# List of designated heritage properties in Ottawa

This is a list of properties which have been designated by the City of Ottawa under Part IV of the Ontario Heritage Act as having cultural heritage value or interest. At many properties, a bronze plaque gives a bilingual description of the property's history.
| Property | Address | Ward | Construction Date | Architect |
| 101 Rideau | 101 Rideau Street | Rideau-Vanier | c. 1871 | |
| 108 Acacia | 108 Acacia Avenue | Rideau-Rockcliffe | 1908 | Francis Sullivan |
| 1119 Wellington West | 1119 Wellington Street West | Kitchissippi | c. 1881 | |
| 1134 O'Grady | 1134 O'Grady Street | Rideau-Jock | 1870–1875 | |
| 1137 Mill | 1137 Mill Street | Rideau-Jock | c. 1880 | |
| 126 Rideau | 126 Rideau Street | Rideau-Vanier | 1906–07 | W.E. Noffke |
| 151 Stanley | 151 Stanley Avenue | Rideau-Rockcliffe | 1868 | |
| 154 Britannia | 154 Britannia Road | Bay | c. 1895 | Charles Robinson |
| 156-158 Sparks | 156-158 Sparks Street | Somerset | 1871–72 | |
| 158-160 Guigues | 158-160 Guigues | Rideau-Vanier | 1846 | |
| 163-165 Bolton | 163, 165 Bolton Street | Rideau-Vanier | 1879 | |
| 17 Mariposa | 17 Mariposa Avenue | Rideau-Rockcliffe | c. 1909 | Probably Thomas Coltrin Keefer |
| 175 Britannia | 175 Britannia Road | Bay | c. 1908 | Edward & Albert Murphy |
| 176 Bronson | 176 Bronson Avenue | Somerset | Prior to 1874 | |
| 1820 St. Joseph | 1820 St. Joseph Boulevard | Orléans West-Innes | | |
| 190 Bronson | 190 Bronson Avenue | Somerset | 1889 | |
| 224 Cooper | 224 Cooper Street | Somerset | 1884 | |
| 240 Daly | 240 Daly Avenue | Rideau-Vanier | | |
| 243 Augusta | 243 Augusta Street | Rideau-Vanier | 1866 | |
| 25-29 Crichton | 25, 29 Crichton Street | Rideau-Rockcliffe | c. 1867 | |
| 260 Sunnyside | 260 Sunnyside Avenue | Capital | 1921 | W.E. Noffke |
| 261 O'Connor | 261 O'Connor Street | Somerset | | |
| 273 Wilbrod | 273 Wilbrod Street | Rideau-Vanier | 1892–1893 | |
| 295 Lorne Greene | 295 Lorne Greene Way | Bay | c. 1913 | |
| 301 Metcalfe | 301 Metcalfe Street | Somerset | | Frederick J. Alexander |
| 310 Cooper | 310 Cooper Street | Somerset | 1879–80 | |
| 315 Daly | 315 Daly Avenue | Rideau-Vanier | before 1861 | |
| 333 Laurier | 333 Laurier Avenue West | Somerset | 1890–91 | |
| 339 Pleasant Park | 339 Pleasant Park Road | Alta Vista | 1965 | James W. Strutt |
| 350-352 Cumberland | 350-352 Cumberland | Rideau-Vanier | c. 1860 | |
| 408 Queen | 408 Queen Street | Somerset | 1899 | |
| 46 Cartier | 46 Cartier Street | Somerset | 1901 | |
| 478 Albert | 478 Albert Street | Somerset | c. 1874 | Thomas Seaton Scott (likely) |
| 48 Britannia | 48 Britannia Road | Bay | c. 1863 | |
| 494 Albert | 494 & 504 Albert Street | Somerset | c. 1864 | |
| 5 Blackburn | 5 Blackburn Avenue | Rideau-Vanier | 1905 | |
| 541 Manor | 541 Manor Avenue | Rideau-Rockcliffe | 1900s | |
| 5538 Manotick Main | 5538 Manotick Main Street | Rideau-Jock | | |
| 5562 Manotick Main | 5562 Manotick Main Street | Rideau-Jock | | |
| 6 McLeod | 6 McLeod Street | Somerset | 1907–08 | Weeks and Keefer |
| 7 Delaware | 7 Delaware | Somerset | 1907 | W.E. Noffke |
| 84 Stewart | 84 Stewart Street | Rideau-Vanier | Prior to 1874 | |
| 89 Murray | 89 Murray Street | Rideau-Vanier | 1876 | |
| 89 Rideau | 89 Rideau Street | Rideau-Vanier | Prob. 1910 | |
| Abbotsford House | 950 Bank Street | Capital | c. 1872 | |
| Aberdeen Pavilion | | Capital | 1898 | Moses C. Edey |
| Adams House | 29 Somerset Street West | Somerset | Approx. 1888 | |
| Albion Hotel | 1 Daly Avenue | Rideau-Vanier | 1871 | |
| Alexander Fleck House | 593 Laurier Avenue West | Somerset | 1902 | |
| Allan House (Sandy Hill) | 192 Daly Avenue | Rideau-Vanier | 1893–94 | |
