How many pieces does the LEGO Building Systems (40505-1) have?

The LEGO Building Systems set (40505-1) contains 1211 pieces. It was released in 2024 as part of the LEGO LEGO Exclusive theme.

How can I find missing parts for LEGO set 40505-1?

On BrickMissing you can check which parts from the LEGO Building Systems (40505-1) you already own. Add your LEGO collection and we'll show exactly which of the 1211 pieces you're missing and which you already have.

Can I build the LEGO Building Systems 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 1211 parts to show your buildability percentage and which specific pieces you still need.

What theme is the LEGO Building Systems from?

The LEGO Building Systems (40505-1) belongs to the LEGO LEGO Exclusive theme. You can browse all LEGO Exclusive sets on BrickMissing to find more sets from this theme.

Building Systems

🏷️ 40505-1•🎨 LEGO Exclusive•📅 2024•🧱 1211 parts•Advanced

The LEGO Exclusive Building Systems 40505-1 set, comprising 1211 pieces, offers a detailed retrospective on LEGO's foundational construction methods. It features three distinct mini-scale models, each echoing a classic from the core building systems. Prominent among these is a representation of the 1955 Town Plan, a pivotal early LEGO System in Play product. The set also includes a mini-scale DUPLO Train, drawing inspiration from the 1980s sets 2700 and 2705. A highlight is the Technic mini-scale model, based on the flagship 853, which showcases a functioning steering system and visible moving pistons within its motor assembly. Behind a cleverly integrated wall, discover 19 nano-builds depicting milestone LEGO models, with space left for a personal favorite. This historical display piece measures approximately 38 cm in width, making it a significant addition to any collection of toy memorabilia.

Parts Inventory

🧱 1211 parts

Part	Color	Qty
Plate 3 x 3 11212	Dark Bluish Gray	16×
Sports Roller Skate 11253	Black	2×
Sports Roller Skate 11253	Black	3×
Sports Roller Skate 11253	Flat Silver	11×
Sports Roller Skate 11253	Red	3×
Tile 2 x 2 Corner 14719	Black	1×
Tile 2 x 2 Corner 14719	Dark Bluish Gray	1×
Slope 45° 2 x 1 Triple with Inside Stud Holder 15571	Black	1×
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) 15573	Black	3×
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) 15573	Dark Bluish Gray	13×

