Flatiron Building (21023-1) is a Architecture LEGO set released in 2015 with 471 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing Architecture sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 52 unique part types.
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Building instructions
Official LEGO instructions — read on BrickID
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Parts in this set
52 parts · page 1 of 2 · updating…
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![Bracket 1 x 2 - 1 x 4 [Rounded Corners]](https://cdn.rebrickable.com/media/parts/elements/6014615.jpg)
Bracket 1 x 2 - 1 x 4 [Rounded Corners]10201 · ×12 · Light Bluish Gray -
Brick 1 x 13005 · ×5 · Light Bluish Gray -
Brick 1 x 13005 · ×5 · Tan -
Brick 1 x 23004 · ×18 · Tan -
Brick 1 x 23004 · ×1 · Light Bluish Gray -
Brick 1 x 33622 · ×6 · Tan -
Brick 1 x 63009 · ×4 · Tan -
Brick 2 x 2 Corner2357 · ×8 · Tan -
Brick and Axle Separator v2.096874 · ×1 · Orange -
Brick Special 1 x 1 with Headlight4070 · ×2 · Light Bluish Gray -
Brick Special 1 x 1 with Stud on 1 Side87087 · ×7 · Light Bluish Gray -
Brick Special 1 x 2 with 2 Studs on 1 Side11211 · ×4 · Tan -
![Hinge Brick 1 x 4 [Lower]](https://cdn.rebrickable.com/media/parts/elements/4211461.jpg)
Hinge Brick 1 x 4 [Lower]3831 · ×1 · Light Bluish Gray -
![Hinge Brick 1 x 4 [Upper]](https://cdn.rebrickable.com/media/parts/elements/4211460.jpg)
Hinge Brick 1 x 4 [Upper]3830 · ×1 · Light Bluish Gray -
![Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly]](https://cdn.rebrickable.com/media/parts/elements/4219256.jpg)
Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly]73983 · ×2 · Light Bluish Gray -
Plate 1 x 13024 · ×3 · Tan -
Plate 1 x 13024 · ×26 · Dark Tan -
Plate 1 x 13024 · ×2 · Light Bluish Gray -
Plate 1 x 23023 · ×10 · Dark Tan -
Plate 1 x 23023 · ×9 · Trans-Brown -
Plate 1 x 23023 · ×21 · Tan -
Plate 1 x 33623 · ×4 · Light Bluish Gray -
Plate 1 x 33623 · ×10 · Tan -
Plate 1 x 43710 · ×18 · Dark Tan -
Plate 1 x 43710 · ×9 · Light Bluish Gray -
Plate 1 x 43710 · ×4 · Tan -
Plate 1 x 63666 · ×3 · Tan -
Plate 1 x 83460 · ×3 · Light Bluish Gray -
Plate 2 x 103832 · ×4 · Black -
Plate 4 x 83035 · ×10 · Light Bluish Gray -
Plate 6 x 83036 · ×2 · Light Bluish Gray -
Plate Round 1 x 1 with Solid Stud6141 · ×2 · Tan -
Plate Special 2 x 2 with Groove and Center Stud (Jumper)87580 · ×2 · Light Bluish Gray -
Slope 30° 1 x 1 x 2/3 (Cheese Slope)54200 · ×9 · Tan -
Slope 65° 2 x 1 x 260481 · ×4 · Light Bluish Gray -
![Slope Curved 2 x 1 No Studs [1/2 Bow]](https://cdn.rebrickable.com/media/parts/elements/6046922.jpg)
Slope Curved 2 x 1 No Studs [1/2 Bow]11477 · ×12 · Tan -
![Slope Curved 2 x 1 No Studs [1/2 Bow]](https://cdn.rebrickable.com/media/parts/elements/6101254.jpg)
Slope Curved 2 x 1 No Studs [1/2 Bow]11477 · ×16 · Dark Tan -
Slope Curved 2 x 2 x 2/315068 · ×20 · Tan -
Tile 1 x 1 with Groove3070b · ×18 · Trans-Brown -
Tile 1 x 1 with Groove3070b · ×21 · Tan -
Tile 1 x 1 with Groove3070b · ×1 · Light Bluish Gray -
Tile 1 x 1 with Groove3070b · ×12 · Dark Tan -
Tile 1 x 2 with Groove3069b · ×27 · Trans-Brown -
Tile 1 x 2 with Groove3069b · ×20 · Tan -
Tile 1 x 2 with Groove3069b · ×27 · Dark Tan -
Tile 1 x 363864 · ×2 · Dark Bluish Gray -
Tile 1 x 6 with Groove6636 · ×2 · Black -
Tile 1 x 8 with 'Flatiron Building' Print4162pr0037 · ×1 · Black