| Allan House (New Edinburgh) | 35 MacKay Street | Rideau-Rockcliffe | Probably 1864–65 | |
| All Saints' Anglican Church | 317 Chapel Street | Rideau-Vanier | 1899–1900 | A.M. Calderon |
| Ambassador Court | 612 Bank Street | Capital | | Werner Noffke |
| Andrew Wilson House / Hayes House | 4971 Dunning Road | Orléans South-Navan | Prior to 1899 | |
| Arbour House | 84 Bradford Street | Bay | 1892–93 | |
| Archbisop's Palace | 145 St. Patrick Street | Rideau-Vanier | 1849 | |
| Armstrong House | 35 Armstrong Street | Kitchissippi | c. 1845 | |
| Ashton General Store | 8981 Flewellyn Road | Rideau-Jock | 1879 | John Summer |
| Ayers Building | 1128 Mill Street | Rideau-Jock | 1902 | |
| Aylen-Heney Cottage | 150 Richmond Road | Kitchissippi | 1830s | |
| Bank of Montreal | 294 Bank Street | Somerset | 1908–1909 | Keefer and Weekes |
| Bank of Nova Scotia Building | 125 Sparks Street | Somerset | 1924–25 | John Lyle |
| Bayne House | 40 Fuller Street | Kitchissippi | 1828 | William Ross |
| Beattie House | 451 Besserer Street | Rideau-Vanier | 1867 | |
| Bell Block | 32-36 Elgin Street | Somerset | 1867 | William Hodgson |
| Bells Corners Union Cemetery | 3851 Old Richmond Road | College | 1853 | |
| Besserer House | 149 Daly Avenue | Rideau-Vanier | 1844 | |
| Bethany Hope Centre | 1140 Wellington Street West | Kitchissippi | 1924 | Horwood and Taylor |
| Bingham-McKellar House | 635 Richmond Road | Bay | 1840s | J. and William Thomson |
| Birkett House | 306 Metcalfe Street | Somerset | 1896 | |
| Billings Estate | 2100 Cabot Street | Alta Vista | 1828 | |
| Booth Barn Complex | 930 Carling Avenue | River | 1867–1890 | |
| Booth House / Laurentian Club | 252 Metcalfe Street | Somerset | 1909 | John H. W. Watts |
| Booth Street Complex | 552 Booth Street | Somerset | 1909–1952 | W.E. Noffke |
| Borbridge Building | 54-60 York Street | Rideau-Vanier | 1875 | William Hodgson |
| Bower House | 3 Bower Street | Capital | 1866–67 | J. C. Bower |
| Boyd House | 173 Huntmar Drive | Stittsville | 1887 | |
| Braclyn House | 3229 Diamondview Road | West Carleton-March | 1858 | |
| Bradley/Craig Homestead | 590 Hazeldean Road | Kanata South | 1870s | |
| Bradley House | 4 Bradley Farm Court | Kanata South | 1903 | |
| Brantwood Place Gates | Main Street (at Beckwith Road) | Capital | 1912 | |
| Broadview Public School | 590 Broadview Avenue | Kitchissippi | 1927 | Richards and Abra |
| Brown Tenements | 153-161 York Street | Rideau-Vanier | c. 1865-1875 | |
| Brûlé House | 288 St. Patrick Street | Rideau-Vanier | c. 1842 | Thomas Brûlé |
| Bryan House | 6700 Rideau Valley Drive South | Rideau-Jock | | |
| Building A, Physical Metallurgy Laboratory | 552 Booth Street | Somerset | 1942–1952 | |
| Building B, Physical Metallurgy Laboratory | 552 Booth Street | Somerset | 1942–1952 | |
| Building E, Physical Metallurgy Laboratory | 552 Booth Street | Somerset | 1942–1952 | |
| Building F, Central Heating Plant | 552 Booth Street | Somerset | 1945 | |
| Building G, Fuel Research Laboratories | 552 Booth Street | Somerset | | |
| Building H, Fuel Research Laboratories | 552 Booth Street | Somerset | | |
| Building M, Ore Dressing and Metallurgical Laboratories | 552 Booth Street | Somerset | 1932 | |
| Building N1, Fuel Testing Building | 552 Booth Street | Somerset | 1911 | |
| Building N2, Hydro-metallurgical Laboratory | 552 Booth Street | Somerset | 1929 | |
| Building N3, Pyre-metallurgical Laboratory | 552 Booth Street | Somerset | 1929 | |
| Building Q, Ore Dressing Laboratory | 552 Booth Street | Somerset | | |
| Building R, Industrial Minerals and Ceramics Laboratory | 552 Booth Street | Somerset | | |
| Burpee House | 22 Rideau Terrace | Rideau-Rockcliffe | c. 1908 | |
| Burritt House | 4390 Donnelly Drive | Rideau-Jock | | |