Showing 10 of 271 parts

🔓 Sign up to see all parts

Tile 2 x 2 Corner	14719	Black	1×
Tile 2 x 2 Corner	14719	Dark Bluish Gray	1×
Slope 45° 2 x 1 Triple with Inside Stud Holder	15571	Black	1×
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)	15573	Black	3×
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)	15573	Dark Bluish Gray	13×
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)	15573	Light Bluish Gray	14×
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)	15573	White	2×
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)	15573	Yellow	2×
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)	15573	Red	10×
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)	15573	Light Bluish Gray	4×
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)	15573	Black	5×
Tile Special 1 x 1 with Clip with Rounded Edges	15712	Black	1×
Tile Special 1 x 1 with Clip with Rounded Edges	15712	Yellow	2×
Tile Special 1 x 1 with Clip with Rounded Edges	15712	Red	3×
Tile Special 1 x 1 with Clip with Rounded Edges	15712	White	2×
Plate Round 1 x 2 Half Circle with Stud (Jumper)	1745	Light Bluish Gray	3×
Plate Round 1 x 2 Half Circle with Stud (Jumper)	1745	Black	1×
Weapon Harpoon [Smooth Shaft]	18041	Black	1×
Plate Special 1 x 2 with Pin Hole Underneath	18677	Red	2×
Brick Arch 1 x 12 x 3 Raised Arch with 5 Cross Supports	18838	Dark Bluish Gray	4×
Tile Round 1 x 1 with Hollow Bar	20482	Black	2×
Slope 45° 1 x 1 x 2/3 Quadruple Convex [Pyramid]	22388	Black	1×
Brick 2 x 2 Corner	2357	Dark Bluish Gray	9×
Panel 1 x 2 x 1 with Rounded Corners and 2 Sides	23969	White	3×
Plate 2 x 2 Corner	2420	Yellow	2×
Tile Round 1 x 1 Half Circle	24246	Black	1×
Tile Round 1 x 1 Half Circle	24246	Dark Red	1×
Tile Round 1 x 1 Half Circle	24246	Yellow	1×
Tile Round 1 x 1 Half Circle	24246	Red	2×
Wedge Plate 2 x 2 Left	24299	Light Bluish Gray	1×
Wedge Plate 2 x 2 Left	24299	Light Bluish Gray	1×
Wedge Plate 2 x 2 Right	24307	Light Bluish Gray	1×
Wedge Plate 2 x 2 Right	24307	Light Bluish Gray	1×
Tile 1 x 4 with Groove	2431	Red	2×
Tile 1 x 4 with Groove	2431	Black	2×
Tile 1 x 4 with Groove	2431	White	1×
Plate 2 x 12	2445	Dark Bluish Gray	4×
Brick 2 x 6	2456	Dark Bluish Gray	5×
Plant, Flower, Plate Round 1 x 1 with 5 Petals	24866	Dark Green	2×
Plant, Flower, Plate Round 1 x 1 with 5 Petals	24866	Light Bluish Gray	1×
Wedge Plate 2 x 2 Cut Corner	26601	Dark Tan	1×
Tile 2 x 3	26603	Light Bluish Gray	2×
Tile 2 x 3	26603	Red	4×
Slope Curved 2 x 1 with Stud Notch Right	29119	Dark Green	1×
Slope Curved 2 x 1 with Stud Notch Left	29120	Dark Green	1×
Brick 2 x 4	3001	Red	1×
Brick 2 x 4	3001	Dark Bluish Gray	7×
Brick 2 x 4	3001	Yellow	2×
Brick 2 x 2	3003	Dark Bluish Gray	5×
Brick 2 x 2	3003	Black	2×
Brick 2 x 2	3003	Yellow	1×
Brick 1 x 2	3004	Dark Bluish Gray	40×
Brick 1 x 2	3004	Red	1×
Brick 1 x 1	3005	White	4×
Brick 1 x 4	3010	Dark Bluish Gray	71×
Brick 1 x 4	3010	Red	1×
Brick Curved 2 x 2, Two Top Studs	30165	Black	1×
Plate 2 x 4	3020	Yellow	2×
Plate 2 x 4	3020	Black	1×
Plate 2 x 4	3020	Red	4×
Plate 2 x 3	3021	Light Bluish Gray	1×
Plate 2 x 3	3021	Black	1×
Plate 2 x 3	3021	White	5×
Plate 2 x 3	3021	Red	3×
Plate 2 x 2	3022	Yellow	2×
Plate 2 x 2	3022	Dark Bluish Gray	11×
Plate 2 x 2	3022	White	4×
Plate 2 x 2	3022	Pearl Gold	8×
Plate 2 x 2	3022	Black	1×
Plate 2 x 2	3022	Light Bluish Gray	1×
Plate 1 x 2	3023	Light Bluish Gray	7×
Plate 1 x 2	3023	Yellow	5×
Plate 1 x 2	3023	Trans-Clear	5×
Plate 1 x 2	3023	Dark Bluish Gray	12×
Plate 1 x 2	3023	Red	6×
