The plan required the clearing away of most of the original village, the diversion of the stream and land reclamation in an area bounded by Parumoana Street, Norrie Street, and Titahi Bay Road.
Sites for about 100 shops were developed. The first shop, Fashion Court on Lyttelton Avenue, was opened by the Minister for Lands on 17th October 1963. Several major national and international companies were attracted to the city. It had available land, a local work force and was accessible to transport routes.
The General Electric Company was one of the first industries to establish its factory, in 1965. Other industries to set up included Kodak, Chubb, Ashley Wallpaper, and W.R. Grace.
But the major influence on the Porirua landscape during this period of industrial development was the Todd Motors (later Mitsubishi Motors) assembly plant located on the road to Titahi Bay.
The central city area remained relatively untouched until the early 1990s when a large mall at the cost of $50 million was proposed. The site chosen contained the last area of inner city housing, Eastwood Avenue.
These houses were either removed or demolished to clear the site. Development of the mall was beset by problems with the contractors. The proposed opening was delayed until November 1991, as the K-Mart Plaza.
The development provided an exciting new centre for retail in Porirua. This was complemented in 1995 by the covered walkways over the 1960s shopping area. As the turn of the century new commercial developments were pressed forward, most notably the Mega-Centre stores which began opening in November 1999.