Construction FAQ's

Most frequent questions and answers

FSI – means Floor Space Index – this is the ratio between the total plot area to the total built- up area of the building. This number represents maximum floor area you can build on your land. For example: Let’s assume you have a land area of about 2500 sq.ft and FSI in your location is 1.5, you can have buildup area of 3750 sq.ft (2500X1.5).

The proposed building set in the form of a drawing (autocad drawings) has to be submitted to the appropriate authorities for sanction. The approved drawings from the authorities are called as approved plan. This has to be done before the construction process starts.

Constructing a house, yourself is better than buying a house already built, because we can build our home to suit our own taste, budget and of course in good quality, which cannot be expected from a readymade one.

If you go for a ready-made one, it would have been constructed according to the owner’s taste, budget, and their own location preference. Normally people prefer ready-made homes only for the difficulties they may face during construction, but if you have a good contractor service, it is always better to build your dream home yourself.

Yes, despite of the technology used you will get a home loan for constructing a house, just as you would for buying an apartment or a villa.

You can get home loan from any preferred bank of your choice either before purchasing the land or after you purchase a plot in your name. You can also get a complete home loan, which includes a plot purchase loan and a construction loan or an independent construction loan. All these are eligible for tax benefits.

Legal approval is required from the local self-government body, which is a Panchayat or Municipality or a Corporation depending on the local body under which the property falls.

First step is to get a floor plan designed using the services of an Architect or a builder. After the floor plan is finalized, you have to create a floor plan with the standards given by the local authorities. Next step is to get the plan approval. Then the construction of the building can be done.

Construction involves many service elements. Quality of construction depends on many major and minor factors like careful planning, choosing quality building materials etc.

A good contractor takes utmost care in planning and purchasing good quality construction materials to give you the best possible house that suits your dream and budget.

Yes, Cityrene Builders have a well experienced in-house Architect team.

Cityrene Builders being a turnkey contractor, there are no hidden charges or service charges associated with our services.

On the basis of customer request, if there are any additional items will be charged extra but all the additional items will be mentioned in the agreement. We charge approximately Rs.1700/- per sq.ft for AAC Block construction and Rs.1800/- per sq.ft for GFRG construction.

The normal construction duration of a house in Chennai is approximately 3-4 months. This is subjected to change depending on practical issues like labour problems, material non-availability, rains and strikes which actually effect construction in a site.

  • Title deed of the land should be clear, if possible consult a lawyer over the title deed.
  • House plot should not be under any acquisition proceedings of any government bodies
  • Required size of plot and construction area
  • Existing rates area wise
  • Available infrastructure like water supply, drainage, road etc
  • Verify from the planning authorities whether the land was designated for residential use.
  • Distances from Railway Station, Bus Stand and Air Port.
  • Distance from your work place.
  • Distances from hospital and medical clinics.
  • Certificate obtained from registrar’s office should confirm that there is no encumbrance on the property.
  • Verify the rates after contacting some property consultants and some people who have purchased their plots recently.
  • Stamp duty at the time of registration is mandatory.


Most frequent questions and answers

GFRG construction is an innovative green construction technology used in Australia since 1990’s. IIT professors have done research on GFRG technology and built a model house in IIT campus in 2012. GFRG is the short form for glass fiber reinforced gypsum. GFRG system is a load bearing system (there is no need of beams and columns). GFRG panels are erected at site using cranes. Check out this video to see how GFRG panels are erected

GFRG panel is made of gypsum and glass fiber(reinforcement). Check out this link for GFRG panel manufacturing. 

It comes only in 1 size 5 inches or 124 mm

GFRG panel is world’s largest load bearing lightweight panels. The panels are manufactured with size 12 m length, 3m height and 124 mm thickness.   Each panel has 48 modular cavities of 230 mm x 94 mm x 3m dimension. The weight of one panel is 1440 kg or 40 kg/sqm. The density is 1.14g/cm3, being only 10-12% of the weight of comparable concrete /brick masonry.Light weighted Rapid wall has high compressive strength, shearing strength, flexural strength and ductility. It has very high level of resistance to fire, heat, water, termites, rot and corrosion. Concrete infill with vertical reinforcement rods enhances its vertical and lateral load capabilities. 

