How many pieces are in the Building Systems?

Building Systems contains 1,211 pieces.

What age is the Building Systems recommended for?

This set is recommended for ages 10+.

When was the Building Systems released?

Building Systems was released in 2024.

⚠ RETIRING SOON

1 / 3

🏛 LEGO Exclusive

Set #40505

Building Systems

Building Systems is a delightful celebration of LEGO's history and design philosophy.

Before you buy

Who it's for: Ages 10+ · Intermediate build LEGO enthusiasts, AFOLs, anyone interested in LEGO history and building techniques
Build: 1,211 pieces · about 4.5 hours Build time is an estimate.
Price: $99.99 list price · 8.3¢ per piece
Availability: Likely retiring soon

★★★☆☆ 3.9 community rating from 15 ratings

Fans appreciate the nostalgic design and clever building techniques, praising it as a unique tribute to LEGO's history. Some find the color palette a bit muted, but overall it's considered a worthwhile addition for dedicated LEGO enthusiasts.

$99.99

Best Price

$105.51

📝 Our Take

AI-assisted editorial summary, grounded in our LEGO database and public community discussions. How we use AI

Building Systems is a delightful celebration of LEGO's history and design philosophy. This set cleverly recreates classic LEGO elements and building techniques in a modern, display-worthy model, making it a nostalgic trip for long-time fans and an educational experience for newer builders.

This set is perfect for LEGO enthusiasts of all ages who appreciate the artistry and heritage of the brick. The build offers a satisfying mix of simple and intricate steps, resulting in a visually appealing model that sparks conversation and invites exploration of LEGO's evolution.

Skip this if you're seeking a set with direct play features or a complex, licensed theme. While Building Systems offers a unique building experience and display value, those looking for action-packed play or specific character-based models might prefer sets like the LEGO Ideas Globe or a Star Wars diorama.

✨ New

Ask BlockTalk about this set

AI assistant with full set data

BlockTalk

Hi! I'm BlockTalk, your LEGO expert. Ask me anything about the Building Systems - building tips, investment potential, comparisons, or anything else!

Try asking:

What are the key building techniques used in the Building Systems set? How does this set compare to other LEGO Exclusive sets in terms of collectibility? What are some creative ways to display the Building Systems model? How does this set pay homage to LEGO's history and design principles?

🧱 Building Experience

AI-assisted build estimate, grounded in our LEGO database and public community discussions. How we use AI

🧩

1,211

Pieces

⏱

4.5h

Estimated Build Time

📊

Intermediate

Difficulty

👤

10+

Ages

Build Highlights:

Creative use of SNOT (Studs Not On Top) techniques to achieve smooth surfaces and intricate details.
Incorporation of classic LEGO elements and color schemes from different eras.
Recreation of iconic LEGO building techniques and design features.
Display-worthy model that showcases LEGO's evolution and versatility.

📈 Investment Analysis

AI-assisted investment analysis, grounded in our LEGO database and public community discussions. How we use AI

↑ Trending up since release

Investment Grade

⏳ Likely retiring soon

The LEGO Building Systems set presents a moderate investment opportunity. As a LEGO Exclusive, it benefits from limited availability and potential for increased demand upon retirement. The set's unique concept, celebrating LEGO's history, could appeal to collectors and nostalgic fans. However, its investment potential may be limited by its relatively small piece count and lack of direct connection to a major licensed theme. Monitoring its performance on the secondary market after retirement will be crucial to assess its long-term investment viability.

Not Financial Advice: Content is for educational purposes only. Past performance doesn't guarantee future results. Full disclaimer

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Compared to other LEGO Exclusive sets, Building Systems offers a unique blend of nostalgia and modern building techniques. While sets like the modular buildings offer more intricate construction and display value, Building Systems provides a more accessible entry point into the world of LEGO collecting. Its focus on LEGO's heritage sets it apart from licensed theme sets, appealing to a different type of LEGO enthusiast.

📦 Parts Inventory

Official piece count: 1,211
Parts cataloged in this inventory: 133 unique parts, 1,211 pieces

Missing a piece? Check this set piece by piece, with look-alike colors flagged and element IDs for replacements.

