| Secondary dwellings in buildings destined mainly for dwellings according to year of construction of the building (grouped). 48-Vizcaya |
| TOTAL | Before 1900 | 1900-1920 | 1921-1940 | 1941-1950 | 1951-1960 | 1961-1970 | 1971-1980 | 1981-1990 | 1991-2001 | |
| TOTAL | 21014 | 2960 | 742 | 868 | 835 | 1877 | 5244 | 4530 | 1810 | 2148 |
| 48001-Abadiño | 26 | 7 | 3 | 0 | 0 | 1 | 2 | 3 | 2 | 8 |
| 48002-Abanto y Ciérvana-Abanto Zierbena | 102 | 22 | 19 | 3 | 4 | 21 | 11 | 2 | 7 | 13 |
| 48911-Ajangiz | 12 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 1 |
| 48912-Alonsotegi | 114 | 12 | 10 | 15 | 6 | 16 | 5 | 2 | 3 | 45 |
| 48003-Amorebieta-Etxano | 76 | 11 | 0 | 2 | 4 | 3 | 6 | 25 | 10 | 15 |
| 48004-Amoroto | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
| 48005-Arakaldo | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 48006-Arantzazu | 13 | 6 | 0 | 0 | 2 | 1 | 2 | 1 | 1 | 0 |
| 48093-Areatza | 46 | 11 | 0 | 0 | 4 | 5 | 5 | 9 | 6 | 6 |
| 48009-Arrankudiaga | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 48914-Arratzu | 28 | 21 | 4 | 0 | 0 | 0 | 1 | 0 | 2 | 0 |
| 48010-Arrieta | 50 | 32 | 0 | 0 | 1 | 2 | 2 | 2 | 1 | 10 |
| 48011-Arrigorriaga | 113 | 3 | 4 | 4 | 4 | 7 | 19 | 13 | 7 | 52 |
| 48023-Artea | 32 | 7 | 5 | 1 | 1 | 2 | 0 | 2 | 3 | 11 |
| 48008-Artzentales | 64 | 1 | 9 | 9 | 11 | 13 | 3 | 4 | 1 | 13 |
| 48091-Atxondo | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 48070-Aulesti | 36 | 21 | 1 | 0 | 3 | 2 | 1 | 0 | 3 | 5 |
| 48012-Bakio | 1766 | 12 | 20 | 34 | 37 | 61 | 694 | 568 | 214 | 126 |
| 48090-Balmaseda | 65 | 21 | 0 | 2 | 7 | 4 | 12 | 11 | 5 | 3 |
| 48013-Barakaldo | 704 | 33 | 51 | 67 | 37 | 173 | 195 | 117 | 5 | 26 |
| 48014-Barrika | 169 | 19 | 1 | 6 | 8 | 5 | 50 | 30 | 24 | 26 |
| 48015-Basauri | 160 | 3 | 3 | 16 | 6 | 22 | 69 | 30 | 6 | 5 |
| 48092-Bedia | 22 | 3 | 1 | 1 | 3 | 3 | 5 | 1 | 1 | 4 |
| 48016-Berango | 28 | 0 | 3 | 1 | 3 | 3 | 3 | 4 | 1 | 10 |
| 48017-Bermeo | 477 | 43 | 40 | 27 | 19 | 63 | 135 | 69 | 22 | 59 |
| 48018-Berriatua | 2 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| 48019-Berriz | 11 | 1 | 0 | 0 | 0 | 0 | 2 | 5 | 2 | 1 |
| 48020-Bilbao | 3484 | 259 | 150 | 289 | 217 | 618 | 939 | 540 | 268 | 204 |
| 48021-Busturia | 466 | 77 | 4 | 19 | 23 | 10 | 89 | 208 | 13 | 23 |
| 48901-Derio | 10 | 1 | 0 | 0 | 0 | 2 | 6 | 0 | 1 | 0 |
| 48026-Dima | 129 | 81 | 8 | 1 | 3 | 10 | 0 | 11 | 1 | 14 |
| 48027-Durango | 238 | 22 | 1 | 0 | 6 | 29 | 24 | 48 | 19 | 89 |
| 48028-Ea | 380 | 127 | 3 | 2 | 4 | 6 | 48 | 152 | 21 | 17 |
| 48031-Elantxobe | 210 | 78 | 15 | 24 | 12 | 9 | 14 | 18 | 25 | 15 |
