiling (bottom of slab) shall be not less than 2.1 m.

Other Requirements - Every bath room or water closet Shall-

1. be so situated that at least one of its wall shall open to external air with the size of opening (windows,ventilators, lauvres) not less than 0.3 sq. m. in area and side not less than 0.3 m.;
2. have the platform or seat made of water tight not absorbent material;
3. be enclosed by walls or partitions and the surface of every such wall or partitions shall be finished with asmooth impervious material to a height of not less than 1 m. above the floor of such a room; and
4. be provided with an impervious floor covering, slopping towards the drain with a suitable grade and not towards verandah or any other room.

No room containing water closets shall be used for any purpose except as a lavatory and no such room shall open directly into any kitchen or cooking space by a door, window or other opening. Every room containing water closet shall have a door completely closing the entrance to it.

The maximum depth of a loft shall be 1.5 m. and the loft may be provided, over residential kitchens, bath room, corridors and over shop floor, built up to an area 25 per cent over kitchens and full space of bath rooms, water closets corridors. In shops lofts of 33 1/3% of the covered area may be provided. However loft will not be allowed where mezzanine floor is provided.

The clear head room under loft shall not be less than 2.1 m.

Loft in commercial areas and industrial buildings shall be located 2 m. away from the entrance.

Size - A ledge or Tand in a habitable room shall not cover more than 25 per cent of the area of the floor on which it is constructed and shall not interfere with the ventilation of the room under any circumstances.

Height - The ledge shall be provided at minimum height of 2.1 m.

The projections (cantilever) of cupboards and shelves may be permitted and would be exempted from covered area calculations. Such projections may project upto 23 cm., in the set backs for residential buildings provided the width of such cupboard/shelves does not exceed 2.4 m. and there is not more than one such cupboard/ shelf in each room provided such projection shall be 2 m. from plot boundary.

Size - The aggregate area of the mezzanine floor shall not exceed 50% of the built up area of that floor. The minimum size of a mezzanine floor if it is used as a habitable room shall not be less than 9.5 m².
  Note - Mezzanine floor area shall be counted towards F. S. I.

Height - The minimum height of a mezzanine floor shall be 2.2m. The head room under mezzanine room shall not be less than 2.20 m.

Other Requirements - A mezzanine floor may be permitted over a room or a compartment provided that-

1. It confirms to the standards of habitable rooms as regards lighting and ventilation, in case the size of mezzanine floor is 9.5 sq. m. or above;
2. It is so constructed as not to interfere under any circumstances with the ventilation of the space over and under it;
3. Such mezzanine floor or any part of it shall not be used as a kitchen;
4. In no case a mezzanine floor shall be closed so as to make it liable to be converted into unventilated compartments.

Size - The floor area of a store room in a residential buildings, where light ventilation and height are provided at special standards lower than as required for living rooms shall not be more than 3 sq. m.

Height - The height of a store room shall not be less than 2.2 m.

 - The area of parking lock up garage shall be included in F. S. I. calculations. However, the built- up area of one garage per residential plot or one garage per plot area of 500 sq. m. (5000 sq. ft.) in other zones shall not be taken into consideration for the purpose of calculating maximum allowable ground coverage.

Garage, Private - The size of a private garage in residential building shall be not less than 2.5 m. X 5 m. and not more than 3 m. X 6 m. The garage, if located in the side open space shall not be constructed within 1.5 m. from the main building.

Garage, Public - Parking places in public buildings open from all sides and having only roofs at top shall be exempted both from built-up area and F. S. I. calculations.

Height - The minimum head room in a garage and parking area shall be 2.4 m.

The plinth of garage located at ground level shall not be less than 15 cm. above the surrounding ground level.

The garage shall be set back behind the building line for the street/road on to which the plot abut, and shall not be located affecting the access ways to the building.

Corner Site - When the site fronts on two streets, the frontage would be as on the street having the larger width. In case where the two streets are of the same width, then the larger depth of the site will decide the frontage and and open space. In such cases the location of a garage (in a corner plot) if provided within the open spaces shall be located diagonally opposite the point of intersections.

The roof of a building shall be so constructed or framed as to permit effectual drainage of the rain water there from by means of sufficient rain water pipes of adequate size, wherever required, so arranged, jointed and fixed as to ensure that the rain water is carried away from the building without causing dampness in any part of the wall or foundations of the building or those of an adjacent building.

The authority may require rain water pipes to be connected to a storm water drain or sewere through a covered channel formed beneath the public footpath or in any other approved manner.

Rain water pipes shall be affixed to the outside of the walls of the building or in recessed or chases cut or formed in such walls or in such other manner as may be approved by the Authority.

