DBox for Eric Parry Architects
The City of London's Planning and Transport Committee has approved plans for 1 Undershaft -- what will be the City's tallest skyscraper, standing at the same elevation as Renzo Piano's Shard south of the River Thames.

Height: 309m (1,016ft)
Floors: 73
Architect: Aroland Holdings
DBOX
1 Undershaft will be the City of London's new tallest tower. Developers say it will be 1,016 feet high when built.
DBox for Eric Parry Architects
It will rise above the neighboring skyscrapers in London's financial center: more than 280 feet taller than the triangle-shaped "Cheesegrater" (left) and dome-shaped "Gherkin" (right).
DBOX
The base will be raised 33 feet above the ground to create a new public square below. At the top, there will be a viewing deck that will provide free access to the public, say developers, and "London's highest restaurant."
DBox for Eric Parry Architects
The skyscraper will contain a collaboration with the Museum of London, who will build an education center towards the summit. It will also feature a free viewing platform -- the highest in the UK.
via SL Green Realty Corp
A new tall tower has broken ground in New York City. Named the One Vanderbilt Avenue tower, the building is designed by Kohn Pedersen Fox architects, and construction officially started today. At 1,401 feet tall, upon completion it will be the second tallest building in New York after the One World Trade Center.

Height: 427m (1,401ft)
Architect: Kohn Pedersen Fox
image courtes of emaar / via aurecon group
A new megatall skyscraper will dominate the Dubai skyline. Currently unnamed -- 'The Tower', as it's being referred to by its developers for now -- will be built on the Dubai Creek Harbour, and will be 100m taller than Dubai's Burj Khalifa -- a skyscraper that is currently the tallest building in the world. Megatall buildings are defined by the Council on Tall Buildings and Urban Habitat (CTBUH) as a builidng over 600 meters (1,968 feet) in height.
Height: 928m (3,044ft)
Architect: Santiago Calatrava
image courtes of emaar / via aurecon group
The expected completion date for the structure is 2020.

Height: 928m (3,044ft)
Architect: Santiago Calatrava
image courtes of emaar / via aurecon group
The building will hold ten observation decks in its oval-shaped peak. One deck will offer a 360-degree view of the city.

Height: 928m (3,044ft)
Architect: Santiago Calatrava
istockphoto
Currently world's tallest building, since it was completed in 2010, is the Burj Khalifa. It stands a massive 198 meters (650 feet) above its nearest competitor.

Height: 828m (2717ft)
Floors: 163
Architect: Skidmore, Owings & Merrill
Jeddah Economic Company/Adrian Smith + Gordon Gill Architecture
Another threat to the Burj Khalifa's tallest building title is the Jeddah Tower in Saudi Arabia. The tower is currently under construction and due to top out at 1,000 meters at a cost of $1.23 billion.

Height: 3,280ft
Architect: Adrian Smith + Gordon Gill Architecture
In Feburary, a proposal for a mile-high tower in Tokyo was revealed.
Height: 1,600m (5,250ft)
Architect: Kohn Pefersen Fox Associates and Leslie E Robertson Associates
Kohn Pedersen Fox
The 1,600 meter tower is part of a future city concept named "Next Tokyo 2045," which envisions a floating mega-city in Tokyo Bay.

Height: 1,600m (5,250ft)
Architect: Kohn Pefersen Fox Associates and Leslie E Robertson Associates
Courtesy CIM Group
432 Park Avenue, the tallest all-residential tower in the western hemisphere, opened its doors in December 2015, recently became the hundredth supertall building in the world.

Height: 425.5m (1396ft)
Floors: 85
Architect: Rafael Vinoly, SLCE Architects, LLP
Gensler

Completed in 2015, Asia's tallest building surpasses the Shanghai World Financial Center and the Jin Mao Tower in Shanghai's Pudong district. Estimated to cost $2.4 billion, its completion marked the end of a project in the financial district stretching back to 1993.

Height: 632m (2073ft)
Floors: 128
Architect: Jun Xia, Gensler
FAYEZ NURELDINE/AFP/AFP/Getty Images
Situated close to the Grand Mosque of the holy city of Mecca, the tower complex is one part of the $15 billion King Abdulaziz Endowment Project, seeking to modernize Mecca and accommodate the ever-growing number of pilgrims.

