Around the dockyard and older town, terraces and compact streets leave little unused elevation, and some buildings carry historic sensitivity. St Mary’s Island is largely later apartments and townhouses, where leasehold rules, shared plant space and river-facing glass often matter more than wall thickness. Walderslade, Luton, Capstone and Lordswood are extensive family estates: more driveway space, more boxy rooms, and occasional open-plan rear additions that overheat while the front reception stays comfortable.
A Chatham survey should identify which of those contexts the property actually is, then size rooms, glazing and occupancy from there. Condensate on a waterfront apartment, pipe routes through a terrace, and a condenser pad beside a Walderslade garage are three different mechanical problems. Quiet running toward close neighbours is a common requirement on both the historic streets and the denser parts of the estates.