- quadrangle A grassy plaza or urban square, usually at a focal point of a campus.
- quaker meeting house A place designated for frequent religious meetings by members of the Religious Society of Friends.
- qualitative indicators Predefined or subjective measurements of various qualitative aspects of properties.
- qualities Fields which describe an object by assigning labels to it.
- quality certificate Certification for overall quality or for meeting or exceeding prescribed standards.
- quantities Numerical expressions of discrete objects or components expressed as a simple count or tally.
- quantity surveyor A company which calculates or forecasts the cost per element of a construction project.
- quarry An open mine used for the extraction of construction materials from the earth.
- quartz A hard crystallized rock available in a wide variety of colors.
- quartzite A hard metamorphic rock formed from compressed and recrystallized sandstone.
- queen anne A mainly residential style featuring complex shapes with turrets, strong ornamentation, and varied coloring.