Height: 601m (1972ft)
Floors: 120
Architect: Dar Al-Handasah Architects
STAN HONDA/AFP/AFP/Getty Images
Known as the "Freedom Tower," One World Trade Center stands on part of the site previously occupied by the Twin Towers. It's the highest building in the western hemisphere, and cost $3.9 billion according to Forbes.

Height: 541.3m (1776 ft)
Floors: 94
Architect: Skidmore, Owings & Merrill
Taiwan Tourism
The first skyscraper to break the half-kilometer mark, the world's tallest building between March 2004 and March 2010 is also one of the greenest -- certified LEED platinum in 2011. Designed to withstand the elements, including typhoons, earthquakes and 216 km/h winds, Taipei 101 utilizes a 660-tonne mass damper ball suspended from the 92nd floor, which sways to offset the movement of the building.

Height: 508m (1667ft)
Floors: 101
Architect: C.Y. Lee & Partners
ChinaFotoPress/Getty Image
Construction of Shanghai's third supertall building took 11 years, but the skyscraper dubbed "The Bottle Opener" was met with critical praise and high-end residents when it completed in 2008, including the Park Hyatt Shanghai and offices for Ernst & Young, Morgan Stanley, and BNP Paribas.

Height: 492m (1614.17ft)
Floors: 101
Architect: Kohn Pederson Fox
ANTHONY WALLACE/AFP/AFP/Getty Images
Hong Kong's tallest building has 108 floors -- but walking around it, you'd get a different story. The city's tetraphobia -- the fear of the number four -- means floors with the number have been skipped, and the International Commerce Center is marketed as a 118-story skyscraper.

Height: 484m (1588ft)
Floors: 108
Architect: Kohn Pedersen Fox
Goh Seng Chong/Bloomberg via Getty Images
The joint eighth highest completed skyscraper is still the tallest twin towers in the world. Finished in 1996 and inaugurated in 1999, it's been the site of numerous hair-raising stunts. Felix Baumgartner set a then-BASE jump world record in 1999 by jumping off a window cleaning crane, and in 2009 Frenchman Alain Robert, known as "Spiderman," freeclimbed to the top of Tower Two without safety equipment -- and did so in under two hours.

Height: 451.9m (1483ft)
Floors: 88
Architect: Cesar Pelli
Sun Chen
The architects behind the Burj Khalifa are also responsible for the world's tenth tallest building. Skidmore, Owings & Merrill's Zifeng Tower in Nanjing completed in January 2010 and sits just above the Willis Tower (previously the Sears Tower) in the rankings, eclipsing the SOM-designed Chicago icon by a mere 7.9 meters (26 ft).

Height: 450m (1476ft)
Floors: 66
Architect: Skidmore, Owings & Merrill
Teddy Cross
Completed in March 2016, the Lotte World Tower is Seoul's first supertall skyscraper, and is currently the sixth tallest building in the world.

Height: 556 meters (1824 feet)
Architect: Kohn Pedersen Fox Associates
Wong Tung & Partners
A hotel and office hybrid, this straightforward supertall building by Wong Tung & Partners in Hunan Province's booming capital city is expected to be completed by 2017.

Height: 452 metres (1,482 ft)
Architect: Wong Tung & Partners
E8xE8
The Suzhou IFS is two meters shy of the Changsha tower.
Height: 450 meters (1476 feet)
Architect: Kohn Pedersen Fox Associates
Pei Cobb Freed & Partners
The World One skyscraper in Mumbai will be as tall as the Willis Tower, the second tallest building in North America, and will be one of the world's tallest residential structures.

Height: 442 meters (1450 feet)
Architect: Pei Cobb Freed & Partners
DLN Architects
This design mimics and simplifies the neo-Gothic spires of an earlier skyscraper boom, à la the Woolworth and Empire State Buildings.
Height: 383 meters (1,257 ft)
Architect: Dennis Lau & Ng Chun Man Architects & Engineers
Kohn Pedersen Fox Associates
Kohn Pedersen Fox is back with this 90-story residential building. Zigzagging cuts in the curtain-wall break up the monotony of yet another boxy tower.

