(a) Dimensions of septic tanks- Septic tanks shall have minimum width of
0.75 m, minimum depth of one metre below water level and a minimum liquid capacity of one cubic metre. Length of tanks shall be 2 to 4 times the width; detail of which is given in Table-3
(b) Septic tanks may be constructed of brickwork, stone masonary concrete or other suitable material as approved by the Authority.
(c) Under no circumstance should effluent from a septic tank be allowed into an open channel, drain or body of water without adequate treatment;
(d) 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;
(e) The gradients of land drains, under drainage as well as the bottom of dispersion trenches and soak ways should be between 1:300 and 1:400.
(f) Every septic tank shall be provided with ventilating pipe of atleast 50 mm diameter. The top of the pipe shall be provided with a suitable cage of-mosquito-proof-wire-mesh.
The ventilation 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 2 m when the septic tank is atleast 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 metres.
(g) When the disposal of septic tank effluent is to 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 pipe.
The pit may be filled with stone, brick or concrete blocks with dry open joins which should be backed with atleast 7.5 cm of clean coarse NEW REVISED BUILDING BYELAWS FOR GUWAHATI METROPOLITAN AREA-2006 Guwahati Metropolitan Dev. Authority Page No. [35] 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 slab, 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 the 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 to as an anti mosquito measure.
(h) When the disposal of septic tank effluent is to a dispersion trench, the dispersion trench shall be 50 to 100 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 or crushed stones. Open jointed pipes placed inside the concrete and shall have minimum internal diameter of 75 to 100 cm. No dispersion trench should be longer than 30 m and trenches should not be placed closer than 1.8 m.
NEW REVISED BUILDING BYELAWS FOR GUWAHATI METROPOLITAN AREA-2006 Guwahati Metropolitan Dev. Authority Page No. [36] Chapter-IV
58. Setback line, yard width, coverage and other particulars will be according to the standards as below:
58.1 MINIMUM PLOTSIZE FOR RESIDENTIAL USE Density Plot Size
(a)
(b)
(c) High Medium Low 15 lessa i.e 200 sq.mt 01 Katha i.e. 268 sq.mt.
01 Katha 05L 335 sq.mt.
However within Guwahati Municipal Corporation area the Authority may allow to relax the provisions regarding plot size with the following conditions on FAR and coverage on appeal before appropriate authority.
High density Minimum plot size 10 Lessa F.A.R. 100 Coverage 50% Medium density Minimum plot size 15 Lessa F.A.R. 125 Coverage 50% for RCC 55% For Assam Type
58.2 MINIMUM WIDTH OF PLOT
(a) Upto 15 Lessa i.e. 200 sq. mt 7.5 mtrs
(b) 15 Lessa to 1 K-10L i.e. 400 sq. mt 10 mtrs
(c) 1K-10L to 2K-10L i.e. 400 sq. mt to 670 sq. mt 11.5 mtrs
(d) More than 2K-10L i.e. 670 sq. mt 12 mtrs
58.3 SETBACK REGULATIONS
(a) Minimum setback of the building or the structure from the prescribed street line-
(i) FRONT SETBACK Every building fronting a street shall have a front space from the prescribed street line forming an integral part of the site as below- NEW REVISED BUILDING BYELAWS FOR GUWAHATI METROPOLITAN AREA-2006 Guwahati Metropolitan Dev. Authority Page No. [37] Width of street fronting the plot as per Master Plan Minimum front open space Height of the building Upto 9.6 Metres*
9.6 to 15.8 Metres* Above 15.8 Metres* Upto 6.6 Metres
3.0 Metres 4.5 Metres 6.0 Metres Upto 15 Metres
3.0 Metres 6.0 Metres 7.5 Metres Above 15 Metres
3.0 Metres 7.5 Metres 9.0 Metres * Assuming 0.6 metre to be the plinth height from the average level of the ground, around and contiguous to the building.
In case of building abutting two or more streets the wider street shall be considered for determining building height and other regulation and setback will be as per CL 36.
Front setback of all categories of building shall be as per 58.3 (i).