| Butler House | 1445 St. Joseph Boulevard | Orléans West | Early 19th century | |
| Butterworth House | 324 Somerset Street West | Somerset | 1894 | Probably James A. Corry |
| Byward Market Building | 50 York Street | Rideau-Vanier | 1927 | |
| Caiger House | 1126 O'Grady Street | Rideau-Jock | | |
| Cameron House (Clendenan House) | 2226 Old Montreal Road | Orléans East-Cumberland | Prior to 1851 | |
| Capital Wire Cloth Company | 7 Hinton Avenue | Kitchissippi | 1912 to 1948 | |
| Captain Stephen Collins House | 3436 Prince of Wales Drive | Barrhaven East | Approx. 1830 | |
| Carkner Lumber Mill | 9047 Carkner Street | Osgoode | 1874 | |
| Carleton County Court House | 2 Daly Avenue | Rideau-Vanier | 1870–71 | Robert Surtees |
| Carleton County Gaol | 75 Nicholas Street | Rideau-Vanier | 1862 | H. H. Horsey |
| Carleton County Registry Office | 22 Daly Avenue | Rideau-Vanier | 1871 | |
| Carp Agricultural Hall | 3790 Carp Road | West Carleton-March | | |
| Cartier Square Drill Hall | 2 Queen Elizabeth Driveway | Somerset | 1879 | Thomas Seaton Scott |
| Casa Loma | 9 Crescent Road | Rideau-Rockcliffe | 1911 | Allan Keefer, A.J. Hazelgrove |
| Central Chambers | 38-54 Elgin Street | Somerset | 1890 | John James Browne |
| Central Emergency Headquarters | 2389 Carp Road | West Carleton-March | 1959–1961 | |
| Central Park | 630 Bank Street | Capital | 1912 | Frederick Todd |
| Charles Billings House | 187 Billings Avenue | Alta Vista | | Braddish Billings and family |
| Chamberlain House | 328 Somerset Street West | Somerset | 1894 | |
| Champagne Bath | 321 King Edward Avenue | Rideau-Vanier | 1921–1924 | W.E. Noffke |
| Champlain Oil Service Centre | 70 Richmond Road | Kitchissippi | | |
| Chapel of the Holy Spirit, All Saints' Anglican Church | 347 Richmond Road | Kitchissippi | 1865–1872 | Thomas Fuller |
| Charles Smith/ James Smith House | 72 Steeple Hill Crescent | Rideau-Jock | c. 1830 | |
| Château Laurier | 1 Rideau Street | Rideau-Vanier | 1908–1912 | Bradford Lee Gilbert, Ross and MacFarlane |
| Chelsea Club | 236 Metcalfe Street | Somerset | 1884 | |
| Christ Church Cathedral | 439 Queen Street | Somerset | 1872 | King Arnoldi |
| Church of St. Luke's | 760 Somerset Street West | Somerset | 1922 | Colin Drewitt |
| Cinnamon House | 6564 Prince of Wales Drive | Rideau-Jock | | Boyd Brothers |
| City of Ottawa Workshops | 7 Bayview Station Road | Kitchissippi | 1941 | Joseph Holmes Irvine |
| City Registry Office | 70 Nicholas Street | Rideau-Vanier | 1874 | |
| City Waterworks Building and Aqueduct | 10 Fleet Street | Somerset | 1873–74 | Thomas Keefer |
| Clarke House | 43 Gilmour Street | Somerset | 1898 | |
| Clearview | 2607 Old Montreal Road | Orléans East-Cumberland | | |
| Clegg-Feller Building | 155 Rideau Street | Rideau-Vanier | 1864 | |
| Cobble Cottage | 420 Kenwood Avenue | Kitchissippi | | |
| Connaught Building | 555 Mackenzie Avenue | Rideau-Vanier | 1913–1914 | David Ewart |
| Connors House | 166 Huron Avenue | Kitchissippi | | Francis C. Sullivan |
| Courtney House | 245 Laurier Avenue East | Rideau-Vanier | About 1875 | |
| Crichton Lodge | 1160 Lisgar Road | Rideau-Rockcliffe | 1887 | Thomas Clarke |
| Crichton Street School | 200 Chrichton Street | Rideau-Rockcliffe | 1906; 1919 | William B. Garvock |
| Cumberland Heritage Village Museum | 2940 Old Montreal Road | Orléans East-Cumberland | | |
| Deschâtelets Building | 60 Oblats Avenue | Capital | 1885 | M. Mesnard |
| Dennis Bergan House | 3697 Jockvale Road | Barrhaven West | 1892 | |
| Devonshire Community Public School | 100 Breezehill Avenue | Kitchissippi | 1910 | |
| Diamond Methodist Church | 3303 Diamondview Road | West Carleton-March | 1865 | |