Plate 3 x 3

Part #: 11212 16× Dark Bluish Gray

Sports Roller Skate

Part #: 11253 11× Flat Silver

Sports Roller Skate

Part #: 11253 3× Black

Sports Roller Skate

Part #: 11253 2× Blue

Sports Roller Skate

Part #: 11253 3× Red

Tile 2 x 2 Corner

Part #: 14719 1× Dark Bluish Gray

Tile 2 x 2 Corner

Part #: 14719 1× Blue

Brick Sloped 45° ...

Part #: 15571 1× Blue

Plate Special 1 x...

Part #: 15573 2× Yellow

Plate Special 1 x...

Part #: 15573 14× Light Bluish Gray

Plate Special 1 x...

Part #: 15573 10× Red

Plate Special 1 x...

Part #: 15573 5× Blue

Plate Special 1 x...

Part #: 15573 13× Dark Bluish Gray

Plate Special 1 x...

Part #: 15573 2× White

Plate Special 1 x...

Part #: 15573 3× Black

Plate Special 1 x...

Part #: 15573 4× Green

Tile Special 1 x ...

Part #: 15712 1× Black

Tile Special 1 x ...

Part #: 15712 2× White

Tile Special 1 x ...

Part #: 15712 3× Red

Tile Special 1 x ...

Part #: 15712 2× Yellow

Plate Special Rou...

Part #: 1745 3× Light Bluish Gray

Plate Special Rou...

Part #: 1745 1× Black

Weapon Harpoon [S...

Part #: 18041 1× Black

Plate Special 1 x...

Part #: 18677 2× Red

Brick Arch 1 x 12...

Part #: 18838 4× Dark Bluish Gray

Tile Special Roun...

Part #: 20482 2× Black

Brick Sloped 45° ...

Part #: 22388 1× Black

Brick 2 x 2 Corner

Part #: 2357 9× Dark Bluish Gray

Panel 1 x 2 x 1 w...

Part #: 23969 3× White

Plate 2 x 2 Corner

Part #: 2420 2× Yellow

Tile Round 1 x 1 ...

Part #: 24246 1× Yellow

Tile Round 1 x 1 ...

Part #: 24246 2× Red

Tile Round 1 x 1 ...

Part #: 24246 1× Blue

Tile Round 1 x 1 ...

Part #: 24246 1× Dark Red

Wedge Plate 2 x 2...

Part #: 24299 1× Green

Wedge Plate 2 x 2...

Part #: 24299 1× Light Bluish Gray

Wedge Plate 2 x 2...

Part #: 24307 1× Light Bluish Gray

Wedge Plate 2 x 2...

Part #: 24307 1× Green

Tile 1 x 4 with G...

Part #: 2431 1× White

Part #: 2445 4× Dark Bluish Gray

Brick 2 x 6

Part #: 2456 5× Dark Bluish Gray

Plant, Flower, Pl...

Part #: 24866 2× Dark Green

Plant, Flower, Pl...

Part #: 24866 1× Light Bluish Gray

Wedge Plate 2 x 2...

Part #: 26601 1× Dark Tan

Tile 2 x 3

Part #: 26603 4× Red

Tile 2 x 3

Part #: 26603 2× Green

Brick Wedged, Cur...

Part #: 29119 1× Dark Green

Brick Wedged, Cur...

Part #: 29120 1× Dark Green

Brick 2 x 4

Part #: 3001 7× Dark Bluish Gray

Brick 2 x 4

Part #: 3001 1× Red

Brick 2 x 4

Part #: 3001 2× Yellow

Brick 2 x 2

Part #: 3003 1× Yellow

Brick 2 x 2

Part #: 3003 5× Dark Bluish Gray

Part #: 3004 40× Dark Bluish Gray

Brick 1 x 1

Part #: 3005 4× White

Brick 1 x 4

Part #: 3010 1× Red

Brick 1 x 4

Part #: 3010 71× Dark Bluish Gray

Brick Curved 2 x ...

