What you can fix before the plots are sold

On an estate where the developer sells plots to individuals, the layout is the only thing you get to decide once. Everything above it is decided later, by people you will never meet.

At Bridge City Estate — fifteen houses on 4,645 square metres — two things were settled before any plot changed hands. The setbacks were agreed at sale, so the building line holds the length of the street whoever builds on it. The drainage gutters run both frontages continuously, and every plot takes them.

What was left open was wall heights and gates.

That is the interesting part, because a wall and a gate are most of what anybody sees of a house from the road. The geometry of the street is contracted and its face is not. You can look at a render of a street where every frontage agrees with the next one and know that only two layers of that agreement are enforceable.

Whether that is the right split is a fair question. A code covering boundary treatment would have held the picture together, and it would also have been one more thing a buyer had to accept on a plot being sold to them as their own. Somebody made that trade deliberately, and it is worth making deliberately rather than by omission.

The drainage is the part that was never really a choice. On ground that flat the gutter only works if it is continuous, so an owner who bridges it badly or fills a stretch of it is not affecting their own plot alone. A setback is a preference enforced by contract. A gutter is enforced by water.