Terrace of a building shall not be sub-divided and it shall have only common access.

Basement may be put to only the following uses to be constructed within the prescribed setbacks and prescribed building line and subject to maximum coverage on ground floor.

(i) Following user shall be permitted free of F. S. I.

1. Air conditioning equipment and other machine used for services and utilities of the building; and
2. Parking spaces;
   (i) Following user shall be computed in F. S. I.
3. Storage of house hold or other goods of ordinarily non combustible material and storage incidental to principal user;
4. Strong room, bank cellars etc;
5. Area and extent - The total area of any basement shall not exceed the plinth area of the building. It may be in one level to two.

The basement shall to be used for residential or any habitable purposes and industrial or hazardous use. The basement shall have the following requirements.-

1. Every basement shall be in every part at least 2.4m. in height from the floor to the under side of the roof slab or ceiling.
2. Adequate ventilation shall be provided for the basement. The standard of ventilation shall be the same as required by the particular occupancy according to regulation. Any deficiency may be met by providing in addition adequate mechanical ventilation in the form of blowers, exhaust fans, air conditioning systems etc;
3. The minimum height of the ceiling of any basement shall be 0.9 mtr. and maximum of 1.2 mtr. above the average surrounding ground level;
4. Adequate arrangement shall be made such that surface drainage does net enter the basement;
5. The walls and floor of the basement shall be water-tight and be so designed that the effect of the surrounding soil and moisture, if any, are taken into account in design and adequate damp proofing treatment is given;
6. The access to the basement shall be separate from the main and alternate staircase providing access and exit from higher floors. Where the stair case is continuous in case of building a served by more than one stair case, .the same shall be of enclosed type serving as a fire separation from the basement floor and higher floors (see (n)). Open ramps shall be permitted if they are constructed within the building line subject to the provision of (d).

The minimum aggregate area of opening of habitable rooms and kitchens excluding doors, shall be not less than 1/10 of floor area.

No portion of a room shall be assumed to be lighted if it is more than 7.6m. from the opening assumed for lighting/ventilation of the portion.

Where the lighting and ventilation requirements are not met through day lighting and natural ventilation, the same shall be ensured through artificial lighting and mechanical ventilation as per latest version of part VIll building Services Section I Lighting and Ventilation of National Building Code of India published by the Indian Standards Institution. In the case of special types of buildings requiring artificial lighting and air-conditioning for special types of manufacturing or other process the requirements about natural day lighting and ventilation may be relaxed.

Ventilation Shaft - For ventilating the space for water closets and bath room, if not opening on the front/side, open on the ventilation shaft, the size of which shall not be less than the values given below :

In residential lodging hotels where attached toilets are provided with mechanical ventilation system installed the size of ventilation shaft may be relaxed by the Authority.

Parapet walls and handrails provided on the edges of roof terraces, balcony etc. shall not be less than 1.05 m. and not more than 1.20 m. in height.

Wells, intended to supply of water or human consumption or domestic purposes where provided, shall comply with the requirements.

Location - The well shall be located :

1. Not less than 15 m. from soak pit, refuse pit, earth closet or privy and shall be located on a side upwards, from the earth closet or privy.
2. Not less than 18 m. from any cess pit, soakway or borehole latrine and shall be located on a site upwards from the earth closet or privy;
3. That contamination by the movement of sub soil or other water is unlikely; and
4. Not under a tree or otherwise it should have a canopy over it so that leaves and twigs do not fall into the well and rot.

Requirements - The wall shall :

1. Have minimum internal diameter of not less than 1 m;
2. Be constructed to a height not less than 1 m. above the surrounding ground level, to Corn a parapet or kerb and to prevent surface water from following into a well, and shall be surrounded with a paving constructed of impervious material which shall extend for a distance of not less than 1.8 m. in every direction from the parapet or the kerb forming the well head and the upper surface for such paving shall be sloped away from the well;
3. Be a sound and permanent construction (PUCCA) throughout;
4. The interior surface of the lining or walls of the well shall be rendered impervious for a depth of not less than 1.8 m. measured from the level of the ground immediately adjoining the well-head .

Where a septic tank is used for sewage disposal, the location, design and construction of the septic tank shall conform to requirements.

Location of Septic Tanks and sub surface Absorption system - A subsoil dispersion system shall not be closer than 12.00 of any source of drinking water, such as well to mitigate the possibility of bacterial pollution to water supply. lt shall also be as far removed from the nearest habitable building as economically feasible but not closer than 6 m. to avoid damage to the structures.