Part #: 30165 1× Blue

Part #: 3020 2× Yellow

Plate 2 x 3

Part #: 3021 3× Red

Plate 2 x 3

Part #: 3021 5× White

Plate 2 x 3

Part #: 3021 1× Green

Plate 2 x 3

Part #: 3021 1× Blue

Plate 2 x 2

Part #: 3022 2× Yellow

Plate 2 x 2

Part #: 3022 11× Dark Bluish Gray

Plate 2 x 2

Part #: 3022 8× Pearl Gold

Plate 2 x 2

Part #: 3022 1× Blue

Plate 2 x 2

Part #: 3022 4× White

Plate 2 x 2

Part #: 3022 1× Green

Plate 1 x 2

Part #: 3023 5× Trans-Clear

Plate 1 x 2

Part #: 3023 1× Light Bluish Gray

Plate 1 x 2

Part #: 3023 6× Red

Plate 1 x 2

Part #: 3023 1× Reddish Brown

Plate 1 x 2

Part #: 3023 12× Dark Bluish Gray

Plate 1 x 2

Part #: 3023 7× Green

Plate 1 x 2

Part #: 3023 5× Yellow

Plate 1 x 2

Part #: 3023 2× White

Plate 1 x 1

Part #: 3024 6× Red

Plate 1 x 1

Part #: 3024 12× Trans-Clear

Plate 1 x 1

Part #: 3024 4× Dark Bluish Gray

Plate 1 x 1

Part #: 3024 9× Yellow

Plate 1 x 1

Part #: 3024 1× Green

Plate 1 x 1

Part #: 3024 4× Lavender

Plate 1 x 1

Part #: 3024 1× Sand Green

Plate 1 x 1

Part #: 3024 28× White

Plate 1 x 1

Part #: 3024 2× Dark Green

Plate 1 x 1

Part #: 3024 1× Medium Blue

Plate 1 x 1

Part #: 3024 9× Blue

Plate 1 x 1

Part #: 3024 11× Black

Plate 1 x 1

Part #: 3024 2× Light Bluish Gray

Plate 4 x 12

Part #: 3029 16× Black

Plate 6 x 10

Part #: 3033 2× Blue

Plate 6 x 10

Part #: 3033 3× Yellow

Plate 2 x 8

Part #: 3034 1× Black

Plate Round Corne...

Part #: 30357 1× Red

Plate Round Corne...

Part #: 30357 1× White

Plate 6 x 8

Part #: 3036 3× Light Bluish Gray

Bar 4L (Lightsabe...

Part #: 30374 1× Reddish Brown

Brick Sloped 45° ...

Part #: 3044c 1× Red

Brick Round 1 x 1...

Part #: 3062b 2× Blue

Brick Round 1 x 1...

Part #: 3062b 1× Light Bluish Gray

Brick Round 1 x 1...

Part #: 3062b 1× Yellow

Tile 2 x 2 with G...

Part #: 3068b 26× Blue

Tile 2 x 2 with G...

Part #: 3068b 1× Red

Tile 2 x 2 with G...

Part #: 3068b 6× Green

Tile 2 x 2 with G...

Part #: 3068b 44× Black

Tile 2 x 2 with G...

Part #: 3068b 30× Yellow

Tile 2 x 2 with G...

Part #: 3068b 11× Dark Bluish Gray

Tile 1 x 2 with G...

Part #: 3069b 8× Pearl Gold

Tile 1 x 2 with G...

Part #: 3069b 50× Black

Tile 1 x 2 with G...

Part #: 3069b 2× Yellow

Tile 1 x 2 with G...

Part #: 3069b 17× Dark Bluish Gray

Tile 1 x 1 with G...

Part #: 3070b 2× Blue

Tile 1 x 1 with G...

Part #: 3070b 2× Red

Tile 1 x 1 with G...

Part #: 3070b 1× Dark Blue

Tile 1 x 1 with G...

Part #: 3070b 1× Yellow

Tile 1 x 1 with G...

Part #: 3070b 2× Green

Tile 1 x 1 with G...

Part #: 3070b 2× Black

Tile 1 x 1 with W...

Part #: 3070bpr0213 19× Light Bluish Gray

Plate Special 3 x...

Part #: 3176 5× Blue

Technic Brick 1 x...

Part #: 32000 2× Dark Bluish Gray

Technic Brick 1 x...

Part #: 32000 1× Light Bluish Gray

Technic Bush 1/2 ...

Part #: 32123b 1× Light Bluish Gray

Technic Bush 1/2 ...

Part #: 32123b 4× White

Technic Pin Conne...

Part #: 32530 2× Yellow

Plate Special Rou...