(ii) SIDE SETBACK For high density zones side setbacks shall be 1.5 metres.
For medium density zones side setbacks shall be 1.5 mertres For low density zone side setbacks shall be 1.8 metres.
(iii) Rear setback for all density zone shall be 3.0 metres.
(iv) For building above 12 m. additional setback will be required as per Cl. 37 (A) 1.
(v) However for multistoreyed residential buildings all set back norms of multistoreyed apartment will be applicable.
58.4 REGULATIONS FOR APARTMENT BUILDINGS Height of building Minimum plot size Minimum front set back Minimum rear set back Minimum side set back Apartment upto 12 m.
3 K. 4.5 m. 3.6 m. 2.4 m.
Apartment above 12 m. height 4 K. 6 m. 3.6 m. 2.4 m.
Mixed use building of residential apartment and commercial above 15 m.
5 K. 6 m. 3.6 m. 2.4 m.
A plot abutting a street with a width of above 15 metres, the NEW REVISED BUILDING BYELAWS FOR GUWAHATI METROPOLITAN AREA-2006 Guwahati Metropolitan Dev. Authority Page No. [38] minimum front set back shall be calculated according to the width of the abutting street as given in the clause No. 58 (3)(i) The side and rear set backs for buildings above 12 m. will be as per Cl.
37. (A) (i).
58.5 REGULATIONS FOR COMMERCIAL USE IN COMMERCIAL ZONE Minimum plot size -167.4 sq. mtr.
Minimum width of plot - 7.5 m
(i) Setback upto the height of 12 mtr.
Minimum front set back- 3.0 mtrs with 1.5mtr. cantilever in upper floor Minimum side set back- a minimum of 1(one) mtr has to be maintained in each side which can be relaxed to only one side if the adjoining plot owner agrees to have a common wall with his building.
Minimum rear set back upto plot depth of 18 mtrs - 1.5 mtrs.
above plot depth of 18mtrs - 3.0 mtrs with maximum 1.5 mtrs projection on the upper floors.
If any part of the ground floor or any other upper floor is used for residential purpose or for human habitation the side set back of the building shall be as per the high density residential zones.
A plot abutting a street with a width of above 15 mtrs the front setback shall be calculated according to the width of the abutting street as given in the clause no. 58.3(i)
(ii) Additional rear and side setback for a building with a height of above 12 metres.
12 m upto 15 m. –Rear setbak – 3 mtr. & side setback - 1.5 m.
- Side and rear setback should be increased by 0.3 metres for every 1.5 mtres of additional height of the building in addition to the setbacks already prescribed for a building of 15 metres height upto a maximum of 1.5 metres of additional set backs on both rear and sides.
58.6 REGULATIONS FOR WHOLESALE USE IN WHOLESALE COMMERCIAL ZONE Minimum plot size - 670 sq.mtr Minimum plot width - 15 metres Minimum front set back - 6 mtrs.
Maximum height - (a) 15.0 mtr for building of wholesale use
(b) For other building the height will be given as per CL. 37.
NEW REVISED BUILDING BYELAWS FOR GUWAHATI METROPOLITAN AREA-2006 Guwahati Metropolitan Dev. Authority Page No. [39] Minimum side set back - 1.8 mtr on one side and the setback on the other side will be 3.6 mtr Rear Set back - 3.0 mtr.
58.7 REGULATION FOR PUBLIC AND SEMI PUBLIC USE IN PUBLIC AND SEMI PUBLIC ZONE Minimum plot size - 400 sq.mtr.
Minimum setback Front set back - 6.0 metres.
Side & rear - 3.0 metres.
