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 18+.

When was the Building Systems released?

Building Systems was released in 2024.

⚠ RETIRING SOON

🏛 LEGO Exclusive

Set #40505

Building Systems

Name: Building Systems
Brand: LEGO
SKU: 40505-1

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

🏆 Best For: LEGO enthusiasts, AFOLs, anyone interested in LEGO history and building techniques ⏱ 4.5 hr build 🧩 1,211 pcs

★★★★☆ 4.2

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.

MSRP

$99.99

Best Price

$105.51

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📝 Our Take

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

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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

🧩

1,211

Pieces

⏱

4.5h

Build Time

📊

Intermediate

Difficulty

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

↑ Trending up since release

Investment Grade

⏳ Appreciating

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.

📦 Full Parts Inventory - 133 unique parts • 1,173 total pieces

Plate 3 x 3

Part #: 11212 16× Dark Bluish Gray

Sports Roller Skate

Part #: 11253 3× Black

Sports Roller Skate

Part #: 11253 3× Red

Sports Roller Skate

Part #: 11253 2× Flat Silver

Sports Roller Skate

Part #: 11253 2× Blue

Tile 2 x 2 Corner

Part #: 14719 1× Dark Bluish Gray

Tile 2 x 2 Corner

Part #: 14719 1× Blue

Slope 45° 2 x 1 T...

Part #: 15571 1× Blue

Plate Special 1 x...

Part #: 15573 5× Blue

Plate Special 1 x...

Part #: 15573 3× Black

Plate Special 1 x...

Part #: 15573 13× Dark Bluish Gray

Plate Special 1 x...

Part #: 15573 14× Light Bluish Gray

Plate Special 1 x...

Part #: 15573 2× White

Plate Special 1 x...

Part #: 15573 2× Yellow

Plate Special 1 x...

Part #: 15573 10× Red

Plate Special 1 x...

Part #: 15573 4× Green

Tile Special 1 x ...

Part #: 15712 1× Black

Tile Special 1 x ...

Part #: 15712 2× Yellow

Tile Special 1 x ...

Part #: 15712 3× Red

Tile Special 1 x ...

Part #: 15712 2× White

Plate Round 1 x 2...

Part #: 1745 3× Light Bluish Gray

Plate Round 1 x 2...

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 Round 1 x 1 ...

Part #: 20482 2× Black

Slope 45° 1 x 1 x...

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 2× Red

Tile Round 1 x 1 ...

Part #: 24246 1× Dark Red

Tile Round 1 x 1 ...

Part #: 24246 1× Yellow

Tile Round 1 x 1 ...

Part #: 24246 1× Blue

Wedge Plate 2 x 2...

Part #: 24299 1× Light Bluish Gray

Wedge Plate 2 x 2...

Part #: 24299 1× Green

Wedge Plate 2 x 2...

Part #: 24307 1× Light Bluish Gray

Wedge Plate 2 x 2...

Part #: 24307 1× Green

Part #: 2431 1× White

Plate 2 x 12

Part #: 2445 4× Dark Bluish Gray

Brick 2 x 6

Part #: 2456 5× Dark Bluish Gray

Plant, Flower, Pl...

Part #: 24866 1× 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 2× Green

Tile 2 x 3

Part #: 26603 4× Red

Slope Curved 2 x ...

Part #: 29119 1× Dark Green

Slope Curved 2 x ...

Part #: 29120 1× Dark Green

Brick 2 x 4

Part #: 3001 1× Red

Brick 2 x 4

Part #: 3001 7× Dark Bluish Gray

Brick 2 x 4

Part #: 3001 2× Yellow

Brick 2 x 2

Part #: 3003 5× Dark Bluish Gray

Brick 2 x 2

Part #: 3003 2× Blue

Brick 2 x 2

Part #: 3003 1× Yellow

Brick 1 x 2

Part #: 3004 40× Dark Bluish Gray

Brick 1 x 2

Part #: 3004 1× Red

Brick 1 x 1

Part #: 3005 4× White

Brick 1 x 4

Part #: 3010 71× Dark Bluish Gray

Brick 1 x 4

Part #: 3010 1× Red

Brick Curved 2 x ...