Requirements -

1. Dimensions of Septic Tanks - Septic tanks shall have minimum width of 75 cm., minimum depth of one mater below the water level and a minimum liquid capacity of one cubic meter. Length of tanks shall be 2 to 4 times the width;
2. Septic tanks may be constructed of brick work stone masonry concrete or other suitable materials as approved by the Authority;
3. Under no circumstances should effluent from a septic tank, be allowed into an open channel drain or body of water without adequate treatment;
4. Minimum nominal diameter of pipe shall be 100 mm. further, at junctions of pipes in manholes, direction of flow from a branch connection should not make an angle exceeding 45 degree with the direction of flow in the main pipe;
5. The gradients of land drains, under drainage as well as the bottom of dispersion trenches and soakways should be between 1:300 and 1:400
6. Every septic tank shall be provided, with ventilating pipe of at least 50 mm diameter. The top of the pipe shall be provided with a suitable cage of mosquito proof wire mesh. The ventilating pipe shall extend to a height which would cause no smell nuisance to any building in the area. Generally, the ventilating pipe may extend to a height of about 2m. when the septic tank is at least 15 m. away from the nearest building and to a height of 2 m. above the top of the building when it is located closer than 15 m.;
7. When the disposal of septic tank effluent is to seepage pit, the seepage pit may be of any suitable shape with the least cross sectional dimension of 90 cm. and not less than 100 cm. in depth below the invert level of the inlet pips. The pit may be lined with stone, brick or concrete blocks with dry open joints which should be backed with at least 7.5 cm. of clean coarse aggregate. The lining above the inlet level should be finished with mortar. In the case of pits of large dimensions, the top portion may be narrowed to reduce the size of the RCC cover slabs. Where no lining is used, specially near trees, the entire pit should be filled with loose stones. A masonry ring may be constructed at the top of pit to prevent damage by flooding of the pit by surface run off. The inlet pipe may be taken down a depth of 90 cm. from the top as an anti mosquito measure and;
8. When the disposal of septic tank effluent is to a dispersion trench, the dispersion trench shall be 50 to100 cm. deep and 30 to 100 cm. wide excavated to a slight gradient and shall be provided with 15 to 25 cm. of washed gravel of crushed stones. Open jointed pipes placed inside the trench shall be made of unglazed earthenware clay or concrete and shall have minimum internal diameter of 75 to100 mm. Each dispersion trench should not be longer than 30 m. and trenches should not be placed closer than 1.8 m.

Septic Tank Requirements - Requirements specified by State and Central Government, Public Health Institutes such as NEERI, for modern methods of disposal, may also be permissible.

1. Except with the special permission of the Authority the maximum height of the compound wall shall be 1.5 m. above the centre line of the front street. Compound wall upto 2.4 m. height may be permitted to the top 0.9m. is of open type construction of a design to be approved by the Authority.
2. In case of corner plot the height of boundary wall shall be restricted to 0.75 m. for a length of 1 0 m. on the front and side of the intersections and balance height of 0.75 m. if required in accordance with (a) may be made up of open construction (through railings) and of design to be approved by the Authority; and
3. However, the provisions of (a) and (b) are not applicable to boundary wall of jails. In industrial buildings, electric sub stations, transformer stations institutional buildings like sanitoria, hospitals, industrial buildings like workshops, factories and educational buildings like schools, colleges, including the hostels, and other uses of public utility undertakings height upto 2.4 m, may he permitted by the Authority.
4. The compound gate should open entirely inside the property and shall not open on any access/pathway/ road/street.

In the case of multistoried multifamily dwelling apartments constructed by existing and proposed co-operative Housing Societies or Apartment Owners Association Limited Companies proposed societies, an office cum letter box room of dimension 3.6 M. x 3 m. shall be provided on the ground floor under stilts.

Meter room size shall be minimum of 3.00 x 5.00 m. Depending upon the requirement the size shall be increased in consultation with M. S. E. B.

The spaces for provision of transformers shall be provided devoid of clear side marginal distances to be provided as per rules.

Chimneys, where provided shall conform the requirements of IS : 145-1960.

The Chimneys shall be built at least 0.9 m. above flat roofs provided the top of the chimneys shall not be below the roofs, provided the top of the chimneys shall not be below the top of adjacent parapet wall. In the case of sloping roofs, the chimney top shall not be less than 0.6 m. above the ridge of the roof in which the chimney penetrates.

The size of a cabin shall not be less than 3.0 sq. m. The clear passages within the divided space of any floor shall not be less than 0.75 m. and the distance from the farthest space in a cabin to any exit shall not be more than 18.5m. ln case the subdivided cabin does not derive direct lighting and ventilation from any open space/mechanical means, the maximum height of the cabin shall be 2.2 m.