During the Golden Jubilee Celebration of Kalaignar in Legislative Assembly held on 12-5-2007, the Hon'ble Chief Minister, in the presence of Hon'ble Speaker of Lok Sabha, announced that a new Complex for Legislative Assembly will be constructed at a suitable site.

In the high level meeting convened on 26-3-2008, under the Chairmanship of Hon'ble Chief Minister it was decided that the New Complex will consist of 2 blocks of which the first block viz. Block-A will house the Legislative Assembly with certain key common Departments (Home, Finance, Public, Law, Legislative Assembly, Planning & Development and related service facilities) and Block-B will accommodate all other Departments of Secretariat with required facilities.

In the high level meeting convened by the Hon'ble Chief Minister on 17-4-2008 and 11-6-2008, the scheme and design concept for Block-A and Block-B present by M/s.GMP International Architect, Germany was accepted. Accordingly, the programme charts have been prepared and planned to complete the project before March 2010.

The Tender Award Committee, in its meeting held on 17-10-2008 decided to accept the lowest negotiated tender of M/s.East Coast Constructions after four negotiations and work order was issued to lowest negotiated tender and preliminary works commenced on 12-11-2008.

• Global level competition for Architectural consultant.
• Applied for Green Building certification for a GOLD rating.
• Traffic impact study was conducted by Anna University. Based on this report, necessary widening of roads outside the complex was done.
• Environmental clearance from the Government of India was obtained.
• About 95 meetings were convened at all levels of Government to arrive at decisions and sort out the bottlenecks.
• Total built up area: 87058 Sq.m (9,30,297 Sq.ft.)
• Storeys: Ground + 6 Floors
• Height: 100 feet above the average road level of Anna Salai
• Dome: Steel dome of 45m dia (147.26 feet) and 29m (95.12 feet) height over the Assembly Hall roof.
• Required space for respective administrative departments were provided as per the decision of the Committee constituted by the Government.
• Structural Glazing and metal screen, fulfilling Green Building criteria.
• Natural stone cladding with sapphire Blue Granite for facade.
• To reflect Tamil culture "Kolam" pattern extensively used.
• Enclosed driveway with Landscaping.
• Having four pylon structures with connecting corridor.
• Dholpur sand stone dry cladding.
• Two roof gardens one above Chief Minister Circle and Library Circle.
• Rainwater harvesting and treated water reuse being done.
• Roads and driveways - 1000 M
• 1.7 km long compound wall with Reception centre.
• Air-conditioning and ventilation - 4100 TR installed capacity.
• Generators 2 Nos - 2000 KVA.
• High Speed Lifts - 17 Nos.
• Transformers - 7 Nos of 1600 KVA.
• Total number of Labourers engaged Minimum 2000 Nos. Maximum 4300 Nos. excluding sub vendors.
• Total quantity of Steel used about 1,12,60,400 Kgs.
• Total quantity of Cement used about 2,37,60,000 Kgs.
• Even though, the soil tests were conducted properly as per the I.S.Codes, initially, driving the driven pile foundation was found difficult, since unexpected hard strata at a shallow depth was found in a particular contour of the site, which was not permitted. Alternatively bored pile was adopted which in turn delayed the programme chart for 1 month. This delay was adjusted in rest of the works with good quality.
• The plaza first floor is approached by climbing 48 steps provided around the circle for 1760 ft. length. This along with hefty pylon columns, give a gigantic aesthetic look for the building.
• The Assembly Hall is located in the ground floor of the Assembly circle, circular in shape with a diameter of 120 ft., head room of 100 ft. and 11500 sq. ft. plinth area.
• The structural designs for huge span of Assembly circle roof top beam, slabs and the beam between 2 pylon columns in plaza circle was verified by PWD and 3rd party verification (Anna University) was obtained and suggested modification in structural designs were incorporated for safety of the structure. The time loss due to this was adjusted by expediting the finishing works with good quality.
• All codal provisions, circulars and other relevant instructions were adhered to during construction for safety and stability of the structure.
• This prestigious project with specialized structural members with gigantic aesthetic architectural look was completed in stipulated time with a lot of appreciation from the public.