Building a fence or extending a kitchen sounds simple enough until a neighbor claims you crossed onto their property. Old neighborhoods across the Washington DC region feature tight lot lines, shared driveways and century-old row houses. Property lines here often sit inches away from historic brick structures and shared walkways. Getting a boundary survey clears up confusion before construction crews dig the first trench. What a Boundary Survey Performs A boundary survey establishes the exact physical location of your property corners. Field crews combine physical ground measurements with public land records. They locate hidden iron rods, concrete monuments or old brass caps buried under turf or pavement. Surveyors map all permanent structures on the lot. This includes house foundations, detached garages, retaining walls and stone patios. They also check for encroachments. An encroachment happens when a structure or fence sits past the legal property line. Old urban subdivisions built...