| Dickinson Square | 1127 Mill Street | Rideau-Jock | 1859–60 (Mill); 1868 (House) | |
| Dibb House | 3150 Donnelly Drive | Rideau-Jock | 1871–79 | |
| Dr. Robert Law House | 190 Laurier Avenue East | Rideau-Vanier | c. 1886 | |
| Drummond Presbyterian Church | 2027 Roberston Drive | College | 1898 | |
| Dwyer Hill Roman Catholic Burial Ground | O'Neil Road | Rideau-Jock | | |
| Earnscliffe | 140 Sussex | Rideau-Vanier | 1855–57 | |
| Echo-Bank House | 700 Echo Drive | Capital | 1865 | |
| École Guigues | 159 Murray Street | Rideau-Vanier | 1904–1905 | |
| École St-Pierre | 353 Friel Street | Rideau-Vanier | 1906 | Felix Maral Hamel |
| Edward Monaghan House | 5100 Fallowfield Road | Rideau-Jock | 1886 | Edward Monaghan |
| Église Adventiste Francophone d'Ottawa / Former Adath Jeshurun Synagogue | 375 King Edward Avenue | Rideau-Vanier | 1904 | John W.H. Watts |
| Embassy of Armenia | 7 Delaware Avenue | Somerset | 1907 | |
| Embassy of Turkey / Children's Hospital | 197-199 Wurtemberg Street | Rideau-Vanier | 1869 | |
| Engel House | 2306 Relin Way | Rideau-Jock | | |
| Ewart House | 464 Besserer Street | Rideau-Vanier | 1873–74 | |
| Fairfields | 3080 Richmond Road | Bay | 1870 | |
| Fallowfield United Church | 119 Steeple Hill Crescent | Rideau-Jock | 1886 | |
| Featherstone Building | 103, 105 Rideau Street | Rideau-Vanier | c. 1869 | |
| First Avenue Public School | 73 First Avenue | Capital | 1898 | E. L. Horwood |
| First Baptist Church | 140 Laurier Avenue West | Somerset | 1877 | |
| Flavien Rochon House | 138 St. Patrick Street | Rideau-Vanier | 1832 or mid-1840s | |
| Fleck House | 500 Wilbrod Street | Rideau-Vanier | 1901–02 | J. W. H. Watts |
| Flewellyn/Jones House | 5897 Fernbank Road | Stittsville | late 19th century | |
| Foisey House | 188 St. Andrew Street | Rideau-Vanier | 1860 | |
| Former école Sacré-Cœur | 19 Melrose Avenue | Kitchissippi | 1912 | Francis Sullivan |
| Former Osgoode Township Hall | 8243 Victoria Street | Osgoode | 1891 | James Mather |
| Former Ottawa City Hall / John G. Diefenbaker Building | 111 Sussex Drive | Rideau-Vanier | 1957 | Bland, Rother and Trudeau |
| Former Skead's Mills Methodist Church | 307 Richmond Road | Kitchissippi | 1898 | |
| Fraser Schoolhouse | 47 Sussex Drive | Rideau-Rockcliffe | 1837 | |
| Frechette House | 87 MacKay Street | Rideau-Rockcliffe | c. 1877 | |
| Fry House | 4148 Donnelly Drive | Rideau-Jock | c. 1867 | |
| Gamman House | 306 Cyr Avenue | Rideau-Vanier | 1873 | |
| Garrett House | 51 Chrichton Street | Rideau-Rockcliffe | Prior to 1874 | |
| Garvock House | 139 Crichton Street | Rideau-Rockcliffe | 1874 | Alexander Garvock |
| Gilkinson's Barn | 8724 McCaffrey Trail | Rideau-Jock | About 1910 | |
| Gilroy Farm | 7406 Gilroy Road | Rideau-Jock | By 1861 | |
| Glebe Collegiate Institute | 212 Glebe Avenue | Capital | 1921–1923 | John Albert Ewart |
| Glebe Community Centre/St. Paul's Methodist Church/St. James' United Church | 175 Third Avenue | Capital | 1914–1924 | Clarence J. Burritt |
| Goodwin House | 312 Laurier Avenue East | Rideau-Vanier | 1900 | |
| Graham-McGillivray Building | 419-423 Sussex Drive | Rideau-Vanier | c. 1866 | |
| Grant House | 150 Elgin Street | Somerset | 1875 | Braddish Billings III |
| Grant School | 2720 Richmond Road | Bay | 1922 | |
| Grand Central Hotel | 74 George Street | Rideau-Vanier | 1876 | |
| Grayburn House | 284-286 Stewart Street | Rideau-Vanier | Approx. 1875–76 | |
| Green House | 174, 176 King Edward Avenue | Rideau-Vanier | Prior to 1873 | |
| Green's Hotel | 1510 Stittsville Main Street | Stittsville | 1890 | |
| Grierson Residence | 486 Hazeldean Road | Kanata South | | |
| Hackett House | 2659 Roger Stevens Drive | Rideau-Jock | | |
| Harrison House | 6576 Fourth Line Road | Rideau-Jock | | |
