| Lakeview, Castlebar | — | 10 |
| Lakeview, Mayfield | — | 9 |
| Lakeview, Rathbawn Rd | — | 12 |
| Lanmore, Liscarney | — | 6 |
| Lansyn, Bohernasup | — | 8 |
| Larch Hill, Swinford | — | 13 |
| Larganboy, Ballyhaunis | €140,000 | 6 |
| Lavey, Charlestown | — | 6 |
| Lavey Manor, Charlestown | €233,480 | 28 |
| Lawn Park, Castlebar | — | 8 |
| Lecanvey, Westport | — | 11 |
| Lecarrow, Ballyhaunis | — | 5 |
| Lehinch, Hollymount | — | 6 |
| Leicnin Village, Turlough | €320,000 | 25 |
| Letterass, Leenane | — | 5 |
| Letterbrock, Liscarney | — | 5 |
| Libadore, Ballina | €258,000 | 12 |
| Libadore, Bohernasup | — | 9 |
| Linehall Street, Castlebar | — | 6 |
| Lios Mor, Quay Rd | — | 5 |
| Lios Mor, Rathbawn Road | €409,692 | 13 |
| Lios Mor Apartments, Newport | €36,000 | 11 |
| Lios Na Sioga, Binghamstown | €155,000 | 6 |
| Liosamble, Ballindine | €281,000 | 7 |
| Lisbaun, Claremorris | — | 16 |
| Lisbrogan, Swinford | — | 6 |
| liscromwell, castlebar | — | 10 |
| Liskilleen, Ballinrobe | — | 7 |
| Lisnaboley Lane, Claremorris | — | 7 |
| Lissatava, Hollymount | — | 6 |
| Logalisheen, Ballindine | — | 8 |
| Long Street, Louisburgh | — | 5 |
| Lord Edward Street, Ballina | €82,000 | 40 |
| Lough Conn Drive, Annagh Village | — | 5 |
| Lower Chapel Street, Castlebar | — | 5 |
| Lower Charles Street, Castlebar | €89,250 | 20 |
| Lower James Street, Claremorris | — | 7 |
| Lowpark, Charlestown | — | 14 |
| Lowpark Avenue, Charlestown | — | 10 |
| Lucan Street, Castlebar | — | 6 |
| Lui Na Greine, Claremorris | — | 7 |
| Lurgan, Brickens | — | 5 |
| The Links, Keel | — | 7 |