Part #: 30165 1× Blue

Plate 2 x 4

Part #: 3020 2× Yellow

Part #: 3021 1× Green

Plate 2 x 3

Part #: 3021 5× White

Plate 2 x 3

Part #: 3021 3× Red

Plate 2 x 2

Part #: 3022 2× Yellow

Plate 2 x 2

Part #: 3022 11× Dark Bluish Gray

Plate 2 x 2

Part #: 3022 4× White

Plate 2 x 2

Part #: 3022 8× Pearl Gold

Plate 2 x 2

Part #: 3022 1× Blue

Plate 2 x 2

Part #: 3022 1× Green

Plate 1 x 2

Part #: 3023 7× Green

Plate 1 x 2

Part #: 3023 5× Yellow

Plate 1 x 2

Part #: 3023 5× Trans-Clear

Plate 1 x 2

Part #: 3023 12× Dark Bluish Gray

Plate 1 x 2

Part #: 3023 6× Red

Plate 1 x 2

Part #: 3023 1× Light Bluish Gray

Plate 1 x 2

Part #: 3023 1× Reddish Brown

Plate 1 x 2

Part #: 3023 2× White

Plate 1 x 1

Part #: 3024 1× Sand Green

Plate 1 x 1

Part #: 3024 2× Dark Green

Plate 1 x 1

Part #: 3024 1× Medium Blue

Plate 1 x 1

Part #: 3024 4× Dark Bluish Gray

Plate 1 x 1

Part #: 3024 2× Light Bluish Gray

Plate 1 x 1

Part #: 3024 12× Trans-Clear

Plate 1 x 1

Part #: 3024 4× Lavender

Plate 1 x 1

Part #: 3024 28× White

Plate 1 x 1

Part #: 3024 6× Red

Plate 1 x 1

Part #: 3024 9× Yellow

Plate 1 x 1

Part #: 3024 1× Green

Plate 1 x 1

Part #: 3024 9× Blue

Plate 1 x 1

Part #: 3024 11× Black

Plate 4 x 12

Part #: 3029 16× Black

Plate 6 x 10

Part #: 3033 3× Yellow

Plate 6 x 10

Part #: 3033 2× Blue

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

Slope 45° 2 x 1 D...

Part #: 3044c 1× Red

Brick Round 1 x 1...

Part #: 3062b 2× Blue

Brick Round 1 x 1...

Part #: 3062b 1× Yellow

Brick Round 1 x 1...

Part #: 3062b 1× Light Bluish Gray

Tile 2 x 2 with G...

Part #: 3068b 6× Green

Tile 2 x 2 with G...

Part #: 3068b 1× Red

Tile 2 x 2 with G...

Part #: 3068b 11× Dark Bluish Gray

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 26× Blue

Tile 1 x 2 with G...

Part #: 3069b 17× 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 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 1× Red

Tile 1 x 1 with G...

Part #: 3070b 1× Blue

Tile 1 x 1 with G...

Part #: 3070b 1× Green

Tile 1 x 1 with G...

Part #: 3070b 1× 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× White

Technic Bush 1/2 ...

Part #: 32123b 1× Light Bluish Gray

Technic Pin Conne...

Part #: 32530 2× Yellow

Plate Round 1 x 1...

Part #: 32828 1× Dark Green

Plate Round 1 x 1...

Part #: 32828 1× Black

Plate Special 2 x...

Part #: 33909 4× Yellow

Plate Special 2 x...

Part #: 33909 4× Blue

Plate Special 2 x...

Part #: 33909 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 4× Red

Plate Special 1 x...

Part #: 34103 5× Green

Plate Special 1 x...

Part #: 34103 2× White

Plate 1 x 8

Part #: 3460 4× Blue

Plate 1 x 8

Part #: 3460 6× Yellow

Part #: 35464 1× Black

Slope Double 45° ...

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× Blue

Plate 1 x 3

Part #: 3623 2× Yellow

Plate 1 x 3

Part #: 3623 1× Red

Slope Inverted 45...

Part #: 3660 1× Dark Bluish Gray

Slope Inverted 45...

Part #: 3665 8× Dark Bluish Gray

Technic Pin witho...

Part #: 3673 14× Yellow

Bracket 1 x 1 - 1...

Part #: 36840 2× Black

Bracket 1 x 1 - 1...

Part #: 36840 3× Blue

Bracket 1 x 1 - 1...

Part #: 36840 5× Yellow

Bracket 1 x 1 - 1...

