@moorings, the location is good. a more intricate subdivision , similar to an estate such as Akila or Imara daima, would be more profitable for the area than the usual 50 x 100ft plots since this area has high demand.
You can easily double your profits from the 8 house profitability to 16 house profit.

@africancoloner. the kiambu area that i know of with plot size restrictions is opposite muthithi in the kugeria neighbourhood.
Am working on a similar project in Kambu next to Runda and the planners are ok with it.
@moorings, you might have to 1st check with the kiambu county planners if such can be allowed at the land. If they dont, you might have to ask if a change of user application can be given to change the rules/byelaws .

@moorings, welcome. If neighbourhood has similar projects, this can be used as precedence to convince kiambu county planners to approve yours.