inground

Inground refers to anything located, built, or installed below ground level. In architecture, landscape design, and construction, the term describes features that are placed under the surface or set into the soil rather than above it. The contrasting term is above-ground, used for elements that sit on or above the ground.

Common applications include inground swimming pools, which are excavated and then lined with concrete, plaster, or fiberglass. In residential construction, basements, underground garages, and subterranean tanks are described as inground components. Landscaping uses include planters, drainage systems, and other installations integrated into the soil or below the surface.

Construction and design of inground features require careful planning. Key considerations include soil stability, groundwater and drainage, frost protection, waterproofing, and compliance with local building codes. Excavation often involves utilities, soil compaction, and backfilling, while safety measures such as proper fencing or barriers may be necessary depending on the feature and location. Maintenance considerations include monitoring for leaks, settlement, or water intrusion and ensuring proper drainage over time.

Etymology and usage notes: inground is commonly written as a compound adjective, sometimes hyphenated as in-ground. The term is widely used in North American English and elsewhere to differentiate below-grade installations from those that are above ground. While most often associated with pools, basements, and tanks, inground can describe any feature integrated into the soil or set beneath the surface.