Part #: 36840 1× Dark Bluish Gray

Part #: 3710 4× Black

Plate 1 x 4

Part #: 3710 1× White

Plate 1 x 4

Part #: 3710 2× Dark Bluish Gray

Plate 1 x 4

Part #: 3710 6× Red

Brick Curved 1 x ...

Part #: 37352 2× White

Plate 2 x 6

Part #: 3795 2× Red

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 14× Red

Brick Special 1 x...

Part #: 4070 1× Dark Red

Brick Special 1 x...

Part #: 4070 2× Yellow

Brick Special 1 x...

Part #: 4070 6× White

Brick Special 1 x...

Part #: 4070 1× Blue

Tile 1 x 8 with G...

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

Part #: 4274 1× Light Bluish Gray

Part #: 44861 10× Black

Plate Special 1 x...

Part #: 44861 1× White

Plate Special 1 x...

Part #: 44861 1× Yellow

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

Slope 30° 1 x 1 x...

Part #: 54200 1× Yellow

Slope 30° 1 x 1 x...

Part #: 54200 1× Dark Red

Slope 30° 1 x 1 x...

Part #: 54200 2× White

Slope 30° 1 x 1 x...

Part #: 54200 3× Dark Bluish Gray

Slope 30° 1 x 1 x...

Part #: 54200 2× Dark Blue

Slope 30° 1 x 1 x...

Part #: 54200 1× Blue

Slope 30° 1 x 1 x...

Part #: 54200 1× Trans-Yellow

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× Yellow

Plate Special 1 x...

Part #: 60478 1× Medium Nougat

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× Yellow

Plate Round 1 x 1...

Part #: 6141 1× Medium Nougat

Panel 1 x 1 x 1 C...

Part #: 6231 4× White

Panel 1 x 1 x 1 C...

Part #: 6231 4× Red

Panel 1 x 1 x 1 C...

Part #: 6231 2× Yellow

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× Dark Bluish Gray

Technic Brick 1 x...

Part #: 6541 5× Yellow

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 4× Blue

Tile 1 x 6 with G...

Part #: 6636 6× Light Bluish Gray

Tile 1 x 6 with G...

Part #: 6636 6× Yellow

Plate Special 1 x...

Part #: 66897 4× Light Bluish Gray

Tile 2 x 6

Part #: 69729 4× Red

Technic Brick 1 x...

Part #: 73230 3× Medium Nougat

Technic Brick 1 x...

Part #: 73230 12× Dark Bluish Gray

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× Yellow

Tile 2 x 4 with G...

Part #: 87079 2× Blue

Plate Special 2 x...

Part #: 87580 1× Blue

Plate Special 2 x...

Part #: 87580 4× Red

Plate Special 2 x...

Part #: 87580 2× White

Plate Special 2 x...

Part #: 87580 2× Light Bluish Gray

Plate Special 2 x...

Part #: 87580 13× Dark Bluish Gray

Plate Special 2 x...

Part #: 87580 3× Yellow

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 1× Red

Tile Round 1 x 1

Part #: 98138 3× Dark Blue

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.

🛒 Where to Buy

Bricklink

✓ In Stock

$104.99

💎 Notable Parts

Black Tile 1 x 2 with Groove (50x) $3.75

Black Tile 2 x 2 with Groove (44x) $4.40

Dark Bluish Gray Brick 1 x 4 (71x) $4.97

Light Bluish Gray Tile 1 x 1 with White Lines/Stripes print (19x) $5.70

Est. BrickLink Part Value

$18.82

💡 MOC Potential

🏙 Expand the display into a full LEGO exhibit featuring historical models and building techniques.

🚗 Rebuild the elements into miniature LEGO vehicles from different eras.

🏛 Create a LEGO museum diorama showcasing iconic sets and minifigures.

📰 LEGO Exclusive News

Community Insights

Real opinions from Reddit and YouTube

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Inventory Statistics

133

Unique Parts

1,173

Total Pieces

Minifigures

Inventory Version: 1

A Tribute to LEGO History!
Celebrate the Building Systems

Building Systems

📝 Our Take

Ask BlockTalk about this set

🧱 Building Experience

📈 Investment Analysis

⚖ Compare Similar Sets

📦 Full Parts Inventory - 133 unique parts • 1,173 total pieces

🛒 Where to Buy

💎 Notable Parts

💡 MOC Potential

📰 LEGO Exclusive News

Custom LEGO 2008 Hulk

Every LEGO Collab Standard, Themed Month and Recurring Contest