Basic Building Set (735-1) is a Basic LEGO set released in 1990 with 538 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing Basic sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 141 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
1990 (36 years ago — may be retired)
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Catalog scale
538 parts listed · 141 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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Build complexity
Large set — expect sticker sheets or multiple subassemblies; inspect photos closely
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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.)
~1,123 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
141 parts · page 1 of 3 · updating…
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![Bar 1 x 6 [Open Studs]](https://cdn.rebrickable.com/media/parts/ldraw/15/4873.png)
Bar 1 x 6 [Open Studs]4873 · ×2 · White -
![Battery Box, 9V Small [Complete Assembly]](https://cdn.rebrickable.com/media/parts/ldraw/15/4760c01.png)
Battery Box, 9V Small [Complete Assembly]4760c01 · ×1 · White -
Brick 1 x 13005 · ×28 · Red -
Brick 1 x 13005 · ×2 · Light Gray -
Brick 1 x 1 with Thick Bold Black '3' Print3005pr9998 · ×4 · White -
Brick 1 x 23004 · ×2 · Black -
Brick 1 x 23004 · ×8 · White -
Brick 1 x 23004 · ×24 · Red -
Brick 1 x 23004 · ×1 · Light Gray -
Brick 1 x 2 x 2 with Inside Axle Holder with Fire Logo Print3245bpr0010 · ×2 · Red -
Brick 1 x 33622 · ×8 · Red -
Brick 1 x 33622 · ×4 · White -
Brick 1 x 3 with Control Panel Print3622pr9994 · ×2 · White -
Brick 1 x 43010 · ×10 · Red -
Brick 1 x 4 with Red Danger Stripes Print3010pr9976 · ×1 · White -
Brick 1 x 63009 · ×11 · Red -
Brick 1 x 63009 · ×2 · White -
Brick 1 x 83008 · ×7 · Red -
Brick 2 x 23003 · ×1 · Light Gray -
Brick 2 x 23003 · ×4 · White -
Brick 2 x 23003 · ×2 · Red -
Brick 2 x 2 Corner2357 · ×4 · Red -
Brick 2 x 43001 · ×1 · Red -
Brick 2 x 62456 · ×1 · Red -
Brick Round 1 x 1 Open Stud3062b · ×8 · Light Gray -
Brick Round 1 x 1 Open Stud3062b · ×4 · Yellow -
Brick Round 1 x 1 Open Stud3062b · ×3 · Blue -
Brick Round 1 x 1 x 2/3 Light Bulb Cover4770 · ×4 · Trans-Green -
Brick Round 1 x 1 x 2/3 Light Bulb Cover4770 · ×4 · Trans-Red -
Brick Round 1 x 1 x 2/3 Light Bulb Cover4770 · ×4 · Trans-Dark Blue -
Brick Round 1 x 1 x 2/3 Light Bulb Cover4770 · ×6 · Trans-Yellow -
Brick Round 2 x 2 with Buttons on Black Panel Print on Two Sides3941pr0002 · ×3 · Light Gray -
Brick Sloped 45° 2 x 1 with Bottom Pin3040b · ×2 · Red -
Brick Sloped 45° 2 x 1 with Bottom Pin3040b · ×2 · Light Gray -
Brick Sloped 45° 2 x 23039 · ×1 · Red -
Brick Sloped 45° 2 x 2 with 12 Buttons, 3 Red Lamps, Black Panel Print3039pr9996 · ×3 · Light Gray -
Brick Sloped 45° 2 x 33038 · ×2 · Red -
Brick Sloped 45° 2 x 43037 · ×2 · Red -
Brick Sloped Inverted 45° 2 x 13665 · ×12 · Red -
![Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]](https://cdn.rebrickable.com/media/parts/elements/366001.jpg)
Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]3660 · ×12 · White -
Brick Special 1 x 1 with Headlight4070 · ×8 · White -
Brick Special 1 x 1 with Headlight4070 · ×14 · Red -
Brick Special 1 x 1 with Headlight4070 · ×2 · Light Gray -
![Cone 1 x 1 [No Top Groove]](https://cdn.rebrickable.com/media/parts/elements/458902.jpg)
Cone 1 x 1 [No Top Groove]4589 · ×1 · Light Gray -
Door 1 x 3 x 2 Left3189 · ×2 · Red -
Door 1 x 3 x 2 Right3188 · ×2 · Red -
Door 1 x 3 x 4 Left3193 · ×3 · Light Gray -
Door 1 x 3 x 4 Left3193 · ×1 · Red