Part #: 32828 1× Black

Plate Special Rou...

Part #: 32828 5× Dark Green

Plate Special 2 x...

Part #: 33909 4× Blue

Plate Special 2 x...

Part #: 33909 4× Red

Plate Special 2 x...

Part #: 33909 4× Yellow

Plate Special 1 x...

Part #: 34103 4× Red

Plate Special 1 x...

Part #: 34103 8× Blue

Plate Special 1 x...

Part #: 34103 7× Yellow

Plate Special 1 x...

Part #: 34103 3× Dark Bluish Gray

Plate Special 1 x...

Part #: 34103 2× White

Plate Special 1 x...

Part #: 34103 5× Green

Plate 1 x 8

Part #: 3460 6× Yellow

Part #: 35464 2× Black

Brick Sloped Doub...

Part #: 35464 1× Red

Plate Special 1 x...

Part #: 35480 3× Black

Plate Special 1 x...

Part #: 35480 1× White

Tile 45° Cut 2 x ...

Part #: 35787 2× Light Bluish Gray

Tile 45° Cut 2 x ...

Part #: 35787 2× Green

Brick 1 x 3

Part #: 3622 7× Dark Bluish Gray

Plate 1 x 3

Part #: 3623 2× Yellow

Part #: 3660 1× Dark Bluish Gray

Brick Sloped Inve...

Part #: 3665 8× Dark Bluish Gray

Technic Pin witho...

Part #: 3673 14× Yellow

Bracket 1 x 1 - 1...

Part #: 36840 1× Dark Bluish Gray

Bracket 1 x 1 - 1...

Part #: 36840 5× Yellow

Bracket 1 x 1 - 1...

Part #: 36840 3× Blue

Bracket 1 x 1 - 1...

Part #: 36840 2× Black

Part #: 3710 4× Black

Plate 1 x 4

Part #: 3710 1× White

Plate 1 x 4

Part #: 3710 2× Dark Bluish Gray

Part #: 37352 2× White

Plate 2 x 6

Part #: 3795 1× Black

Part #: 3958 3× Light Bluish Gray

Plate Round 2 x 2...

Part #: 4032a 1× Green

Brick Special 1 x...

Part #: 4070 2× Yellow

Brick Special 1 x...

Part #: 4070 6× White

Brick Special 1 x...

Part #: 4070 1× Dark Red

Part #: 4162 1× Dark Bluish Gray

Tile 1 x 8 with G...

Part #: 4162 6× Red

Tile 1 x 8 with '...

Part #: 4162pr0092 1× Black

Tile 1 x 8 with '...

Part #: 4162pr0108 1× Black

Plate Special 1 x...

Part #: 41740 3× Light Bluish Gray

Brick Special 1 x...

Part #: 4216 9× White

Wheel 11 x 8 with...

Part #: 42610 14× Red

Technic Pin 1/2 w...

Part #: 4274 2× Light Bluish Gray

Part #: 44861 1× White

Plate Special 1 x...

Part #: 44861 1× Yellow

Plate Special 1 x...

Part #: 44861 1× Red

Plate Special 1 x...

Part #: 44861 10× Black

Brick Special 1 x...

Part #: 44865 2× Red

Technic Axle 3

Part #: 4519 4× Light Bluish Gray

Brick Special 1 x...

Part #: 4595 1× Black

Pneumatic T-Piece...

Part #: 4697b 1× Light Bluish Gray

Brick Special 1 x...

Part #: 4733 1× Reddish Brown

Dish 2 x 2 Invert...

Part #: 4740 1× Green

Brick Curved 1 x ...

Part #: 49307 2× Red

Plate Special 1 x...

Part #: 49668 1× Bright Light Orange

Plate Special 1 x...

Part #: 49668 1× Light Bluish Gray

Brick Sloped 30° ...

Part #: 54200 1× Dark Red

Brick Sloped 30° ...

Part #: 54200 1× Trans-Yellow

Brick Sloped 30° ...

Part #: 54200 5× White

Brick Sloped 30° ...

Part #: 54200 8× Dark Bluish Gray

Brick Sloped 30° ...

Part #: 54200 1× Blue

Brick Sloped 30° ...

Part #: 54200 2× Yellow

Brick Sloped 30° ...

