Measuring elevations is an element of a measured building survey that can be undertaken as a stand-alone item, or in conjunction with a land survey, or in combination with floor plans and sections. We have also undertaken measured elevation surveys for rights of light studies.
We survey elevations using reflectorless total survey stations (which we also use to produce our land surveys) and photogrammetry type software.
Measured elevation drawings are increasingly a standard requirement for all listed buildings when any exterior work is proposed to a property. The biggest difficulty when trying to measure an elevation is being able to have good lines of sight. The main problems are trees and vegetation, which obscure the view to the building that you are measuring and also not being able to get far enough away from the building.
Measuring building elevations like this though does mean that it is possible to draw elevations without requiring access to the property, which is a major advantage when you need to gain information on neighbouring properties, or you need a street scene elevation.
We use the same technology to remotely gather information on building heights. If we undertake a land survey that has a building on site, then we include principal ridge and eave height information as standard on the land survey drawing. We can also remotely position neighbouring properties and their key heights if requested.