| Hartin Hotel | 1993 Robertson Road | College | | David Hartin |
| Hart Massey House | 400 Lansdowne Road | Rideau-Rockcliffe | | Hart Massey |
| Henderson House | 34 Alexander Street | Rideau-Rockcliffe | 1864–65 | |
| Hintonburg Pumping Station | 5 Onigam Street | Kitchissippi | Before 1900 | |
| Hobbs House | 7809 Bleeks Road | Rideau-Jock | before 1863 | |
| Hollywood Parade | 103, 105, 107, 109, 111, 113 James Street | Somerset | 1893 | |
| Horticulture Building | 957 Bank Street | Capital | 1914 | Francis C. Sullivan |
| Hunt House | 149 Hopewell Avenue | Capital | 1898 | |
| Hutcheson House | 406 Queen Street | Somerset | 1899 | |
| Hydro Sub-Station No. 2 | 247 Glebe Avenue | Capital | | John E. Brown & W. C. Beattie |
| Hydro Sub-Station No. 3 | 1275 Carling Avenue | Kitchissippi | | William C. Beattie |
| Hydro Sub-Station No. 4 | 351 King Edward Avenue | Rideau-Vanier | | William C. Beattie |
| Hydro Sub-Station No. 5 | 39 Riverdale Avenue | Capital | | J. Albert Ewart |
| Institut canadien français d'Ottawa | 18 York Street | Rideau-Vanier | 1876 | J.P.M. Lecourt |
| James Dupuis House | 6722 Rideau Valley Drive South | Rideau-Jock | | |
| James Fleck House | 404 Queen Street | Somerset | 1894 | |
| James Long House | 28 Long Gate Court | Barrhaven East | 1900–1903 | James Long |
| Jarvis House | 65 Stewart Street | Rideau-Vanier | 1885 | |
| Jones House | 119 Stanley Avenue | Rideau-Rockliffe | Prior to 1892 | |
| Kemp's Tavern | 5816 Hazeldean Road | Stittsville | 1868 | |
| Kilmorie | 21 Withrow Avenue | College | Between 1840 and 1850 | |
| Langevin Block | 80 Wellington Street | Somerset | 1884 | Thomas Fuller |
| Lansdowne Terrace | 157, 159, 161, 163, 165, 167 MacKay Street | Rideau-Rockcliffe | c. 1876 | |
| Laurier House | 335 Laurier Avenue East | Rideau-Vanier | 1878 | |
| Laws House | 2087 Riverside Drive | Alta Vista | Between 1830 and 1840 | Braddish Billings |
| Lincez House | 1130 O'Grady Street | Rideau-Jock | | |
| Lindsay House | 6840 Rideau Valley Drive South | Rideau-Jock | 1850 | |
| Lipsett House | 37 Oriole Drive | Beacon Hill-Cyrville | | |
| Lisgar Collegiate, North Building | 29 Lisgar Avenue | Somerset | 1874 | |
| Lyon House | 112 Daly Avenue | Rideau-Vanier | c. 1850 | |
| Macdonald Gardens Park | 99 Cobourg Street | Rideau-Vanier | | Frederick Todd |
| MacKay United Church | 257 MacKay Street | Rideau-Rockcliffe | 1909 | H. F. Ballantyne |
| Magee House / HMCS ByTown Officers' Mess | 78 Lisgar Street | Somerset | | Mathew Sheard |
| Maguire House (Fourth Line Road) | 6607 Fourth Line Road | Rideau-Jock | | |
| Maguire House (Roger Stevens Drive) | 2323 Roger Stevens Drive | Rideau-Jock | | |
| Maison Côté | 213 Wilbrod Street | Rideau-Vanier | c. 1867 | |
| Maison Jeanne d'Arc | 362, 364 Kenwood Avenue | Kitchissippi | 1934 | Mère Marie Thomas D'Aquin |
| Maison Joseph Archambault | 117 St. Andrew Street | Rideau-Vanier | c. 1887 | |
| Maison Mère des Sœurs Grises de la croix | 9 Bruyère Street | Rideau-Vanier | 1849–50; 1867 | Antoine Robillard |
| Maison Odillon Archambault | 221-223 St. Andrew Street | Rideau-Vanier | 1895 | Odillon Archambault |
| Manotick United Church | 5567 Manotick Main Street | Rideau-Jock | 1903 | |
| Maplelawn | 529 Richmond Road | Bay | 1831 | |
| March House Restaurant | 806 March Road | Kanata North | 1850s | |
| Marlborough Township Hall | 3048 Pierce Road | Rideau-Jock | 1855 | Robert Mackey |
| Martineau's Hotel | 55 Murray Street | Rideau-Vanier | 1871–72 | Eugène Martineau |
| Mason House | 101 Bayswater Avenue | Kitchissippi | 1891 | Robert Mason |
| Mayfair Theatre | 1074 Bank Street | Capital | 1932 | |
| McAuliffe House | 182, 184 Lisgar Street | Somerset | 1906 | William McAuliffe |