Plate 1 x 2	3023	Light Bluish Gray	1×
Plate 1 x 2	3023	Reddish Brown	1×
Plate 1 x 2	3023	White	2×
Plate 1 x 1	3024	Sand Green	1×
Plate 1 x 1	3024	Dark Green	2×
Plate 1 x 1	3024	Medium Blue	1×
Plate 1 x 1	3024	Dark Bluish Gray	4×
Plate 1 x 1	3024	Light Bluish Gray	2×
Plate 1 x 1	3024	Trans-Clear	12×
Plate 1 x 1	3024	Lavender	4×
Plate 1 x 1	3024	White	28×
Plate 1 x 1	3024	Red	6×
Plate 1 x 1	3024	Yellow	9×
Plate 1 x 1	3024	Light Bluish Gray	1×
Plate 1 x 1	3024	Black	9×
Plate 1 x 1	3024	Black	11×
Plate 4 x 12	3029	Black	16×
Plate 6 x 10	3033	Yellow	3×
Plate 6 x 10	3033	Black	2×
Plate 2 x 8	3034	Black	1×
Plate Round Corner 3 x 3	30357	Red	1×
Plate Round Corner 3 x 3	30357	White	1×
Plate 6 x 8	3036	Light Bluish Gray	3×
Bar 4L (Lightsaber Blade / Wand)	30374	Reddish Brown	1×
Slope 45° 2 x 1 Double with Inside Stud Holder	3044c	Red	1×
Brick Round 1 x 1 Open Stud	3062b	Black	2×
Brick Round 1 x 1 Open Stud	3062b	Yellow	1×
Brick Round 1 x 1 Open Stud	3062b	Light Bluish Gray	1×
Tile 2 x 2 with Groove	3068b	Light Bluish Gray	6×
Tile 2 x 2 with Groove	3068b	Red	1×
Tile 2 x 2 with Groove	3068b	Dark Bluish Gray	11×
Tile 2 x 2 with Groove	3068b	Black	44×
Tile 2 x 2 with Groove	3068b	Yellow	30×
Tile 2 x 2 with Groove	3068b	Black	26×
Tile 1 x 2 with Groove	3069b	Dark Bluish Gray	17×
Tile 1 x 2 with Groove	3069b	Pearl Gold	8×
Tile 1 x 2 with Groove	3069b	Black	50×
Tile 1 x 2 with Groove	3069b	Yellow	2×
Tile 1 x 1 with Groove	3070b	Light Bluish Gray	2×
Tile 1 x 1 with Groove	3070b	Red	2×
Tile 1 x 1 with Groove	3070b	Yellow	1×
Tile 1 x 1 with Groove	3070b	Black	2×
Tile 1 x 1 with Groove	3070b	Dark Blue	1×
Tile 1 x 1 with Groove	3070b	Black	2×
Tile 1 x 1 with White Lines/Stripes print	3070bpr0213	Light Bluish Gray	19×
Plate Special 3 x 2 with Rounded End, Hole	3176	Black	5×
Technic Brick 1 x 2 [2 Pin Holes]	32000	Dark Bluish Gray	2×
Technic Brick 1 x 2 [2 Pin Holes]	32000	Light Bluish Gray	1×
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced	32123b	White	4×
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced	32123b	Light Bluish Gray	1×
Technic Pin Connector Plate 1 x 2 x 1 2/3 [Two Holes On Top]	32530	Yellow	2×
Plate Round 1 x 1 with Hollow Stud and Horizontal Bar 1L	32828	Dark Green	5×
Plate Round 1 x 1 with Hollow Stud and Horizontal Bar 1L	32828	Black	1×
Plate Special 2 x 2 with Only 2 studs	33909	Black	4×
Plate Special 2 x 2 with Only 2 studs	33909	Red	4×
Plate Special 2 x 2 with Only 2 studs	33909	Yellow	4×
Plate Special 1 x 3 with 2 Studs with Groove and Inside Stud Holder (Jumper)	34103	Black	8×
Plate Special 1 x 3 with 2 Studs with Groove and Inside Stud Holder (Jumper)	34103	Yellow	7×
Plate Special 1 x 3 with 2 Studs with Groove and Inside Stud Holder (Jumper)	34103	Dark Bluish Gray	3×
Plate Special 1 x 3 with 2 Studs with Groove and Inside Stud Holder (Jumper)	34103	Red	4×
Plate Special 1 x 3 with 2 Studs with Groove and Inside Stud Holder (Jumper)	34103	Light Bluish Gray	5×
Plate Special 1 x 3 with 2 Studs with Groove and Inside Stud Holder (Jumper)	34103	White	2×
Plate 1 x 8	3460	Black	4×
Plate 1 x 8	3460	Yellow	6×
Plate 1 x 8	3460	Red	4×
Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip]	3484	Black	1×
Slope Double 45° 1 x 1	35464	Black	2×
Slope Double 45° 1 x 1	35464	Red	1×
Plate Special 1 x 2 Rounded with 2 Open Studs	35480	Black	3×
Plate Special 1 x 2 Rounded with 2 Open Studs	35480	White	1×
Tile 45° Cut 2 x 2 (Triangle)	35787	Light Bluish Gray	2×
Tile 45° Cut 2 x 2 (Triangle)	35787	Light Bluish Gray	2×
