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Flatiron Building

Flatiron Building

21023-1·LEGO·2015·52 parts

Used Avg
$64.94
New Avg
$77.72
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About Flatiron Building

Flatiron Building (21023-1) is a LEGO LEGO set from 2015 valued at $64.94 on BrickLink. It contains 52 cataloged parts. This set has been retired and is only available on the secondary market.

Parts (52)

Brick, Modified 1 x 2 with Studs on 1 Side
Brick, Modified 1 x 2 with Studs on 1 Side
×4
Slope, Curved 2 x 1 x 2/3
Slope, Curved 2 x 1 x 2/3
×12
Slope, Curved 2 x 1 x 2/3
Slope, Curved 2 x 1 x 2/3
×16
Slope, Curved 2 x 2 x 2/3
Slope, Curved 2 x 2 x 2/3
×20
Brick 2 x 2 Corner
Brick 2 x 2 Corner
×8
Tile, Modified 1 x 2 Grille with Bottom Groove
Tile, Modified 1 x 2 Grille with Bottom Groove
×45
Hinge Plate 1 x 4 Swivel (2429 / 2430)
Hinge Plate 1 x 4 Swivel (2429 / 2430)
×2
Bracket 1 x 2 - 1 x 4 with Rounded Corners
Bracket 1 x 2 - 1 x 4 with Rounded Corners
×12
Brick 1 x 2
Brick 1 x 2
×18
Brick 1 x 2
Brick 1 x 2
Brick 1 x 1
Brick 1 x 1
×5
Brick 1 x 1
Brick 1 x 1
×5
Brick 1 x 6
Brick 1 x 6
×4
Plate 1 x 2
Plate 1 x 2
×21
Plate 1 x 2
Plate 1 x 2
×9
Plate 1 x 2
Plate 1 x 2
×10
Plate 1 x 1
Plate 1 x 1
×4
Plate 1 x 1
Plate 1 x 1
×27
Plate 1 x 1
Plate 1 x 1
×3
Plate 4 x 8
Plate 4 x 8
×10
Plate 6 x 8
Plate 6 x 8
×2
Tile 2 x 2
Tile 2 x 2
×4
Tile 1 x 2
Tile 1 x 2
×20
Tile 1 x 2
Tile 1 x 2
×27
Tile 1 x 2
Tile 1 x 2
×27
Tile 1 x 1
Tile 1 x 1
×22
Tile 1 x 1
Tile 1 x 1
×19
Tile 1 x 1
Tile 1 x 1
×13
Tile 1 x 1
Tile 1 x 1
×2
Plate 1 x 8
Plate 1 x 8
×3
Brick 1 x 3
Brick 1 x 3
×6
Plate 1 x 3
Plate 1 x 3
×10
Plate 1 x 3
Plate 1 x 3
×4
Plate 1 x 6
Plate 1 x 6
×3
Plate 1 x 4
Plate 1 x 4
×4
Plate 1 x 4
Plate 1 x 4
×18
Plate 1 x 4
Plate 1 x 4
×9
Hinge Brick 1 x 4 Swivel Top
Hinge Brick 1 x 4 Swivel Top
Hinge Brick 1 x 4 Swivel Base
Hinge Brick 1 x 4 Swivel Base
Plate 2 x 10
Plate 2 x 10
×4
Brick, Modified 1 x 1 with Headlight
Brick, Modified 1 x 1 with Headlight
×2
Plate, Round 1 x 1
Plate, Round 1 x 1
×3
Tile 1 x 8
Tile 1 x 8
×3
Tile 1 x 8 with 'Flatiron Building' Pattern
Tile 1 x 8 with 'Flatiron Building' Pattern
Slope 30 1 x 1 x 2/3
Slope 30 1 x 1 x 2/3
×10
Slope 65 2 x 1 x 2
Slope 65 2 x 1 x 2
×4
Tile 1 x 3
Tile 1 x 3
×2
Tile 1 x 6
Tile 1 x 6
×2
Tile 2 x 4
Tile 2 x 4
×8
Brick, Modified 1 x 1 with Stud on Side
Brick, Modified 1 x 1 with Stud on Side
×7
Plate, Modified 2 x 2 with Groove and 1 Stud in Center (Jumper)
Plate, Modified 2 x 2 with Groove and 1 Stud in Center (Jumper)
×2
Brick and Axle Separator
Brick and Axle Separator

Common questions about Flatiron Building

How much is LEGO Flatiron Building (21023-1) worth?

Flatiron Building sells for an average of $64.94 used and $77.72 new/sealed on BrickLink based on 6 months of completed sales. As a retired set, prices tend to hold steady or appreciate over time, especially for complete sets with original packaging. Actual prices vary with completeness — missing minifigures or key parts will lower the value.

Is LEGO Flatiron Building (21023-1) retired?

Yes, Flatiron Building was released in 2015 and has been retired from retail for several years. Retired LEGO sets are only available on the secondary market through BrickLink, eBay, or other resale platforms.

How do I check if my Flatiron Building set is complete?

Use the parts list on this page to check every piece. For the minifigures specifically, you can use the brick'em scanner to identify each figure from a photo and confirm it matches what should be in this set. Missing pieces can be individually sourced on BrickLink.

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