The hot tub that feels like a stage

Who can see me, and what would stop them?

Privacy is a geometry problem with a view cost. The useful answer is the smallest thing that interrupts the specific line that bothers you.

The line

Right neighbour's bedroom has a clear line from 38 feet away, 15 degrees above the seat. Halfway along that line a barrier would have to reach about 10.3 feet. A 11.9 ft screen 25 ft out is the smallest thing that closes every line that matters. It leaves the view essentially intact.

Every marked observer and how open their line is.
Who	Line	Distance	Above the seat	Bearing	Barrier halfway	Interrupted by
Right neighbour's bedroom	Wide open	38.3 ft	15°	133°	10.3 ft	nothing
Left neighbour's landing window	Blocked	41.8 ft	13°	225°	10 ft	The spruce

The smallest thing that closes it

A 11.9 ft screen 25 ft out

11.9 feet high and about 4.2 feet wide, standing 25 feet from the seat, across the line from Right neighbour's bedroom. That is roughly 50 sq ft of material.

Privacy 52 → 9View 100 → 100your land

Sized against 1 of 2 marked observers. Nobody of any weight is left with a view in.

You are overlooked from 2 separate directions, so these are 2 problems rather than one. No single screen closes them all without enclosing the space.

Every position tested

Close to the seat means short and wide. Close to them means tall and narrow, and usually not your land.

What	Height	Width	Material	Privacy after	View kept	Still sees in	Whose land
2 screens, one for each direction The smallest screen tested on each side, taken together: 11.9 ft across the line from Right neighbour's bedroom, 11.4 ft across the line from Left neighbour's landing window. Roughly 98 sq ft of material in total. This is 2 separate builds, not one, and together they start to enclose the space.	11.9 ft	8.4 ft	98 sq ft	4	100	nobody	your land
A 7.1 ft screen 6.9 ft out 7.1 feet high and about 9.9 feet wide, standing 6.9 feet from the seat, across the line from Right neighbour's bedroom. That is roughly 70 sq ft of material. Being close to the seat means it has to be wide to cover the angle, and it sits right where you are.	7.1 ft	9.9 ft	70 sq ft	9	100	nobody	your land
A 8.3 ft screen 11.5 ft out 8.3 feet high and about 8.4 feet wide, standing 11.5 feet from the seat, across the line from Right neighbour's bedroom. That is roughly 70 sq ft of material. Neither short nor narrow.	8.3 ft	8.4 ft	70 sq ft	9	100	nobody	your land
A 9.8 ft screen 17.2 ft out 9.8 feet high and about 6.6 feet wide, standing 17.2 feet from the seat, across the line from Right neighbour's bedroom. That is roughly 65 sq ft of material. Neither short nor narrow.	9.8 ft	6.6 ft	65 sq ft	9	100	nobody	your land
A 11.9 ft screen 25 ft out 11.9 feet high and about 4.2 feet wide, standing 25 feet from the seat, across the line from Right neighbour's bedroom. That is roughly 50 sq ft of material. Being near the far end means real height, and it is the position most likely to be on somebody else's land.	11.9 ft	4.2 ft	50 sq ft	9	100	nobody	your land
A 7 ft screen 7.5 ft out 7 feet high and about 9.9 feet wide, standing 7.5 feet from the seat, across the line from Left neighbour's landing window. That is roughly 69 sq ft of material. Being close to the seat means it has to be wide to cover the angle, and it sits right where you are.	7 ft	9.9 ft	69 sq ft	47	100	Right neighbour's bedroom	your land
A 8.1 ft screen 12.5 ft out 8.1 feet high and about 8.4 feet wide, standing 12.5 feet from the seat, across the line from Left neighbour's landing window. That is roughly 68 sq ft of material. Neither short nor narrow.	8.1 ft	8.4 ft	68 sq ft	47	100	Right neighbour's bedroom	your land
A 9.5 ft screen 18.8 ft out 9.5 feet high and about 6.6 feet wide, standing 18.8 feet from the seat, across the line from Left neighbour's landing window. That is roughly 63 sq ft of material. Neither short nor narrow.	9.5 ft	6.6 ft	63 sq ft	47	100	Right neighbour's bedroom	your land
A 11.4 ft screen 27 ft out 11.4 feet high and about 4.2 feet wide, standing 27 feet from the seat, across the line from Left neighbour's landing window. That is roughly 48 sq ft of material. Being near the far end means real height, and it is the position most likely to be on somebody else's land.	11.4 ft	4.2 ft	48 sq ft	47	100	Right neighbour's bedroom	your land

No view worth keeping has been marked, so the cost side of every screening option is missing.

You are overlooked from 2 separate directions. Each option below closes the lines it was sized against and no others; the residual column says who is left. There is no single object that closes all of them without enclosing the space.