| McCloy House | 42 Bolton Street | Rideau-Vanier | c. 1871 | |
| McFadden House | 5561 Manotick Main Street | Rideau-Jock | | |
| McFarlance Terrace | 199, 201, 205 Daly Avenue | Rideau-Vanier | 1868 | |
| McLeod House | 92 Stanley Avenue | Rideau-Rockcliffe | c. 1867 | |
| McManus House | 4435 Donnelly Drive | Rideau-Jock | before 1863 | |
| Medical Arts Building | 180 Metcalfe Street | Somerset | 1928 | W. E. Noffke |
| Merivale United Church and Cemetery | 1876 Merivale Road | Knoxdale-Merivale | 1876 | |
| Minor House | 6732 Waterloo Street | Rideau-Jock | | |
| Minto Bridges | Union Street | Rideau-Vanier / Rideau-Rockcliffe | 1900–1902 | R. Surtees |
| Mitron House | 62 Sweetland Avenue | Rideau-Vanier | 1985 | Sarah and Andrew Mitrow |
| Monastère des Sœurs de la Visitation Sainte-Marie d'Ottawa | 114 Richmond Road | Kitchissippi | 1864–65; 1913 | Sidney Bowles Fripp |
| Monastère du Précieux Sang / Royal College of Physicians and Surgeons | 774 Echo Rive | Capital | 1914–1923 | Alphonse Content |
| Mulligan's School S.S. No. 1 Huntley / The Cheshire Cat Pub | 2193 Richardson Side Road | West Carleton-March | 1883 | |
| Mutchmor Public School | 185 Fifth Avenue | Capital | 1895 | E. L. Horwood |
| Nagel House | 77 Gloucester Street | Somerset | 1872 | |
| Nepean Town Hall | 345 Richmond Road | Kitchissippi | 1896 | |
| North Gower Old Town Hall | 6581 Fourth Line Road | Rideau-Jock | 1876 | |
| Notre Dame Basilica | 375-385 Sussex Drive | Rideau-Vanier | 1846 | Antoine Robillard and Father John Francis Cannon |
| Oakleigh | 1038 Oak Creek Road | West Carleton-March | Late 1850s | Unknown |
| O'Connor House | 2944 Pierce Road | Rideau-Jock | | |
| O'Connor Street Bridge | O'Connor Street (at Patterson Creek) | Capital | 1907 | Francis Conroy Sullivan |
| Odell House | 180 Waller Street | Rideau-Vanier | 1883–84 | |
| Old Anglican Christ Church Ashton | 8938 Flewellyn Road | Rideau-Jock | 1845 | |
| Old Canadian War Museum | Sussex Drive | Rideau-Vanier | 1904-1906 | David Ewart |
| Old Forge | 2730 Carling Avenue | River | c. 1830 | |
| Old St. Mary's Anglican Church and Cemetery | 269 Pinhey's Point Road | West Carleton-March | Between 1825–27 | |
| Old St. Stephen's Church | 181 Britannia Road | Bay | 1892 | |
| Old Wilson House | 2800 Old Montreal Road | Orléans East-Cumberland | Prior to 1861 | |
| Ottawa East Town Hall | 61 Main Street | Capital | 1895 | |
| Ottawa Electric Railway Sub-Station | 340 Holland Avenue | Kitchissippi | 1924 | D. J. Spence |
| Ottawa Hydro Electric Company Building | 109 Bank Street | Somerset | 1934? | W. C. Beattie |
| Ottawa Ladies' College | 268 First Avenue | Capital | 1912–1914 | Allan Keefer |
| Ottawa Marble and Granite Works | 14 Waller Street | Rideau-Vanier | 1866 | |
| Ottawa New Edinburgh Club | 501 Sir George-Étienne Cartier Parkway | Rideau-Rockcliffe | 1914 | C.P. Meredith |
| Ottawa Normal School | 195 Elgin Street | Somerset | 1874 | |
| Ottawa Rowing Club Boathouse | 8, 10 Lady Grey Drive | Rideau-Vanier | 1898 | |
| Ottawa Tennis and Lawn Bowling Club | 176 Cameron Avenue | Capital | | |
| Overbrook Public School | 149 King George Street | Rideau-Rockcliffe | 1916 | Millson and Burgess |
| Parkdale Fire Station | 424 Parkdale Avenue | Kitchissippi | 1924 | Millson, Burgess, and Hazelgrove |
| Pattee/Freiman House | 149 Somerset Street West | Somerset | 1891 | |
| Patterson House | 336 Daly Avenue | Rideau-Vanier | 1869–70 | |
| Patrick Waters House | 20 Stone House Court | Barrhaven West | 1885 | Patrick Waters |
| Peter Pritchard House | 5559 Manotick Main Street | Rideau-Jock | early 1880s | |
| Philomene Terrace | 363, 365, 369, 371, 375, 377, 381, 383 Daly Avenue | Rideau-Vanier | 1874–75 | Honore Robillard |
