- Number of sets created – 588
- Biggest set – the Ministry of Magic
- Longest Standing set – The Great Hall, used from the first film till the last.
- One year a storm with 100mph wind gusts took the roof off A-Stage and the Flight Shed at Leavesden, but none of the exterior sets sustained any major damage.
- Hagrid"s Hut was taken down at Leavesden and transported and rebuilt 2000 ft. up a mountain in Scotland for scenes in Prisoner of Azkaban.
- A 1/3 miniature of The Burrow was created just to be burnt down, when Death Eaters set it on fire in Half-Blood Prince. It took 14 weeks to make.and 6 minutes to burn down.
- The Harry Potter art department contained a team of 58 people working full time. Over 10 years they produced some amazing work, but also produced 35 babies!
- Leavesden Studios was originally built as an aerodrome in 1940. Many airplanes were built there at the tail end of World War II.
- As it is an old aerodrome, none of the stages are soundproofed.
- The 200 acre Studio houses over ' million square feet of covered production space and nine giant stages in excess of 145,000 sq. ft. The runway is 3000 feet long.
- In 1966, Rolls Royce took over the site to produce aircraft engines.
- Apart from the Potter series, movies filmed here include; Sleepy Hollow, Golden Eye, Star Wars Episode 1 The Phantom Menace and Mortal Kombat Annihilation
Leavesden Stages and some of the sets they have housed:
Stage A: The Burrow, Grey Lady Corridor, Dragon Arena, Hogsmeade Village
Stage C: The Trail Room
Stage D: Europe"s biggest underwater tank was built here for the Tri-Wizard Cup. The frozen pond was also filmed here, which Harry dives into to retrieve Gryffindor's sword.
Stage F: The Room of Requirement in Deathly Hallows, as well as a broom rig and various other special effects rigs.
Stage G: A broom rig for flying
Stage H and I: The Ministry of Magic and the Lestrange Vault at Gringotts Bank.