58.8 REGULATION FOR INDUSTRIAL ZONE Light Medium Requirements Area In sq.mtrs.
Width in mtrs Area in sq.
metres Width in metres
(1) Minimum size of plot
744.00 15.5 1800 27.5
(2) Minimum set back of all structure/ building or the structure from the prescribed street line set Front 6.00 Front 9.0
(3) Minimum Rear 6.0 Rear 6.0 Set back side 3.0 side 6.0 If any structure or building is permitted for human habitation under provision of these rule the yard conditions shall be same as prescribbed for medium density residential zone If any structure or building is permitted for human habitation under the provision of these rules the yard conditions shall be same as prescribed for medium density residential zone
(4) Maximum height 15 mtrs
58.9 REQUIREMENTS FOR SPECIAL TYPES OF BUILDINGS (To be applicable for all zones where the particular use is permissible) (A) NURSING HOMES/ HOSPITALS (In all zones where it is permitted/ permissible on appeal) Minimum plot size - 1338 sq. mtr i.e. 1 Bigha Minimum setback Front setback - 9 metres
(a) Rear & side - 4.5 metres (B) PLACE OF WORSHIP (Applicable for new proposals) Minimum plot size- 804 sq. mtr i.e. 3 K Minimum setback NEW REVISED BUILDING BYELAWS FOR GUWAHATI METROPOLITAN AREA-2006 Guwahati Metropolitan Dev. Authority Page No. [40] Front setback - 7.5 metres
(a) Rear - 5.0 metres
(b) Side - 3.0 metres (C) CINEMA HALL AND AUDITORIUM Minimum plot size - 1860 sq. mtr i.e.1B-3K-9L Minimum setback
(a) Front set back - 9.0 metres
(b) Rear & side - 4.5 metres (D) FILLING STATION
(a) Minimum Plot size- 31 mtr x 17 mtrs
(b) Petrol filling station with servicing bed Minimum Plot size- 37 mtr x 31 mtrs *(E) SCHOOL BUILDING Minim um Plot size Maximu m Coverage Minimu m Front set back Minimu m side setback Minimu m rear setback
(a) Pre nursery/ Nursery 535 sq.
mt 02 katha 50% 6.0 mtr 3.0 mtr 3.0 mtr
(b) Primary 804 sq.
mt 03 katha 50% 7.5 mtr 3.0 mtr 3.0 mtr
(c) High School 2677 sq. mt 02 bigha 30% 10 mtr 3.0 mtr 3.0 mtr
(d) College 4015 sq. mtr 03 bigha 30% 10 mtr 3.0 mtr 3.0 mtr Organised parking- 20% of the total plot area Organised recreational open space- 20% of the total plot area * For Govt. institutions regulations adopted by Education Department will be followed.
“U” type development As an encouragement for developing U type commercial complexes / residential / apartment / group housing the setbacks of sides and rear, excluding the front setback, can be reduced provided.
(a) The area so saved is transferred to the central area / space or court yard.
(b) The minimum open space on sides and rear except front shall be
1.5mtrs for building of 12 m height & 2.4m for building above 12 m
(c) Minimum plot size for performing such development shall be 500 Sq.
mtrs.
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58.9. (i) The area of the plot for a multistoreyed building other than apartment of 15 metre height and above shall be - 04 K.
58.9. (ii) The floor area ratio (FAR), the coverage and the width of the access road for the various type of building is as given below Residential
(a) The FAR for different widths of access road shall be :- Road Width (Metre) Maximum FAR Upto 4.4 100
4.5 to 7.9 175
8.0 or more 200
(b) The coverage for different plot sizes should be: - Plot size (M2) Maximum coverage (%) Upto 500 55 Above 500 50
(c) Commercial and Resi-Commercial (Mixed Use) Minimum road width 3.6 m. to 9 m Plot size (M2) Maximum FAR Maximum coverage (%) Upto 300 200 55 301 to 500 200 50 Above 500 225 45
(d) Others Type of building Maximum FAR Maximum coverage (%) Minimum width-of access-road in M a)Apartment
(i) upto 12 m height
(ii) above 12 m height 175 200 40 40
6.6M 8 M b) Institutional 175 40 9M c)-Wholesale commercial 150 45 9M d) Other public & semi public area 175 40 9M e)-Nursing home 150 40 9M f) Industrial 150 40 9M g) place of worship (applicable for new proposals) 125 40 9M h) Cinema hall / multiplex & 125 40 9M NEW REVISED BUILDING BYELAWS FOR GUWAHATI METROPOLITAN AREA-2006 Guwahati Metropolitan Dev. Authority Page No. [42] auditorium and indoor stadium i) Multiplex The FAR and Coverage stipulations shall be similar to Commercial and Residential-Commercial (Mix use) of plot size above 500 metres square, with additional requirement of parking, over and above parking norms for that building, similar to the requirement of parking space required for Cinema Halls based on the number of seats.