| 48032-Elorrio | 63 | 17 | 3 | 3 | 1 | 3 | 18 | 6 | 3 | 9 |
| 48902-Erandio | 119 | 11 | 9 | 6 | 11 | 6 | 45 | 23 | 6 | 2 |
| 48033-Ereño | 31 | 24 | 2 | 0 | 0 | 0 | 1 | 1 | 0 | 3 |
| 48034-Ermua | 22 | 0 | 0 | 0 | 0 | 4 | 12 | 3 | 2 | 1 |
| 48079-Errigoiti | 42 | 32 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 8 |
| 48029-Etxebarri Anteiglesia de San Esteban-Etxebarri Doneztebeko El | 35 | 1 | 7 | 0 | 2 | 1 | 4 | 15 | 0 | 5 |
| 48030-Etxebarria | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 48906-Forua | 29 | 5 | 2 | 1 | 0 | 1 | 7 | 9 | 1 | 3 |
| 48035-Fruiz | 51 | 14 | 2 | 2 | 4 | 4 | 4 | 2 | 7 | 12 |
| 48036-Galdakao | 32 | 0 | 0 | 1 | 2 | 0 | 7 | 8 | 8 | 6 |
| 48037-Galdames | 83 | 48 | 15 | 5 | 1 | 2 | 3 | 2 | 6 | 1 |
| 48038-Gamiz-Fika | 47 | 27 | 2 | 1 | 0 | 0 | 3 | 3 | 5 | 6 |
| 48039-Garay | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 48040-Gatika | 67 | 15 | 0 | 0 | 3 | 1 | 3 | 5 | 8 | 32 |
| 48041-Gautegiz Arteaga | 197 | 76 | 6 | 8 | 2 | 5 | 9 | 12 | 38 | 41 |
| 48046-Gernika-Lumo | 362 | 20 | 0 | 16 | 27 | 28 | 80 | 108 | 41 | 42 |
| 48044-Getxo | 856 | 28 | 7 | 30 | 27 | 101 | 198 | 263 | 105 | 97 |
| 48047-Gizaburuaga | 9 | 4 | 3 | 1 | 0 | 0 | 1 | 0 | 0 | 0 |
| 48042-Gordexola | 39 | 16 | 6 | 0 | 0 | 2 | 11 | 2 | 1 | 1 |
| 48043-Gorliz | 1421 | 19 | 5 | 5 | 26 | 28 | 723 | 346 | 135 | 134 |
| 48045-Güeñes | 38 | 2 | 4 | 1 | 2 | 6 | 6 | 7 | 2 | 8 |
| 48048-Ibarrangelu | 241 | 67 | 9 | 15 | 11 | 14 | 28 | 45 | 39 | 13 |
| 48094-Igorre | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 3 |
| 48049-Ispaster | 19 | 11 | 0 | 0 | 0 | 0 | 0 | 3 | 1 | 4 |
| 48910-Iurreta | 16 | 2 | 0 | 0 | 3 | 0 | 10 | 1 | 0 | 0 |
| 48050-Izurtza | 17 | 5 | 0 | 3 | 0 | 0 | 0 | 1 | 1 | 7 |
| 48022-Karrantza Harana/Valle de Carranza | 117 | 44 | 9 | 5 | 5 | 2 | 8 | 9 | 16 | 19 |
| 48907-Kortezubi | 16 | 2 | 2 | 6 | 0 | 0 | 1 | 1 | 2 | 2 |
| 48051-Lanestosa | 72 | 2 | 30 | 9 | 3 | 0 | 1 | 19 | 2 | 6 |
| 48052-Larrabetzu | 15 | 9 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 3 |
| 48053-Laukiz | 67 | 1 | 1 | 4 | 5 | 3 | 2 | 35 | 7 | 9 |
| 48054-Leioa | 317 | 9 | 2 | 4 | 7 | 12 | 41 | 135 | 22 | 85 |
| 48057-Lekeitio | 1265 | 306 | 18 | 20 | 24 | 106 | 482 | 178 | 79 | 52 |
| 48055-Lemoa | 69 | 15 | 8 | 5 | 1 | 13 | 7 | 5 | 3 | 12 |
| 48056-Lemoiz | 179 | 15 | 5 | 13 | 28 | 28 | 48 | 24 | 4 | 14 |
| 48081-Lezama | 7 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 4 | 0 |
| 48903-Loiu | 60 | 7 | 2 | 4 | 6 | 5 | 5 | 8 | 11 | 12 |
| 48058-Mallabia | 25 | 5 | 0 | 1 | 1 | 1 | 4 | 2 | 10 | 1 |