Part #: 54200 2× Dark Blue

Propeller with Pin

Part #: 54568 1× Yellow

Technic Axle Conn...

Part #: 57585 1× Reddish Brown

Cone 1 x 1 [Top G...

Part #: 59900 3× Dark Green

Window 1 x 2 x 2 ...

Part #: 60032 6× Red

Plate Special 1 x...

Part #: 60478 1× Medium Nougat

Plate Special 1 x...

Part #: 60478 1× Yellow

Plate 1 x 12

Part #: 60479 4× Red

Plate 1 x 12

Part #: 60479 12× Dark Bluish Gray

Plate 1 x 12

Part #: 60479 6× Black

Equipment Hose No...

Part #: 60849 1× Light Bluish Gray

Plate Round 1 x 1...

Part #: 6141 1× Medium Nougat

Plate Round 1 x 1...

Part #: 6141 3× Yellow

Panel 1 x 1 x 1 C...

Part #: 6231 2× Yellow

Panel 1 x 1 x 1 C...

Part #: 6231 4× Red

Panel 1 x 1 x 1 C...

Part #: 6231 4× White

Tile 1 x 3

Part #: 63864 2× Green

Tile 1 x 3

Part #: 63864 15× Light Bluish Gray

Technic Brick 1 x...

Part #: 6541 12× Blue

Technic Brick 1 x...

Part #: 6541 5× Yellow

Technic Brick 1 x...

Part #: 6541 5× Dark Bluish Gray

Plate Special 2 x...

Part #: 65509 1× Red

Bar, Angled with ...

Part #: 65578 1× Light Bluish Gray

Tile 1 x 6 with G...

Part #: 6636 6× Light Bluish Gray

Tile 1 x 6 with G...

Part #: 6636 6× Yellow

Tile 1 x 6 with G...

Part #: 6636 4× Blue

Plate Special 1 x...

Part #: 66897 4× Light Bluish Gray

Tile 2 x 6

Part #: 69729 4× Red

Technic Brick 1 x...

Part #: 73230 12× Dark Bluish Gray

Technic Brick 1 x...

Part #: 73230 3× Medium Nougat

Bracket 1 x 1 - 1...

Part #: 73825 1× Yellow

Hose Rigid 3mm D....

Part #: 75c18 2× Black

Part #: 78329 4× Light Bluish Gray

Plate 1 x 5

Part #: 78329 1× White

Bracket 1 x 1 - 1...

Part #: 79389 4× White

Brick Round Corne...

Part #: 85080 1× Light Bluish Gray

Plate Round 1 x 1...

Part #: 85861 1× Green

Tile 2 x 4 with G...

Part #: 87079 2× Blue

Tile 2 x 4 with G...

Part #: 87079 2× Yellow

Plate Special 2 x...

Part #: 87580 13× Dark Bluish Gray

Plate Special 2 x...

Part #: 87580 2× Light Bluish Gray

Plate Special 2 x...

Part #: 87580 2× White

Plate Special 2 x...

Part #: 87580 1× Blue

Plate Special 2 x...

Part #: 87580 3× Yellow

Plate Special 2 x...

Part #: 87580 4× Red

Bar 3L

Part #: 87994 1× Black

Minifig Trophy St...

Part #: 90398 1× Dark Red

Plate 16 x 16

Part #: 91405 1× Black

Plate 2 x 14

Part #: 91988 1× Light Bluish Gray

Tyre 17.5 x 6 wit...

Part #: 92409 4× Black

Plate 8 x 16

Part #: 92438 1× Black

Wheel 11 x 6 with...

Part #: 93593 4× Light Bluish Gray

Brick and Axle Se...

Part #: 96874 1× Orange

Tile Round 1 x 1

Part #: 98138 3× Dark Blue

Tile Round 1 x 1

Part #: 98138 4× Red

Tile Round 1 x 1

Part #: 98138 3× Yellow

Tile Special 1 x ...

Part #: 99563 2× Light Bluish Gray

Bracket 1 x 2 - 1...

Part #: 99781 1× Blue

The set includes a solid collection of basic bricks and tiles in useful colors like Dark Bluish Gray and Black, offering a good starting point for MOC builders. The printed Light Bluish Gray tiles add a touch of detail and exclusivity to the set.