- Lattice
- Ledger (for a Structural Floor)
- Ledger strip
- Leech field
- Let in brace
- Level Payment Mortgage
- Level
- Lien
- Light
- Limit switch
- Lineal foot
- Lintel
- Load bearing wall
- Loan
- Loan to value ratio
- Lookout
- Louver
- Lumens
- Male
- Mantel
- Manufactured wood
- Manufacturer's specifications
- Masonry
- Mastic
- Mechanics lien
- Metal lath
- Microlam
- Milar (mylar)
- Millwork
- Miter joint
- Molding
- Monopost
- Mortar
- Mortgage broker
- Mortgage company
- Mortgage deed
- Mortgage loan
- Mortgage
- Mortgage Origination Fee
- Mortgagee