LEGO Harry Potter 40770 Hogwarts Castle: Room of Requirement

LEGO Harry Potter set 40770, Hogwarts Castle: Room of Requirement, depicts the Room of Requirement at Hogwarts Castle. Released in 2025, it contains 203 pieces and belongs to the Harry Potter theme.

This model focuses on a specific Hogwarts location, the Room of Requirement, a setting with a clear role in the Harry Potter story. Within the LEGO Harry Potter range, it is best understood as a compact castle scene rather than a representation of the whole school.

The build uses 203 pieces and includes 1 minifigure: Neville Longbottom, Light Bluish Grey Sweater.

It can serve as a display piece, a play scene, or an addition to an existing LEGO Harry Potter collection. Compared with broader Hogwarts models, it is more focused, adding a single recognizable room and character to the theme and making it easy to place alongside other castle based builds.

Inventory of set 40770

The inventory of set 40770 lists 203 pieces, spare parts excluded: 88 different lots (one shape in one color) for 64 part shapes. The box also contains 19 spare parts, for small elements that are easy to lose.

Colors of set 40770

Main color: tan, making up 30% of the parts, followed by black (19%) and dark tan (7.9%).

Part types

Most common parts in set 40770

59 of the 64 part shapes in this set have their own page on Setopedia, with their colors, element numbers and the other sets that use them. See all LEGO parts

Exclusive parts in set 40770

One part shape in set 40770 appears in no other set in the catalog, most often a printed element, a sticker or a mold specific to the model. If it gets lost, you will need to look for it individually, for example on BrickLink, rather than in another set.

Rebuilding set 40770 from another set

Share of the parts of set 40770 found in each of these similarly sized sets, counting shape, colour and quantity:

No similarly sized set goes above 28%: the model relies on a little-shared assortment, most of which has to be gathered piece by piece.

Size of set 40770 within its line

With 203 pieces, set 40770 ranks #130 out of 186 Harry Potter sets in our database, which have an average of 672 parts. Among the 625 sets released in 2025, it ranks #391. That is less than half the average Harry Potter set size.