How many pieces does the LEGO Flatiron Building (21023-1) have?

The LEGO Flatiron Building set (21023-1) contains 471 pieces. It was released in 2015 as part of the LEGO Architecture theme.

How can I find missing parts for LEGO set 21023-1?

On BrickMissing you can check which parts from the LEGO Flatiron Building (21023-1) you already own. Add your LEGO collection and we'll show exactly which of the 471 pieces you're missing and which you already have.

Can I build the LEGO Flatiron Building with parts I already have?

Use BrickMissing's free parts checker to find out. Add LEGO sets you own to your collection and we'll cross-reference all 471 parts to show your buildability percentage and which specific pieces you still need.

What theme is the LEGO Flatiron Building from?

The LEGO Flatiron Building (21023-1) belongs to the LEGO Architecture theme. You can browse all Architecture sets on BrickMissing to find more sets from this theme.

Flatiron Building

🏷️ 21023-1•🎨 Architecture•📅 2015•🧱 471 parts•Easy

Flatiron Building (21023-1) is a LEGO Architecture model that turns a well-known landmark into a compact display piece. The emphasis is on recognisable lines, spatial composition and architectural details that keep the monument readable at a smaller scale.

Parts Inventory

🧱 471 parts

Part	Color	Qty
Bracket 1 x 2 - 1 x 4 [Rounded Corners] 10201	Light Bluish Gray	12×
Brick Special 1 x 2 with 2 Studs on 1 Side 11211	Tan	4×
Slope Curved 2 x 1 No Studs [1/2 Bow] 11477	Tan	12×
Slope Curved 2 x 1 No Studs [1/2 Bow] 11477	Dark Tan	16×
Slope Curved 2 x 2 x 2/3 15068	Tan	20×
Brick 2 x 2 Corner 2357	Tan	8×
Tile Special 1 x 2 Grille with Bottom Groove 2412b	Tan	45×
Brick 1 x 2 3004	Tan	18×
Brick 1 x 2 3004	Light Bluish Gray	1×
Brick 1 x 1 3005	Tan	5×

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Brick 2 x 2 Corner	2357	Tan	8×
Tile Special 1 x 2 Grille with Bottom Groove	2412b	Tan	45×
Brick 1 x 2	3004	Tan	18×
Brick 1 x 2	3004	Light Bluish Gray	1×
Brick 1 x 1	3005	Tan	5×
Brick 1 x 1	3005	Light Bluish Gray	5×
Brick 1 x 6	3009	Tan	4×
Plate 1 x 2	3023	Tan	21×
Plate 1 x 2	3023	Trans-Brown	9×
Plate 1 x 2	3023	Dark Tan	10×
Plate 1 x 1	3024	Tan	3×
Plate 1 x 1	3024	Light Bluish Gray	2×
Plate 1 x 1	3024	Dark Tan	26×
Plate 4 x 8	3035	Light Bluish Gray	10×
Plate 6 x 8	3036	Light Bluish Gray	2×
Tile 2 x 2 with Groove	3068b	Dark Bluish Gray	4×
Tile 1 x 2 with Groove	3069b	Dark Tan	27×
Tile 1 x 2 with Groove	3069b	Trans-Brown	27×
Tile 1 x 2 with Groove	3069b	Tan	20×
Tile 1 x 1 with Groove	3070b	Dark Tan	12×
Tile 1 x 1 with Groove	3070b	Trans-Brown	18×
Tile 1 x 1 with Groove	3070b	Tan	21×
Tile 1 x 1 with Groove	3070b	Light Bluish Gray	1×
Plate 1 x 8	3460	Light Bluish Gray	3×
Brick 1 x 3	3622	Tan	6×
Plate 1 x 3	3623	Light Bluish Gray	4×
Plate 1 x 3	3623	Tan	10×
Plate 1 x 6	3666	Tan	3×
Plate 1 x 4	3710	Tan	4×
Plate 1 x 4	3710	Dark Tan	18×
Plate 1 x 4	3710	Light Bluish Gray	9×
Hinge Brick 1 x 4 [Upper]	3830	Light Bluish Gray	1×
Hinge Brick 1 x 4 [Lower]	3831	Light Bluish Gray	1×
Plate 2 x 10	3832	Black	4×
Brick Special 1 x 1 with Headlight	4070	Light Bluish Gray	2×
Tile 1 x 8 with Groove	4162	Black	3×
Tile 1 x 8 with 'Flatiron Building' Print	4162pr0037	Black	1×
Slope 30° 1 x 1 x 2/3 (Cheese Slope)	54200	Tan	9×
Slope 65° 2 x 1 x 2	60481	Light Bluish Gray	4×
Plate Round 1 x 1 with Solid Stud	6141	Tan	2×
Tile 1 x 3	63864	Dark Bluish Gray	2×
Tile 1 x 6 with Groove	6636	Black	2×
Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly]	73983	Light Bluish Gray	2×
Tile 2 x 4 with Groove	87079	Dark Bluish Gray	8×
Brick Special 1 x 1 with Stud on 1 Side	87087	Light Bluish Gray	7×
Plate Special 2 x 2 with Groove and Center Stud (Jumper)	87580	Light Bluish Gray	2×
Brick and Axle Separator v2.0	96874	Orange	1×

Build DNA

Parts inventory insights for Flatiron Building

471 pieces puts this build -40% against the average Architecture set and +40% against the average 2015 release.

LEGOARCHITECTURE

Vs average Architecture set

-40%-312 parts

This set471

Average set783

Average Architecture set: 783 pieces across 64 other sets.

Vs average 2015 set

+40%+135 parts

This set471

Average set336

Average 2015 set: 336 pieces across 418 other sets.

Color profile

7different colors

Dominant color

Tan

Tan215x

46%

Dark Tan109x

23%

Light Bluish Gray68x

14%

Trans-Brown54x

11%

Unique parts

12.7 pieces per unique type

Repeat factor

Average pieces per unique type.

13x

Most used part

Tile 1 x 2 with Groove

74x

Results are based on official LEGO part inventories. Accuracy improves as you confirm set completeness.

This site is not affiliated with or endorsed by the LEGO Group.

Build Insights🧩37unique parts🎨7different colors📊67.3avg. parts per color🏆74×Tile 1 x 2 with Groove

🎨 All Architecture sets 📅 All sets from 2015

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