Component

A component is a distinct element of a building with its own material, typical lifespan, failure modes, maintenance schedule, and replacement cost: roof, boiler, window unit. Each one ages independently and produces its own decisions.

The mechanism: thinking in components turns “the house” from an unanswerable question into a list of answerable ones. “What does my house need” generates no action because it has no answer. “When was the roof installed, how long do these tiles last, what is the replacement cost” is a series of facts that add up to a picture of the roof as a distinct thing with its own timeline. Apply the same to the boiler, the windows, the drainage, and the building stops being a blur.

The distinction matters at three moments. Buying a property: the component list is what an inspector or surveyor produces. Planning maintenance: the schedule is per component, not per building. Comparing repair vs replace: the calculation runs against the component’s lifespan, not the building’s age.

Sibling frame: the building (the aggregate, which is the wrong unit for decisions). A property management firm tracks ~20 component categories per building. A homeowner who starts thinking in components has crossed the same threshold a managing agent crossed long ago.