| Pinard House | 175 King Edward Avenue | Rideau-Vanier | Probably 1866 | |
| Pinhey Cottage | 5029 Dunrobin Road | West Carleton-March | 1820s | |
| Pinhey's Point Historic Site | 270 Pinhey's Point Road | West Carleton-March | | |
| Plant Bath | 930 Somerset Street West | Somerset | 1924 | Millson, Burgess and Hazelgrove |
| Plummer House | 229 Chapel Street | Rideau-Vanier | 1875 | Horsey and Sheard |
| Pooley's Bridge | 9 Fleet Street | Somerset | 1872 | George Hugo Perry |
| Pope House | 275 MacLaren Street | Somerset | 1880s | |
| Porter's Island Bridge | – | Rideau-Vanier | | Robert Surtees |
| Powell House | 85 Glebe Avenue | Capital | 1912 | W.E. Noffke |
| Powers House | 429 Bay Street | Somerset | c. 1887 | Francis C. Sullivan (reconstruction) |
| Presbyterian Manse | 108 Falldown Lane | West Carleton-March | 1902 | |
| Presley House | 6295 Fourth Line Road | Rideau-Jock | c. 1870–77 | |
| Puddicombe House | 410 Queen Street | Somerset | 1899 | |
| Queale Terrace | 304, 306, 308, 310, 312 Queen Elizabeth Driveway | Capital | 1906 | |
| Quinn's Row | 245, 247, 249, 251 Nepean Street | Somerset | c. 1889 | |
| Rathier House | 193, 195 Cumberland Street | Rideau-Vanier | c. 1862 | |
| Reagan House | 66-68 Stewart Street | Rideau-Vanier | Prior to 1866 | |
| Reilly Blacksmith Shop | 7347 Franktown Road | Rideau-Jock | 1845 | Thomas Reilly |
| Residence Brousseau | 204-210 St. Patrick Street | Rideau-Vanier | 1898 | |
| Richardson Farmhouse | 185 Boundstone Way | Kanata North | c. 1871 | |
| Richelieu Park | 300 Pères-Blancs Avenue | Rideau-Vanier | 1938 | |
| Rideau Branch, Ottawa Public Library | 377 Rideau Street | Rideau-Vanier | 1934 | J.P. MacLaren |
| Rideau Hotel | 91, 93, 95 Rideau Street | Rideau-Vanier | 1900–01 | |
| Robertson House | 32 Cameron Avenue | Capital | c. 1887 | |
| Robinson-Birkett Building | 107 Rideau Street | Rideau-Vanier | 1879 | |
| Rochon House | 150 St. Patrick Street | Rideau-Vanier | 1898 | Oscar Beaudry |
| Rocque House | 276 Bruyère Street | Rideau-Vanier | 1865–69 | |
| Ross House | 188-192 Stewart Street | Rideau-Vanier | 1869 | |
| Rowatt House | 66 Bradford Street | Bay | c. 1878 | |
| Rutherford House | 4515 9th Line Road | Osgoode | c. 1855 | |
| Savery Home | 3856 Loggers Way | West Carleton-March | 1833 | Thomas Fraser |
| School Section No 1 | 400 Goldridge Drive | Kanata North | 1886 | |
| School Section No. 10, Nepean (Jockvale School) | 3131 Jockvale Road | Barrhaven West | 1906 | |
| School Section No. 13, Gloucester (Ramsayville School) | 3455 Ramsayville Road | Gloucester-Southgate | 1894 | |
| School Section No. 13, Nepean (Merivale School) | 51 Slack Road | Knoxdale-Merivale | 1895–1900 | |
| School Section No. 3, Nepean (Mosgrove School) | 2976 Richmond Road | Bay | 1887 | |
| Scott House | 7668 Franktown Road | Rideau-Jock | c. 1850 | |
| Scottish Ontario Chambers/Trust Block | 42-50 Sparks Street | Somerset | 1883 | William Hodgson |
| Shirreff Log Home | 2337 Fitzroy Street | West Carleton-March | 1855 | |
| Shouldice Hotel | 62-66 York Street | Rideau-Vanier | 1846 | |
| Simard House | 31 Sweetland Avenue | Rideau-Vanier | 1884 | Olivier Simard |
| Snowdon House | 66 Lisgar Street | Somerset | 1891 | |
| Stadacona Hall | 395 Laurier Avenue East | Rideau-Vanier | 1871 | |
| St. Alban the Martyr Anglican Church | 125 Daly Avenue | Rideau-Vanier | 1867 | King Arnoldi |
| Standard Bread Company | 951 Gladstone Avenue | Kitchissippi | 1924 | Sydney Comber |
| St. Andrew's Presbyterian Church (Kilmaurs) | 1325 Kilmaurs Side Road | West Carleton-March | 1886 | |
| St. Andrew's Presbyterian Church (Ottawa) | 82 Kent Street | Somerset | 1872 | |
| St. Anne's Church | 528 Old St. Patrick Street | Rideau-Vanier | 1873 | J.P. LeCourt |
