In article .com
nazn wrote:
Hi there,

I would like to build a garden wall that will be adjoining my
neighbours front garden. As there has never been a wall here, how would
I go about measuring/drawing a line that accurately (and fairly) is
straight down the middle between our 2 properties. The wall will be
roughly 16 feet by around 4-5 foot high.

I have considered about using a laser pointing device, but am not too
sure how I would calibrate/level this to get a accurate reading. My
other plan would be to a make a square frame and align this outwards
from my rectangular bay window and then taking measurements between the
bay and the centre point between the two properties and then projecting
this measurement at the other end of the frame.

At the pavement end there is no post or markings where the centre line
is.
I would really appreaciate any advice if there was any other method
employed used to work this out, that was foolproof and could be
demonstrated to produce the same result every time in case of any
future issues.

On the plan attached to the deeds, does the dividing line look straight
from the back of the house to the front of the front garden? Are the
two houses level at the front (in plan view)? If so you should be able
to measure (for example) 10 feet along each house front, then 20 feet to
where you think the boundary is - the point that is 20 feet from the two
positions on the front of the houses will be square with the front.

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Stick a nail in the wall where the houses meet, stick a post in the
ground where the measurements meet, and run a bit of string between them
:-)