The 50 × 100 — fifty by a hundred feet, roughly 15 by 30 metres, an eighth of an acre — is the default Kenyan plot. It is what the sacco subdivided, what the roadside billboard is selling, what most first builds stand on. Owners ask “what can I build on it?” The more useful question is what remains after the non-negotiables have taken their share — because they take it first, whether you planned for them or not.
The plot is smaller than the title deed says
Setbacks are measured inward from your boundaries, and your county’s zoning sets the figures — commonly a few metres at the front and smaller strips at the sides and rear, more where a road reserve or riparian line passes. Coverage rules then cap how much of the ground the house may occupy at all. After typical suburban setbacks, a 15 × 30 plot offers a buildable window closer to 11 or 12 metres wide and around twenty deep. The exact numbers belong in the brief before the first wall is drawn — finding them at submission costs weeks.
Then the services take theirs
- The septic and soak pit. Where there is no sewer, they need clearance from the house, the boundaries and any well — a corner of the plot is claimed before the house is placed.
- Parking and the driveway. Designed backwards from the gate. A standing car wants about 2.5 × 5 metres, and the driveway to it is ground the garden never gets back.
- The tank, the line, the store. Water storage, the laundry line, somewhere for tools and the ladder. Unplanned, these colonise the yard; planned, they disappear into it.
The bungalow on an eighth
A comfortable 3-bedroom bungalow — ours is 145.6 m² — covers roughly a third of the plot. Add the driveway, the septic corner and the setback strips, and what remains is a usable but finite garden. Stretch to a 4-bedroom bungalow and the yard starts disappearing; extend sideways later and it is the garden you spend. On an eighth, a bungalow is a choice to spend the ground on rooms.
The maisonette on an eighth
The same rooms stacked change the arithmetic. A 4-bedroom maisonette of 229.1 m² stands on about 115 m² of ground — a quarter of the plot — and returns the rest as yard, trees, a DSQ, or simply distance from the boundary wall. This is why the denser estates go up. The trade is real: a staircase to climb for decades, and a structure that must carry its upper floor from the first pour. The choice is a lifestyle decision before it is a cost one — but on tight ground, the maisonette is usually what the plot is asking for.
Orientation on a long, narrow plot
A 50 × 100 runs long from the gate. Its long facades face the sides — so which way the plot points decides which rooms can have morning light and which walls take the afternoon heat, before any preference of yours is consulted. A plan drawn for your neighbour’s north-facing plot is the wrong plan for your east-facing one, even at the same dimensions. Orientation is a brief fact, not a taste.
Brief the plot, not the fantasy
This is the conversation Chimbuko starts with: plot dimensions, orientation, gate position, slope, services — then the rooms. The plan is drawn inside your real buildable window with the setbacks as constraints and the coverage arithmetic already done, and you see the dimensioned floor plan, with two revisions free, before you pay anything. An eighth of an acre is enough for a very good house — if the house is designed for the eighth you actually own.