j) Multilevel Car Parking i) Minimum plot size -1000 sq. m.
ii) Maximum Coverage -66% iii) FAR Plot Size 1000 sq. m –2000 sq. m -175 Above 2000 sq. m -200 iv) No restriction on no. of basement with 100% basement subject to structural safety with basement to be flushed with ground level.
v) Maximum height be restricted to permissible height and minimum setbacks be as per commercial building.
For other type of buildings not specifically mentioned above, the Authority will decide considering the similarity of the building with the above use.
58.10.1 Maximum mezzanine area allowed is 33% of plinth area which will not be counted in FAR if it has access from only lower floor. Height of the mezzanine - 2.2m minimum to 2.7m maximum however, no additional area above 33% shall be allowed in mezzanine floor even if FAR is available.
58.10.2 Basement shall not be counted for F.A.R. calculations for following uses-
(i) Air conditioning and other machines used for services and utilities of the building.
(ii) Parking places and garages.
(iii) If the basement is used for office or commercial purpose it shall be counted in F.A.R.
(iv) While calculating the FAR following areas are exempted from FAR calculation- Lift, Staircases and Entrance Lobby area of the Cantilever Cupboard Self subject to a maximum of 2% of the area from which these are projected, Sentry Box and Guard Room (Maximum of 3.5 sq. metre each), Care Taker Room (Maximum 8 sq. metre), Rain Harvesting Structures and Un-Enclosed Covered Parking Places.
(v) For calculation of exemption area from FAR under clause
58.10.2 the entrance lobby will mean the lobby immediately in front of staircase and lift subject to a maximum exempted area of 12 sq. m. per staircase/lift for each floor.
58.10.3 NEW REVISED BUILDING BYELAWS FOR GUWAHATI METROPOLITAN AREA-2006 Guwahati Metropolitan Dev. Authority Page No. [43]
(a) Partial unenclosed balcony projections for a length ¼ of the building length/breadth in upper floors upto a minimum setback line of 1.5 mtr from plot boundary will be allowed subject to a maximum width of 1.5 mtr.
(b) The projection of cantilever or cupboard or shelve upto
0.75 mtr in depth shall be permitted and exempted from covered area calculation. This will be allowed only from the first floor and shall not exceed 2.0 mtr per habitable room and cupboard under windows.
(c) A canopy not exceeding 4.5 mtr in length and 2.5 mtr in width in the form of unenclosed cantilever over the main entrance with a clear height of 2.2 mtr below the canopy shall be allowed.
(d) Light and ventilation:- When any habitable room excepting bath, W.C, store room, kitchen and dining are not abutting on either the front side or rear open space it shall abut in an interior open space where minimum width will be 3 mtr.
For ventilating the spaces for W.C, bath, store, kitchen and dining if not opening on any open space, shall open on the ventilation shaft the size of which is given below- Height of building Minimum area of shaft Minimum width of shaft
(1) W.C, bath & store
(a) upto 18 m
(b) above 18 m.
3 sq. m
6.25 sq. m 2 m
2.5 m
(2) Kitchen & dining
(a) upto 18 m
(b) above 18 m
6.25 sq. m 9 sq. m
2.5 m 3 m
58.10.4 The parking space to be provided in the building shall be as per the details given in the Appendix- I. In providing the parking, care has to be taken that 50% of the open space is left for landscaping and not counted for in the parking calculations. At least 25% of the open space reserved as organised open space which should be clearly shown in the service plan.
For calculation of car space the following shall be considered.
Area of each car space-
(i) Basement parking-30 sq. mtr
(ii) Stilt-25 sq. mtr
(iii) Open Parking-20 sq. mtr In addition to parking requirement specified in Appendix – I, for multistoreyed apartments, commercial complex and nursing homes following parking provisions have to be made in these complexes for visitors/shoppers, which should be easily accessible from the approach road.
