- Punch list
- Punch out
- Putty
- PVC or CPVC
- Quarry tile
- Quarter round
- R factor or value
- R Value
- Rabbet
- Radiant heating
- Radiation
- Radon
- Radon system
- Rafter
- Rafter, hip
- Rafter, valley
- Rail
- Railroad tie
- Rake fascia
- Rake siding
- Rake
- Ranch
- Ready mixed concrete
- Rebar, reinforcing bar
- Receptacle
- Recording fee
- Redline, red lined prints
- Reducer
- Reflective insulation
- Refrigerant
- Register
- Reglaze
- Relief valve
- Remote
- Retaining wall
- Retentions
- Ribbon (girt)
- Ridge board
- Ridge shingles
- Ridge