Reading a lot? Reading a lot?
SKYDB services
Get export credits Wrongly blocked?
SKYDB

SKYDB Building database

Tall buildings worldwide, with heights, construction status and the companies involved.

Rankings of tall buildings

Tall Building Markets

  • Global building statistics
  • Biggest cities worldwide
  • Country market overviews
  • Construction activity
  • Annual completions
Speaker at a lectern in front of a skyscraper presentation

SKYDB Awards

The community is honoring the best new skyscrapers. A legacy since 1999.

View award winners

SKYDB Membership

Create a free account, choose Premium or apply to contribute as a volunteering Editor.

Choose your access

SKYDB Community

SKYDB Editors visiting a skyscraper construction site

Join for free

Become a volunteering Editor optionally or get Editor rights with Premium.

Compare memberships

SKYDB Products

Professional building research, data exports and API access, plus advertising offerings.

Research & data

Consulting & advertising

SKYDB Insights charts showing buildings by decade, status, use, floor count and height

SKYDB Insights

Professional research into buildings and participating companies.

View Insights plans

Tall buildings, tracked.

SKYDB is collecting verifiable information about buildings.

About SKYDB

Using SKYDB

Chongqing skyline beside the river

Who we are

SKYDB is the source for tall building information worldwide.

About SKYDB

Interactive building map

Explore all projects on an interactive map anywhere on earth.

Free map access

Upgrade your map experience

SKYDB map with building pins and a building record in Lower Manhattan

Join SKYDB

The map is for registered members. Create a free account to explore.

Create a free account
definition strict definition

flat roof

A roof with no slope greater than 10 degrees or major projecting features, allowing small parapets, vents, skylights, and chimneys.

A flat roof is a roof without any slope greater than 10 degrees, and without any ornamentation, mechanical penthouses, or other architectural features rising above it. A small cornice or parapet around the edge, small vents or skylights, or chimneys do not interfere with a roof's qualification as flat.

If a building has a mechanical floor at the top, which is set back from the perimeter of the floors below, and the roof below that is flat, then it is classified as a flat roof with box(es).

A gabled, hipped, pyramidal, or sloping roof with an extremely shallow slope (10 degrees or less) is considered a flat roof.