- Gate valve
- GF C I, or G F I
- Girder
- Glazing
- Globe valve
- Gloss enamel
- Glued Laminated Beam (Glulam)
- Grade beam
- Grade
- Graduated Payment Mortgage (GPM)
- Grain
- Grid
- Ground fault
- Ground iron
- Ground
- Groundwater
- Grout
- Gusset
- Gutter
- Gyp board
- Gypsum plaster
- H Clip
- H V A C
- Hardware
- Haunch
- Hazard insurance
- Header
- Hearth
- Heat meter
- Heat pump
- Heat Rough
- Heat Trim
- Heating load
- Heel cut
- Highlights
- Hip
- Hip roof
- Home run (electrical)
- Honey combs