undivided share of land in apartment- not properly apportioned in Tamilnadu?

The builder of the apartment planned for 8000 sq ft ,but built only 6000 sq ft plinth and apportioned the undivided share of land to the existing 6000 sqft and retained the uds relating to the unbuilt portion. namely 2000 sq ft ,now after 15yrs, the owners of the apartment needs to rebuild due to structural defects etc .do we need to take the permission of the promoter builder ,What are the legal provision applicable,to the builder and the apartment owners namely . Transfer of property act,wealth tax , income tax, gift tax , stamp duty , etc in case the apartment is rebuilt by the original promoter, or a new promoter.Can the apartment owners sue the builder under specific relief act for transferring the retained portion, for rectification of original sale deed which stands as the hurdle to independent redevelopment of the apartment by the apartment owners, what is the stamp duty applicable in this case of rectification of title deed

How much service tax on apartment unit construction?

Hi , Would anyone know if the tax on an apartment unit (flat) construction is only on the labour part of the cost of construction and not the material. I see articles on the internet stating that only 1/3 of the construction cost should be subject to service tax but I am not entirely sure of this. So at the rate of 10.3% on a property of 20 lakh rupees, it should be 2000000 x (10.3 / 100) x 1/3 = 69000 rupees approximately.
Is this correct?

How much tax to be paid on the sale amount of my apartment in Bangalore?

I am planning to sell my apartment(in Bangalore) which I occupied in 2007 march.The construction started in dec2005 whereas we occupied in march 2007.We bought it for 33L all inclusive.Planning to sell for 37L.Prospective buyers r planning for 85% loan.
Question is:
How much tax do we have to pay?
What is the procedure for paying the tax and is there any time period for paying the tax?