Multistoreyed apartment -1 car/4 dwelling units.
NEW REVISED BUILDING BYELAWS FOR GUWAHATI METROPOLITAN AREA-2006 Guwahati Metropolitan Dev. Authority Page No. [44] Multistoreyed shopping/ Office complex -1 car/100 sq.mtr. of area -1 scooter/50 sq.mtr. of area Nursing home -1 car/5 cabin of single accommodation.
-1 Scooter/5 bed accommodation This area is inclusive of the circulation and driveway etc. as provided in National Building Code 2005. For actual size of a car space (excluding circulation and driveway area) to be taken as 13.75 sq. metre.
58.10.5 No extension of existing building will be allowed by the Authority if the parking provision required for the whole building as per new Byelaws is not made available in the new proposal.
58.11 ADDITIONAL REQUIREMENTS FOR MULTISTOREYED AND SPECIAL TYPE OF BUILDINGS (A) Service plan showing the following details-private water, sewerage disposal system and detail of building services where required by the Authority shall be made available on scale not less than 1:100 and it should also include the following.
(a) For outlet from the soakpit to municipal drain if provided an intermediate treatment chamber should be installed details of which is to be shown in service plan subject to approval of the Authority and provision made under Sec. 64 wherever required.
(b) Garbage vet.
(c) Organised open space as specified by clause
58.10(4).
Detail of building services include
(i) Air conditioning system, if any.
(ii) Detail of exits including provisions of ramps, etc. for hospital and special risk building
(iii) Location of generator, transformer and switch gear.
(iv) Smoke exhauster system and fire alarm, if any.
(v) Location of centralized control of all fire alarm systems, if any.
(vi) Location and dimension of static water storage and pump house.
(vii) Location of fire protection installation, sprinklers, wetrisers, etc, if any. .
N.B.-These should generally be as per specifications of National Building Code
2005.
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(viii) Size (width) of main and alternate staircase along with balcony approach, corridor and ventilated lobby approach.
(ix) In case of nursing homes and hospitals, detail of incinerator for treatment of hospital waste is to be submitted and clearance from appropriate authority under Assam Health Establishment Act 1993 and 1995 will be required before its clearance by GMDA.
(x) Detail provisions made of conservation and harvesting of rain water to be provided as required under CL. 65 of this Byelaws.
(B) (i) NOC from the State Fire Service shall be required for building above the height of 15.8 m.
(ii) In addition to this NOC mentioned in (i) above it will be mandatory to provide all provision of Part (4) of NBC 2005, for fire and life safety in the building.
(C) Specifications:- General specifications of the proposed construction giving type and grade of material of public use along with soil testing report and structural details as given in Chapter- VI duly signed by architect/ engineer/ supervisor/ group should accompany the application for buildings above three storey.
(D) Supervision: Applications shall be further accompanied by a certificate of supervision in a prescribed form given in Chapter- VI by the licensed architect, engineer, groups as the case may be.
(E) A certificate to the effect that the maximum requirement of power in the building/ project is being intimated to A.S.E.B. in advance.
58.12 For the hazardous and industrial building the Authority will ask for NOC from the State Pollution Control Board.
58.13 All other regulations not specifically mentioned here will be applicable as per the provision of Zoning Regulations.
58.14 The Authority may ask for any other information considering special nature of building and location of the plot.
58.15 Engineers Group, Structural Engineers, Geo-Technical Engineers/ Consultants, Supervisors referred to above shall be licensed/ enrolled by the Authority as competent to do various works as specified in this rules and modifications made from time to time, detail of which is given in annexure – II where as Architects registered as an Architect by the Council of Architects under the Architect Act 1972 are not required to be registered if they provide satisfactory proof of their valid registration under Architect Act, 1972.
58.16 Penal action for violation of Master plan & its Zoning Regulations and-Byelaws.
The Authority under provisions of GMDA Act, 1985 shall take penal action for violation of Master Plan/ Zoning Regulations or Byelaws which may include stoppage of construction activity, demolition/ NEW REVISED BUILDING BYELAWS FOR GUWAHATI METROPOLITAN AREA-2006 Guwahati Metropolitan Dev. Authority Page No. [46] alternation and in paying fine and by imposing penalties as given in Appendix-III.