| 48060-Markina-Xemein | 36 | 5 | 1 | 0 | 2 | 4 | 11 | 6 | 1 | 6 |
| 48061-Maruri-Jatabe | 38 | 11 | 0 | 0 | 0 | 0 | 2 | 14 | 1 | 10 |
| 48059-Mañaria | 39 | 26 | 1 | 0 | 0 | 0 | 8 | 1 | 1 | 2 |
| 48062-Mendata | 52 | 37 | 5 | 0 | 0 | 0 | 0 | 2 | 3 | 5 |
| 48063-Mendexa | 73 | 10 | 6 | 0 | 1 | 5 | 49 | 1 | 1 | 0 |
| 48064-Meñaka | 77 | 28 | 1 | 3 | 2 | 3 | 2 | 9 | 4 | 25 |
| 48066-Morga | 84 | 50 | 9 | 3 | 1 | 4 | 1 | 0 | 5 | 11 |
| 48068-Mundaka | 636 | 149 | 21 | 7 | 12 | 11 | 131 | 179 | 66 | 60 |
| 48069-Mungia | 521 | 50 | 4 | 7 | 19 | 31 | 116 | 123 | 79 | 92 |
| 48007-Munitibar-Arbatzegi Gerrikaitz | 66 | 41 | 7 | 3 | 0 | 2 | 2 | 2 | 6 | 3 |
| 48908-Murueta | 5 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 3 |
| 48071-Muskiz | 213 | 34 | 20 | 19 | 4 | 21 | 73 | 24 | 5 | 13 |
| 48067-Muxika | 185 | 145 | 12 | 4 | 6 | 10 | 2 | 3 | 1 | 2 |
| 48909-Nabarniz | 16 | 14 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 48073-Ondarroa | 111 | 28 | 1 | 5 | 1 | 2 | 41 | 10 | 22 | 1 |
| 48075-Orozko | 28 | 17 | 3 | 1 | 2 | 1 | 1 | 1 | 0 | 2 |
| 48083-Ortuella | 16 | 5 | 6 | 3 | 0 | 1 | 0 | 1 | 0 | 0 |
| 48072-Otxandio | 76 | 44 | 2 | 0 | 2 | 2 | 9 | 10 | 2 | 5 |
| 48077-Plentzia | 1129 | 23 | 11 | 19 | 88 | 131 | 359 | 203 | 88 | 207 |
| 48078-Portugalete | 148 | 5 | 3 | 7 | 17 | 29 | 34 | 39 | 4 | 10 |
| 48082-Santurtzi | 109 | 0 | 1 | 16 | 10 | 25 | 20 | 16 | 1 | 20 |
| 48084-Sestao | 129 | 13 | 4 | 10 | 4 | 25 | 36 | 31 | 4 | 2 |
| 48904-Sondika | 29 | 2 | 2 | 0 | 0 | 7 | 5 | 8 | 0 | 5 |
| 48085-Sopelana | 854 | 4 | 8 | 19 | 12 | 32 | 113 | 524 | 64 | 78 |
| 48086-Sopuerta | 282 | 114 | 34 | 8 | 1 | 26 | 5 | 28 | 24 | 42 |
| 48076-Sukarrieta | 270 | 44 | 14 | 3 | 4 | 3 | 62 | 54 | 85 | 1 |
| 48087-Trucios-Turtzioz | 61 | 44 | 0 | 0 | 1 | 1 | 0 | 5 | 6 | 4 |
| 48088-Ubide | 36 | 35 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| 48065-Ugao-Miraballes | 17 | 0 | 1 | 1 | 0 | 0 | 1 | 6 | 2 | 6 |
| 48089-Urduliz | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
| 48074-Urduña-Orduña | 188 | 59 | 7 | 8 | 7 | 3 | 17 | 12 | 38 | 37 |
| 48080-Valle de Trápaga-Trapagaran | 78 | 25 | 12 | 12 | 5 | 2 | 7 | 9 | 5 | 1 |
| 48095-Zaldibar | 5 | 2 | 0 | 0 | 0 | 2 | 1 | 0 | 0 | 0 |
| 48096-Zalla | 58 | 5 | 4 | 4 | 5 | 4 | 7 | 8 | 5 | 16 |
| 48905-Zamudio | 32 | 5 | 7 | 0 | 0 | 2 | 5 | 7 | 1 | 5 |
| 48097-Zaratamo | 15 | 1 | 1 | 5 | 0 | 3 | 1 | 0 | 2 | 2 |
| 48024-Zeanuri | 36 | 17 | 6 | 0 | 1 | 2 | 0 | 2 | 4 | 4 |
| 48025-Zeberio | 71 | 54 | 1 | 4 | 0 | 5 | 0 | 2 | 1 | 4 |
| 48913-Zierbena | 108 | 11 | 10 | 3 | 0 | 10 | 8 | 30 | 29 | 7 |