This is a list of the tallest buildings in the Ottawa—Gatineau urban area that are over 90 m (295 ft) tall. Despite its size, Ottawa–Gatineau does not have many skyscrapers that exceed 100 m (330 ft) compared to other large Canadian cities. Until 1965, buildings in Ottawa were limited to 45.5 metres (149 ft) so that the 92 m (302 ft) tall Peace Tower at the centre of the Parliament Buildings could dominate the skyline.^[1] The National Capital Region has a complicated system of protected view planes that are governed by the National Capital Commission and adhered to by the City of Ottawa and Ville de Gatineau.^[2] Protected view planes limit the height of buildings in certain areas of the downtown cores of Ottawa and Gatineau to protect the prominence of the Parliament Buildings.

The tallest building in Ottawa—Gatineau is the 45-storey, 143 m (469 ft) tall Claridge Icon located in Little Italy. The tallest building approved for construction in Ottawa—Gatineau is the 65-storey, 234 m (768 ft) tall 900 Albert — Tower 1, part of the three-tower 900 Albert Development located in Centretown West.^[3][4][5][6]

This list ranks buildings in Ottawa-Gatineau that stand at least 90 m (300 ft) tall, based on CTBUH height measurement standards. This includes spires and architectural details but does not include antenna masts. Heights are rounded up to the nearest metre from .5. As of July 2023, Ottawa-Gatineau has 18 buildings over 90m constructed, 8 buildings over 90m under construction, 19 more buildings over 90m approved, and 39 more buildings over 90m proposed. The region is currently experiencing the largest highrise building boom in its history. Heights of buildings built in the pre-internet era on this page are measured using Google Earth measurement tools, as previously posted heights of these buildings found elsewhere on the internet are typically sourced from the now defunct site Emporis.com, which had inaccurate data.

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Rank	Building	Image	Location	Height	Floors	Completed	Use	Notes	Ref
1	Claridge Icon		Little Italy	143 m (469 ft)	45	2022	Residential	Tallest building in Ottawa 38th tallest building in Ontario Tallest building in Ontario outside of the Golden Horseshoe	[7]
2	Terrasses de la Chaudière – Tower 1		Hull	117 m (384 ft)	30	1978	Office	Tallest building in Gatineau Tallest building in Ottawa—Gatineau from 1978 to 2019 28th tallest building in Quebec In 2023 a project began to completely replace the precast/brick clad building envelope with glass curtain walls, as well as near total replacement of building interior and systems	[8]
3	Lux Place – Tower C		Cyrville	115 m (377 ft)	35	Under Construction	Residential	Topped out in April 2024	[9]
4	Place de Ville – Tower C		Downtown	112 m (367 ft)	29	1971	Office	Tallest building in Ottawa from 1971 to 2019 Tallest building in Ottawa—Gatineau from 1971 to 1978	[10]
5	Minto Metropole		Westboro	108 m (354 ft)	32	2004	Residential		[11]
6	One60 Elgin		Downtown	107 m (351 ft)	27	1971	Office		[12]
=7	Place du Portage – Tower 1		Hull	106 m (348 ft)	25	1973	Office	2nd Tallest building in Gatineau	[13]
=7	The Dale – Tower 1		Mechanicsville	106 m (348 ft)	33	2022	Residential		[14]
8	East Flats – Phase 4 – Building D		LeBreton Flats	102 m (335 ft)	30	Under Construction	Residential	Topped out in 2023	[15][16]
9	R.H. Coats Building		Tunney's Pasture	99 m (325 ft)	26	1976	Office		[17]
=10	151 O'Connor Street		Downtown	97 m (318 ft)	26	1983	Office		[18]
=11	SoHo Italia		Little Italy	96 m (315 ft)	30	2024	Residential	Topped out in 2022	[19]
=11	Tribeca Tower 1		Centretown	96 m (315 ft)	27	2014	Residential		[20]
=11	Parkdale Collective		Mechanicsville	96 m (315 ft)	31	Under Construction	Residential	Topped out in 2023
12	Ottawa Marriott Hotel		Downtown	94 m (308 ft)	26	1972	Hotel	Briefly became the tallest building in Ottawa-Gatineau during its construction in 1971.	[21]
=13	Minto One80five		Downtown	93 m (305 ft)	30	1989	Residential / Hotel		[22]
=13	The Classics		Riverview	93 m (305 ft)	29	1990	Residential		[23]
=14	Peace Tower		Downtown	92 m (302 ft)	13	1927	Government	Tallest building in Ottawa-Gatineau from 1927 to 1971	[24]
=14	Tribeca Tower 2		Centretown	92 m (302 ft)	27	2014	Residential		[20]
=15	Envie Little Italy Tower 1		Little Italy	91 m (299 ft)	28	2017	Residential		[25]
=15	Performance Court		Downtown	91 m (299ft)	21	2014	Office		[26]
=15	The Dale – Tower 2		Mechanicsville	91 m (299ft)	29	Under construction	Residential	Topped out in 2023	[27]

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• List of buildings in Ottawa
• List of tallest buildings in Canada
• List of tallest buildings in Ontario
• List of tallest buildings in Quebec
• Canadian Centre for Architecture
• Society of Architectural Historians
• Canadian architecture