| St. Anne's Rectory | 17 Myrand Avenue | Rideau-Vanier | 1921 | W.E. Noffke |
| St. Augustine's Church | 100 Huxley Street | West Carleton-March | 1901–1902 | John W. H. Watts |
| St. Bartholomew's Anglican Church | 125 MacKay Street | Rideau-Rockcliffe | 1868 | Thomas Seaton Scott |
| St. Brigid's Church | 314 St. Patrick Street | Rideau-Vanier | 1889–1890 | John R. Bowes |
| St. Charles Church | 135 Barrette Street | Rideau-Vanier | | Charles Brodeur |
| St. Charles School | 24 Springfield Road | Rideau-Rockcliffe | 1910 | Moses Edey |
| St. Clare's Catholic Church | 4009 Dwyer Hill Road | Rideau-Jock | 1915 | Francis Sullivan |
| St. James Tennis Club | | Capital | 1907 | |
| St. John's Anglican Church and Rectory | 325 Sandhill Road | Kanata North | 1839 | Alexander Christie |
| St. John's Anglican Church Cemetery | 1890 Merivale Road | Knoxdale-Merivale | 1874 | |
| St. Louis Hotel | 39-41 York Street | Rideau-Vanier | 1875 | |
| St. Louis House | 1579 Washington Street | Rideau-Jock | | |
| St. Patrick's Roman Catholic Church | 240 Kent Street | Somerset | 1869–1873 | King Arnoldi |
| St. Patrick's Church, Rectory and Cemetery | 15 Steeple Hill Crescent | Rideau-Jock | 1866 | |
| St. Paul's Eastern United Church | Corners of Daly and Cumberland Streets | Rideau-Vanier | 1888 | |
| St. Paul's Evangelical Lutheran Church | 208 Wilbrod Street | Rideau-Vanier | 1899; 1948 | Adam Harvey; W. E. Noffke |
| Sullivan House | 346 Somerset Street East | Rideau-Vanier | 1914 | Francis Sullivan |
| The Atwood | 97, 99 Rideau Street | Rideau-Vanier | 1908 | |
| The Duncannon | 216 Metcalfe Street | Somerset | 1931 | Cecil Burgess |
| The Shefford | 300 Cooper Street | Somerset | 1912 | |
| The Strathcona | 404 Laurier Avenue East | Rideau-Vanier | 1926–27 | |
| Thomas Nelson House | 41 Beaver Ridge | Knoxdale-Merivale | c. 1850 | Thomas Nelson |
| Thomson House | 6727 Lord Nelson Street | Rideau-Jock | | J. Adam Eastman |
| Toller House | Corner of Chapel and Daly Streets | Rideau-Vanier | 1875 | |
| Town Hall, March Township | 821 March Road | Kanata North | 1901 | Humphrey Gow |
| Transportation Building | 10 Rideau Street | Rideau-Vanier | 1916 | J. Albert Ewart |
| Trinity United Church | 6656 Rideau Valley Drive South | Rideau-Jock | 1894 | |
| Tupper House of Thunderwood Farm | 6713 Second Line Road | Rideau-Jock | 1850s | John O'Callaghan |
| Union Bank of Canada Building | 128 Wellington Street | Somerset | 1888 | |
| Union Mission Building | 47 Daly Avenue | Rideau-Vanier | 1861–62 | Wilhelm Rahe |
| Union Station | 2 Rideau Street | Rideau-Vanier | 1909–12 | Bradford Gilbert; Ross and MacFarlane |
| Valade House | 142 St. Patrick Street | Rideau-Vanier | pre-1866 | |
| Varin Row | 106, 108, 110 Daly Avenue | Rideau-Vanier | 1870 | Charles Varin |
| Venn House | 69 Elm Street | Somerset | 1900–02 | |
| Victoria Memorial Museum | 240 McLeod Street | Somerset | 1905–1912 | David Ewart |
| Wallace Farm House / Tierney House | 5519 Old Richmond Road | Rideau-Jock | 19th Century | |
| Wallis House | 589 Rideau Street | Rideau-Vanier | 1873–75 | Robert Surtees |
| Weatherhead House | 6924 Gallagher Road | Rideau-Jock | c. 1857 | |
| Weaver's House | 1131 Mill Street | Rideau-Jock | | |
| White House | 132 Stewart Street | Rideau-Vanier | 1874–75 | |
| William Murphy House | 127 Britannia Road | Bay | | |
| Williams House | 96 Southern Drive | Capital | About 1827 | |
| Winterholme | 309 Daly Avnue | Rideau-Vanier | 1865 | |
| Woodburn House | 73, 75 MacKay Street | Rideau-Rockcliffe | c. 1874 | |
| York Street Public School | 310 York Street | Rideau-Vanier | 1921 | William C. Beattie |
| Youville Farm | 1811 St. Joseph Boulevard | Orléans West-Innes | 1885 | |