- Bachelor Apartment
- Back End Ratio
- Back Title Letter
- Back Title Letter (or Certificate)
- Back-End Ratio
- Back-to-Back Escrow
- Backerboard
- Backfill
- Backsplash
- Backup Contract
- Backup Offer
- Backwater Valve
- Baffle
- Balance
- Balance Sheet
- Ball Cock
- Ballcock Assembly
- Balloon (Loan) Mortgage
- Balloon Loan
- Balloon Payment