The man was hacked to death on Friday at dawn after refusing demands by raiders.
The houses are selling off-plan for between Sh9.25m and Sh10.5m.
Churches are aggressively pouring billions of shillings into Kenya's property sector.
The houses in the first phase will be sold to civil servants.
The ambitious project is expected to greatly raise the profile of Machakos County.
Most Kenyans acquiring houses are not doing so for speculative intentions.
The 0.5% levy is payable to the authority by owners of projects above Sh5 million.
The property is expected to appeal to high net worth international buyers.
Phase one and two of the project, comprising 850 housing units are completed and fully sold.
Nairobi building permit fees are said to be the highest across the continent.