Brick 1 x 3	3622	Dark Bluish Gray	7×
Plate 1 x 3	3623	Black	2×
Plate 1 x 3	3623	Yellow	2×
Plate 1 x 3	3623	Red	1×
Slope Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]	3660	Dark Bluish Gray	1×
Slope Inverted 45° 2 x 1	3665	Dark Bluish Gray	8×
Technic Pin without Friction Ridges Lengthwise	3673	Yellow	14×
Bracket 1 x 1 - 1 x 1 Inverted	36840	Black	2×
Bracket 1 x 1 - 1 x 1 Inverted	36840	Black	3×
Bracket 1 x 1 - 1 x 1 Inverted	36840	Yellow	5×
Bracket 1 x 1 - 1 x 1 Inverted	36840	Dark Bluish Gray	1×
Technic Brick 1 x 2 [1 Pin Hole]	3700	Black	3×
Technic Brick 1 x 4 [3 Pin Holes]	3701	Black	1×
Plate 1 x 4	3710	Black	4×
Plate 1 x 4	3710	Black	4×
Plate 1 x 4	3710	White	1×
Plate 1 x 4	3710	Dark Bluish Gray	2×
Plate 1 x 4	3710	Red	6×
Brick Curved 1 x 2 x 1 No Studs	37352	White	2×
Plate 2 x 6	3795	Red	2×
Plate 2 x 6	3795	Black	1×
Plate 2 x 10	3832	Black	2×
Technic Brick 1 x 6 [5 Pin Holes]	3894	Black	1×
Plate 6 x 6	3958	Light Bluish Gray	3×
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)	4032a	Light Bluish Gray	1×
Brick Special 1 x 1 with Headlight	4070	Red	14×
Brick Special 1 x 1 with Headlight	4070	Dark Red	1×
Brick Special 1 x 1 with Headlight	4070	Yellow	2×
Brick Special 1 x 1 with Headlight	4070	White	6×
Brick Special 1 x 1 with Headlight	4070	Black	1×
Tile 1 x 8 with Groove	4162	Dark Bluish Gray	1×
Tile 1 x 8 with Groove	4162	Red	6×
Tile 1 x 8 with 'LEGO House' print	4162pr0092	Black	1×
Tile 1 x 8 with 'LEGO Building Systems' print	4162pr0108	Black	1×
Plate Special 1 x 4 with 2 Studs with Groove [New Underside]	41740	Light Bluish Gray	3×
Brick Special 1 x 2 with Groove	4216	White	9×
Wheel 11 x 8 with Center Groove	42610	Red	14×
Technic Pin 1/2	4274	Light Bluish Gray	2×
Plate 2 x 16	4282	Red	4×
Slope 33° 3 x 1	4286	Red	1×
Plate Special 1 x 2 [Open O Top Clip]	44861	Black	10×
Plate Special 1 x 2 [Open O Top Clip]	44861	White	1×
Plate Special 1 x 2 [Open O Top Clip]	44861	Yellow	1×
Plate Special 1 x 2 [Open O Top Clip]	44861	Red	1×
Brick Special 1 x 2 with Pin - Bottom Stud Holder	44865	Red	2×
Technic Axle 3	4519	Light Bluish Gray	4×
Brick Special 1 x 2 x 2/3 with Studs on Sides	4595	Black	1×
Pneumatic T-Piece (T Bar) [New Style]	4697b	Light Bluish Gray	1×
Brick Special 1 x 1 Studs on 4 Sides	4733	Reddish Brown	1×
Dish 2 x 2 Inverted [Radar]	4740	Light Bluish Gray	1×
Brick Curved 1 x 1 x 2/3 Double Curved Top, No Studs	49307	Red	2×
Plate Special 1 x 1 with Tooth	49668	Bright Light Orange	1×
Plate Special 1 x 1 with Tooth	49668	Light Bluish Gray	1×
Slope 30° 1 x 1 x 2/3 (Cheese Slope)	54200	Yellow	2×
Slope 30° 1 x 1 x 2/3 (Cheese Slope)	54200	Dark Bluish Gray	8×
Slope 30° 1 x 1 x 2/3 (Cheese Slope)	54200	White	5×
Slope 30° 1 x 1 x 2/3 (Cheese Slope)	54200	Trans-Yellow	1×
Slope 30° 1 x 1 x 2/3 (Cheese Slope)	54200	Black	1×
Slope 30° 1 x 1 x 2/3 (Cheese Slope)	54200	Dark Blue	2×
Slope 30° 1 x 1 x 2/3 (Cheese Slope)	54200	Dark Red	1×
Propeller with Pin	54568	Yellow	1×
Technic Axle Connector Hub with 3 Axles at 120°	57585	Reddish Brown	1×
Cone 1 x 1 [Top Groove]	59900	Dark Green	3×
Window 1 x 2 x 2 Plane, Hollow Studs, Single Hole Top and Bottom for Glass	60032	Red	6×
Plate Special 1 x 2 with Handle on End [Closed Ends]	60478	Medium Nougat	1×
Plate Special 1 x 2 with Handle on End [Closed Ends]	60478	Yellow	1×
Plate 1 x 12	60479	Black	6×
Plate 1 x 12	60479	Red	4×
Plate 1 x 12	60479	Dark Bluish Gray	12×
Equipment Hose Nozzle / Gun with Side String Hole Simplified	60849	Light Bluish Gray	1×
