How many parts to go?
Can you build this from what you own?
Just pick the sets you own — see this set's completion rate and missing parts instantly.
“Knockturn Alley” is LEGO® “Harry Potter” theme set number 4720. Released in 2003, it has 211 pieces. With Re:GO you can automatically work out what percentage of this set you can build from the LEGO parts you already own, along with the missing parts and an estimated cost. Use the links below to compare prices on Amazon, Rakuten, Yahoo! Shopping, Mercari and Yahoo! Auctions, and find the best deal on new, used, or individual parts.
Part breakdown 90 types
Color split (most first)
Black×76
Sand Blue×50
Dark Gray×36
Dark Blue×11
Light Gray×9
Trans-Green×4
Trans-Red×3
Trans-Neon Green×3
White×3
Trans-Neon Orange×2
Red×2
Trans-Purple×1
Main parts (most used first)
3062b Brick Round 1 x 1 Open Stud
Black · ×18
3039 Slope 45° 2 x 2
Dark Gray · ×8
3660 Slope Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]
Sand Blue · ×8
3004 Brick 1 x 2
Black · ×6
3005 Brick 1 x 1
Dark Gray · ×6
3062b Brick Round 1 x 1 Open Stud
Sand Blue · ×6
3004 Brick 1 x 2
Sand Blue · ×5
3022 Plate 2 x 2
Sand Blue · ×4
3040b Slope 45° 2 x 1 with Bottom Pin
Black · ×4
32028 Plate Special 1 x 2 with Door Rail
Black · ×4
3623 Plate 1 x 3
Sand Blue · ×4
6141 Plate Round 1 x 1 with Solid Stud
Trans-Green · ×3
3020 Plate 2 x 4
Sand Blue · ×3
3022 Plate 2 x 2
Dark Blue · ×3
3023 Plate 1 x 2
Sand Blue · ×3
3040b Slope 45° 2 x 1 with Bottom Pin
Dark Gray · ×3
3045 Slope 45° 2 x 2 Double Convex
Dark Blue · ×3
3069b Tile 1 x 2 with Groove
Black · ×3
3455 Brick Arch 1 x 6
Black · ×3
3710 Plate 1 x 4
Sand Blue · ×3
3795 Plate 2 x 6
Sand Blue · ×3
3937 Hinge Brick 1 x 2 Base
Light Gray · ×3
2357 Brick 2 x 2 Corner
Black · ×2
2362b Panel 1 x 2 x 3 [Hollow Studs]
Black · ×2
More “Harry Potter” theme sets
Re:GO is an unofficial service and is not affiliated with the LEGO Group. LEGO® is a trademark of the LEGO Group. Data is based on Rebrickable and others.