Height: 372 metres (1,220 ft)
Architect: Kohn Pedersen Fox
CNN  — 

Some commentators think Brexit will clamp the brakes on growth in the UK. London’s skyline clearly didn’t get the memo. Plans for 1 Undershaft, set to become the City of London’s tallest skyscraper, have been formally approved, paving the way for construction of the 1,016 feet high tower.

Dubbed “The Trellis,” 1 Undershaft will rise to the same height as The Shard – the tallest building in European Union – due to its slightly elevated platform north of the River Thames.

Containing 1.4 million square feet of office space across 73 floors, it will also have restaurants, retail space and an education center in collaboration with the Museum of London. And, unlike The Shard, 1 Undershaft will have a free public viewing gallery at its peak – the UK’s tallest.

From the top the public will have views down on the City, including 30 St Mary Axe, otherwise known as “The Gherkin” and the 122 Leadenhall Street, aka “The Cheesegrater.” 1 Undershaft will tower above 122 Leadenhall Street, at present the tallest building in the city, by a substantial 280 feet.

View this interactive content on CNN.com

The tower, anticipated to open in the next decade, was designed by Eric Parry and commissioned by Singapore-based Aroland Holdings Limited as part of the company’s plan to develop tall buildings in capitals around the world. While the City of London’s Planning and Transport Committee has approved a resolution to grant permission on 1 Undershaft, the design is still subject to a satisfactory Section 106 – an agreement between developers and the local council on the building’s wider impact on the area (i.e. public space or surrounding roads).

“We are delighted,” says Parry. “1 Undershaft represents the very best of British architecture and will set new standards for the City in terms of comfort, quality and environmental sustainability.”

The architect described the decision as “a vote of confidence in the City of London,” at a time when fears abound that a “hard Brexit,” in which Britain would leave the European single market, could threaten the viability of many operations within the City.

Paris and German’s financial hub Frankfurt have been mooted as alternative locations for European headquarters, but investment and a buoyant attitude from the likes of Aroland Holdings may have companies thinking twice before decamping to La Defense or elsewhere.

Make room for the tech giants

Uneasiness may be percolating through parts of the financial sector, but multiple tech giants are doubling down when it comes to real estate in the English capital. Earlier this month Google unveiled plans to build on its King’s Cross campus, northwest of the City.

Google
The exterior shape of Google's Heatherwick Studio/BIG-designed King's Cross headquarters.

The design, a collaboration between Heatherwick Studio and Bjarke Ingels Group (BIG), is firmly under wraps, with only a vague exterior outline released by the internet giant.

What is known is that the 650,000 square foot building will push the company’s total office space to over one million square feet at the 67-acre site – enough room for 7,000 so-called “Googlers.”

The new headquarters – the first wholly owned and designed by Google outside the US – follows the release earlier this year of an updated design for the company’s Mountain View site in California (also designed by Heatherwick and Ingels).

Google CEO Sundar Pichai stressed that the company is “committed to the UK,” while London mayor Sadiq Khan described that commitment as “very welcome,” as well as “demonstrating that London is open to business” – a familiar rallying cry of Khan’s, post-referendum.

Meanwhile Facebook last week announced a hiring spree, increasing the company’s headcount in London by 50%, creating 500 new jobs ahead of a planned move to Fitzrovia in 2017.

Onwards and upwards

1 Undershaft will come as welcome relief for firms battling it out to secure prime office space in London – on average $102 per square foot per annum according to real estate consultancy Knight Frank. It won’t be alone, however.

A report by New London Architecture in March 2016 listed proposals for 119 buildings 20 storeys or more in the previous 12 months, with 89 “tall” buildings under construction at the time.

Time will tell how many proposals survive the post-referendum jitters. If the financial crisis of 2007 showed the architecture world anything, it was that new buildings are among the first investments to fall through.

That being said, one planned skyscraper in the City that looks to be on track is 22 Bishopsgate. PLP Architecture’s 912 feet tower will, for a time, be the tallest in the City. With an estimated completion date of 2019, it’s safe to predict 22 Bishopsgate will have at least a few years in the sun, before being eclipsed by 1 Undershaft.