Plate Round 1 x 1 with Solid Stud	6141	Yellow	3×
Plate Round 1 x 1 with Solid Stud	6141	Medium Nougat	1×
Panel 1 x 1 x 1 Corner	6231	Yellow	2×
Panel 1 x 1 x 1 Corner	6231	White	4×
Panel 1 x 1 x 1 Corner	6231	Red	4×
Tile 1 x 3	63864	Light Bluish Gray	15×
Tile 1 x 3	63864	Light Bluish Gray	2×
Technic Brick 1 x 1 with Pin Hole	6541	Yellow	5×
Technic Brick 1 x 1 with Pin Hole	6541	Black	12×
Technic Brick 1 x 1 with Pin Hole	6541	Dark Bluish Gray	5×
Plate Special 2 x 4 with Groove and Two Center Studs (Jumper)	65509	Red	1×
Bar, Angled with 1 x 1 Round Plate / Stud on End	65578	Light Bluish Gray	1×
Tile 1 x 6 with Groove	6636	Yellow	6×
Tile 1 x 6 with Groove	6636	Black	4×
Tile 1 x 6 with Groove	6636	Light Bluish Gray	6×
Plate Special 1 x 2 with Wheel Holder, Reinforced Underside	66897	Light Bluish Gray	4×
Tile 2 x 6	69729	Red	4×
Technic Brick 1 x 1 with Axle Hole	73230	Medium Nougat	3×
Technic Brick 1 x 1 with Axle Hole	73230	Dark Bluish Gray	12×
Bracket 1 x 1 - 1 x 2 Inverted	73825	Yellow	1×
Hose Rigid 3mm D. 18L / 14.4cm	75c18	Black	2×
Bar 2L with Stop in Center	78258	Red	2×
Plate 1 x 5	78329	White	1×
Plate 1 x 5	78329	Red	1×
Plate 1 x 5	78329	Light Bluish Gray	4×
Bracket 1 x 1 - 1 x 2	79389	White	4×
Brick Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside [New Style]	85080	Light Bluish Gray	1×
Plate Round 1 x 1 with Open Stud	85861	Light Bluish Gray	1×
Tile 2 x 4 with Groove	87079	Black	2×
Tile 2 x 4 with Groove	87079	Yellow	2×
Plate Special 2 x 2 with Groove and Center Stud (Jumper)	87580	Yellow	3×
Plate Special 2 x 2 with Groove and Center Stud (Jumper)	87580	Black	1×
Plate Special 2 x 2 with Groove and Center Stud (Jumper)	87580	Red	4×
Plate Special 2 x 2 with Groove and Center Stud (Jumper)	87580	White	2×
Plate Special 2 x 2 with Groove and Center Stud (Jumper)	87580	Light Bluish Gray	2×
Plate Special 2 x 2 with Groove and Center Stud (Jumper)	87580	Dark Bluish Gray	13×
Bar 3L	87994	Black	1×
Minifig Trophy Statuette	90398	Dark Red	1×
Plate 16 x 16	91405	Black	1×
Plate 2 x 14	91988	Light Bluish Gray	1×
Tyre 17.5 x 6 with Shallow Staggered Treads and Middle Band	92409	Black	4×
Plate 8 x 16	92438	Black	1×
Wheel 11 x 6 with 8 Spokes	93593	Light Bluish Gray	4×
Brick and Axle Separator v2.0	96874	Orange	1×
Tile Round 1 x 1	98138	Yellow	3×
Tile Round 1 x 1	98138	Red	4×
Tile Round 1 x 1	98138	Dark Blue	3×
Tile Special 1 x 2 with Sloped Walls AKA Money / Gold Bar [Ingot]	99563	Light Bluish Gray	2×
Bracket 1 x 2 - 1 x 2	99781	Black	1×

Build DNA

Parts inventory insights for Building Systems

1,211 pieces puts this build +85% against the average LEGO Exclusive set and +112% against the average 2024 release.

LEGOLEGO EXCLUSIVE

Vs average LEGO Exclusive set

+85%+555 parts

This set1,211

Average set656

Average LEGO Exclusive set: 656 pieces across 59 other sets.

Vs average 2024 set

+112%+639 parts

This set1,211

Average set572

Average 2024 set: 572 pieces across 561 other sets.

Color profile

23different colors

Dominant color

Dark Bluish Gray

Dark Bluish Gray305x

25%

Black296x

24%

Red149x

12%

Light Bluish Gray143x

12%

Unique parts

9.1 pieces per unique type

133

Repeat factor

Average pieces per unique type.

Most used part

Tile 2 x 2 with Groove

118x

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🧩133unique parts🎨23different colors📊52.7avg. parts per color🏆118×Tile 2 x 2 with Groove

🎨 All LEGO Exclusive sets 📅 All sets from 2024

← Back to Buildable Sets