Universal Building Set (20-1) is a Universal Building Set LEGO set released in 1976 with 218 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing Universal Building Set sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 53 unique part types.
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Buying checklist
Quick context before you buy this set used or verify a marketplace listing.
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Release year
1976 (50 years ago — may be retired)
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Catalog scale
218 parts listed · 53 inventory lines tracked
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Minifigures
No minifigs in inventory (brick-only or Technic set)
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Build manual
No digital manual in our catalog — check the box tab or LEGO.com
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Gray era
Pre-2004 set — may use old light/dark gray instead of bluish gray
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Shipping weight (est.)
~573 g for parts inventory (excludes box/minifig packaging)
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Before you buy used
Run the completion checker, compare photos to the inventory, and check live listings for sealed pricing
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Market value
No estimate on BrickID yet
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Parts in this set
53 parts · page 1 of 2 · updating…
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Arm Holder Brick 2 x 2 with Hole and 2 Arms792c03 · ×1 · White -
Arm Piece Straight with 2 and 3 Fingers3612 · ×2 · White -
Arm Piece with Towball Socket, 3 Fingers3613 · ×2 · White -
Brick 1 x 23004 · ×6 · Blue -
Brick 1 x 23004 · ×6 · White -
Brick 1 x 23004 · ×6 · Red -
Brick 1 x 23004 · ×6 · Black -
Brick 1 x 23004 · ×6 · Yellow -
Brick 1 x 43010 · ×2 · White -
Brick 1 x 63009 · ×2 · Yellow -
Brick 1 x 83008 · ×2 · White -
Brick 1 x 83008 · ×2 · Blue -
Brick 10 x 20 with Bottom Tubes in single row around edge, with dual '+' Cross Supports700c · ×1 · Green -
Brick 2 x 2 without Inside Ridges3003a · ×6 · Red -
Brick 2 x 2 without Inside Ridges3003a · ×2 · Trans-Clear -
Brick 2 x 2 without Inside Ridges3003a · ×12 · Black -
Brick 2 x 2 without Inside Ridges3003a · ×6 · Yellow -
Brick 2 x 2 without Inside Ridges3003a · ×6 · Blue -
Brick 2 x 2 without Inside Ridges3003a · ×6 · White -
Brick 2 x 3 without Cross Supports3002a · ×4 · White -
Brick 2 x 3 without Cross Supports3002a · ×4 · Red -
Brick 2 x 3 without Cross Supports3002a · ×4 · Yellow -
Brick 2 x 3 without Cross Supports3002a · ×4 · Blue -
Brick 2 x 4 without Cross Supports3001a · ×12 · Blue -
Brick 2 x 4 without Cross Supports3001a · ×12 · White -
Brick 2 x 4 without Cross Supports3001a · ×12 · Red -
Brick 2 x 4 without Cross Supports3001a · ×2 · Trans-Clear -
Brick 2 x 4 without Cross Supports3001a · ×12 · Black -
Brick 2 x 4 without Cross Supports3001a · ×12 · Yellow -
Brick 2 x 83007 · ×2 · Red -
Brick Sloped 45° 2 x 23039 · ×4 · Blue -
Brick Sloped 45° 2 x 23039 · ×6 · Red -
![Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]](https://cdn.rebrickable.com/media/parts/elements/366023.jpg)
Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]3660 · ×4 · Blue -
![Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]](https://cdn.rebrickable.com/media/parts/elements/366021.jpg)
Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]3660 · ×6 · Red -
Brick Special 1 x 1 x 2 with Shutter Holder3581 · ×4 · Red -
![Brick Special 2 x 2 [Red Wheels for Single Tyre]](https://cdn.rebrickable.com/media/parts/ldraw/0/3137c01.png)
Brick Special 2 x 2 [Red Wheels for Single Tyre]3137c01 · ×2 · Black -
Door 1 x 3 x 4 with Glass7930 · ×1 · Blue -
Door Frame 1 x 3 x 43579 · ×1 · Red -
Fence Lattice 1 x 4 x 23185 · ×4 · White -
Homemaker Figure Head with Face Print685pr0001 · ×1 · Yellow -
Homemaker Hair Longupn0223 · ×1 · Black -
Homemaker Hat, Police Styleupn0247 · ×1 · Blue -
Plant, Pine Tree, Large, 4 x 4 x 6 2/33471 · ×1 · Green -
Plate 2 x 33021 · ×1 · Black -
Plate 2 x 83034 · ×2 · Blue -
Plate 4 x 63032 · ×1 · Yellow -
Plate 4 x 83035 · ×1 · Blue -
Plate 6 x 103033 · ×1 · Red