58.17 The structural design, constructional standard etc. of all multistoreyed buildings are required to be supervised during construction at three stages at (1) foundation (2) plinth/ Gr. Floor, (3) upper floor in the manner described below.
i) The individual /promoter is required to get their construction checked at above mentioned three stages of construction through licensed technical firms of Authority before proceeding with next stage of construction failing which the Authority may revoke the permission.
ii) The supervision under this clause will be done by the concerned firm. Necessary certificate is to be submitted duly signed by firm and applicant in the manner given in Form 1 to 4.
iii) The individual promoter/developer is required to employ technical personnel of suitable competence for daily supervisions of construction work.
58.18 The inconsistent provisions of the present Zoning Regulations will cease to operate within Guwahati Metropolitan Area with effect from the date on which these modifications are first published and the Authority can enforce these provisions with immediate effect from a date to be notified by the Authority.
58.19 Should any dispute arise about the interpretation of any definitions or provisions of these rules, the decision of the Authority shall be final.
However, aggrieved persons may appeal to the appellate authority against such decisions and the decisions of the appellate authority shall be final and binding to all concerned.
58.20 For construction of any public and apartment building of heightabove-12-metre-–
(i) The structural design is required to be done as per IS code of practice by a licensed structural engineering consultant and the structural calculations, designs and drawings and specifications are-certified-bythis-consultant.
(ii) The soil testing report on which the design is based is required to be obtained from a licensed Geo-technical consultant.
(iii) For public buildings and apartments, permission for construction shall not be granted unless :-
(a) The builder submits detailed calculations of structural design along with copies of structural drawings and specifications certified by the structural engineering consultant. (detail in Chapter-VI)
(b) Provision is made for appropriate treatment of septic tank effluent, sullage water, garbage and drainage of waste water.
Note: - (a) The Authority may go for proof checking of structural design through a structural designs review panel to be setup by the Authority. Proof checking will only be done on the basis of recommendations of the Committee approving the proposal based on each case as specified in Chapter-VI.
NEW REVISED BUILDING BYELAWS FOR GUWAHATI METROPOLITAN AREA-2006 Guwahati Metropolitan Dev. Authority Page No. [47]
(b) Record of construction progress be intimated to the Authority and stage for recording progress certificate (format to be given by the Authority) and checking is given below: - (detail given in Chapter-VI)
(i) Plinth in case of basement before casting of basement slab
(ii) First storey
(iii) Middle storey incase of multistoreyed building
(iv) Last storey The progress certificate is to be signed by owner/developer/builder and R.T.P.
Note: Procedure to be followed for ensuring structural safety of the building will be governed by provisions given in detail in Chapter-VI of these rules.
(iv) Availability of source of water supply is to be ensured by the builder before granting permission for construction of a multistoried building. Report of test boring and other study to ascertain the availability of ground water may be called for if the source of water is ground water.
(v) Electrical installation: Proper location and space for electrical facilities as per Indian Electricity Rules is to be provided in all buildings above 15 m height and all works of lift installation must comply with requirement of B.I.S.
codes of practice and relevant provisions of Indian Electricity Rules and should be approved by the Chief Electrical Officer of Govt. of Assam.
(vi) Improvement of drains upto the nearest outlet point is to be made as directed by the Authority. Additional 25% of the cost of improvement at PWD rate be imposed as penalty if such improvement is not done as directed by the Authority.
58.21 Should at any time the Authority decide that certain provision of these rules require change or suspension in certain areas for a comprehensive development of the area, the same can be made by the Authority with prior approval of the Govt.
58.22 Provisions of National Building Code 2005 will apply in case of those provisions which are not specified in this Byelaws.
NEW REVISED BUILDING BYELAWS FOR GUWAHATI METROPOLITAN AREA-2006 Guwahati Metropolitan Dev. Authority Page No. [48] Chapter-V MISCELLANEOUS