| Sash | - | Framework for glass - in particular double-hung sliding sash window |
| Screed | - | Layer of fine concrete used to provide smooth surface prior to floor finish |
| Sarking Felt | - | Waterproof felt under roof tile battens |
| Second Fix | - | Items fitted following plastering - including joiner, cupboards and plumbing/electrical fittings |
| Sill | - | Bottom horizontal member of a door or window frame |
| Sleeper Wall | - | A wall under the wooden ground floor of a house with no basement supporting the floor joists usually with a few bricks omitted for ventilation |
| Solid Wall | - | A wall of any masonry material (but usually brick or concrete block) which consists of a single layer of brickwork (of any thickness) and which does not have a cavity |
| Skim | - | Finishing coat of plaster |
| Skirting | - | Horizontal board at junction between floor and wall |
| Soffit | - | Visible underside of a projecting surface |
| Span | - | Horizontal distance covered by a beam or lintel etc. |
| Spoil | - | Material dug out during excavation |
| Stack | - | Vertical pipe carrying waste from sinks and toilets |
| Stocks | - | Hand or machine-made bricks made in a mould |
| Stretcher | - | The side face of a brick |
| String | - | Sloping board carrying the treads and risers of a staircase |