  • Eco-Friendly & Safe
  •  All Climate & Weather proof
  •  20% + Overall cost saving
  •  Fire,Sound,Flood proof
  •  Earthquake Resistance
  •  No Air Cracks & Water Patches
  •  Rapid Construction
  •  8% More Carpet Area
  •  Keeps The Building 4 Degrees Cooler
  •  2/3 Labor & Water Saving
  •  Less Usage Of Sand
  •  Build upto 10 Floors +
  •  Very Neat & Modular Finishing
  •  Structural life over 75 years

No, GFRG houses are completely safe. They do not aggrevate or create any health hazards when exposed to it. GFRG is a GEP (Green Environmental Protection) material has no odor, and its Radioactive Nuclide Limit is accord with A-style decoration material standard of GB6566-2001, which can be used for recycling. GFRG material is also approved as green building material by US Green Building Council(USGBC)

  • Need space for crane to operate & can not make curvy walls,however curvy walls can be made by concrete. 
  •  Need trained labours and storage space to store the panels

Yes it is recognized and approved by BMTPC – Building Material & Technology Promotion Council, India (Approved)

IITM has dedicated over a decade in R&D and now it has come to the stage of technology transfer.

Please send us the floor plan and we will provide you with estimated Quote

No, it’s not recommended to build over an existing building

Smart & Sustainable home related FAQ's

Most frequent questions and answers

A smart home is one which can monitor your live usage of power, water and internet data, thus helping the user to reduce the additional usage.

It works with IOT (internet on things). Special relays will be fit into the switchboxes and connected with the electrical lines. It will help in controlling the electrical appliances through your mobile or voice.

Homes which recycles its own waste and generating its own energy contributing towards the reduction of pollution and making the world green. 

  • Generating its own energy by solar
  • Generating its own drinking water out of air
  • Using energy efficient appliances to reduce the power consumption
  • Recycling the grey-water and bio-degradable waste from kitchen

An average 2BHK home user spends around 15K for power, water and internet data. Wouldn’t it be nice if there was a way to reduce these costs?

AAC related FAQ's

Most frequent questions and answers

Autoclaved Aerated Concrete is a Lightweight and load-bearing material. It is also highly durable and has high insulating properties. AAC blocks are three times lighter compared to the red bricks.

compared to the red bricks

AAC blocks are a very strong building material. AAC blocks have the strength of about 4N/mm2(MPa). They are stronger and safer than both bricks and concrete blocks. Due to this property, they are used in multi storied apartments. It is 25% stronger than other products of the same density.

Autoclaved Aerated Concrete (AAC) Blocks is a certified green building material, that comes from industrial waste and is made from non-toxic ingredients. It is reusable, renewable and recyclable.

  • No, they are not the same. Solid concrete blocks are made of a mixture of Portland cement, water, sand and gravel. Whereas AAC Blocks are made by the mixture of fly ash, cement, lime, gypsum and an aeration agent. The Problem of fly ash disposal is solved by the use of fly-ash in AAC Block. Cement is used in very little Quantity.

With AAC, your construction process can be about 20 per cent faster.

The average cost of construction per sq.ft with AAC block construction is Rs.1700/-. Check out our online cost estimator here (cost estimator link) to know more.

AAC block has excellent thermal insulating qualities. This property helps in keeping the house warm during the winters and cool during the summers which ultimately leads to savings in air conditioning load and consequently enhanced energy efficiency.

Eco-friendly & Sustainable


Thermally Insulated & Energy Efficient

Sound insulation

Fire Resistant

Easy Workability and Design Flexibility.

Seismic Resistant

Termite/Pest Resistant

Very low Maintenance

Faster Construction

For outer wall the AAC blocks thickness would be 6” and inner wall 4”. In conventional brick construction the outer and inner wall thickness would be 9” and 4.5” so you get more carpet area with AAC block construction.